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linux/arch/powerpc/kernel/head_booke.h

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License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#ifndef __HEAD_BOOKE_H__
#define __HEAD_BOOKE_H__
powerpc/booke: Add Stack Marking support to Booke Exception Prolog This patch adds a marker to the exception stack frame to aid in debugging. It's already inserted on other platforms and xmon recognizes it and identifies exception frames when showing stack traces. Signed-off-by: Torez Smith <lnxtorez@linux.vnet.ibm.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2010-03-05 10:43:01 +00:00
#include <asm/ptrace.h> /* for STACK_FRAME_REGS_MARKER */
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#include <asm/kvm_asm.h>
KVM: PPC: booke: category E.HV (GS-mode) support Chips such as e500mc that implement category E.HV in Power ISA 2.06 provide hardware virtualization features, including a new MSR mode for guest state. The guest OS can perform many operations without trapping into the hypervisor, including transitions to and from guest userspace. Since we can use SRR1[GS] to reliably tell whether an exception came from guest state, instead of messing around with IVPR, we use DO_KVM similarly to book3s. Current issues include: - Machine checks from guest state are not routed to the host handler. - The guest can cause a host oops by executing an emulated instruction in a page that lacks read permission. Existing e500/4xx support has the same problem. Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>, Varun Sethi <Varun.Sethi@freescale.com>, and Liu Yu <yu.liu@freescale.com>. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: remove pt_regs usage] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:43 +00:00
#include <asm/kvm_booke_hv_asm.h>
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
#ifdef __ASSEMBLY__
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
/*
* Macros used for common Book-e exception handling
*/
#define SET_IVOR(vector_number, vector_label) \
li r26,vector_label@l; \
mtspr SPRN_IVOR##vector_number,r26; \
sync
powerpc/44x: Support for 256KB PAGE_SIZE This patch adds support for 256KB pages on ppc44x-based boards. For simplification of implementation with 256KB pages we still assume 2-level paging. As a side effect this leads to wasting extra memory space reserved for PTE tables: only 1/4 of pages allocated for PTEs are actually used. But this may be an acceptable trade-off to achieve the high performance we have with big PAGE_SIZEs in some applications (e.g. RAID). Also with 256KB PAGE_SIZE we increase THREAD_SIZE up to 32KB to minimize the risk of stack overflows in the cases of on-stack arrays, which size depends on the page size (e.g. multipage BIOs, NTFS, etc.). With 256KB PAGE_SIZE we need to decrease the PKMAP_ORDER at least down to 9, otherwise all high memory (2 ^ 10 * PAGE_SIZE == 256MB) we'll be occupied by PKMAP addresses leaving no place for vmalloc. We do not separate PKMAP_ORDER for 256K from 16K/64K PAGE_SIZE here; actually that value of 10 in support for 16K/64K had been selected rather intuitively. Thus now for all cases of PAGE_SIZE on ppc44x (including the default, 4KB, one) we have 512 pages for PKMAP. Because ELF standard supports only page sizes up to 64K, then you should use binutils later than 2.17.50.0.3 with '-zmax-page-size' set to 256K for building applications, which are to be run with the 256KB-page sized kernel. If using the older binutils, then you should patch them like follows: --- binutils/bfd/elf32-ppc.c.orig +++ binutils/bfd/elf32-ppc.c -#define ELF_MAXPAGESIZE 0x10000 +#define ELF_MAXPAGESIZE 0x40000 One more restriction we currently have with 256KB page sizes is inability to use shmem safely, so, for now, the 256KB is available only if you turn the CONFIG_SHMEM option off (another variant is to use BROKEN). Though, if you need shmem with 256KB pages, you can always remove the !SHMEM dependency in 'config PPC_256K_PAGES', and use the workaround available here: http://lkml.org/lkml/2008/12/19/20 Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Ilya Yanok <yanok@emcraft.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2009-01-29 01:40:44 +00:00
#if (THREAD_SHIFT < 15)
#define ALLOC_STACK_FRAME(reg, val) \
addi reg,reg,val
#else
#define ALLOC_STACK_FRAME(reg, val) \
addis reg,reg,val@ha; \
addi reg,reg,val@l
#endif
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
/*
* Macro used to get to thread save registers.
* Note that entries 0-3 are used for the prolog code, and the remaining
* entries are available for specific exception use in the event a handler
* requires more than 4 scratch registers.
