1 files changed, 54 insertions, 0 deletions

diff --git a/arch/alpha/lib/ev6-clear_page.S b/arch/alpha/lib/ev6-clear_page.S
new file mode 100644
index 000000000000..adf4f7be0e2b
--- /dev/null
+++ b/arch/alpha/lib/ev6-clear_page.S
@@ -0,0 +1,54 @@
+/*
+ * arch/alpha/lib/ev6-clear_page.S
+ *
+ * Zero an entire page.
+ */
+
+        .text
+        .align 4
+        .global clear_page
+        .ent clear_page
+clear_page:
+        .prologue 0
+
+        lda     $0,128
+        lda     $1,125
+        addq    $16,64,$2
+        addq    $16,128,$3
+
+        addq    $16,192,$17
+        wh64    ($16)
+        wh64    ($2)
+        wh64    ($3)
+
+1:      wh64    ($17)
+        stq     $31,0($16)
+        subq    $0,1,$0
+        subq    $1,1,$1
+
+        stq     $31,8($16)
+        stq     $31,16($16)
+        addq    $17,64,$2
+        nop
+
+        stq     $31,24($16)
+        stq     $31,32($16)
+        cmovgt  $1,$2,$17
+        nop
+
+        stq     $31,40($16)
+        stq     $31,48($16)
+        nop
+        nop
+
+        stq     $31,56($16)
+        addq    $16,64,$16
+        nop
+        bne     $0,1b
+
+        ret
+        nop
+        nop
+        nop
+
+        .end clear_page