[SPARC64]: Niagara-2 optimized copies.
The bzero/memset implementation stays the same as Niagara-1.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/lib/NG2page.S b/arch/sparc64/lib/NG2page.S
new file mode 100644
index 0000000..73b6b7c
--- /dev/null
+++ b/arch/sparc64/lib/NG2page.S
@@ -0,0 +1,61 @@
+/* NG2page.S: Niagara-2 optimized clear and copy page.
+ *
+ * Copyright (C) 2007 (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/page.h>
+#include <asm/visasm.h>
+
+ .text
+ .align 32
+
+ /* This is heavily simplified from the sun4u variants
+ * because Niagara-2 does not have any D-cache aliasing issues.
+ */
+NG2copy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */
+ prefetch [%o1 + 0x00], #one_read
+ prefetch [%o1 + 0x40], #one_read
+ VISEntryHalf
+ set PAGE_SIZE, %g7
+ sub %o0, %o1, %g3
+1: stxa %g0, [%o1 + %g3] ASI_BLK_INIT_QUAD_LDD_P
+ subcc %g7, 64, %g7
+ ldda [%o1] ASI_BLK_P, %f0
+ stda %f0, [%o1 + %g3] ASI_BLK_P
+ add %o1, 64, %o1
+ bne,pt %xcc, 1b
+ prefetch [%o1 + 0x40], #one_read
+ membar #Sync
+ VISExitHalf
+ retl
+ nop
+
+#define BRANCH_ALWAYS 0x10680000
+#define NOP 0x01000000
+#define NG_DO_PATCH(OLD, NEW) \
+ sethi %hi(NEW), %g1; \
+ or %g1, %lo(NEW), %g1; \
+ sethi %hi(OLD), %g2; \
+ or %g2, %lo(OLD), %g2; \
+ sub %g1, %g2, %g1; \
+ sethi %hi(BRANCH_ALWAYS), %g3; \
+ sll %g1, 11, %g1; \
+ srl %g1, 11 + 2, %g1; \
+ or %g3, %lo(BRANCH_ALWAYS), %g3; \
+ or %g3, %g1, %g3; \
+ stw %g3, [%g2]; \
+ sethi %hi(NOP), %g3; \
+ or %g3, %lo(NOP), %g3; \
+ stw %g3, [%g2 + 0x4]; \
+ flush %g2;
+
+ .globl niagara2_patch_pageops
+ .type niagara2_patch_pageops,#function
+niagara2_patch_pageops:
+ NG_DO_PATCH(copy_user_page, NG2copy_user_page)
+ NG_DO_PATCH(_clear_page, NGclear_page)
+ NG_DO_PATCH(clear_user_page, NGclear_user_page)
+ retl
+ nop
+ .size niagara2_patch_pageops,.-niagara2_patch_pageops