*/
#define THREAD_NORMSAVE(offset) (THREAD_NORMSAVES + (offset * 4))
powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup' Fixed the following build warning: powerpc-linux-gnu-ld: warning: orphan section `__btb_flush_fixup' from `arch/powerpc/kernel/head_44x.o' being placed in section `__btb_flush_fixup'. Signed-off-by: Diana Craciun <diana.craciun@nxp.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-12-23 20:34:25 +00:00
#ifdef CONFIG_PPC_FSL_BOOK3E
#define BOOKE_CLEAR_BTB(reg) \
START_BTB_FLUSH_SECTION \
BTB_FLUSH(reg) \
END_BTB_FLUSH_SECTION
#else
#define BOOKE_CLEAR_BTB(reg)
#endif
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#define NORMAL_EXCEPTION_PROLOG(intno) \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
mtspr SPRN_SPRG_WSCRATCH0, r10; /* save one register */ \
mfspr r10, SPRN_SPRG_THREAD; \
stw r11, THREAD_NORMSAVE(0)(r10); \
stw r13, THREAD_NORMSAVE(2)(r10); \
mfcr r13; /* save CR in r13 for now */\
KVM: PPC: booke: category E.HV (GS-mode) support Chips such as e500mc that implement category E.HV in Power ISA 2.06 provide hardware virtualization features, including a new MSR mode for guest state. The guest OS can perform many operations without trapping into the hypervisor, including transitions to and from guest userspace. Since we can use SRR1[GS] to reliably tell whether an exception came from guest state, instead of messing around with IVPR, we use DO_KVM similarly to book3s. Current issues include: - Machine checks from guest state are not routed to the host handler. - The guest can cause a host oops by executing an emulated instruction in a page that lacks read permission. Existing e500/4xx support has the same problem. Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>, Varun Sethi <Varun.Sethi@freescale.com>, and Liu Yu <yu.liu@freescale.com>. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: remove pt_regs usage] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:43 +00:00
mfspr r11, SPRN_SRR1; \
DO_KVM BOOKE_INTERRUPT_##intno SPRN_SRR1; \
andi. r11, r11, MSR_PR; /* check whether user or kernel */\
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
mr r11, r1; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
beq 1f; \
powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup' Fixed the following build warning: powerpc-linux-gnu-ld: warning: orphan section `__btb_flush_fixup' from `arch/powerpc/kernel/head_44x.o' being placed in section `__btb_flush_fixup'. Signed-off-by: Diana Craciun <diana.craciun@nxp.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-12-23 20:34:25 +00:00
BOOKE_CLEAR_BTB(r11) \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
/* if from user, start at top of this thread's kernel stack */ \
powerpc: Rename THREAD_INFO to TASK_STACK This patch renames THREAD_INFO to TASK_STACK, because it is in fact the offset of the pointer to the stack in task_struct so this pointer will not be impacted by the move of THREAD_INFO. Also make it available on 64-bit, as we'll need it there when we activate THREAD_INFO_IN_TASK. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Make available on 64-bit] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-31 10:08:54 +00:00
lwz r11, TASK_STACK - THREAD(r10); \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
ALLOC_STACK_FRAME(r11, THREAD_SIZE); \
1 : subi r11, r11, INT_FRAME_SIZE; /* Allocate exception frame */ \
stw r13, _CCR(r11); /* save various registers */ \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
mfspr r13, SPRN_SPRG_RSCRATCH0; \
stw r13, GPR10(r11); \
lwz r12, THREAD_NORMSAVE(0)(r10); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
stw r12,GPR11(r11); \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
lwz r13, THREAD_NORMSAVE(2)(r10); /* restore r13 */ \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mflr r10; \
stw r10,_LINK(r11); \
mfspr r12,SPRN_SRR0; \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
stw r1, GPR1(r11); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mfspr r9,SPRN_SRR1; \
powerpc/85xx: Save scratch registers to thread info instead of using SPRGs. We expect this is actually faster, and we end up needing more space than we can get from the SPRGs in some instances. This is also useful when running as a guest OS - SPRGs4-7 do not have guest versions. 8 slots are allocated in thread_info for this even though we only actually use 4 of them - this allows space for future code to have more scratch space (and we know we'll need it for things like hugetlb). Signed-off-by: Ashish Kalra <Ashish.Kalra@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-04-22 21:48:27 +00:00
stw r1, 0(r11); \
mr r1, r11; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
stw r0,GPR0(r11); \
powerpc/booke: Add Stack Marking support to Booke Exception Prolog This patch adds a marker to the exception stack frame to aid in debugging. It's already inserted on other platforms and xmon recognizes it and identifies exception frames when showing stack traces. Signed-off-by: Torez Smith <lnxtorez@linux.vnet.ibm.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2010-03-05 10:43:01 +00:00
lis r10, STACK_FRAME_REGS_MARKER@ha;/* exception frame marker */ \
addi r10, r10, STACK_FRAME_REGS_MARKER@l; \
stw r10, 8(r11); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
powerpc/32: fix build failure on book3e with KVM Build failure was introduced by the commit identified below, due to missed macro expension leading to wrong called function's name. arch/powerpc/kernel/head_fsl_booke.o: In function `SystemCall': arch/powerpc/kernel/head_fsl_booke.S:416: undefined reference to `kvmppc_handler_BOOKE_INTERRUPT_SYSCALL_SPRN_SRR1' Makefile:1052: recipe for target 'vmlinux' failed The called function should be kvmppc_handler_8_0x01B(). This patch fixes it. Reported-by: Paul Mackerras <paulus@ozlabs.org> Fixes: 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-05-23 08:39:27 +00:00
.macro SYSCALL_ENTRY trapno intno srr1
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
mfspr r10, SPRN_SPRG_THREAD
#ifdef CONFIG_KVM_BOOKE_HV
BEGIN_FTR_SECTION
mtspr SPRN_SPRG_WSCRATCH0, r10
stw r11, THREAD_NORMSAVE(0)(r10)
stw r13, THREAD_NORMSAVE(2)(r10)
mfcr r13 /* save CR in r13 for now */
mfspr r11, SPRN_SRR1
mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
bf 3, 1975f
powerpc/32: fix build failure on book3e with KVM Build failure was introduced by the commit identified below, due to missed macro expension leading to wrong called function's name. arch/powerpc/kernel/head_fsl_booke.o: In function `SystemCall': arch/powerpc/kernel/head_fsl_booke.S:416: undefined reference to `kvmppc_handler_BOOKE_INTERRUPT_SYSCALL_SPRN_SRR1' Makefile:1052: recipe for target 'vmlinux' failed The called function should be kvmppc_handler_8_0x01B(). This patch fixes it. Reported-by: Paul Mackerras <paulus@ozlabs.org> Fixes: 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-05-23 08:39:27 +00:00
b kvmppc_handler_\intno\()_\srr1
