diff options
Diffstat (limited to 'arch/arm/mm')
-rw-r--r-- | arch/arm/mm/cache-v6.S | 33 | ||||
-rw-r--r-- | arch/arm/mm/flush.c | 23 | ||||
-rw-r--r-- | arch/arm/mm/proc-v6.S | 3 | ||||
-rw-r--r-- | arch/arm/mm/proc-v7.S | 22 | ||||
-rw-r--r-- | arch/arm/mm/tlb-v6.S | 3 | ||||
-rw-r--r-- | arch/arm/mm/tlb-v7.S | 3 |
6 files changed, 81 insertions, 6 deletions
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S index 2c6c2a7..8f5c13f 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 4e28348..c07222e 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 f0cc599..087e239 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 d1ebec4..3397f1e 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 20f84bb..73d7d89 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 24ba510..b637e73 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) |