summaryrefslogtreecommitdiff
path: root/arch/arm/mm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/cache-v6.S33
-rw-r--r--arch/arm/mm/flush.c23
-rw-r--r--arch/arm/mm/proc-v6.S3
-rw-r--r--arch/arm/mm/proc-v7.S22
-rw-r--r--arch/arm/mm/tlb-v6.S3
-rw-r--r--arch/arm/mm/tlb-v7.S3
6 files changed, 81 insertions, 6 deletions
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index 2c6c2a7c05a0..8f5c13f4c936 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -20,6 +20,31 @@
#define D_CACHE_LINE_SIZE 32
#define BTB_FLUSH_SIZE 8
+#ifdef CONFIG_ARM_ERRATA_411920
+/*
+ * Invalidate the entire I cache (this code is a workaround for the ARM1136
+ * erratum 411920 - Invalidate Instruction Cache operation can fail. This
+ * erratum is present in 1136, 1156 and 1176. It does not affect the MPCore.
+ *
+ * Registers:
+ * r0 - set to 0
+ * r1 - corrupted
+ */
+ENTRY(v6_icache_inval_all)
+ mov r0, #0
+ mrs r1, cpsr
+ cpsid ifa @ disable interrupts
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache
+ msr cpsr_cx, r1 @ restore interrupts
+ .rept 11 @ ARM Ltd recommends at least
+ nop @ 11 NOPs
+ .endr
+ mov pc, lr
+#endif
+
/*
* v6_flush_cache_all()
*
@@ -31,8 +56,12 @@ ENTRY(v6_flush_kern_cache_all)
mov r0, #0
#ifdef HARVARD_CACHE
mcr p15, 0, r0, c7, c14, 0 @ D cache clean+invalidate
+#ifndef CONFIG_ARM_ERRATA_411920
mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate
#else
+ b v6_icache_inval_all
+#endif
+#else
mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate
#endif
mov pc, lr
@@ -103,8 +132,12 @@ ENTRY(v6_coherent_user_range)
mov r0, #0
#ifdef HARVARD_CACHE
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
+#ifndef CONFIG_ARM_ERRATA_411920
mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate
#else
+ b v6_icache_inval_all
+#endif
+#else
mcr p15, 0, r0, c7, c5, 6 @ invalidate BTB
#endif
mov pc, lr
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 4e283481cee1..c07222eb5ce0 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -18,6 +18,10 @@
#include "mm.h"
+#ifdef CONFIG_ARM_ERRATA_411920
+extern void v6_icache_inval_all(void);
+#endif
+
#ifdef CONFIG_CPU_CACHE_VIPT
#define ALIAS_FLUSH_START 0xffff4000
@@ -32,10 +36,15 @@ static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
asm( "mcrr p15, 0, %1, %0, c14\n"
" mcr p15, 0, %2, c7, c10, 4\n"
+#ifndef CONFIG_ARM_ERRATA_411920
" mcr p15, 0, %2, c7, c5, 0\n"
+#endif
:
: "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES), "r" (zero)
: "cc");
+#ifdef CONFIG_ARM_ERRATA_411920
+ v6_icache_inval_all();
+#endif
}
void flush_cache_mm(struct mm_struct *mm)
@@ -48,11 +57,16 @@ void flush_cache_mm(struct mm_struct *mm)
if (cache_is_vipt_aliasing()) {
asm( "mcr p15, 0, %0, c7, c14, 0\n"
+ " mcr p15, 0, %0, c7, c10, 4\n"
+#ifndef CONFIG_ARM_ERRATA_411920
" mcr p15, 0, %0, c7, c5, 0\n"
- " mcr p15, 0, %0, c7, c10, 4"
+#endif
:
: "r" (0)
: "cc");
+#ifdef CONFIG_ARM_ERRATA_411920
+ v6_icache_inval_all();
+#endif
}
}
@@ -67,11 +81,16 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned
if (cache_is_vipt_aliasing()) {
asm( "mcr p15, 0, %0, c7, c14, 0\n"
+ " mcr p15, 0, %0, c7, c10, 4\n"
+#ifndef CONFIG_ARM_ERRATA_411920
" mcr p15, 0, %0, c7, c5, 0\n"
- " mcr p15, 0, %0, c7, c10, 4"
+#endif
:
: "r" (0)
: "cc");
+#ifdef CONFIG_ARM_ERRATA_411920
+ v6_icache_inval_all();
+#endif
}
}
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index f0cc599facb7..087e239704df 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -10,6 +10,7 @@
*
* This is the "shell" of the ARMv6 processor support.