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
1975:
mr r12, r13
lwz r13, THREAD_NORMSAVE(2)(r10)
FTR_SECTION_ELSE
#endif
mfcr r12
#ifdef CONFIG_KVM_BOOKE_HV
ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
#endif
powerpc/32: Warn and return ENOSYS on syscalls from kernel Since commit b86fb88855ea ("powerpc/32: implement fast entry for syscalls on non BOOKE") and commit 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE"), syscalls from kernel are unexpected and can have catastrophic consequences as it will destroy the kernel stack. Test MSR_PR on syscall entry. In case syscall is from kernel, emit a warning and return ENOSYS error. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8ee3bdbbdfdfc64ca7001e90c43b2aee6f333578.1580470482.git.christophe.leroy@c-s.fr
2020-01-31 11:34:54 +00:00
mfspr r9, SPRN_SRR1
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
BOOKE_CLEAR_BTB(r11)
powerpc/32: Warn and return ENOSYS on syscalls from kernel Since commit b86fb88855ea ("powerpc/32: implement fast entry for syscalls on non BOOKE") and commit 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE"), syscalls from kernel are unexpected and can have catastrophic consequences as it will destroy the kernel stack. Test MSR_PR on syscall entry. In case syscall is from kernel, emit a warning and return ENOSYS error. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8ee3bdbbdfdfc64ca7001e90c43b2aee6f333578.1580470482.git.christophe.leroy@c-s.fr
2020-01-31 11:34:54 +00:00
andi. r11, r9, MSR_PR
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
lwz r11, TASK_STACK - THREAD(r10)
rlwinm r12,r12,0,4,2 /* Clear SO bit in CR */
powerpc/32: Warn and return ENOSYS on syscalls from kernel Since commit b86fb88855ea ("powerpc/32: implement fast entry for syscalls on non BOOKE") and commit 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE"), syscalls from kernel are unexpected and can have catastrophic consequences as it will destroy the kernel stack. Test MSR_PR on syscall entry. In case syscall is from kernel, emit a warning and return ENOSYS error. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8ee3bdbbdfdfc64ca7001e90c43b2aee6f333578.1580470482.git.christophe.leroy@c-s.fr
2020-01-31 11:34:54 +00:00
beq- 99f
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
ALLOC_STACK_FRAME(r11, THREAD_SIZE - INT_FRAME_SIZE)
stw r12, _CCR(r11) /* save various registers */
mflr r12
stw r12,_LINK(r11)
mfspr r12,SPRN_SRR0
stw r1, GPR1(r11)
stw r1, 0(r11)
mr r1, r11
stw r12,_NIP(r11)
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
lis r12, STACK_FRAME_REGS_MARKER@ha /* exception frame marker */
stw r2,GPR2(r11)
addi r12, r12, STACK_FRAME_REGS_MARKER@l
stw r9,_MSR(r11)
li r2, \trapno + 1
stw r12, 8(r11)
stw r2,_TRAP(r11)
SAVE_GPR(0, r11)
SAVE_4GPRS(3, r11)
SAVE_2GPRS(7, r11)
addi r11,r1,STACK_FRAME_OVERHEAD
addi r2,r10,-THREAD
stw r11,PT_REGS(r10)
/* Check to see if the dbcr0 register is set up to debug. Use the
internal debug mode bit to do this. */
lwz r12,THREAD_DBCR0(r10)
andis. r12,r12,DBCR0_IDM@h
ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
li r12,-1 /* clear all pending debug events */
mtspr SPRN_DBSR,r12
lis r11,global_dbcr0@ha
tophys(r11,r11)
addi r11,r11,global_dbcr0@l
#ifdef CONFIG_SMP
powerpc/booke: fix fast syscall entry on SMP Use r10 instead of r9 to calculate CPU offset as r9 contains the value from SRR1 which is used later. Fixes: 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-13 13:52:30 +00:00
lwz r10, TASK_CPU(r2)
slwi r10, r10, 3
add r11, r11, r10
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
#endif
lwz r12,0(r11)
mtspr SPRN_DBCR0,r12
lwz r12,4(r11)
addi r12,r12,-1
stw r12,4(r11)
3:
tovirt(r2, r2) /* set r2 to current */
lis r11, transfer_to_syscall@h
ori r11, r11, transfer_to_syscall@l
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* If MSR is changing we need to keep interrupts disabled at this point
* otherwise we might risk taking an interrupt before we tell lockdep
* they are enabled.
*/
lis r10, MSR_KERNEL@h
ori r10, r10, MSR_KERNEL@l
rlwimi r10, r9, 0, MSR_EE
#else
lis r10, (MSR_KERNEL | MSR_EE)@h
ori r10, r10, (MSR_KERNEL | MSR_EE)@l
#endif
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR0,r11
SYNC
RFI /* jump to handler, enable MMU */
powerpc/32: Warn and return ENOSYS on syscalls from kernel Since commit b86fb88855ea ("powerpc/32: implement fast entry for syscalls on non BOOKE") and commit 1a4b739bbb4f ("powerpc/32: implement fast entry for syscalls on BOOKE"), syscalls from kernel are unexpected and can have catastrophic consequences as it will destroy the kernel stack. Test MSR_PR on syscall entry. In case syscall is from kernel, emit a warning and return ENOSYS error. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8ee3bdbbdfdfc64ca7001e90c43b2aee6f333578.1580470482.git.christophe.leroy@c-s.fr
2020-01-31 11:34:54 +00:00
99: b ret_from_kernel_syscall
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
.endm
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
/* To handle the additional exception priority levels on 40x and Book-E
[POWERPC] Move to runtime allocated exception stacks For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 08:49:55 +00:00
* processors we allocate a stack per additional priority level.
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
*
* On 40x critical is the only additional level
* On 44x/e500 we have critical and machine check
* On e200 we have critical and debug (machine check occurs via critical)
*
* Additionally we reserve a SPRG for each priority level so we can free up a
* GPR to use as the base for indirect access to the exception stacks. This
* is necessary since the MMU is always on, for Book-E parts, and the stacks
* are offset from KERNELBASE.
*
[POWERPC] Rework Book-E debug exception handling The architecture allows for "Book-E" style debug interrupts to either go to critial interrupts of their own debug interrupt level. To allow for a dynamic kernel to support machines of either type we want to be able to compile in the interrupt handling code for both exception levels. Towards this goal we renamed the debug handling macros to specify the interrupt level in their name (DEBUG_CRIT_EXCEPTION/DebugCrit and DEBUG_DEBUG_EXCEPTION/DebugDebug). Additionally, on the Freescale Book-e parts we expanded the exception stacks to cover the maximum case of needing three exception stacks (normal, machine check and debug). There is some kernel text space optimization to be gained if a kernel is configured for a specific Freescale implementation but we aren't handling that now to allow for the single kernel image support. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-04-09 11:06:11 +00:00
* There is some space optimization to be had here if desired. However
* to allow for a common kernel with support for debug exceptions either
* going to critical or their own debug level we aren't currently
* providing configurations that micro-optimize space usage.
