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-rw-r--r--arch/arm/mm/Kconfig2
-rw-r--r--arch/arm/mm/proc-feroceon.S40
2 files changed, 1 insertions, 41 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 1b8229d9c9d5..a92a577c1b65 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -658,7 +658,7 @@ config CPU_DCACHE_SIZE
config CPU_DCACHE_WRITETHROUGH
bool "Force write through D-cache"
- depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_FEROCEON) && !CPU_DCACHE_DISABLE
+ depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020) && !CPU_DCACHE_DISABLE
default y if CPU_ARM925T
help
Say Y here to use the data cache in writethrough mode. Unless you
diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
index 90e7594e29b1..e9ac984d2897 100644
--- a/arch/arm/mm/proc-feroceon.S
+++ b/arch/arm/mm/proc-feroceon.S
@@ -118,12 +118,8 @@ ENTRY(feroceon_flush_kern_cache_all)
mov r2, #VM_EXEC
mov ip, #0
__flush_whole_cache:
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- mcr p15, 0, ip, c7, c6, 0 @ invalidate D cache
-#else
1: mrc p15, 0, r15, c7, c14, 3 @ test,clean,invalidate
bne 1b
-#endif
tst r2, #VM_EXEC
mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
mcrne p15, 0, ip, c7, c10, 4 @ drain WB
@@ -145,21 +141,12 @@ ENTRY(feroceon_flush_user_cache_range)
cmp r3, #CACHE_DLIMIT
bgt __flush_whole_cache
1: tst r2, #VM_EXEC
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
- mcrne p15, 0, r0, c7, c5, 1 @ invalidate I entry
- add r0, r0, #CACHE_DLINESIZE
- mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
- mcrne p15, 0, r0, c7, c5, 1 @ invalidate I entry
- add r0, r0, #CACHE_DLINESIZE
-#else
mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D entry
mcrne p15, 0, r0, c7, c5, 1 @ invalidate I entry
add r0, r0, #CACHE_DLINESIZE
mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D entry
mcrne p15, 0, r0, c7, c5, 1 @ invalidate I entry
add r0, r0, #CACHE_DLINESIZE
-#endif
cmp r0, r1
blo 1b
tst r2, #VM_EXEC
@@ -232,12 +219,10 @@ ENTRY(feroceon_flush_kern_dcache_page)
* (same as v4wb)
*/
ENTRY(feroceon_dma_inv_range)
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
tst r1, #CACHE_DLINESIZE - 1
mcrne p15, 0, r1, c7, c10, 1 @ clean D entry
-#endif
bic r0, r0, #CACHE_DLINESIZE - 1
1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
add r0, r0, #CACHE_DLINESIZE
@@ -257,13 +242,11 @@ ENTRY(feroceon_dma_inv_range)
* (same as v4wb)
*/
ENTRY(feroceon_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
add r0, r0, #CACHE_DLINESIZE
cmp r0, r1
blo 1b
-#endif
mcr p15, 0, r0, c7, c10, 4 @ drain WB
mov pc, lr
@@ -278,11 +261,7 @@ ENTRY(feroceon_dma_clean_range)
ENTRY(feroceon_dma_flush_range)
bic r0, r0, #CACHE_DLINESIZE - 1
1:
-#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
-#endif
add r0, r0, #CACHE_DLINESIZE
cmp r0, r1
blo 1b
@@ -301,12 +280,10 @@ ENTRY(feroceon_cache_fns)
.long feroceon_dma_flush_range
ENTRY(cpu_feroceon_dcache_clean_area)
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
add r0, r0, #CACHE_DLINESIZE
subs r1, r1, #CACHE_DLINESIZE
bhi 1b
-#endif
mcr p15, 0, r0, c7, c10, 4 @ drain WB
mov pc, lr
@@ -323,13 +300,9 @@ ENTRY(cpu_feroceon_dcache_clean_area)
ENTRY(cpu_feroceon_switch_mm)
#ifdef CONFIG_MMU
mov ip, #0
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- mcr p15, 0, ip, c7, c6, 0 @ invalidate D cache
-#else
@ && 'Clean & Invalidate whole DCache'
1: mrc p15, 0, r15, c7, c14, 3 @ test,clean,invalidate
bne 1b
-#endif
mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
mcr p15, 0, ip, c7, c10, 4 @ drain WB
mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
@@ -362,16 +335,9 @@ ENTRY(cpu_feroceon_set_pte_ext)
tst r1, #L_PTE_PRESENT | L_PTE_YOUNG @ Present and Young?
movne r2, #0
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- eor r3, r2, #0x0a @ C & small page?
- tst r3, #0x0b
- biceq r2, r2, #4
-#endif
str r2, [r0] @ hardware version
mov r0, r0
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
mcr p15, 0, r0, c7, c10, 1 @ clean D entry
-#endif
mcr p15, 0, r0, c7, c10, 4 @ drain WB
#endif
mov pc, lr
@@ -387,12 +353,6 @@ __feroceon_setup:
mcr p15, 0, r0, c8, c7 @ invalidate I,D TLBs on v4
#endif
-
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- mov r0, #4 @ disable write-back on caches explicitly
- mcr p15, 7, r0, c15, c0, 0
-#endif
-
adr r5, feroceon_crval
ldmia r5, {r5, r6}
mrc p15, 0, r0, c1, c0 @ get control register v4