1 files changed, 89 insertions, 0 deletions

diff --git a/arch/sparc/lib/blockops.S b/arch/sparc/lib/blockops.S
new file mode 100644
index 000000000000..a7c7ffaa4a94
--- /dev/null
+++ b/arch/sparc/lib/blockops.S
@@ -0,0 +1,89 @@
+/* $Id: blockops.S,v 1.8 1998/01/30 10:58:44 jj Exp $
+ * blockops.S: Common block zero optimized routines.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/page.h>
+
+        /* Zero out 64 bytes of memory at (buf + offset).
+         * Assumes %g1 contains zero.
+         */
+#define BLAST_BLOCK(buf, offset) \
+        std     %g0, [buf + offset + 0x38]; \
+        std     %g0, [buf + offset + 0x30]; \
+        std     %g0, [buf + offset + 0x28]; \
+        std     %g0, [buf + offset + 0x20]; \
+        std     %g0, [buf + offset + 0x18]; \
+        std     %g0, [buf + offset + 0x10]; \
+        std     %g0, [buf + offset + 0x08]; \
+        std     %g0, [buf + offset + 0x00];
+
+        /* Copy 32 bytes of memory at (src + offset) to
+         * (dst + offset).
+         */
+#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
+        ldd     [src + offset + 0x18], t0; \
+        ldd     [src + offset + 0x10], t2; \
+        ldd     [src + offset + 0x08], t4; \
+        ldd     [src + offset + 0x00], t6; \
+        std     t0, [dst + offset + 0x18]; \
+        std     t2, [dst + offset + 0x10]; \
+        std     t4, [dst + offset + 0x08]; \
+        std     t6, [dst + offset + 0x00];
+
+        /* Profiling evidence indicates that memset() is
+         * commonly called for blocks of size PAGE_SIZE,
+         * and (2 * PAGE_SIZE) (for kernel stacks)
+         * and with a second arg of zero.  We assume in
+         * all of these cases that the buffer is aligned
+         * on at least an 8 byte boundary.
+         *
+         * Therefore we special case them to make them
+         * as fast as possible.
+         */
+
+        .text
+        .align  4
+        .globl  bzero_1page, __copy_1page
+
+bzero_1page:
+/* NOTE: If you change the number of insns of this routine, please check
+ * arch/sparc/mm/hypersparc.S */
+        /* %o0 = buf */
+        or      %g0, %g0, %g1
+        or      %o0, %g0, %o1
+        or      %g0, (PAGE_SIZE >> 8), %g2
+1:
+        BLAST_BLOCK(%o0, 0x00)
+        BLAST_BLOCK(%o0, 0x40)
+        BLAST_BLOCK(%o0, 0x80)
+        BLAST_BLOCK(%o0, 0xc0)
+        subcc   %g2, 1, %g2
+        bne     1b
+         add    %o0, 0x100, %o0
+
+        retl
+         nop
+
+__copy_1page:
+/* NOTE: If you change the number of insns of this routine, please check
+ * arch/sparc/mm/hypersparc.S */
+        /* %o0 = dst, %o1 = src */
+        or      %g0, (PAGE_SIZE >> 8), %g1
+1:
+        MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
+        subcc   %g1, 1, %g1
+        add     %o0, 0x100, %o0
+        bne     1b
+         add    %o1, 0x100, %o1
+
+        retl
+         nop