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
*/
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
#define MC_STACK_BASE mcheckirq_ctx
[POWERPC] Move to runtime allocated exception stacks For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 08:49:55 +00:00
#define CRIT_STACK_BASE critirq_ctx
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
powerpc/booke: Add support for new e500mc core The new e500mc core from Freescale is based on the e500v2 but with the following changes: * Supports only the Enhanced Debug Architecture (DSRR0/1, etc) * Floating Point * No SPE * Supports lwsync * Doorbell Exceptions * Hypervisor * Cache line size is now 64-bytes (e500v1/v2 have a 32-byte cache line) Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-16 14:41:32 +00:00
/* only on e500mc/e200 */
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
#define DBG_STACK_BASE dbgirq_ctx
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
[POWERPC] 40x/Book-E: Save/restore volatile exception registers On machines with more than one exception level any system register that might be modified by the "normal" exception level needs to be saved and restored on taking a higher level exception. We already are saving and restoring ESR and DEAR. For critical level add SRR0/1. For debug level add CSRR0/1 and SRR0/1. For machine check level add DSRR0/1, CSRR0/1, and SRR0/1. On FSL Book-E parts we always save/restore the MAS registers for critical, debug, and machine check level exceptions. On 44x we always save/restore the MMUCR. Additionally, we save and restore the ksp_limit since we have to adjust it for each exception level. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 10:23:21 +00:00
#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#ifdef CONFIG_SMP
#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
mfspr r8,SPRN_PIR; \
[POWERPC] Move to runtime allocated exception stacks For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 08:49:55 +00:00
slwi r8,r8,2; \
addis r8,r8,level##_STACK_BASE@ha; \
lwz r8,level##_STACK_BASE@l(r8); \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
addi r8,r8,EXC_LVL_FRAME_OVERHEAD;
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#else
#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
[POWERPC] Move to runtime allocated exception stacks For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 08:49:55 +00:00
lis r8,level##_STACK_BASE@ha; \
lwz r8,level##_STACK_BASE@l(r8); \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
addi r8,r8,EXC_LVL_FRAME_OVERHEAD;
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#endif
/*
* Exception prolog for critical/machine check exceptions. This is a
* little different from the normal exception prolog above since a
* critical/machine check exception can potentially occur at any point
* during normal exception processing. Thus we cannot use the same SPRG
* registers as the normal prolog above. Instead we use a portion of the
* critical/machine check exception stack at low physical addresses.
*/
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, intno, exc_level_srr0, exc_level_srr1) \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mtspr SPRN_SPRG_WSCRATCH_##exc_level,r8; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
stw r9,GPR9(r8); /* save various registers */\
mfcr r9; /* save CR in r9 for now */\
stw r10,GPR10(r8); \
stw r11,GPR11(r8); \
stw r9,_CCR(r8); /* save CR on stack */\
KVM: PPC: booke: category E.HV (GS-mode) support Chips such as e500mc that implement category E.HV in Power ISA 2.06 provide hardware virtualization features, including a new MSR mode for guest state. The guest OS can perform many operations without trapping into the hypervisor, including transitions to and from guest userspace. Since we can use SRR1[GS] to reliably tell whether an exception came from guest state, instead of messing around with IVPR, we use DO_KVM similarly to book3s. Current issues include: - Machine checks from guest state are not routed to the host handler. - The guest can cause a host oops by executing an emulated instruction in a page that lacks read permission. Existing e500/4xx support has the same problem. Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>, Varun Sethi <Varun.Sethi@freescale.com>, and Liu Yu <yu.liu@freescale.com>. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: remove pt_regs usage] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:43 +00:00
mfspr r11,exc_level_srr1; /* check whether user or kernel */\
DO_KVM BOOKE_INTERRUPT_##intno exc_level_srr1; \
powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup' Fixed the following build warning: powerpc-linux-gnu-ld: warning: orphan section `__btb_flush_fixup' from `arch/powerpc/kernel/head_44x.o' being placed in section `__btb_flush_fixup'. Signed-off-by: Diana Craciun <diana.craciun@nxp.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-12-23 20:34:25 +00:00
BOOKE_CLEAR_BTB(r10) \
KVM: PPC: booke: category E.HV (GS-mode) support Chips such as e500mc that implement category E.HV in Power ISA 2.06 provide hardware virtualization features, including a new MSR mode for guest state. The guest OS can perform many operations without trapping into the hypervisor, including transitions to and from guest userspace. Since we can use SRR1[GS] to reliably tell whether an exception came from guest state, instead of messing around with IVPR, we use DO_KVM similarly to book3s. Current issues include: - Machine checks from guest state are not routed to the host handler. - The guest can cause a host oops by executing an emulated instruction in a page that lacks read permission. Existing e500/4xx support has the same problem. Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>, Varun Sethi <Varun.Sethi@freescale.com>, and Liu Yu <yu.liu@freescale.com>. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: remove pt_regs usage] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:43 +00:00
andi. r11,r11,MSR_PR; \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
powerpc: Rename THREAD_INFO to TASK_STACK This patch renames THREAD_INFO to TASK_STACK, because it is in fact the offset of the pointer to the stack in task_struct so this pointer will not be impacted by the move of THREAD_INFO. Also make it available on 64-bit, as we'll need it there when we activate THREAD_INFO_IN_TASK. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Make available on 64-bit] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-31 10:08:54 +00:00
lwz r11, TASK_STACK - THREAD(r11); /* this thread's kernel stack */\
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\
beq 1f; \
/* COMING FROM USER MODE */ \
stw r9,_CCR(r11); /* save CR */\
lwz r10,GPR10(r8); /* copy regs from exception stack */\
lwz r9,GPR9(r8); \
stw r10,GPR10(r11); \
lwz r10,GPR11(r8); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
