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linux/arch/mips/dec/int-handler.S

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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 */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* Copyright (C) 1995, 1996, 1997 Paul M. Antoine and Harald Koerfgen
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
* Copyright (C) 2000, 2001, 2002, 2003, 2005 Maciej W. Rozycki
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
* Written by Ralf Baechle and Andreas Busse, modified for DECstation
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
* support by Paul Antoine and Harald Koerfgen.
*
MIPS: Fix misspellings in comments. Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12617/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-02-25 08:44:58 +00:00
* completely rewritten:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
* Copyright (C) 1998 Harald Koerfgen
*
* Rewritten extensively for controller-driven IRQ support
* by Maciej W. Rozycki.
*/
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
#include <asm/addrspace.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#include <asm/asm.h>
#include <asm/mipsregs.h>
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
#include <asm/regdef.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#include <asm/stackframe.h>
#include <asm/dec/interrupts.h>
#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/ioasic_ints.h>
#include <asm/dec/kn01.h>
#include <asm/dec/kn02.h>
#include <asm/dec/kn02xa.h>
#include <asm/dec/kn03.h>
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
#define KN02_CSR_BASE CKSEG1ADDR(KN02_SLOT_BASE + KN02_CSR)
#define KN02XA_IOASIC_BASE CKSEG1ADDR(KN02XA_SLOT_BASE + IOASIC_IOCTL)
#define KN03_IOASIC_BASE CKSEG1ADDR(KN03_SLOT_BASE + IOASIC_IOCTL)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.text
.set noreorder
/*
[MIPS] Rewrite all the assembler interrupt handlers to C. Saves like 1,600 lines of code, is way easier to debug, compilers frequently do a better job than the cut and paste type of handlers many boards had. And finally having all the stuff done in a single place also means alot of bug potencial for the MT ASE is gone. The only surviving handler in assembler is the DECstation one; I hope Maciej will rewrite it. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-03 16:56:36 +00:00
* plat_irq_dispatch: Interrupt handler for DECstations
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* We follow the model in the Indy interrupt code by David Miller, where he
* says: a lot of complication here is taken away because:
*
* 1) We handle one interrupt and return, sitting in a loop
* and moving across all the pending IRQ bits in the cause
* register is _NOT_ the answer, the common case is one
* pending IRQ so optimize in that direction.
*
* 2) We need not check against bits in the status register
* IRQ mask, that would make this routine slow as hell.
*
* 3) Linux only thinks in terms of all IRQs on or all IRQs
* off, nothing in between like BSD spl() brain-damage.
*
Use physical addresses at the interface level, letting drivers remap them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-07-01 16:10:40 +00:00
* Furthermore, the IRQs on the DECstations look basically (barring
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
* software IRQs which we don't use at all) like...
*
* DS2100/3100's, aka kn01, aka Pmax:
*
* MIPS IRQ Source
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 11:59:30 +00:00
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 SCSI
* 3 Lance Ethernet
* 4 DZ11 serial
* 5 RTC
* 6 Memory Controller & Video
* 7 FPU
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* DS5000/200, aka kn02, aka 3max:
*
* MIPS IRQ Source
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 11:59:30 +00:00
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 TurboChannel
* 3 RTC
* 4 Reserved
* 5 Memory Controller
* 6 Reserved
* 7 FPU
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* DS5000/1xx's, aka kn02ba, aka 3min:
*
* MIPS IRQ Source
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 11:59:30 +00:00
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 TurboChannel Slot 0
* 3 TurboChannel Slot 1
* 4 TurboChannel Slot 2
* 5 TurboChannel Slot 3 (ASIC)
* 6 Halt button
* 7 FPU/R4k timer
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* DS5000/2x's, aka kn02ca, aka maxine:
*
* MIPS IRQ Source
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 11:59:30 +00:00
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 Periodic Interrupt (100usec)
* 3 RTC
* 4 I/O write timeout
* 5 TurboChannel (ASIC)
* 6 Halt Keycode from Access.Bus keyboard (CTRL-ALT-ENTER)
* 7 FPU/R4k timer
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* DS5000/2xx's, aka kn03, aka 3maxplus:
*
* MIPS IRQ Source
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 11:59:30 +00:00
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 System Board (ASIC)
* 3 RTC
* 4 Reserved
* 5 Memory
* 6 Halt Button
* 7 FPU/R4k timer
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*
* We handle the IRQ according to _our_ priority (see setup.c),
DEC: Whitespace cleanup Commit 7034228792cc561e79ff8600f02884bd4c80e287 [MIPS: Whitespace cleanup.] did a lot of good and a little damage. Revert the damage. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5875/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-22 20:58:50 +00:00
* then we just return. If multiple IRQs are pending then we will
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
* just take another exception, big deal.
