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Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
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1 | /* NGpage.S: Niagara optimize clear and copy page. |
2 | * |
3 | * Copyright (C) 2006 (davem@davemloft.net) |
4 | */ |
5 | |
6 | #include <asm/asi.h> |
7 | #include <asm/page.h> |
8 | |
9 | .text |
10 | .align 32 |
11 | |
12 | /* This is heavily simplified from the sun4u variants |
13 | * because Niagara does not have any D-cache aliasing issues |
14 | * and also we don't need to use the FPU in order to implement |
15 | * an optimal page copy/clear. |
16 | */ |
17 | |
18 | NGcopy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */ |
19 | save %sp, -192, %sp |
20 | rd %asi, %g3 |
21 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
22 | set PAGE_SIZE, %g7 |
23 | prefetch [%i1 + 0x00], #one_read |
24 | prefetch [%i1 + 0x40], #one_read |
25 | |
26 | 1: prefetch [%i1 + 0x80], #one_read |
27 | prefetch [%i1 + 0xc0], #one_read |
28 | ldda [%i1 + 0x00] %asi, %o2 |
29 | ldda [%i1 + 0x10] %asi, %o4 |
30 | ldda [%i1 + 0x20] %asi, %l2 |
31 | ldda [%i1 + 0x30] %asi, %l4 |
32 | stxa %o2, [%i0 + 0x00] %asi |
33 | stxa %o3, [%i0 + 0x08] %asi |
34 | stxa %o4, [%i0 + 0x10] %asi |
35 | stxa %o5, [%i0 + 0x18] %asi |
36 | stxa %l2, [%i0 + 0x20] %asi |
37 | stxa %l3, [%i0 + 0x28] %asi |
38 | stxa %l4, [%i0 + 0x30] %asi |
39 | stxa %l5, [%i0 + 0x38] %asi |
40 | ldda [%i1 + 0x40] %asi, %o2 |
41 | ldda [%i1 + 0x50] %asi, %o4 |
42 | ldda [%i1 + 0x60] %asi, %l2 |
43 | ldda [%i1 + 0x70] %asi, %l4 |
44 | stxa %o2, [%i0 + 0x40] %asi |
45 | stxa %o3, [%i0 + 0x48] %asi |
46 | stxa %o4, [%i0 + 0x50] %asi |
47 | stxa %o5, [%i0 + 0x58] %asi |
48 | stxa %l2, [%i0 + 0x60] %asi |
49 | stxa %l3, [%i0 + 0x68] %asi |
50 | stxa %l4, [%i0 + 0x70] %asi |
51 | stxa %l5, [%i0 + 0x78] %asi |
52 | add %i1, 128, %i1 |
53 | subcc %g7, 128, %g7 |
54 | bne,pt %xcc, 1b |
55 | add %i0, 128, %i0 |
56 | wr %g3, 0x0, %asi |
57 | membar #Sync |
58 | ret |
59 | restore |
60 | |
61 | .align 32 |
62 | NGclear_page: /* %o0=dest */ |
63 | NGclear_user_page: /* %o0=dest, %o1=vaddr */ |
64 | rd %asi, %g3 |
65 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
66 | set PAGE_SIZE, %g7 |
67 | |
68 | 1: stxa %g0, [%o0 + 0x00] %asi |
69 | stxa %g0, [%o0 + 0x08] %asi |
70 | stxa %g0, [%o0 + 0x10] %asi |
71 | stxa %g0, [%o0 + 0x18] %asi |
72 | stxa %g0, [%o0 + 0x20] %asi |
73 | stxa %g0, [%o0 + 0x28] %asi |
74 | stxa %g0, [%o0 + 0x30] %asi |
75 | stxa %g0, [%o0 + 0x38] %asi |
76 | stxa %g0, [%o0 + 0x40] %asi |
77 | stxa %g0, [%o0 + 0x48] %asi |
78 | stxa %g0, [%o0 + 0x50] %asi |
79 | stxa %g0, [%o0 + 0x58] %asi |
80 | stxa %g0, [%o0 + 0x60] %asi |
81 | stxa %g0, [%o0 + 0x68] %asi |
82 | stxa %g0, [%o0 + 0x70] %asi |
83 | stxa %g0, [%o0 + 0x78] %asi |
84 | stxa %g0, [%o0 + 0x80] %asi |
85 | stxa %g0, [%o0 + 0x88] %asi |
86 | stxa %g0, [%o0 + 0x90] %asi |
87 | stxa %g0, [%o0 + 0x98] %asi |
88 | stxa %g0, [%o0 + 0xa0] %asi |
89 | stxa %g0, [%o0 + 0xa8] %asi |
90 | stxa %g0, [%o0 + 0xb0] %asi |
91 | stxa %g0, [%o0 + 0xb8] %asi |
92 | stxa %g0, [%o0 + 0xc0] %asi |
93 | stxa %g0, [%o0 + 0xc8] %asi |
94 | stxa %g0, [%o0 + 0xd0] %asi |
95 | stxa %g0, [%o0 + 0xd8] %asi |
96 | stxa %g0, [%o0 + 0xe0] %asi |
97 | stxa %g0, [%o0 + 0xe8] %asi |
98 | stxa %g0, [%o0 + 0xf0] %asi |
99 | stxa %g0, [%o0 + 0xf8] %asi |
100 | subcc %g7, 256, %g7 |
101 | bne,pt %xcc, 1b |
102 | add %o0, 256, %o0 |
103 | wr %g3, 0x0, %asi |
104 | membar #Sync |
105 | retl |
106 | nop |
107 | |
108 | #define BRANCH_ALWAYS 0x10680000 |
109 | #define NOP 0x01000000 |
110 | #define NG_DO_PATCH(OLD, NEW) \ |
111 | sethi %hi(NEW), %g1; \ |
112 | or %g1, %lo(NEW), %g1; \ |
113 | sethi %hi(OLD), %g2; \ |
114 | or %g2, %lo(OLD), %g2; \ |
115 | sub %g1, %g2, %g1; \ |
116 | sethi %hi(BRANCH_ALWAYS), %g3; \ |
117 | sll %g1, 11, %g1; \ |
118 | srl %g1, 11 + 2, %g1; \ |
119 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
120 | or %g3, %g1, %g3; \ |
121 | stw %g3, [%g2]; \ |
122 | sethi %hi(NOP), %g3; \ |
123 | or %g3, %lo(NOP), %g3; \ |
124 | stw %g3, [%g2 + 0x4]; \ |
125 | flush %g2; |
126 | |
127 | .globl niagara_patch_pageops |
128 | .type niagara_patch_pageops,#function |
129 | niagara_patch_pageops: |
130 | NG_DO_PATCH(copy_user_page, NGcopy_user_page) |
131 | NG_DO_PATCH(_clear_page, NGclear_page) |
132 | NG_DO_PATCH(clear_user_page, NGclear_user_page) |
133 | retl |
134 | nop |
135 | .size niagara_patch_pageops,.-niagara_patch_pageops |
136 |
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