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-rw-r--r--arch/arm/kernel/iwmmxt.S55
1 files changed, 42 insertions, 13 deletions
diff --git a/arch/arm/kernel/iwmmxt.S b/arch/arm/kernel/iwmmxt.S
index b63b528f22a6..7fa3bb0d2397 100644
--- a/arch/arm/kernel/iwmmxt.S
+++ b/arch/arm/kernel/iwmmxt.S
@@ -19,6 +19,14 @@
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
+#if defined(CONFIG_CPU_PJ4)
+#define PJ4(code...) code
+#define XSC(code...)
+#else
+#define PJ4(code...)
+#define XSC(code...) code
+#endif
+
#define MMX_WR0 (0x00)
#define MMX_WR1 (0x08)
#define MMX_WR2 (0x10)
@@ -58,11 +66,17 @@
ENTRY(iwmmxt_task_enable)
- mrc p15, 0, r2, c15, c1, 0
- tst r2, #0x3 @ CP0 and CP1 accessible?
+ XSC(mrc p15, 0, r2, c15, c1, 0)
+ PJ4(mrc p15, 0, r2, c1, c0, 2)
+ @ CP0 and CP1 accessible?
+ XSC(tst r2, #0x3)
+ PJ4(tst r2, #0xf)
movne pc, lr @ if so no business here
- orr r2, r2, #0x3 @ enable access to CP0 and CP1
- mcr p15, 0, r2, c15, c1, 0
+ @ enable access to CP0 and CP1
+ XSC(orr r2, r2, #0x3)
+ XSC(mcr p15, 0, r2, c15, c1, 0)
+ PJ4(orr r2, r2, #0xf)
+ PJ4(mcr p15, 0, r2, c1, c0, 2)
ldr r3, =concan_owner
add r0, r10, #TI_IWMMXT_STATE @ get task Concan save area
@@ -179,17 +193,26 @@ ENTRY(iwmmxt_task_disable)
teqne r1, r2 @ or specified one?
bne 1f @ no: quit
- mrc p15, 0, r4, c15, c1, 0
- orr r4, r4, #0x3 @ enable access to CP0 and CP1
- mcr p15, 0, r4, c15, c1, 0
+ @ enable access to CP0 and CP1
+ XSC(mrc p15, 0, r4, c15, c1, 0)
+ XSC(orr r4, r4, #0xf)
+ XSC(mcr p15, 0, r4, c15, c1, 0)
+ PJ4(mrc p15, 0, r4, c1, c0, 2)
+ PJ4(orr r4, r4, #0x3)
+ PJ4(mcr p15, 0, r4, c1, c0, 2)
+
mov r0, #0 @ nothing to load
str r0, [r3] @ no more current owner
mrc p15, 0, r2, c2, c0, 0
mov r2, r2 @ cpwait
bl concan_save
- bic r4, r4, #0x3 @ disable access to CP0 and CP1
- mcr p15, 0, r4, c15, c1, 0
+ @ disable access to CP0 and CP1
+ XSC(bic r4, r4, #0x3)
+ XSC(mcr p15, 0, r4, c15, c1, 0)
+ PJ4(bic r4, r4, #0xf)
+ PJ4(mcr p15, 0, r4, c1, c0, 2)
+
mrc p15, 0, r2, c2, c0, 0
mov r2, r2 @ cpwait
@@ -277,8 +300,11 @@ ENTRY(iwmmxt_task_restore)
*/
ENTRY(iwmmxt_task_switch)
- mrc p15, 0, r1, c15, c1, 0
- tst r1, #0x3 @ CP0 and CP1 accessible?
+ XSC(mrc p15, 0, r1, c15, c1, 0)
+ PJ4(mrc p15, 0, r1, c1, c0, 2)
+ @ CP0 and CP1 accessible?
+ XSC(tst r1, #0x3)
+ PJ4(tst r1, #0xf)
bne 1f @ yes: block them for next task
ldr r2, =concan_owner
@@ -287,8 +313,11 @@ ENTRY(iwmmxt_task_switch)
teq r2, r3 @ next task owns it?
movne pc, lr @ no: leave Concan disabled
-1: eor r1, r1, #3 @ flip Concan access
- mcr p15, 0, r1, c15, c1, 0
+1: @ flip Conan access
+ XSC(eor r1, r1, #0x3)
+ XSC(mcr p15, 0, r1, c15, c1, 0)
+ PJ4(eor r1, r1, #0xf)
+ PJ4(mcr p15, 0, r1, c1, c0, 2)
mrc p15, 0, r1, c2, c0, 0
sub pc, lr, r1, lsr #32 @ cpwait and return