Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/m32r/mm/page.S | |
3 | * | |
4 | * Clear/Copy page with CPU | |
5 | * | |
6 | * Copyright (C) 2004 The Free Software Initiative of Japan | |
7 | * | |
8 | * Written by Niibe Yutaka | |
9 | * | |
10 | * This file is subject to the terms and conditions of the GNU General Public | |
11 | * License. See the file "COPYING" in the main directory of this archive | |
12 | * for more details. | |
13 | * | |
14 | */ | |
15 | .text | |
16 | .global copy_page | |
17 | /* | |
18 | * copy_page (to, from) | |
19 | * | |
20 | * PAGE_SIZE = 4096-byte | |
21 | * Cache line = 16-byte | |
22 | * 16 * 256 | |
23 | */ | |
24 | .align 4 | |
25 | copy_page: | |
26 | ldi r2, #255 | |
27 | ld r3, @r0 /* cache line allocate */ | |
28 | ld r4, @r1+ | |
29 | ld r5, @r1+ | |
30 | ld r6, @r1+ | |
31 | ld r7, @r1+ | |
32 | .fillinsn | |
33 | 0: | |
34 | st r4, @r0 | |
35 | st r5, @+r0 | |
36 | st r6, @+r0 | |
37 | st r7, @+r0 | |
38 | ld r4, @r1+ | |
39 | addi r0, #4 | |
40 | ld r5, @r1+ | |
41 | ld r6, @r1+ | |
42 | ld r7, @r1+ | |
43 | ld r3, @r0 /* cache line allocate */ | |
44 | addi r2, #-1 | |
45 | bnez r2, 0b | |
46 | ||
47 | st r4, @r0 | |
48 | st r5, @+r0 | |
49 | st r6, @+r0 | |
50 | st r7, @+r0 | |
51 | jmp r14 | |
52 | ||
53 | .text | |
54 | .global clear_page | |
55 | /* | |
56 | * clear_page (to) | |
57 | * | |
58 | * PAGE_SIZE = 4096-byte | |
59 | * Cache line = 16-byte | |
60 | * 16 * 256 | |
61 | */ | |
62 | .align 4 | |
63 | clear_page: | |
64 | ldi r2, #255 | |
65 | ldi r4, #0 | |
66 | ld r3, @r0 /* cache line allocate */ | |
67 | .fillinsn | |
68 | 0: | |
69 | st r4, @r0 | |
70 | st r4, @+r0 | |
71 | st r4, @+r0 | |
72 | st r4, @+r0 | |
73 | addi r0, #4 | |
74 | ld r3, @r0 /* cache line allocate */ | |
75 | addi r2, #-1 | |
76 | bnez r2, 0b | |
77 | ||
78 | st r4, @r0 | |
79 | st r4, @+r0 | |
80 | st r4, @+r0 | |
81 | st r4, @+r0 | |
82 | jmp r14 |