diff options
Diffstat (limited to 'kernel/arch/sparc/kernel/helpers.S')
-rw-r--r-- | kernel/arch/sparc/kernel/helpers.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/kernel/arch/sparc/kernel/helpers.S b/kernel/arch/sparc/kernel/helpers.S new file mode 100644 index 000000000..314dd0c9f --- /dev/null +++ b/kernel/arch/sparc/kernel/helpers.S @@ -0,0 +1,63 @@ + .align 32 + .globl __flushw_user + .type __flushw_user,#function +__flushw_user: + rdpr %otherwin, %g1 + brz,pn %g1, 2f + clr %g2 +1: save %sp, -128, %sp + rdpr %otherwin, %g1 + brnz,pt %g1, 1b + add %g2, 1, %g2 +1: sub %g2, 1, %g2 + brnz,pt %g2, 1b + restore %g0, %g0, %g0 +2: retl + nop + .size __flushw_user,.-__flushw_user + + /* Flush %fp and %i7 to the stack for all register + * windows active inside of the cpu. This allows + * show_stack_trace() to avoid using an expensive + * 'flushw'. + */ + .globl stack_trace_flush + .type stack_trace_flush,#function +stack_trace_flush: + rdpr %pstate, %o0 + wrpr %o0, PSTATE_IE, %pstate + + rdpr %cwp, %g1 + rdpr %canrestore, %g2 + sub %g1, 1, %g3 + +1: brz,pn %g2, 2f + sub %g2, 1, %g2 + wrpr %g3, %cwp + stx %fp, [%sp + STACK_BIAS + RW_V9_I6] + stx %i7, [%sp + STACK_BIAS + RW_V9_I7] + ba,pt %xcc, 1b + sub %g3, 1, %g3 + +2: wrpr %g1, %cwp + wrpr %o0, %pstate + + retl + nop + .size stack_trace_flush,.-stack_trace_flush + +#ifdef CONFIG_SMP + .globl hard_smp_processor_id + .type hard_smp_processor_id,#function +hard_smp_processor_id: +#endif + .globl real_hard_smp_processor_id + .type real_hard_smp_processor_id,#function +real_hard_smp_processor_id: + __GET_CPUID(%o0) + retl + nop +#ifdef CONFIG_SMP + .size hard_smp_processor_id,.-hard_smp_processor_id +#endif + .size real_hard_smp_processor_id,.-real_hard_smp_processor_id |