[ARM] feroceon: remove CONFIG_CPU_DCACHE_WRITETHROUGH check

Since the Feroceon doesn't have a global WT override bit like
ARM926 does, remove all code relating to this mode of operation
from proc-feroceon.S.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

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