1 files changed, 63 insertions, 0 deletions

diff --git a/arch/sparc/kernel/helpers.S b/arch/sparc/kernel/helpers.S
new file mode 100644
index 000000000000..314dd0c9fc5b
--- /dev/null
+++ b/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