Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sparc/lib/blockops.S b/arch/sparc/lib/blockops.S
new file mode 100644
index 0000000..a7c7ffa
--- /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