diff options
Diffstat (limited to 'powerpc/pmu/ebb/busy_loop.S')
| -rw-r--r-- | powerpc/pmu/ebb/busy_loop.S | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/powerpc/pmu/ebb/busy_loop.S b/powerpc/pmu/ebb/busy_loop.S new file mode 100644 index 0000000..c7e4093 --- /dev/null +++ b/powerpc/pmu/ebb/busy_loop.S @@ -0,0 +1,271 @@ +/* + * Copyright 2014, Michael Ellerman, IBM Corp. + * Licensed under GPLv2. + */ + +#include <ppc-asm.h> + + .text + +FUNC_START(core_busy_loop) + stdu %r1, -168(%r1) + std r14, 160(%r1) + std r15, 152(%r1) + std r16, 144(%r1) + std r17, 136(%r1) + std r18, 128(%r1) + std r19, 120(%r1) + std r20, 112(%r1) + std r21, 104(%r1) + std r22, 96(%r1) + std r23, 88(%r1) + std r24, 80(%r1) + std r25, 72(%r1) + std r26, 64(%r1) + std r27, 56(%r1) + std r28, 48(%r1) + std r29, 40(%r1) + std r30, 32(%r1) + std r31, 24(%r1) + + li r3, 0x3030 + std r3, -96(%r1) + li r4, 0x4040 + std r4, -104(%r1) + li r5, 0x5050 + std r5, -112(%r1) + li r6, 0x6060 + std r6, -120(%r1) + li r7, 0x7070 + std r7, -128(%r1) + li r8, 0x0808 + std r8, -136(%r1) + li r9, 0x0909 + std r9, -144(%r1) + li r10, 0x1010 + std r10, -152(%r1) + li r11, 0x1111 + std r11, -160(%r1) + li r14, 0x1414 + std r14, -168(%r1) + li r15, 0x1515 + std r15, -176(%r1) + li r16, 0x1616 + std r16, -184(%r1) + li r17, 0x1717 + std r17, -192(%r1) + li r18, 0x1818 + std r18, -200(%r1) + li r19, 0x1919 + std r19, -208(%r1) + li r20, 0x2020 + std r20, -216(%r1) + li r21, 0x2121 + std r21, -224(%r1) + li r22, 0x2222 + std r22, -232(%r1) + li r23, 0x2323 + std r23, -240(%r1) + li r24, 0x2424 + std r24, -248(%r1) + li r25, 0x2525 + std r25, -256(%r1) + li r26, 0x2626 + std r26, -264(%r1) + li r27, 0x2727 + std r27, -272(%r1) + li r28, 0x2828 + std r28, -280(%r1) + li r29, 0x2929 + std r29, -288(%r1) + li r30, 0x3030 + li r31, 0x3131 + + li r3, 0 +0: addi r3, r3, 1 + cmpwi r3, 100 + blt 0b + + /* Return 1 (fail) unless we get through all the checks */ + li r3, 1 + + /* Check none of our registers have been corrupted */ + cmpwi r4, 0x4040 + bne 1f + cmpwi r5, 0x5050 + bne 1f + cmpwi r6, 0x6060 + bne 1f + cmpwi r7, 0x7070 + bne 1f + cmpwi r8, 0x0808 + bne 1f + cmpwi r9, 0x0909 + bne 1f + cmpwi r10, 0x1010 + bne 1f + cmpwi r11, 0x1111 + bne 1f + cmpwi r14, 0x1414 + bne 1f + cmpwi r15, 0x1515 + bne 1f + cmpwi r16, 0x1616 + bne 1f + cmpwi r17, 0x1717 + bne 1f + cmpwi r18, 0x1818 + bne 1f + cmpwi r19, 0x1919 + bne 1f + cmpwi