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linux/arch/microblaze/kernel/process.c
Mike Rapoport ca15ca406f mm: remove unneeded includes of <asm/pgalloc.h> 
Patch series "mm: cleanup usage of <asm/pgalloc.h>"

Most architectures have very similar versions of pXd_alloc_one() and
pXd_free_one() for intermediate levels of page table.  These patches add
generic versions of these functions in <asm-generic/pgalloc.h> and enable
use of the generic functions where appropriate.

In addition, functions declared and defined in <asm/pgalloc.h> headers are
used mostly by core mm and early mm initialization in arch and there is no
actual reason to have the <asm/pgalloc.h> included all over the place.
The first patch in this series removes unneeded includes of
<asm/pgalloc.h>

In the end it didn't work out as neatly as I hoped and moving
pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require
unnecessary changes to arches that have custom page table allocations, so
I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local
to mm/.

This patch (of 8):

In most cases <asm/pgalloc.h> header is required only for allocations of
page table memory.  Most of the .c files that include that header do not
use symbols declared in <asm/pgalloc.h> and do not require that header.

As for the other header files that used to include <asm/pgalloc.h>, it is
possible to move that include into the .c file that actually uses symbols
from <asm/pgalloc.h> and drop the include from the header file.

The process was somewhat automated using

	sed -i -E '/[<"]asm\/pgalloc\.h/d' \
                $(grep -L -w -f /tmp/xx \
                        $(git grep -E -l '[<"]asm/pgalloc\.h'))

where /tmp/xx contains all the symbols defined in
arch/*/include/asm/pgalloc.h.

[rppt@linux.ibm.com: fix powerpc warning]

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200627143453.31835-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:26 -07:00

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/*
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/cpu.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task.h>
#include <linux/sched/task_stack.h>
#include <linux/pm.h>
#include <linux/tick.h>
#include <linux/bitops.h>
#include <linux/ptrace.h>
#include <linux/uaccess.h> /* for USER_DS macros */
#include <asm/cacheflush.h>
void show_regs(struct pt_regs *regs)
{
show_regs_print_info(KERN_INFO);
pr_info(" Registers dump: mode=%X\r\n", regs->pt_mode);
pr_info(" r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n",
regs->r1, regs->r2, regs->r3, regs->r4);
pr_info(" r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n",
regs->r5, regs->r6, regs->r7, regs->r8);
pr_info(" r9=%08lX, r10=%08lX, r11=%08lX, r12=%08lX\n",
regs->r9, regs->r10, regs->r11, regs->r12);
pr_info(" r13=%08lX, r14=%08lX, r15=%08lX, r16=%08lX\n",
regs->r13, regs->r14, regs->r15, regs->r16);
pr_info(" r17=%08lX, r18=%08lX, r19=%08lX, r20=%08lX\n",
regs->r17, regs->r18, regs->r19, regs->r20);
pr_info(" r21=%08lX, r22=%08lX, r23=%08lX, r24=%08lX\n",
regs->r21, regs->r22, regs->r23, regs->r24);
pr_info(" r25=%08lX, r26=%08lX, r27=%08lX, r28=%08lX\n",
regs->r25, regs->r26, regs->r27, regs->r28);
pr_info(" r29=%08lX, r30=%08lX, r31=%08lX, rPC=%08lX\n",
regs->r29, regs->r30, regs->r31, regs->pc);
pr_info(" msr=%08lX, ear=%08lX, esr=%08lX, fsr=%08lX\n",
regs->msr, regs->ear, regs->esr, regs->fsr);
}
void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
void flush_thread(void)
{
}
int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
struct task_struct *p, unsigned long tls)
{
struct pt_regs *childregs = task_pt_regs(p);
struct thread_info *ti = task_thread_info(p);
if (unlikely(p->flags & PF_KTHREAD)) {
/* if we're creating a new kernel thread then just zeroing all
* the registers. That's OK for a brand new thread.*/
memset(childregs, 0, sizeof(struct pt_regs));
memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
ti->cpu_context.r1 = (unsigned long)childregs;
ti->cpu_context.r20 = (unsigned long)usp; /* fn */
ti->cpu_context.r19 = (unsigned long)arg;
childregs->pt_mode = 1;
local_save_flags(childregs->msr);
#ifdef CONFIG_MMU
ti->cpu_context.msr = childregs->msr & ~MSR_IE;
#endif
ti->cpu_context.r15 = (unsigned long)ret_from_kernel_thread - 8;
return 0;
}
*childregs = *current_pt_regs();
if (usp)
childregs->r1 = usp;
memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
ti->cpu_context.r1 = (unsigned long)childregs;
#ifndef CONFIG_MMU
ti->cpu_context.msr = (unsigned long)childregs->msr;
#else
childregs->msr |= MSR_UMS;
/* we should consider the fact that childregs is a copy of the parent
* regs which were saved immediately after entering the kernel state
* before enabling VM. This MSR will be restored in switch_to and
* RETURN() and we want to have the right machine state there
* specifically this state must have INTs disabled before and enabled
* after performing rtbd
* compose the right MSR for RETURN(). It will work for switch_to also
* excepting for VM and UMS
* don't touch UMS , CARRY and cache bits
* right now MSR is a copy of parent one */
childregs->msr &= ~MSR_EIP;
childregs->msr |= MSR_IE;
childregs->msr &= ~MSR_VM;
childregs->msr |= MSR_VMS;
childregs->msr |= MSR_EE; /* exceptions will be enabled*/
ti->cpu_context.msr = (childregs->msr|MSR_VM);
ti->cpu_context.msr &= ~MSR_UMS; /* switch_to to kernel mode */
ti->cpu_context.msr &= ~MSR_IE;
#endif
ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8;
/*
* r21 is the thread reg, r10 is 6th arg to clone
* which contains TLS area
*/
if (clone_flags & CLONE_SETTLS)
childregs->r21 = tls;
return 0;
}
unsigned long get_wchan(struct task_struct *p)
{
/* TBD (used by procfs) */
return 0;
}
/* Set up a thread for executing a new program */
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
{
regs->pc = pc;
regs->r1 = usp;
regs->pt_mode = 0;
#ifdef CONFIG_MMU
regs->msr |= MSR_UMS;
regs->msr &= ~MSR_VM;
#endif
}
#ifdef CONFIG_MMU
#include <linux/elfcore.h>
/*
* Set up a thread for executing a new program
*/
int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
{
return 0; /* MicroBlaze has no separate FPU registers */
}
#endif /* CONFIG_MMU */
void arch_cpu_idle(void)
{
local_irq_enable();
}
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