Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sparc / lib / U1copy_to_user.S

diff --git a/kernel/arch/sparc/lib/U1copy_to_user.S b/kernel/arch/sparc/lib/U1copy_to_user.S
new file mode 100644 (file)
index 0000000..f4b970e
--- /dev/null
+++ b/kernel/arch/sparc/lib/U1copy_to_user.S
@@ -0,0 +1,29 @@
+/* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace.
+ *
+ * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
+ */
+
+#define EX_ST(x)               \
+98:    x;                      \
+       .section __ex_table,"a";\
+       .align 4;               \
+       .word 98b, __retl_one;  \
+       .text;                  \
+       .align 4;
+
+#define FUNC_NAME              ___copy_to_user
+#define STORE(type,src,addr)   type##a src, [addr] ASI_AIUS
+#define STORE_BLK(src,addr)    stda src, [addr] ASI_BLK_AIUS
+#define EX_RETVAL(x)           0
+
+       /* Writing to %asi is _expensive_ so we hardcode it.
+        * Reading %asi to check for KERNEL_DS is comparatively
+        * cheap.
+        */
+#define PREAMBLE                                       \
+       rd              %asi, %g1;                      \
+       cmp             %g1, ASI_AIUS;                  \
+       bne,pn          %icc, ___copy_in_user;          \
+        nop;                                           \
+
+#include "U1memcpy.S"