*/
.align 5
[MIPS] Rewrite all the assembler interrupt handlers to C. Saves like 1,600 lines of code, is way easier to debug, compilers frequently do a better job than the cut and paste type of handlers many boards had. And finally having all the stuff done in a single place also means alot of bug potencial for the MT ASE is gone. The only surviving handler in assembler is the DECstation one; I hope Maciej will rewrite it. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-03 16:56:36 +00:00
NESTED(plat_irq_dispatch, PT_SIZE, ra)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
.set noreorder
/*
* Get pending Interrupts
*/
mfc0 t0,CP0_CAUSE # get pending interrupts
mfc0 t1,CP0_STATUS
[PATCH] mips: clean up 32/64-bit configuration Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-03 22:56:16 +00:00
#ifdef CONFIG_32BIT
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
lw t2,cpu_fpu_mask
#endif
andi t0,ST0_IM # CAUSE.CE may be non-zero!
and t0,t1 # isolate allowed ones
beqz t0,spurious
[PATCH] mips: clean up 32/64-bit configuration Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-03 22:56:16 +00:00
#ifdef CONFIG_32BIT
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
and t2,t0
bnez t2,fpu # handle FPU immediately
#endif
/*
* Find irq with highest priority
*/
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
# open coded PTR_LA t1, cpu_mask_nr_tbl
MIPS: DEC: Fix an int-handler.S CPU_DADDI_WORKAROUNDS regression Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") regression and remove assembly errors: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat" triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU instruction. This is because with that option in place the instruction becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU) sequence that uses $at as a temporary register. With CPU_DADDI_WORKAROUNDS we only support `-msym32' compilation though, and this is already enforced in arch/mips/Makefile, so choose the 32-bit expansion variant for the supported configurations and then replace the 64-bit variant with #error just in case. Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 4.8+ Patchwork: https://patchwork.linux-mips.org/patch/16893/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-07-30 20:28:15 +00:00
#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
# open coded la t1, cpu_mask_nr_tbl
lui t1, %hi(cpu_mask_nr_tbl)
addiu t1, %lo(cpu_mask_nr_tbl)
MIPS: DEC: Fix an int-handler.S CPU_DADDI_WORKAROUNDS regression Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") regression and remove assembly errors: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat" triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU instruction. This is because with that option in place the instruction becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU) sequence that uses $at as a temporary register. With CPU_DADDI_WORKAROUNDS we only support `-msym32' compilation though, and this is already enforced in arch/mips/Makefile, so choose the 32-bit expansion variant for the supported configurations and then replace the 64-bit variant with #error just in case. Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 4.8+ Patchwork: https://patchwork.linux-mips.org/patch/16893/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-07-30 20:28:15 +00:00
#else
#error GCC `-msym32' option required for 64-bit DECstation builds
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
1: lw t2,(t1)
nop
and t2,t0
beqz t2,1b
addu t1,2*PTRSIZE # delay slot
/*
* Do the low-level stuff
*/
lw a0,(-PTRSIZE)(t1)
nop
bgez a0,handle_it # irq_nr >= 0?
