summaryrefslogtreecommitdiffstats
path: root/arch/sparc/lib/NGcopy_from_user.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/lib/NGcopy_from_user.S')
-rw-r--r--arch/sparc/lib/NGcopy_from_user.S37
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/sparc/lib/NGcopy_from_user.S b/arch/sparc/lib/NGcopy_from_user.S
new file mode 100644
index 00000000000..e7f433f71b4
--- /dev/null
+++ b/arch/sparc/lib/NGcopy_from_user.S
@@ -0,0 +1,37 @@
+/* NGcopy_from_user.S: Niagara optimized copy from userspace.
+ *
+ * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
+ */
+
+#define EX_LD(x) \
+98: x; \
+ .section .fixup; \
+ .align 4; \
+99: wr %g0, ASI_AIUS, %asi;\
+ ret; \
+ restore %g0, 1, %o0; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, 99b; \
+ .text; \
+ .align 4;
+
+#ifndef ASI_AIUS
+#define ASI_AIUS 0x11
+#endif
+
+#define FUNC_NAME NGcopy_from_user
+#define LOAD(type,addr,dest) type##a [addr] ASI_AIUS, dest
+#define LOAD_TWIN(addr_reg,dest0,dest1) \
+ ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_AIUS, dest0
+#define EX_RETVAL(x) %g0
+
+#ifdef __KERNEL__
+#define PREAMBLE \
+ rd %asi, %g1; \
+ cmp %g1, ASI_AIUS; \
+ bne,pn %icc, memcpy_user_stub; \
+ nop
+#endif
+
+#include "NGmemcpy.S"