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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-04-07 13:17:15 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-04-07 13:23:57 +0100
commit95f3df6bcb89d370c57b7165f55c5a409d011c8e (patch)
tree9accc55603a6274a281fce6950fbef26f051a2c5 /arch
parentf1dc24d53e9e91cf795f05751eeb7e220c7c15e1 (diff)
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[ARM] Fix SA110/SA1100 cache flushing
We had two implementations for flushing the cache, which meant StrongARM caches weren't being correctly flushed. Fix this by always using the v4wb_flush_kern_cache_all method, rather than duplicating it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/cache-v4wb.S26
-rw-r--r--arch/arm/mm/proc-sa110.S25
-rw-r--r--arch/arm/mm/proc-sa1100.S37
3 files changed, 30 insertions, 58 deletions
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
index 5c4055b62d97..54e3c5bb5186 100644
--- a/arch/arm/mm/cache-v4wb.S
+++ b/arch/arm/mm/cache-v4wb.S
@@ -10,7 +10,7 @@
#include <linux/config.h>
#include <linux/linkage.h>
#include <linux/init.h>
-#include <asm/hardware.h>
+#include <asm/memory.h>
#include <asm/page.h>
#include "proc-macros.S"
@@ -46,6 +46,11 @@
*/
#define CACHE_DLIMIT (CACHE_DSIZE * 4)
+ .data
+flush_base:
+ .long FLUSH_BASE
+ .text
+
/*
* flush_user_cache_all()
*
@@ -63,11 +68,21 @@ ENTRY(v4wb_flush_kern_cache_all)
mov ip, #0
mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
__flush_whole_cache:
- mov r0, #FLUSH_BASE
- add r1, r0, #CACHE_DSIZE
-1: ldr r2, [r0], #32
- cmp r0, r1
+ ldr r3, =flush_base
+ ldr r1, [r3, #0]
+ eor r1, r1, #CACHE_DSIZE
+ str r1, [r3, #0]
+ add r2, r1, #CACHE_DSIZE
+1: ldr r3, [r1], #32
+ cmp r1, r2
+ blo 1b
+#ifdef FLUSH_BASE_MINICACHE
+ add r2, r2, #FLUSH_BASE_MINICACHE - FLUSH_BASE
+ sub r1, r2, #512 @ only 512 bytes
+1: ldr r3, [r1], #32
+ cmp r1, r2
blo 1b
+#endif
mcr p15, 0, ip, c7, c10, 4 @ drain write buffer
mov pc, lr
@@ -82,6 +97,7 @@ __flush_whole_cache:
* - flags - vma_area_struct flags describing address space
*/
ENTRY(v4wb_flush_user_cache_range)
+ mov ip, #0
sub r3, r1, r0 @ calculate total size
tst r2, #VM_EXEC @ executable region?
mcrne p15, 0, ip, c7, c5, 0 @ invalidate I cache
diff --git a/arch/arm/mm/proc-sa110.S b/arch/arm/mm/proc-sa110.S
index c916a6cae404..a2dd5ae1077d 100644
--- a/arch/arm/mm/proc-sa110.S
+++ b/arch/arm/mm/proc-sa110.S
@@ -26,22 +26,7 @@
* the cache line size of the I and D cache
*/
#define DCACHELINESIZE 32
-#define FLUSH_OFFSET 32768
- .macro flush_110_dcache rd, ra, re
- ldr \rd, =flush_base
- ldr \ra, [\rd]
- eor \ra, \ra, #FLUSH_OFFSET
- str \ra, [\rd]
- add \re, \ra, #16384 @ only necessary for 16k
-1001: ldr \rd, [\ra], #DCACHELINESIZE
- teq \re, \ra
- bne 1001b
- .endm
-
- .data
-flush_base:
- .long FLUSH_BASE
.text
/*
@@ -145,13 +130,11 @@ ENTRY(cpu_sa110_dcache_clean_area)
*/
.align 5
ENTRY(cpu_sa110_switch_mm)
- flush_110_dcache r3, ip, r1
- mov r1, #0
- mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache
- mcr p15, 0, r1, c7, c10, 4 @ drain WB
+ str lr, [sp, #-4]!
+ bl v4wb_flush_kern_cache_all @ clears IP
mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
- mcr p15, 0, r1, c8, c7, 0 @ invalidate I & D TLBs
- mov pc, lr
+ mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
+ ldr pc, [sp], #4
/*
* cpu_sa110_set_pte(ptep, pte)
diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index 41f21f2dd8ff..777ad99c1439 100644
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -30,30 +30,6 @@
* the cache line size of the I and D cache
*/
#define DCACHELINESIZE 32
-#define FLUSH_OFFSET 32768
-
- .macro flush_1100_dcache rd, ra, re
- ldr \rd, =flush_base
- ldr \ra, [\rd]
- eor \ra, \ra, #FLUSH_OFFSET
- str \ra, [\rd]
- add \re, \ra, #8192 @ only necessary for 8k
-1001: ldr \rd, [\ra], #DCACHELINESIZE
- teq \re, \ra
- bne 1001b
-#ifdef FLUSH_BASE_MINICACHE
- add \ra, \ra, #FLUSH_BASE_MINICACHE - FLUSH_BASE
- add \re, \ra, #512 @ only 512 bytes
-1002: ldr \rd, [\ra], #DCACHELINESIZE
- teq \re, \ra
- bne 1002b
-#endif
- .endm
-
- .data
-flush_base:
- .long FLUSH_BASE
- .text
__INIT
@@ -79,9 +55,8 @@ ENTRY(cpu_sa1100_proc_fin)
stmfd sp!, {lr}
mov ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
msr cpsr_c, ip
- flush_1100_dcache r0, r1, r2 @ clean caches
- mov r0, #0
- mcr p15, 0, r0, c15, c2, 2 @ Disable clock switching
+ bl v4wb_flush_kern_cache_all
+ mcr p15, 0, ip, c15, c2, 2 @ Disable clock switching
mrc p15, 0, r0, c1, c0, 0 @ ctrl register
bic r0, r0, #0x1000 @ ...i............
bic r0, r0, #0x000e @ ............wca.
@@ -167,14 +142,12 @@ ENTRY(cpu_sa1100_dcache_clean_area)
*/
.align 5
ENTRY(cpu_sa1100_switch_mm)
- flush_1100_dcache r3, ip, r1
- mov ip, #0
- mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
+ str lr, [sp, #-4]!
+ bl v4wb_flush_kern_cache_all @ clears IP
mcr p15, 0, ip, c9, c0, 0 @ invalidate RB
- mcr p15, 0, ip, c7, c10, 4 @ drain WB
mcr p15, 0, r0, c2, c0, 0 @ load page table pointer
mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs
- mov pc, lr
+ ldr pc, [sp], #4
/*
* cpu_sa1100_set_pte(ptep, pte)
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