sparc32,leon: added some SMP comments
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/winmacro.h b/arch/sparc/include/asm/winmacro.h
index 5b0a06d..a9be04b 100644
--- a/arch/sparc/include/asm/winmacro.h
+++ b/arch/sparc/include/asm/winmacro.h
@@ -103,6 +103,7 @@
st %scratch, [%cur_reg + TI_W_SAVED];
#ifdef CONFIG_SMP
+/* Results of LOAD_CURRENT() after BTFIXUP for SUN4M, SUN4D & LEON (comments) */
#define LOAD_CURRENT4M(dest_reg, idreg) \
rd %tbr, %idreg; \
sethi %hi(current_set), %dest_reg; \
@@ -118,6 +119,14 @@
or %dest_reg, %lo(C_LABEL(current_set)), %dest_reg; \
ld [%idreg + %dest_reg], %dest_reg;
+#define LOAD_CURRENT_LEON(dest_reg, idreg) \
+ rd %asr17, %idreg; \
+ sethi %hi(current_set), %dest_reg; \
+ srl %idreg, 0x1c, %idreg; \
+ or %dest_reg, %lo(current_set), %dest_reg; \
+ sll %idreg, 0x2, %idreg; \
+ ld [%idreg + %dest_reg], %dest_reg;
+
/* Blackbox - take care with this... - check smp4m and smp4d before changing this. */
#define LOAD_CURRENT(dest_reg, idreg) \
sethi %hi(___b_load_current), %idreg; \