# irq_nr < 0: it is an address
nop
jr a0
# a trick to save a branch:
lui t2,(KN03_IOASIC_BASE>>16)&0xffff
# upper part of IOASIC Address
/*
* Handle "IRQ Controller" Interrupts
* Masked Interrupts are still visible and have to be masked "by hand".
*/
FEXPORT(kn02_io_int) # 3max
lui t0,(KN02_CSR_BASE>>16)&0xffff
# get interrupt status and mask
lw t0,(t0)
nop
andi t1,t0,KN02_IRQ_ALL
b 1f
srl t0,16 # shift interrupt mask
FEXPORT(kn02xa_io_int) # 3min/maxine
lui t2,(KN02XA_IOASIC_BASE>>16)&0xffff
# upper part of IOASIC Address
FEXPORT(kn03_io_int) # 3max+ (t2 loaded earlier)
lw t0,IO_REG_SIR(t2) # get status: IOASIC sir
lw t1,IO_REG_SIMR(t2) # get mask: IOASIC simr
nop
1: and t0,t1 # mask out allowed ones
beqz t0,spurious
/*
* Find irq with highest priority
*/
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
# open coded PTR_LA t1,asic_mask_nr_tbl
MIPS: DEC: Fix an int-handler.S CPU_DADDI_WORKAROUNDS regression Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") regression and remove assembly errors: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat" triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU instruction. This is because with that option in place the instruction becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU) sequence that uses $at as a temporary register. With CPU_DADDI_WORKAROUNDS we only support `-msym32' compilation though, and this is already enforced in arch/mips/Makefile, so choose the 32-bit expansion variant for the supported configurations and then replace the 64-bit variant with #error just in case. Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 4.8+ Patchwork: https://patchwork.linux-mips.org/patch/16893/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-07-30 20:28:15 +00:00
#if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32)
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
# open coded la t1, asic_mask_nr_tbl
lui t1, %hi(asic_mask_nr_tbl)
addiu t1, %lo(asic_mask_nr_tbl)
MIPS: DEC: Fix an int-handler.S CPU_DADDI_WORKAROUNDS regression Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") regression and remove assembly errors: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat" triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU instruction. This is because with that option in place the instruction becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU) sequence that uses $at as a temporary register. With CPU_DADDI_WORKAROUNDS we only support `-msym32' compilation though, and this is already enforced in arch/mips/Makefile, so choose the 32-bit expansion variant for the supported configurations and then replace the 64-bit variant with #error just in case. Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org # 4.8+ Patchwork: https://patchwork.linux-mips.org/patch/16893/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-07-30 20:28:15 +00:00
#else
#error GCC `-msym32' option required for 64-bit DECstation builds
MIPS: DEC: Avoid la pseudo-instruction in delay slots When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-09-20 12:33:01 +00:00
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
2: lw t2,(t1)
nop
and t2,t0
beq zero,t2,2b
addu t1,2*PTRSIZE # delay slot
/*
* Do the low-level stuff
*/
lw a0,%lo(-PTRSIZE)(t1)
nop
bgez a0,handle_it # irq_nr >= 0?
# irq_nr < 0: it is an address
nop
jr a0
nop # delay slot
/*
* Dispatch low-priority interrupts. We reconsider all status
* bits again, which looks like a lose, but it makes the code
* simple and O(log n), so it gets compensated.
*/
FEXPORT(cpu_all_int) # HALT, timers, software junk
li a0,DEC_CPU_IRQ_BASE
srl t0,CAUSEB_IP
DEC: Whitespace cleanup Commit 7034228792cc561e79ff8600f02884bd4c80e287 [MIPS: Whitespace cleanup.] did a lot of good and a little damage. Revert the damage. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5875/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-22 20:58:50 +00:00
li t1,CAUSEF_IP>>CAUSEB_IP # mask
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
b 1f
li t2,4 # nr of bits / 2
FEXPORT(kn02_all_int) # impossible ?
li a0,KN02_IRQ_BASE
li t1,KN02_IRQ_ALL # mask
b 1f
li t2,4 # nr of bits / 2
FEXPORT(asic_all_int) # various I/O ASIC junk
li a0,IO_IRQ_BASE
li t1,IO_IRQ_ALL # mask
b 1f
li t2,8 # nr of bits / 2
/*
* Dispatch DMA interrupts -- O(log n).
