[SPARC64]: Add GET_GL_GLOBAL() macro for SUN4V.

So we can read the %gl register for debugging. Signed-off-by: David S. Miller <davem@davemloft.net>
git-mirror · Mar 20, 2006 · 4ff7ac4 · 4ff7ac4
1 parent 22780e2
commit 4ff7ac4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/asm-sparc64/head.h b/include/asm-sparc64/head.h
@@ -8,6 +8,10 @@
 #define SET_GL(val)	\
 	.word	0xa1902000 | val
 
+	/* rdpr %gl, %gN */
+#define GET_GL_GLOBAL(N)	\
+	.word	0x81540000 | (N << 25)
+
 #define KERNBASE	0x400000
 
 #define	PTREGS_OFF	(STACK_BIAS + STACKFRAME_SZ)