stw r9,GPR9(r11); \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
stw r10,GPR11(r11); \
b 2f; \
/* COMING FROM PRIV MODE */ \
powerpc: Activate CONFIG_THREAD_INFO_IN_TASK This patch activates CONFIG_THREAD_INFO_IN_TASK which moves the thread_info into task_struct. Moving thread_info into task_struct has the following advantages: - It protects thread_info from corruption in the case of stack overflows. - Its address is harder to determine if stack addresses are leaked, making a number of attacks more difficult. This has the following consequences: - thread_info is now located at the beginning of task_struct. - The 'cpu' field is now in task_struct, and only exists when CONFIG_SMP is active. - thread_info doesn't have anymore the 'task' field. This patch: - Removes all recopy of thread_info struct when the stack changes. - Changes the CURRENT_THREAD_INFO() macro to point to current. - Selects CONFIG_THREAD_INFO_IN_TASK. - Modifies raw_smp_processor_id() to get ->cpu from current without including linux/sched.h to avoid circular inclusion and without including asm/asm-offsets.h to avoid symbol names duplication between ASM constants and C constants. - Modifies klp_init_thread_info() to take a task_struct pointer argument. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Add task_stack.h to livepatch.h to fix build fails] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-31 10:08:58 +00:00
1: mr r11, r8; \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
2: mfspr r8,SPRN_SPRG_RSCRATCH_##exc_level; \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
stw r12,GPR12(r11); /* save various registers */\
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mflr r10; \
stw r10,_LINK(r11); \
mfspr r12,SPRN_DEAR; /* save DEAR and ESR in the frame */\
stw r12,_DEAR(r11); /* since they may have had stuff */\
mfspr r9,SPRN_ESR; /* in them at the point where the */\
stw r9,_ESR(r11); /* exception was taken */\
mfspr r12,exc_level_srr0; \
stw r1,GPR1(r11); \
mfspr r9,exc_level_srr1; \
stw r1,0(r11); \
mr r1,r11; \
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
stw r0,GPR0(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#define CRITICAL_EXCEPTION_PROLOG(intno) \
EXC_LEVEL_EXCEPTION_PROLOG(CRIT, intno, SPRN_CSRR0, SPRN_CSRR1)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define DEBUG_EXCEPTION_PROLOG \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
EXC_LEVEL_EXCEPTION_PROLOG(DBG, DEBUG, SPRN_DSRR0, SPRN_DSRR1)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define MCHECK_EXCEPTION_PROLOG \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
EXC_LEVEL_EXCEPTION_PROLOG(MC, MACHINE_CHECK, \
SPRN_MCSRR0, SPRN_MCSRR1)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
KVM: PPC: booke: category E.HV (GS-mode) support Chips such as e500mc that implement category E.HV in Power ISA 2.06 provide hardware virtualization features, including a new MSR mode for guest state. The guest OS can perform many operations without trapping into the hypervisor, including transitions to and from guest userspace. Since we can use SRR1[GS] to reliably tell whether an exception came from guest state, instead of messing around with IVPR, we use DO_KVM similarly to book3s. Current issues include: - Machine checks from guest state are not routed to the host handler. - The guest can cause a host oops by executing an emulated instruction in a page that lacks read permission. Existing e500/4xx support has the same problem. Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>, Varun Sethi <Varun.Sethi@freescale.com>, and Liu Yu <yu.liu@freescale.com>. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: remove pt_regs usage] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:43 +00:00
/*
* Guest Doorbell -- this is a bit odd in that uses GSRR0/1 despite
* being delivered to the host. This exception can only happen
* inside a KVM guest -- so we just handle up to the DO_KVM rather
* than try to fit this into one of the existing prolog macros.
*/
#define GUEST_DOORBELL_EXCEPTION \
START_EXCEPTION(GuestDoorbell); \
mtspr SPRN_SPRG_WSCRATCH0, r10; /* save one register */ \
mfspr r10, SPRN_SPRG_THREAD; \
stw r11, THREAD_NORMSAVE(0)(r10); \
mfspr r11, SPRN_SRR1; \
stw r13, THREAD_NORMSAVE(2)(r10); \
mfcr r13; /* save CR in r13 for now */\
DO_KVM BOOKE_INTERRUPT_GUEST_DBELL SPRN_GSRR1; \
trap
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
/*
* Exception vectors.
*/
#define START_EXCEPTION(label) \
.align 5; \
label:
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#define EXCEPTION(n, intno, label, hdlr, xfer) \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
START_EXCEPTION(label); \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(intno); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
#define CRITICAL_EXCEPTION(n, intno, label, hdlr) \
START_EXCEPTION(label); \
CRITICAL_EXCEPTION_PROLOG(intno); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
EXC_XFER_TEMPLATE(hdlr, n+2, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
crit_transfer_to_handler, ret_from_crit_exc)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define MCHECK_EXCEPTION(n, label, hdlr) \
START_EXCEPTION(label); \
MCHECK_EXCEPTION_PROLOG; \
mfspr r5,SPRN_ESR; \
stw r5,_ESR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
[POWERPC] Reworking machine check handling and Fix 440/440A This adds a cputable function pointer for the CPU-side machine check handling. The semantic is still the same as the old one, the one in ppc_md. overrides the one in cputable, though ultimately we'll want to change that so the CPU gets first. This removes CONFIG_440A which was a problem for multiplatform kernels and instead fixes up the IVOR at runtime from a setup_cpu function. The "A" version of the machine check also tweaks the regs->trap value to differenciate the 2 versions at the C level. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-12-21 04:39:21 +00:00
EXC_XFER_TEMPLATE(hdlr, n+4, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
mcheck_transfer_to_handler, ret_from_mcheck_exc)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
#define EXC_XFER_TEMPLATE(hdlr, trap, msr, tfer, ret) \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
li r10,trap; \
stw r10,_TRAP(r11); \
lis r10,msr@h; \
ori r10,r10,msr@l; \
bl tfer; \
.long hdlr; \
.long ret
#define EXC_XFER_STD(n, hdlr) \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, transfer_to_handler_full, \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, transfer_to_handler, \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
ret_from_except)
/* Check for a single step debug exception while in an exception
* handler before state has been saved. This is to catch the case
* where an instruction that we are trying to single step causes
* an exception (eg ITLB/DTLB miss) and thus the first instruction of
* the exception handler generates a single step debug exception.