*/
FEXPORT(asic_dma_int) # I/O ASIC DMA events
li a0,IO_IRQ_BASE+IO_INR_DMA
srl t0,IO_INR_DMA
li t1,IO_IRQ_DMA>>IO_INR_DMA # mask
li t2,8 # nr of bits / 2
/*
* Find irq with highest priority.
* Highest irq number takes precedence.
*/
1: srlv t3,t1,t2
2: xor t1,t3
and t3,t0,t1
beqz t3,3f
nop
move t0,t3
addu a0,t2
3: srl t2,1
bnez t2,2b
srlv t3,t1,t2
handle_it:
[MIPS] do_IRQ cleanup Now we have both function and macro version of do_IRQ() and the former is used only by DEC and non-preemptive kernel. This patch makes everyone use the macro version and removes the function version. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-25 14:57:04 +00:00
j dec_irq_dispatch
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
nop
[PATCH] mips: clean up 32/64-bit configuration Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-03 22:56:16 +00:00
#ifdef CONFIG_32BIT
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
fpu:
MIPS: DEC: Implement FPU interrupt counter Implement a cheap way to count FPU interrupts for R2k/R3k DECstation systems. Do this manually in handcoded assembly, rather than calling `kstat_incr_irq_this_cpu' that would require setting up a stack frame and a lot of redirection. This is not going to be a problem because the FPU interrupt is local to the CPU and also there is one CPU only anyway. So at bootstrap determine the address of the correct location within `struct irq_desc', and then only refer to it directly in the interrupt handler. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9713/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-04-03 22:32:08 +00:00
lw t0,fpu_kstat_irq
nop
lw t1,(t0)
nop
addu t1,1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
j handle_fpe_int
MIPS: DEC: Implement FPU interrupt counter Implement a cheap way to count FPU interrupts for R2k/R3k DECstation systems. Do this manually in handcoded assembly, rather than calling `kstat_incr_irq_this_cpu' that would require setting up a stack frame and a lot of redirection. This is not going to be a problem because the FPU interrupt is local to the CPU and also there is one CPU only anyway. So at bootstrap determine the address of the correct location within `struct irq_desc', and then only refer to it directly in the interrupt handler. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9713/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-04-03 22:32:08 +00:00
sw t1,(t0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#endif
spurious:
[MIPS] ret_from_irq adjustment Make sure that RA on top of interrupt stack is an address of ret_from_irq, so that dump_stack etc. can trace info interrupted context. Also this patch fixes except_vec_vi_handler and __smtc_ipi_vector which seems broken. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-08 16:24:23 +00:00
j spurious_interrupt
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
nop
[MIPS] Rewrite all the assembler interrupt handlers to C. Saves like 1,600 lines of code, is way easier to debug, compilers frequently do a better job than the cut and paste type of handlers many boards had. And finally having all the stuff done in a single place also means alot of bug potencial for the MT ASE is gone. The only surviving handler in assembler is the DECstation one; I hope Maciej will rewrite it. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-03 16:56:36 +00:00
END(plat_irq_dispatch)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* Generic unimplemented interrupt routines -- cpu_mask_nr_tbl
* and asic_mask_nr_tbl are initialized to point all interrupts here.
* The tables are then filled in by machine-specific initialisation
* in dec_setup().
*/
FEXPORT(dec_intr_unimplemented)
move a1,t0 # cheats way of printing an arg!
PANIC("Unimplemented cpu interrupt! CP0_CAUSE: 0x%08x");
FEXPORT(asic_intr_unimplemented)
move a1,t0 # cheats way of printing an arg!
PANIC("Unimplemented asic interrupt! ASIC ISR: 0x%08x");
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