diff options
Diffstat (limited to 'arch/arm/kernel/iwmmxt.S')
| -rw-r--r-- | arch/arm/kernel/iwmmxt.S | 55 |
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 |