*
* If we get a debug trap on the first instruction of an exception handler,
* we reset the MSR_DE in the _exception handler's_ MSR (the debug trap is
* a critical exception, so we are using SPRN_CSRR1 to manipulate the MSR).
* The exception handler was handling a non-critical interrupt, so it will
* save (and later restore) the MSR via SPRN_CSRR1, which will still have
* the MSR_DE bit set.
*/
[POWERPC] Rework Book-E debug exception handling The architecture allows for "Book-E" style debug interrupts to either go to critial interrupts of their own debug interrupt level. To allow for a dynamic kernel to support machines of either type we want to be able to compile in the interrupt handling code for both exception levels. Towards this goal we renamed the debug handling macros to specify the interrupt level in their name (DEBUG_CRIT_EXCEPTION/DebugCrit and DEBUG_DEBUG_EXCEPTION/DebugDebug). Additionally, on the Freescale Book-e parts we expanded the exception stacks to cover the maximum case of needing three exception stacks (normal, machine check and debug). There is some kernel text space optimization to be gained if a kernel is configured for a specific Freescale implementation but we aren't handling that now to allow for the single kernel image support. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-04-09 11:06:11 +00:00
#define DEBUG_DEBUG_EXCEPTION \
START_EXCEPTION(DebugDebug); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
DEBUG_EXCEPTION_PROLOG; \
\
/* \
* If there is a single step or branch-taken exception in an \
* exception entry sequence, it was probably meant to apply to \
* the code where the exception occurred (since exception entry \
* doesn't turn off DE automatically). We simulate the effect \
* of turning off DE on entry to an exception handler by turning \
powerpc/booke: Fix some comments related to debug level exceptions Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-11 18:07:26 +00:00
* off DE in the DSRR1 value and clearing the debug status. \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
*/ \
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
powerpc: Add PTRACE_SINGLEBLOCK support Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org> This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK request for ptrace. The BookE implementation is tweaked to fire a single step after a block step in order to mimmic the server behaviour. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-05-28 21:26:38 +00:00
andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
beq+ 2f; \
\
powerpc: Fix interrupt range check on debug exception We do not want to take single step and branch-taken debug exception in kernel exception code. But the address range check was not covering all kernel exception handlers address range. With this patch we defined the interrupt_end label which defines the end on kernel exception code. So now we check interrupt_base to interrupt_end range for not handling debug exception in kernel exception entry. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29 22:18:11 +00:00
lis r10,interrupt_base@h; /* check if exception in vectors */ \
ori r10,r10,interrupt_base@l; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
cmplw r12,r10; \
blt+ 2f; /* addr below exception vectors */ \
\
powerpc: Fix interrupt range check on debug exception We do not want to take single step and branch-taken debug exception in kernel exception code. But the address range check was not covering all kernel exception handlers address range. With this patch we defined the interrupt_end label which defines the end on kernel exception code. So now we check interrupt_base to interrupt_end range for not handling debug exception in kernel exception entry. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29 22:18:11 +00:00
lis r10,interrupt_end@h; \
ori r10,r10,interrupt_end@l; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
cmplw r12,r10; \
bgt+ 2f; /* addr above exception vectors */ \
\
/* here it looks like we got an inappropriate debug exception. */ \
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \
powerpc: Add PTRACE_SINGLEBLOCK support Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org> This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK request for ptrace. The BookE implementation is tweaked to fire a single step after a block step in order to mimmic the server behaviour. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-05-28 21:26:38 +00:00
lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mtspr SPRN_DBSR,r10; \
/* restore state and get out */ \
lwz r10,_CCR(r11); \
lwz r0,GPR0(r11); \
lwz r1,GPR1(r11); \
mtcrf 0x80,r10; \
mtspr SPRN_DSRR0,r12; \
mtspr SPRN_DSRR1,r9; \
lwz r9,GPR9(r11); \
lwz r12,GPR12(r11); \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mtspr SPRN_SPRG_WSCRATCH_DBG,r8; \
BOOKE_LOAD_EXC_LEVEL_STACK(DBG); /* r8 points to the debug stack */ \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
lwz r10,GPR10(r8); \
lwz r11,GPR11(r8); \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mfspr r8,SPRN_SPRG_RSCRATCH_DBG; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
\
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
PPC_RFDI; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
b .; \
\
powerpc/booke: Fix some comments related to debug level exceptions Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-11 18:07:26 +00:00
/* continue normal handling for a debug exception... */ \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), debug_transfer_to_handler, ret_from_debug_exc)
[POWERPC] Rework Book-E debug exception handling The architecture allows for "Book-E" style debug interrupts to either go to critial interrupts of their own debug interrupt level. To allow for a dynamic kernel to support machines of either type we want to be able to compile in the interrupt handling code for both exception levels. Towards this goal we renamed the debug handling macros to specify the interrupt level in their name (DEBUG_CRIT_EXCEPTION/DebugCrit and DEBUG_DEBUG_EXCEPTION/DebugDebug). Additionally, on the Freescale Book-e parts we expanded the exception stacks to cover the maximum case of needing three exception stacks (normal, machine check and debug). There is some kernel text space optimization to be gained if a kernel is configured for a specific Freescale implementation but we aren't handling that now to allow for the single kernel image support. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-04-09 11:06:11 +00:00
#define DEBUG_CRIT_EXCEPTION \
START_EXCEPTION(DebugCrit); \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
CRITICAL_EXCEPTION_PROLOG(DEBUG); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
\
/* \
* If there is a single step or branch-taken exception in an \
* exception entry sequence, it was probably meant to apply to \
* the code where the exception occurred (since exception entry \
* doesn't turn off DE automatically). We simulate the effect \
* of turning off DE on entry to an exception handler by turning \
* off DE in the CSRR1 value and clearing the debug status. \
*/ \
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
