summaryrefslogtreecommitdiff
path: root/arch/sparc/lib/NG4clear_page.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/lib/NG4clear_page.S')
-rw-r--r--arch/sparc/lib/NG4clear_page.S29
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