arch/sparc/kernel/helpers.S

   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 EXPORT_SYMBOL(__flushw_user)
  19
  20         /* Flush %fp and %i7 to the stack for all register
  21          * windows active inside of the cpu.  This allows
  22          * show_stack_trace() to avoid using an expensive
  23          * 'flushw'.
  24          */
  25         .globl          stack_trace_flush
  26         .type           stack_trace_flush,#function
  27 stack_trace_flush:
  28         rdpr            %pstate, %o0
  29         wrpr            %o0, PSTATE_IE, %pstate
  30
  31         rdpr            %cwp, %g1
  32         rdpr            %canrestore, %g2
  33         sub             %g1, 1, %g3
  34
  35 1:      brz,pn          %g2, 2f
  36          sub            %g2, 1, %g2
  37         wrpr            %g3, %cwp
  38         stx             %fp, [%sp + STACK_BIAS + RW_V9_I6]
  39         stx             %i7, [%sp + STACK_BIAS + RW_V9_I7]
  40         ba,pt           %xcc, 1b
  41          sub            %g3, 1, %g3
  42
  43 2:      wrpr            %g1, %cwp
  44         wrpr            %o0, %pstate
  45
  46         retl
  47          nop
  48         .size           stack_trace_flush,.-stack_trace_flush
  49
  50 #ifdef CONFIG_SMP
  51         .globl          hard_smp_processor_id
  52         .type           hard_smp_processor_id,#function
  53 hard_smp_processor_id:
  54 #endif
  55         .globl          real_hard_smp_processor_id
  56         .type           real_hard_smp_processor_id,#function
  57 real_hard_smp_processor_id:
  58         __GET_CPUID(%o0)
  59         retl
  60          nop
  61 #ifdef CONFIG_SMP
  62         .size           hard_smp_processor_id,.-hard_smp_processor_id
  63 #endif
  64         .size           real_hard_smp_processor_id,.-real_hard_smp_processor_id
  65 EXPORT_SYMBOL_GPL(real_hard_smp_processor_id)