| David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 1 | .align 32 |
| 2 | .globl __flushw_user |
| 3 | .type __flushw_user,#function |
| 4 | __flushw_user: |
| 5 | rdpr %otherwin, %g1 |
| 6 | brz,pn %g1, 2f |
| 7 | clr %g2 |
| 8 | 1: save %sp, -128, %sp |
| 9 | rdpr %otherwin, %g1 |
| 10 | brnz,pt %g1, 1b |
| 11 | add %g2, 1, %g2 |
| 12 | 1: sub %g2, 1, %g2 |
| 13 | brnz,pt %g2, 1b |
| 14 | restore %g0, %g0, %g0 |
| 15 | 2: retl |
| 16 | nop |
| 17 | .size __flushw_user,.-__flushw_user |
| 18 | |
| 19 | /* Flush %fp and %i7 to the stack for all register |
| 20 | * windows active inside of the cpu. This allows |
| 21 | * show_stack_trace() to avoid using an expensive |
| 22 | * 'flushw'. |
| 23 | */ |
| 24 | .globl stack_trace_flush |
| 25 | .type stack_trace_flush,#function |
| 26 | stack_trace_flush: |
| 27 | rdpr %pstate, %o0 |
| 28 | wrpr %o0, PSTATE_IE, %pstate |
| 29 | |
| 30 | rdpr %cwp, %g1 |
| 31 | rdpr %canrestore, %g2 |
| 32 | sub %g1, 1, %g3 |
| 33 | |
| 34 | 1: brz,pn %g2, 2f |
| 35 | sub %g2, 1, %g2 |
| 36 | wrpr %g3, %cwp |
| 37 | stx %fp, [%sp + STACK_BIAS + RW_V9_I6] |
| 38 | stx %i7, [%sp + STACK_BIAS + RW_V9_I7] |
| 39 | ba,pt %xcc, 1b |
| 40 | sub %g3, 1, %g3 |
| 41 | |
| 42 | 2: wrpr %g1, %cwp |
| 43 | wrpr %o0, %pstate |
| 44 | |
| 45 | retl |
| 46 | nop |
| 47 | .size stack_trace_flush,.-stack_trace_flush |
| 48 | |
| David S. Miller | 954fbc8 | 2010-04-03 23:50:59 -0700 | [diff] [blame] | 49 | #ifdef CONFIG_PERF_EVENTS |
| 50 | .globl perf_arch_fetch_caller_regs |
| 51 | .type perf_arch_fetch_caller_regs,#function |
| 52 | perf_arch_fetch_caller_regs: |
| 53 | /* We always read the %pstate into %o5 since we will use |
| 54 | * that to construct a fake %tstate to store into the regs. |
| 55 | */ |
| 56 | rdpr %pstate, %o5 |
| 57 | brz,pn %o2, 50f |
| 58 | mov %o2, %g7 |
| 59 | |
| 60 | /* Turn off interrupts while we walk around the register |
| 61 | * window by hand. |
| 62 | */ |
| 63 | wrpr %o5, PSTATE_IE, %pstate |
| 64 | |
| 65 | /* The %canrestore tells us how many register windows are |
| 66 | * still live in the chip above us, past that we have to |
| 67 | * walk the frame as saved on the stack. We stash away |
| 68 | * the %cwp in %g1 so we can return back to the original |
| 69 | * register window. |
| 70 | */ |
| 71 | rdpr %cwp, %g1 |
| 72 | rdpr %canrestore, %g2 |
| 73 | sub %g1, 1, %g3 |
| 74 | |
| 75 | /* We have the skip count in %g7, if it hits zero then |
| 76 | * %fp/%i7 are the registers we need. Otherwise if our |
| 77 | * %canrestore count maintained in %g2 hits zero we have |
| 78 | * to start traversing the stack. |
| 79 | */ |
| 80 | 10: brz,pn %g2, 4f |
| 81 | sub %g2, 1, %g2 |
| 82 | wrpr %g3, %cwp |
| 83 | subcc %g7, 1, %g7 |
| 84 | bne,pt %xcc, 10b |
| 85 | sub %g3, 1, %g3 |
| 86 | |
| 87 | /* We found the values we need in the cpu's register |
| 88 | * windows. |
| 89 | */ |
| 90 | mov %fp, %g3 |
| 91 | ba,pt %xcc, 3f |
| 92 | mov %i7, %g2 |
| 93 | |
| 94 | 50: mov %fp, %g3 |
| 95 | ba,pt %xcc, 2f |
| 96 | mov %i7, %g2 |
| 97 | |
| 98 | /* We hit the end of the valid register windows in the |
| 99 | * cpu, start traversing the stack frame. |
| 100 | */ |
| 101 | 4: mov %fp, %g3 |
| 102 | |
| 103 | 20: ldx [%g3 + STACK_BIAS + RW_V9_I7], %g2 |
| 104 | subcc %g7, 1, %g7 |
| 105 | bne,pn %xcc, 20b |
| 106 | ldx [%g3 + STACK_BIAS + RW_V9_I6], %g3 |
| 107 | |
| 108 | /* Restore the current register window position and |
| 109 | * re-enable interrupts. |
| 110 | */ |
| 111 | 3: wrpr %g1, %cwp |
| 112 | wrpr %o5, %pstate |
| 113 | |
| 114 | 2: stx %g3, [%o0 + PT_V9_FP] |
| 115 | sllx %o5, 8, %o5 |
| 116 | stx %o5, [%o0 + PT_V9_TSTATE] |
| 117 | stx %g2, [%o0 + PT_V9_TPC] |
| 118 | add %g2, 4, %g2 |
| 119 | retl |
| 120 | stx %g2, [%o0 + PT_V9_TNPC] |
| 121 | .size perf_arch_fetch_caller_regs,.-perf_arch_fetch_caller_regs |
| 122 | #endif /* CONFIG_PERF_EVENTS */ |
| 123 | |
| David S. Miller | 6eda3a7 | 2008-04-28 00:47:20 -0700 | [diff] [blame] | 124 | #ifdef CONFIG_SMP |
| 125 | .globl hard_smp_processor_id |
| 126 | .type hard_smp_processor_id,#function |
| 127 | hard_smp_processor_id: |
| 128 | #endif |
| 129 | .globl real_hard_smp_processor_id |
| 130 | .type real_hard_smp_processor_id,#function |
| 131 | real_hard_smp_processor_id: |
| 132 | __GET_CPUID(%o0) |
| 133 | retl |
| 134 | nop |
| 135 | #ifdef CONFIG_SMP |
| 136 | .size hard_smp_processor_id,.-hard_smp_processor_id |
| 137 | #endif |
| 138 | .size real_hard_smp_processor_id,.-real_hard_smp_processor_id |