1 files changed, 29 insertions, 0 deletions

diff --git a/arch/sparc/lib/NG4clear_page.S b/arch/sparc/lib/NG4clear_page.S
new file mode 100644
index 000000000000..e16c88204a42
--- /dev/null
+++ b/arch/sparc/lib/NG4clear_page.S
@@ -0,0 +1,29 @@
+/* NG4copy_page.S: Niagara-4 optimized clear page.
+ *
+ * Copyright (C) 2012 (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/page.h>
+
+        .text
+
+        .register       %g3, #scratch
+
+        .align          32
+        .globl          NG4clear_page
+        .globl          NG4clear_user_page
+NG4clear_page:          /* %o0=dest */
+NG4clear_user_page:     /* %o0=dest, %o1=vaddr */
+        set             PAGE_SIZE, %g7
+        mov             0x20, %g3
+1:      stxa            %g0, [%o0 + %g0] ASI_ST_BLKINIT_MRU_P
+        subcc           %g7, 0x40, %g7
+        stxa            %g0, [%o0 + %g3] ASI_ST_BLKINIT_MRU_P
+        bne,pt          %xcc, 1b
+         add            %o0, 0x40, %o0
+        membar          #StoreLoad|#StoreStore
+        retl
+         nop
+        .size           NG4clear_page,.-NG4clear_page
+        .size           NG4clear_user_page,.-NG4clear_user_page
\ No newline at end of file