powerpc: Add PTRACE_SINGLEBLOCK support Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org> This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK request for ptrace. The BookE implementation is tweaked to fire a single step after a block step in order to mimmic the server behaviour. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-05-28 21:26:38 +00:00
andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
beq+ 2f; \
\
powerpc: Fix interrupt range check on debug exception We do not want to take single step and branch-taken debug exception in kernel exception code. But the address range check was not covering all kernel exception handlers address range. With this patch we defined the interrupt_end label which defines the end on kernel exception code. So now we check interrupt_base to interrupt_end range for not handling debug exception in kernel exception entry. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29 22:18:11 +00:00
lis r10,interrupt_base@h; /* check if exception in vectors */ \
ori r10,r10,interrupt_base@l; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
cmplw r12,r10; \
blt+ 2f; /* addr below exception vectors */ \
\
powerpc: Fix interrupt range check on debug exception We do not want to take single step and branch-taken debug exception in kernel exception code. But the address range check was not covering all kernel exception handlers address range. With this patch we defined the interrupt_end label which defines the end on kernel exception code. So now we check interrupt_base to interrupt_end range for not handling debug exception in kernel exception entry. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29 22:18:11 +00:00
lis r10,interrupt_end@h; \
ori r10,r10,interrupt_end@l; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
cmplw r12,r10; \
bgt+ 2f; /* addr above exception vectors */ \
\
/* here it looks like we got an inappropriate debug exception. */ \
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \
powerpc: Add PTRACE_SINGLEBLOCK support Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org> This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK request for ptrace. The BookE implementation is tweaked to fire a single step after a block step in order to mimmic the server behaviour. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-05-28 21:26:38 +00:00
lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mtspr SPRN_DBSR,r10; \
/* restore state and get out */ \
lwz r10,_CCR(r11); \
lwz r0,GPR0(r11); \
lwz r1,GPR1(r11); \
mtcrf 0x80,r10; \
mtspr SPRN_CSRR0,r12; \
mtspr SPRN_CSRR1,r9; \
lwz r9,GPR9(r11); \
lwz r12,GPR12(r11); \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mtspr SPRN_SPRG_WSCRATCH_CRIT,r8; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \
[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG code * Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 09:17:22 +00:00
lwz r10,GPR10(r8); \
lwz r11,GPR11(r8); \
powerpc: Use names rather than numbers for SPRGs (v2) The kernel uses SPRG registers for various purposes, typically in low level assembly code as scratch registers or to hold per-cpu global infos such as the PACA or the current thread_info pointer. We want to be able to easily shuffle the usage of those registers as some implementations have specific constraints realted to some of them, for example, some have userspace readable aliases, etc.. and the current choice isn't always the best. This patch should not change any code generation, and replaces the usage of SPRN_SPRGn everywhere in the kernel with a named replacement and adds documentation next to the definition of the names as to what those are used for on each processor family. The only parts that still use the original numbers are bits of KVM or suspend/resume code that just blindly needs to save/restore all the SPRGs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-07-14 20:52:54 +00:00
mfspr r8,SPRN_SPRG_RSCRATCH_CRIT; \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
\
rfci; \
b .; \
\
/* continue normal handling for a critical exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
powerpc/32: get rid of COPY_EE in exception entry EXC_XFER_TEMPLATE() is not called with COPY_EE anymore so we can get rid of copyee parameters and related COPY_EE and NOCOPY macros. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:00 +00:00
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), crit_transfer_to_handler, ret_from_crit_exc)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
powerpc: rework 4xx PTE access and TLB miss This is some preliminary work to improve TLB management on SW loaded TLB powerpc platforms. This introduce support for non-atomic PTE operations in pgtable-ppc32.h and removes write back to the PTE from the TLB miss handlers. In addition, the DSI interrupt code no longer tries to fixup write permission, this is left to generic code, and _PAGE_HWWRITE is gone. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-07-08 05:54:40 +00:00
#define DATA_STORAGE_EXCEPTION \
START_EXCEPTION(DataStorage) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(DATA_STORAGE); \
powerpc: rework 4xx PTE access and TLB miss This is some preliminary work to improve TLB management on SW loaded TLB powerpc platforms. This introduce support for non-atomic PTE operations in pgtable-ppc32.h and removes write back to the PTE from the TLB miss handlers. In addition, the DSI interrupt code no longer tries to fixup write permission, this is left to generic code, and _PAGE_HWWRITE is gone. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-07-08 05:54:40 +00:00
mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \
stw r5,_ESR(r11); \
mfspr r4,SPRN_DEAR; /* Grab the DEAR */ \
powerpc/32: save DEAR/DAR before calling handle_page_fault handle_page_fault() is the only function that save DAR/DEAR itself. Save DAR/DEAR before calling handle_page_fault() to prepare for VMAP stack which will require to save even before. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/3a4d58d378091086f00fde42b59610c80289e120.1576916812.git.christophe.leroy@c-s.fr
2019-12-21 08:32:24 +00:00
stw r4, _DEAR(r11); \
powerpc: Call do_page_fault() with interrupts off We currently turn interrupts back to their previous state before calling do_page_fault(). This can be annoying when debugging as a bad fault will potentially have lost some processor state before getting into the debugger. We also end up calling some generic code with interrupts enabled such as notify_page_fault() with interrupts enabled, which could be unexpected. This changes our code to behave more like other architectures, and make the assembly entry code call into do_page_faults() with interrupts disabled. They are conditionally re-enabled from within do_page_fault() in the same spot x86 does it. While there, add the might_sleep() test in the case of a successful trylock of the mmap semaphore, again like x86. Also fix a bug in the existing assembly where r12 (_MSR) could get clobbered by C calls (the DTL accounting in the exception common macro and DISABLE_INTS) in some cases. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- v2. Add the r12 clobber fix
2012-03-07 05:48:45 +00:00
EXC_XFER_LITE(0x0300, handle_page_fault)
