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1/*
2 * blockops.S: Common block zero optimized routines.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#include <asm/page.h>
8
9 /* Zero out 64 bytes of memory at (buf + offset).
10 * Assumes %g1 contains zero.
11 */
12#define BLAST_BLOCK(buf, offset) \
13 std %g0, [buf + offset + 0x38]; \
14 std %g0, [buf + offset + 0x30]; \
15 std %g0, [buf + offset + 0x28]; \
16 std %g0, [buf + offset + 0x20]; \
17 std %g0, [buf + offset + 0x18]; \
18 std %g0, [buf + offset + 0x10]; \
19 std %g0, [buf + offset + 0x08]; \
20 std %g0, [buf + offset + 0x00];
21
22 /* Copy 32 bytes of memory at (src + offset) to
23 * (dst + offset).
24 */
25#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
26 ldd [src + offset + 0x18], t0; \
27 ldd [src + offset + 0x10], t2; \
28 ldd [src + offset + 0x08], t4; \
29 ldd [src + offset + 0x00], t6; \
30 std t0, [dst + offset + 0x18]; \
31 std t2, [dst + offset + 0x10]; \
32 std t4, [dst + offset + 0x08]; \
33 std t6, [dst + offset + 0x00];
34
35 /* Profiling evidence indicates that memset() is
36 * commonly called for blocks of size PAGE_SIZE,
37 * and (2 * PAGE_SIZE) (for kernel stacks)
38 * and with a second arg of zero. We assume in
39 * all of these cases that the buffer is aligned
40 * on at least an 8 byte boundary.
41 *
42 * Therefore we special case them to make them
43 * as fast as possible.
44 */
45
46 .text
47 .align 4
48 .globl bzero_1page, __copy_1page
49
50bzero_1page:
51/* NOTE: If you change the number of insns of this routine, please check
52 * arch/sparc/mm/hypersparc.S */
53 /* %o0 = buf */
54 or %g0, %g0, %g1
55 or %o0, %g0, %o1
56 or %g0, (PAGE_SIZE >> 8), %g2
571:
58 BLAST_BLOCK(%o0, 0x00)
59 BLAST_BLOCK(%o0, 0x40)
60 BLAST_BLOCK(%o0, 0x80)
61 BLAST_BLOCK(%o0, 0xc0)
62 subcc %g2, 1, %g2
63 bne 1b
64 add %o0, 0x100, %o0
65
66 retl
67 nop
68
69__copy_1page:
70/* NOTE: If you change the number of insns of this routine, please check
71 * arch/sparc/mm/hypersparc.S */
72 /* %o0 = dst, %o1 = src */
73 or %g0, (PAGE_SIZE >> 8), %g1
741:
75 MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
76 MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
77 MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
78 MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
79 MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
80 MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
81 MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
82 MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
83 subcc %g1, 1, %g1
84 add %o0, 0x100, %o0
85 bne 1b
86 add %o1, 0x100, %o1
87
88 retl
89 nop
1/*
2 * blockops.S: Common block zero optimized routines.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#include <linux/linkage.h>
8#include <asm/page.h>
9
10 /* Zero out 64 bytes of memory at (buf + offset).
11 * Assumes %g1 contains zero.
12 */
13#define BLAST_BLOCK(buf, offset) \
14 std %g0, [buf + offset + 0x38]; \
15 std %g0, [buf + offset + 0x30]; \
16 std %g0, [buf + offset + 0x28]; \
17 std %g0, [buf + offset + 0x20]; \
18 std %g0, [buf + offset + 0x18]; \
19 std %g0, [buf + offset + 0x10]; \
20 std %g0, [buf + offset + 0x08]; \
21 std %g0, [buf + offset + 0x00];
22
23 /* Copy 32 bytes of memory at (src + offset) to
24 * (dst + offset).
25 */
26#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
27 ldd [src + offset + 0x18], t0; \
28 ldd [src + offset + 0x10], t2; \
29 ldd [src + offset + 0x08], t4; \
30 ldd [src + offset + 0x00], t6; \
31 std t0, [dst + offset + 0x18]; \
32 std t2, [dst + offset + 0x10]; \
33 std t4, [dst + offset + 0x08]; \
34 std t6, [dst + offset + 0x00];
35
36 /* Profiling evidence indicates that memset() is
37 * commonly called for blocks of size PAGE_SIZE,
38 * and (2 * PAGE_SIZE) (for kernel stacks)
39 * and with a second arg of zero. We assume in
40 * all of these cases that the buffer is aligned
41 * on at least an 8 byte boundary.
42 *
43 * Therefore we special case them to make them
44 * as fast as possible.
45 */
46
47 .text
48ENTRY(bzero_1page)
49/* NOTE: If you change the number of insns of this routine, please check
50 * arch/sparc/mm/hypersparc.S */
51 /* %o0 = buf */
52 or %g0, %g0, %g1
53 or %o0, %g0, %o1
54 or %g0, (PAGE_SIZE >> 8), %g2
551:
56 BLAST_BLOCK(%o0, 0x00)
57 BLAST_BLOCK(%o0, 0x40)
58 BLAST_BLOCK(%o0, 0x80)
59 BLAST_BLOCK(%o0, 0xc0)
60 subcc %g2, 1, %g2
61 bne 1b
62 add %o0, 0x100, %o0
63
64 retl
65 nop
66ENDPROC(bzero_1page)
67
68ENTRY(__copy_1page)
69/* NOTE: If you change the number of insns of this routine, please check
70 * arch/sparc/mm/hypersparc.S */
71 /* %o0 = dst, %o1 = src */
72 or %g0, (PAGE_SIZE >> 8), %g1
731:
74 MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
75 MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
76 MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
77 MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
78 MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
79 MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
80 MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
81 MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5, %g2, %g3, %g4, %g5)
82 subcc %g1, 1, %g1
83 add %o0, 0x100, %o0
84 bne 1b
85 add %o1, 0x100, %o1
86
87 retl
88 nop
89ENDPROC(__copy_1page)