+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* arch/arm/include/asm/cacheflush.h
*
* Copyright (C) 1999-2002 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#ifndef _ASMARM_CACHEFLUSH_H
#define _ASMARM_CACHEFLUSH_H
void flush_uprobe_xol_access(struct page *page, unsigned long uaddr,
void *kaddr, unsigned long len);
+
+ #ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
+ void check_cpu_icache_size(int cpuid);
+ #else
+ static inline void check_cpu_icache_size(int cpuid) { }
+ #endif
+
#endif
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/kernel/smp.c
*
* Copyright (C) 2002 ARM Limited, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/delay.h>
cpu_info->cpuid = read_cpuid_id();
store_cpu_topology(cpuid);
+ check_cpu_icache_size(cpuid);
}
/*
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/kernel/traps.c
*
* Copyright (C) 1995-2009 Russell King
* Fragments that appear the same as linux/arch/i386/kernel/traps.c (C) Linus Torvalds
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* 'traps.c' handles hardware exceptions after we have saved some state in
* 'linux/arch/arm/lib/traps.S'. Mostly a debugging aid, but will probably
* kill the offending process.
#ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_BADABORT) {
+ pr_err("8<--- cut here ---\n");
pr_err("[%d] %s: bad data abort: code %d instr 0x%08lx\n",
task_pid_nr(current), current->comm, code, instr);
dump_instr(KERN_ERR, regs);
- show_pte(current->mm, addr);
+ show_pte(KERN_ERR, current->mm, addr);
}
#endif
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/mm/cache-v7.S
*
* Copyright (C) 2001 Deep Blue Solutions Ltd.
* Copyright (C) 2005 ARM Ltd.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* This is the "shell" of the ARMv7 processor support.
*/
#include <linux/linkage.h>
#include "proc-macros.S"
+ #ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
+ .globl icache_size
+ .data
+ .align 2
+ icache_size:
+ .long 64
+ .text
+ #endif
/*
* The secondary kernel init calls v7_flush_dcache_all before it enables
* the L1; however, the L1 comes out of reset in an undefined state, so
skip:
add r10, r10, #2 @ increment cache number
cmp r3, r10
+ #ifdef CONFIG_ARM_ERRATA_814220
+ dsb
+ #endif
bgt flush_levels
finished:
mov r10, #0 @ switch back to cache level 0
cmp r12, r1
blo 1b
dsb ishst
+ #ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
+ ldr r3, =icache_size
+ ldr r2, [r3, #0]
+ #else
icache_line_size r2, r3
+ #endif
sub r3, r2, #1
bic r12, r0, r3
2:
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mm/fault.c
*
* Copyright (C) 1995 Linus Torvalds
* Modifications for ARM processor (c) 1995-2004 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/extable.h>
#include <linux/signal.h>
* This is useful to dump out the page tables associated with
* 'addr' in mm 'mm'.
*/
- void show_pte(struct mm_struct *mm, unsigned long addr)
+ void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
if (!mm)
mm = &init_mm;
- pr_alert("pgd = %p\n", mm->pgd);
+ printk("%spgd = %p\n", lvl, mm->pgd);
pgd = pgd_offset(mm, addr);
- pr_alert("[%08lx] *pgd=%08llx",
- addr, (long long)pgd_val(*pgd));
+ printk("%s[%08lx] *pgd=%08llx", lvl, addr, (long long)pgd_val(*pgd));
do {
pud_t *pud;
pr_cont("\n");
}
#else /* CONFIG_MMU */
- void show_pte(struct mm_struct *mm, unsigned long addr)
+ void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr)
{ }
#endif /* CONFIG_MMU */
* No handler, we'll have to terminate things with extreme prejudice.
*/
bust_spinlocks(1);
+ pr_alert("8<--- cut here ---\n");
pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
(addr < PAGE_SIZE) ? "NULL pointer dereference" :
"paging request", addr);
- show_pte(mm, addr);
+ show_pte(KERN_ALERT, mm, addr);
die("Oops", regs, fsr);
bust_spinlocks(0);
do_exit(SIGKILL);
#ifdef CONFIG_DEBUG_USER
if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) ||
((user_debug & UDBG_BUS) && (sig == SIGBUS))) {
- printk(KERN_DEBUG "%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n",
+ pr_err("8<--- cut here ---\n");
+ pr_err("%s: unhandled page fault (%d) at 0x%08lx, code 0x%03x\n",
tsk->comm, sig, addr, fsr);
- show_pte(tsk->mm, addr);
+ show_pte(KERN_ERR, tsk->mm, addr);
show_regs(regs);
}
#endif
if (!inf->fn(addr, fsr & ~FSR_LNX_PF, regs))
return;
+ pr_alert("8<--- cut here ---\n");
pr_alert("Unhandled fault: %s (0x%03x) at 0x%08lx\n",
inf->name, fsr, addr);
- show_pte(current->mm, addr);
+ show_pte(KERN_ALERT, current->mm, addr);
arm_notify_die("", regs, inf->sig, inf->code, (void __user *)addr,
fsr, 0);
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mm/init.c
*
* Copyright (C) 1995-2005 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#endif
}
+ #ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
+ void check_cpu_icache_size(int cpuid)
+ {
+ u32 size, ctr;
+
+ asm("mrc p15, 0, %0, c0, c0, 1" : "=r" (ctr));
+
+ size = 1 << ((ctr & 0xf) + 2);
+ if (cpuid != 0 && icache_size != size)
+ pr_info("CPU%u: detected I-Cache line size mismatch, workaround enabled\n",
+ cpuid);
+ if (icache_size > size)
+ icache_size = size;
+ }
+ #endif
+
void __init arm_memblock_init(const struct machine_desc *mdesc)
{
/* Register the kernel text, kernel data and initrd with memblock. */
*/
void __init mem_init(void)
{
- #ifdef CONFIG_HAVE_TCM
- /* These pointers are filled in on TCM detection */
- extern u32 dtcm_end;
- extern u32 itcm_end;
- #endif
-
set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
/* this will put all unused low memory onto the freelists */
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/mm/proc-v7.S
*
* Copyright (C) 2001 Deep Blue Solutions Ltd.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* This is the "shell" of the ARMv7 processor support.
*/
#include <linux/arm-smccc.h>
mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
orr r10, r10, #1 << 24 @ set bit #24
mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
+ #endif
+ #ifdef CONFIG_ARM_ERRATA_857271
+ mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
+ orr r10, r10, #3 << 10 @ set bits #10 and #11
+ mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
#endif
b __errata_finish
mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
orrle r10, r10, #1 << 12 @ set bit #12
mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
+ #endif
+ #ifdef CONFIG_ARM_ERRATA_857272
+ mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
+ orr r10, r10, #3 << 10 @ set bits #10 and #11
+ mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
#endif
b __errata_finish
projects / linux-2.6-block.git / commitdiff