r20, 0x2020 + bne 1f + cmpwi r21, 0x2121 + bne 1f + cmpwi r22, 0x2222 + bne 1f + cmpwi r23, 0x2323 + bne 1f + cmpwi r24, 0x2424 + bne 1f + cmpwi r25, 0x2525 + bne 1f + cmpwi r26, 0x2626 + bne 1f + cmpwi r27, 0x2727 + bne 1f + cmpwi r28, 0x2828 + bne 1f + cmpwi r29, 0x2929 + bne 1f + cmpwi r30, 0x3030 + bne 1f + cmpwi r31, 0x3131 + bne 1f + + /* Load junk into all our registers before we reload them from the stack. */ + li r3, 0xde + li r4, 0xad + li r5, 0xbe + li r6, 0xef + li r7, 0xde + li r8, 0xad + li r9, 0xbe + li r10, 0xef + li r11, 0xde + li r14, 0xad + li r15, 0xbe + li r16, 0xef + li r17, 0xde + li r18, 0xad + li r19, 0xbe + li r20, 0xef + li r21, 0xde + li r22, 0xad + li r23, 0xbe + li r24, 0xef + li r25, 0xde + li r26, 0xad + li r27, 0xbe + li r28, 0xef + li r29, 0xdd + + ld r3, -96(%r1) + cmpwi r3, 0x3030 + bne 1f + ld r4, -104(%r1) + cmpwi r4, 0x4040 + bne 1f + ld r5, -112(%r1) + cmpwi r5, 0x5050 + bne 1f + ld r6, -120(%r1) + cmpwi r6, 0x6060 + bne 1f + ld r7, -128(%r1) + cmpwi r7, 0x7070 + bne 1f + ld r8, -136(%r1) + cmpwi r8, 0x0808 + bne 1f + ld r9, -144(%r1) + cmpwi r9, 0x0909 + bne 1f + ld r10, -152(%r1) + cmpwi r10, 0x1010 + bne 1f + ld r11, -160(%r1) + cmpwi r11, 0x1111 + bne 1f + ld r14, -168(%r1) + cmpwi r14, 0x1414 + bne 1f + ld r15, -176(%r1) + cmpwi r15, 0x1515 + bne 1f + ld r16, -184(%r1) + cmpwi r16, 0x1616 + bne 1f + ld r17, -192(%r1) + cmpwi r17, 0x1717 + bne 1f + ld r18, -200(%r1) + cmpwi r18, 0x1818 + bne 1f + ld r19, -208(%r1) + cmpwi r19, 0x1919 + bne 1f + ld r20, -216(%r1) + cmpwi r20, 0x2020 + bne 1f + ld r21, -224(%r1) + cmpwi r21, 0x2121 + bne 1f + ld r22, -232(%r1) + cmpwi r22, 0x2222 + bne 1f + ld r23, -240(%r1) + cmpwi r23, 0x2323 + bne 1f + ld r24, -248(%r1) + cmpwi r24, 0x2424 + bne 1f + ld r25, -256(%r1) + cmpwi r25, 0x2525 + bne 1f + ld r26, -264(%r1) + cmpwi r26, 0x2626 + bne 1f + ld r27, -272(%r1) + cmpwi r27, 0x2727 + bne 1f + ld r28, -280(%r1) + cmpwi r28, 0x2828 + bne 1f + ld r29, -288(%r1) + cmpwi r29, 0x2929 + bne 1f + + /* Load 0 (success) to return */ + li r3, 0 + +1: ld r14, 160(%r1) + ld r15, 152(%r1) + ld r16, 144(%r1) + ld r17, 136(%r1) + ld r18, 128(%r1) + ld r19, 120(%r1) + ld r20, 112(%r1) + ld r21, 104(%r1) + ld r22, 96(%r1) + ld r23, 88(%r1) + ld r24, 80(%r1) + ld r25, 72(%r1) + ld r26, 64(%r1) + ld r27, 56(%r1) + ld r28, 48(%r1) + ld r29, 40(%r1) + ld r30, 32(%r1) + ld r31, 24(%r1) + addi %r1, %r1, 168 + blr |