powerpc: rework 4xx PTE access and TLB miss This is some preliminary work to improve TLB management on SW loaded TLB powerpc platforms. This introduce support for non-atomic PTE operations in pgtable-ppc32.h and removes write back to the PTE from the TLB miss handlers. In addition, the DSI interrupt code no longer tries to fixup write permission, this is left to generic code, and _PAGE_HWWRITE is gone. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-07-08 05:54:40 +00:00
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define INSTRUCTION_STORAGE_EXCEPTION \
START_EXCEPTION(InstructionStorage) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(INST_STORAGE); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \
stw r5,_ESR(r11); \
mr r4,r12; /* Pass SRR0 as arg2 */ \
powerpc/32: save DEAR/DAR before calling handle_page_fault handle_page_fault() is the only function that save DAR/DEAR itself. Save DAR/DEAR before calling handle_page_fault() to prepare for VMAP stack which will require to save even before. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/3a4d58d378091086f00fde42b59610c80289e120.1576916812.git.christophe.leroy@c-s.fr
2019-12-21 08:32:24 +00:00
stw r4, _DEAR(r11); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
li r5,0; /* Pass zero as arg3 */ \
powerpc: Call do_page_fault() with interrupts off We currently turn interrupts back to their previous state before calling do_page_fault(). This can be annoying when debugging as a bad fault will potentially have lost some processor state before getting into the debugger. We also end up calling some generic code with interrupts enabled such as notify_page_fault() with interrupts enabled, which could be unexpected. This changes our code to behave more like other architectures, and make the assembly entry code call into do_page_faults() with interrupts disabled. They are conditionally re-enabled from within do_page_fault() in the same spot x86 does it. While there, add the might_sleep() test in the case of a successful trylock of the mmap semaphore, again like x86. Also fix a bug in the existing assembly where r12 (_MSR) could get clobbered by C calls (the DTL accounting in the exception common macro and DISABLE_INTS) in some cases. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- v2. Add the r12 clobber fix
2012-03-07 05:48:45 +00:00
EXC_XFER_LITE(0x0400, handle_page_fault)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define ALIGNMENT_EXCEPTION \
START_EXCEPTION(Alignment) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(ALIGNMENT); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mfspr r4,SPRN_DEAR; /* Grab the DEAR and save it */ \
stw r4,_DEAR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
powerpc/32: Enter exceptions with MSR_EE unset All exceptions handlers know when to reenable interrupts, so it is safer to enter all of them with MSR_EE unset, except for syscalls. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:38:59 +00:00
EXC_XFER_STD(0x0600, alignment_exception)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#define PROGRAM_EXCEPTION \
START_EXCEPTION(Program) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(PROGRAM); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
mfspr r4,SPRN_ESR; /* Grab the ESR and save it */ \
stw r4,_ESR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_STD(0x0700, program_check_exception)
#define DECREMENTER_EXCEPTION \
START_EXCEPTION(Decrementer) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(DECREMENTER); \
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
lis r0,TSR_DIS@h; /* Setup the DEC interrupt mask */ \
mtspr SPRN_TSR,r0; /* Clear the DEC interrupt */ \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_LITE(0x0900, timer_interrupt)
#define FP_UNAVAILABLE_EXCEPTION \
START_EXCEPTION(FloatingPointUnavailable) \
powerpc/booke: Provide exception macros with interrupt name DO_KVM will need to identify the particular exception type. There is an existing set of arbitrary numbers that Linux passes, but it's an undocumented mess that sort of corresponds to server/classic exception vectors but not really. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-20 15:34:40 +00:00
NORMAL_EXCEPTION_PROLOG(FP_UNAVAIL); \
powerpc: Make load_up_fpu and load_up_altivec callable Make load_up_fpu and load_up_altivec callable so they can be reused by the VSX code. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-25 04:07:18 +00:00
beq 1f; \
bl load_up_fpu; /* if from user, just load it up */ \
b fast_exception_return; \
1: addi r3,r1,STACK_FRAME_OVERHEAD; \
powerpc/32: Enter exceptions with MSR_EE unset All exceptions handlers know when to reenable interrupts, so it is safer to enter all of them with MSR_EE unset, except for syscalls. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [splited out from benh RFC patch] Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:38:59 +00:00
EXC_XFER_STD(0x800, kernel_fp_unavailable_exception)
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
powerpc/32: implement fast entry for syscalls on BOOKE This patch implements a fast entry for syscalls. Syscalls don't have to preserve non volatile registers except LR. This patch then implement a fast entry for syscalls, where volatile registers get clobbered. As this entry is dedicated to syscall it always sets MSR_EE and warns in case MSR_EE was previously off It also assumes that the call is always from user, system calls are unexpected from kernel. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-04-30 12:39:03 +00:00
#else /* __ASSEMBLY__ */
[POWERPC] 40x/Book-E: Save/restore volatile exception registers On machines with more than one exception level any system register that might be modified by the "normal" exception level needs to be saved and restored on taking a higher level exception. We already are saving and restoring ESR and DEAR. For critical level add SRR0/1. For debug level add CSRR0/1 and SRR0/1. For machine check level add DSRR0/1, CSRR0/1, and SRR0/1. On FSL Book-E parts we always save/restore the MAS registers for critical, debug, and machine check level exceptions. On 44x we always save/restore the MMUCR. Additionally, we save and restore the ksp_limit since we have to adjust it for each exception level. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-04-30 10:23:21 +00:00
struct exception_regs {
unsigned long mas0;
unsigned long mas1;
unsigned long mas2;
unsigned long mas3;
unsigned long mas6;
unsigned long mas7;
unsigned long srr0;
unsigned long srr1;
unsigned long csrr0;
unsigned long csrr1;
unsigned long dsrr0;
unsigned long dsrr1;
unsigned long saved_ksp_limit;
};
/* ensure this structure is always sized to a multiple of the stack alignment */
#define STACK_EXC_LVL_FRAME_SIZE _ALIGN_UP(sizeof (struct exception_regs), 16)
#endif /* __ASSEMBLY__ */
[PATCH] powerpc: Updated Initial MPC8540 ADS port with OF Flat Dev Updated patch for support for mpc8540_ads in arch/powerpc with a flat OF device tree. This patch does not yet support PCI or I2C. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-14 22:57:39 +00:00
#endif /* __HEAD_BOOKE_H__ */
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