diff options
Diffstat (limited to 'arch/arm/mm/proc-arm946.S')
| -rw-r--r-- | arch/arm/mm/proc-arm946.S | 117 |
1 files changed, 61 insertions, 56 deletions
diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S index e1861756442..0289cd905e7 100644 --- a/arch/arm/mm/proc-arm946.S +++ b/arch/arm/mm/proc-arm946.S @@ -13,10 +13,11 @@ #include <linux/linkage.h> #include <linux/init.h> #include <asm/assembler.h> +#include <asm/hwcap.h> #include <asm/pgtable-hwdef.h> #include <asm/pgtable.h> -#include <asm/procinfo.h> #include <asm/ptrace.h> +#include "proc-macros.S" /* * ARM946E-S is synthesizable to have 0KB to 1MB sized D-Cache, @@ -43,21 +44,18 @@ ENTRY(cpu_arm946_switch_mm) * cpu_arm946_proc_fin() */ ENTRY(cpu_arm946_proc_fin) - stmfd sp!, {lr} - mov ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE - msr cpsr_c, ip - bl arm946_flush_kern_cache_all mrc p15, 0, r0, c1, c0, 0 @ ctrl register bic r0, r0, #0x00001000 @ i-cache bic r0, r0, #0x00000004 @ d-cache mcr p15, 0, r0, c1, c0, 0 @ disable caches - ldmfd sp!, {pc} + mov pc, lr /* * cpu_arm946_reset(loc) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm946_reset) mov ip, #0 mcr p15, 0, ip, c7, c5, 0 @ flush I cache @@ -68,6 +66,8 @@ ENTRY(cpu_arm946_reset) bic ip, ip, #0x00001000 @ i-cache mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm946_reset) + .popsection /* * cpu_arm946_do_idle() @@ -78,6 +78,17 @@ ENTRY(cpu_arm946_do_idle) mov pc, lr /* + * flush_icache_all() + * + * Unconditionally clean and invalidate the entire icache. + */ +ENTRY(arm946_flush_icache_all) + mov r0, #0 + mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache + mov pc, lr +ENDPROC(arm946_flush_icache_all) + +/* * flush_user_cache_all() */ ENTRY(arm946_flush_user_cache_all) @@ -179,19 +190,21 @@ ENTRY(arm946_coherent_user_range) cmp r0, r1 blo 1b mcr p15, 0, r0, c7, c10, 4 @ drain WB + mov r0, #0 mov pc, lr /* - * flush_kern_dcache_page(void *page) + * flush_kern_dcache_area(void *addr, size_t size) * * Ensure no D cache aliasing occurs, either with itself or * the I cache * - * - addr - page aligned address + * - addr - kernel address + * - size - region size * (same as arm926) */ -ENTRY(arm946_flush_kern_dcache_page) - add r1, r0, #PAGE_SZ +ENTRY(arm946_flush_kern_dcache_area) + add r1, r0, r1 1: mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry add r0, r0, #CACHE_DLINESIZE cmp r0, r1 @@ -213,7 +226,7 @@ ENTRY(arm946_flush_kern_dcache_page) * - end - virtual end address * (same as arm926) */ -ENTRY(arm946_dma_inv_range) +arm946_dma_inv_range: #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH tst r0, #CACHE_DLINESIZE - 1 mcrne p15, 0, r0, c7, c10, 1 @ clean D entry @@ -238,7 +251,7 @@ ENTRY(arm946_dma_inv_range) * * (same as arm926) */ -ENTRY(arm946_dma_clean_range) +arm946_dma_clean_range: #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH bic r0, r0, #CACHE_DLINESIZE - 1 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry @@ -265,7 +278,7 @@ ENTRY(arm946_dma_flush_range) #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry #else - mcr p15, 0, r0, c7, c10, 1 @ clean D entry + mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry #endif add r0, r0, #CACHE_DLINESIZE cmp r0, r1 @@ -273,17 +286,35 @@ ENTRY(arm946_dma_flush_range) mcr p15, 0, r0, c7, c10, 4 @ drain WB mov pc, lr -ENTRY(arm946_cache_fns) - .long arm946_flush_kern_cache_all - .long arm946_flush_user_cache_all - .long arm946_flush_user_cache_range - .long arm946_coherent_kern_range - .long arm946_coherent_user_range - .long arm946_flush_kern_dcache_page - .long arm946_dma_inv_range - .long arm946_dma_clean_range - .long arm946_dma_flush_range +/* + * dma_map_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(arm946_dma_map_area) + add r1, r1, r0 + cmp r2, #DMA_TO_DEVICE + beq arm946_dma_clean_range + bcs arm946_dma_inv_range + b arm946_dma_flush_range +ENDPROC(arm946_dma_map_area) +/* + * dma_unmap_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +ENTRY(arm946_dma_unmap_area) + mov pc, lr +ENDPROC(arm946_dma_unmap_area) + + .globl arm946_flush_kern_cache_louis + .equ arm946_flush_kern_cache_louis, arm946_flush_kern_cache_all + + @ define struct cpu_cache_fns (see <asm/cacheflush.h> and proc-macros.S) + define_cache_functions arm946 ENTRY(cpu_arm946_dcache_clean_area) #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH @@ -295,8 +326,6 @@ ENTRY(cpu_arm946_dcache_clean_area) mcr p15, 0, r0, c7, c10, 4 @ drain WB mov pc, lr - __INIT - .type __arm946_setup, #function __arm946_setup: mov r0, #0 @@ -369,39 +398,14 @@ __arm946_setup: __INITDATA -/* - * Purpose : Function pointers used to access above functions - all calls - * come through these - */ - .type arm946_processor_functions, #object -ENTRY(arm946_processor_functions) - .word nommu_early_abort - .word cpu_arm946_proc_init - .word cpu_arm946_proc_fin - .word cpu_arm946_reset - .word cpu_arm946_do_idle - - .word cpu_arm946_dcache_clean_area - .word cpu_arm946_switch_mm - .word 0 @ cpu_*_set_pte - .size arm946_processor_functions, . - arm946_processor_functions + @ define struct processor (see <asm/proc-fns.h> and proc-macros.S) + define_processor_functions arm946, dabort=nommu_early_abort, pabort=legacy_pabort, nommu=1 .section ".rodata" - .type cpu_arch_name, #object -cpu_arch_name: - .asciz "armv5te" - .size cpu_arch_name, . - cpu_arch_name - - .type cpu_elf_name, #object -cpu_elf_name: - .asciz "v5t" - .size cpu_elf_name, . - cpu_elf_name - - .type cpu_arm946_name, #object -cpu_arm946_name: - .ascii "ARM946E-S" - .size cpu_arm946_name, . - cpu_arm946_name + string cpu_arch_name, "armv5te" + string cpu_elf_name, "v5t" + string cpu_arm946_name, "ARM946E-S" .align @@ -411,6 +415,7 @@ __arm946_proc_info: .long 0x41009460 .long 0xff00fff0 .long 0 + .long 0 b __arm946_setup .long cpu_arch_name .long cpu_elf_name @@ -419,6 +424,6 @@ __arm946_proc_info: .long arm946_processor_functions .long 0 .long 0 - .long arm940_cache_fns + .long arm946_cache_fns .size __arm946_proc_info, . - __arm946_proc_info |