*/
+#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
@@ -132,7 +133,7 @@ cpu_v6_name:
.asciz "ARMv6-compatible processor"
.align
- .section ".text.init", #alloc, #execinstr
+ __INIT
/*
* __v6_setup
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index d1ebec42521d..3397f1e64d76 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -9,6 +9,7 @@
*
* This is the "shell" of the ARMv7 processor support.
*/
+#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
@@ -95,6 +96,9 @@ ENTRY(cpu_v7_switch_mm)
mov r2, #0
ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
orr r0, r0, #TTB_FLAGS
+#ifdef CONFIG_ARM_ERRATA_430973
+ mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB
+#endif
mcr p15, 0, r2, c13, c0, 1 @ set reserved context ID
isb
1: mcr p15, 0, r0, c2, c0, 0 @ set TTB 0
@@ -153,7 +157,7 @@ cpu_v7_name:
.ascii "ARMv7 Processor"
.align
- .section ".text.init", #alloc, #execinstr
+ __INIT
/*
* __v7_setup
@@ -180,6 +184,22 @@ __v7_setup:
stmia r12, {r0-r5, r7, r9, r11, lr}
bl v7_flush_dcache_all
ldmia r12, {r0-r5, r7, r9, r11, lr}
+#ifdef CONFIG_ARM_ERRATA_430973
+ mrc p15, 0, r10, c1, c0, 1 @ read aux control register
+ orr r10, r10, #(1 << 6) @ set IBE to 1
+ mcr p15, 0, r10, c1, c0, 1 @ write aux control register
+#endif
+#ifdef CONFIG_ARM_ERRATA_458693
+ mrc p15, 0, r10, c1, c0, 1 @ read aux control register
+ orr r10, r10, #(1 << 5) @ set L1NEON to 1
+ orr r10, r10, #(1 << 9) @ set PLDNOP to 1
+ mcr p15, 0, r10, c1, c0, 1 @ write aux control register
+#endif
+#ifdef CONFIG_ARM_ERRATA_460075
+ mrc p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
+ orr r10, r10, #(1 << 22) @ set the Write Allocate disable bit
+ mcr p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
+#endif
mov r10, #0
#ifdef HARVARD_CACHE
mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
diff --git a/arch/arm/mm/tlb-v6.S b/arch/arm/mm/tlb-v6.S
index 20f84bbaa9bb..73d7d89b04c4 100644
--- a/arch/arm/mm/tlb-v6.S
+++ b/arch/arm/mm/tlb-v6.S
@@ -10,6 +10,7 @@
* ARM architecture version 6 TLB handling functions.
* These assume a split I/D TLB.
*/
+#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/page.h>
@@ -87,7 +88,7 @@ ENTRY(v6wbi_flush_kern_tlb_range)
mcr p15, 0, r2, c7, c5, 4 @ prefetch flush
mov pc, lr
- .section ".text.init", #alloc, #execinstr
+ __INIT
.type v6wbi_tlb_fns, #object
ENTRY(v6wbi_tlb_fns)
diff --git a/arch/arm/mm/tlb-v7.S b/arch/arm/mm/tlb-v7.S
index 24ba5109f2e7..b637e7380ab7 100644
--- a/arch/arm/mm/tlb-v7.S
+++ b/arch/arm/mm/tlb-v7.S
@@ -11,6 +11,7 @@
* ARM architecture version 6 TLB handling functions.
* These assume a split I/D TLB.
*/
+#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/page.h>
@@ -80,7 +81,7 @@ ENTRY(v7wbi_flush_kern_tlb_range)
mov pc, lr
ENDPROC(v7wbi_flush_kern_tlb_range)
- .section ".text.init", #alloc, #execinstr
+ __INIT
.type v7wbi_tlb_fns, #object
ENTRY(v7wbi_tlb_fns)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 03:06:28 +0000