1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* NGpage.S: Niagara optimize clear and copy page. |
3 | * |
4 | * Copyright (C) 2006 (davem@davemloft.net) |
5 | */ |
6 | |
7 | #include <asm/asi.h> |
8 | #include <asm/page.h> |
9 | |
10 | .text |
11 | .align 32 |
12 | |
13 | /* This is heavily simplified from the sun4u variants |
14 | * because Niagara does not have any D-cache aliasing issues |
15 | * and also we don't need to use the FPU in order to implement |
16 | * an optimal page copy/clear. |
17 | */ |
18 | |
19 | NGcopy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */ |
20 | save %sp, -192, %sp |
21 | rd %asi, %g3 |
22 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
23 | set PAGE_SIZE, %g7 |
24 | prefetch [%i1 + 0x00], #one_read |
25 | prefetch [%i1 + 0x40], #one_read |
26 | |
27 | 1: prefetch [%i1 + 0x80], #one_read |
28 | prefetch [%i1 + 0xc0], #one_read |
29 | ldda [%i1 + 0x00] %asi, %o2 |
30 | ldda [%i1 + 0x10] %asi, %o4 |
31 | ldda [%i1 + 0x20] %asi, %l2 |
32 | ldda [%i1 + 0x30] %asi, %l4 |
33 | stxa %o2, [%i0 + 0x00] %asi |
34 | stxa %o3, [%i0 + 0x08] %asi |
35 | stxa %o4, [%i0 + 0x10] %asi |
36 | stxa %o5, [%i0 + 0x18] %asi |
37 | stxa %l2, [%i0 + 0x20] %asi |
38 | stxa %l3, [%i0 + 0x28] %asi |
39 | stxa %l4, [%i0 + 0x30] %asi |
40 | stxa %l5, [%i0 + 0x38] %asi |
41 | ldda [%i1 + 0x40] %asi, %o2 |
42 | ldda [%i1 + 0x50] %asi, %o4 |
43 | ldda [%i1 + 0x60] %asi, %l2 |
44 | ldda [%i1 + 0x70] %asi, %l4 |
45 | stxa %o2, [%i0 + 0x40] %asi |
46 | stxa %o3, [%i0 + 0x48] %asi |
47 | stxa %o4, [%i0 + 0x50] %asi |
48 | stxa %o5, [%i0 + 0x58] %asi |
49 | stxa %l2, [%i0 + 0x60] %asi |
50 | stxa %l3, [%i0 + 0x68] %asi |
51 | stxa %l4, [%i0 + 0x70] %asi |
52 | stxa %l5, [%i0 + 0x78] %asi |
53 | add %i1, 128, %i1 |
54 | subcc %g7, 128, %g7 |
55 | bne,pt %xcc, 1b |
56 | add %i0, 128, %i0 |
57 | wr %g3, 0x0, %asi |
58 | membar #Sync |
59 | ret |
60 | restore |
61 | |
62 | .align 32 |
63 | .globl NGclear_page |
64 | .globl NGclear_user_page |
65 | NGclear_page: /* %o0=dest */ |
66 | NGclear_user_page: /* %o0=dest, %o1=vaddr */ |
67 | rd %asi, %g3 |
68 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi |
69 | set PAGE_SIZE, %g7 |
70 | |
71 | 1: stxa %g0, [%o0 + 0x00] %asi |
72 | stxa %g0, [%o0 + 0x08] %asi |
73 | stxa %g0, [%o0 + 0x10] %asi |
74 | stxa %g0, [%o0 + 0x18] %asi |
75 | stxa %g0, [%o0 + 0x20] %asi |
76 | stxa %g0, [%o0 + 0x28] %asi |
77 | stxa %g0, [%o0 + 0x30] %asi |
78 | stxa %g0, [%o0 + 0x38] %asi |
79 | stxa %g0, [%o0 + 0x40] %asi |
80 | stxa %g0, [%o0 + 0x48] %asi |
81 | stxa %g0, [%o0 + 0x50] %asi |
82 | stxa %g0, [%o0 + 0x58] %asi |
83 | stxa %g0, [%o0 + 0x60] %asi |
84 | stxa %g0, [%o0 + 0x68] %asi |
85 | stxa %g0, [%o0 + 0x70] %asi |
86 | stxa %g0, [%o0 + 0x78] %asi |
87 | stxa %g0, [%o0 + 0x80] %asi |
88 | stxa %g0, [%o0 + 0x88] %asi |
89 | stxa %g0, [%o0 + 0x90] %asi |
90 | stxa %g0, [%o0 + 0x98] %asi |
91 | stxa %g0, [%o0 + 0xa0] %asi |
92 | stxa %g0, [%o0 + 0xa8] %asi |
93 | stxa %g0, [%o0 + 0xb0] %asi |
94 | stxa %g0, [%o0 + 0xb8] %asi |
95 | stxa %g0, [%o0 + 0xc0] %asi |
96 | stxa %g0, [%o0 + 0xc8] %asi |
97 | stxa %g0, [%o0 + 0xd0] %asi |
98 | stxa %g0, [%o0 + 0xd8] %asi |
99 | stxa %g0, [%o0 + 0xe0] %asi |
100 | stxa %g0, [%o0 + 0xe8] %asi |
101 | stxa %g0, [%o0 + 0xf0] %asi |
102 | stxa %g0, [%o0 + 0xf8] %asi |
103 | subcc %g7, 256, %g7 |
104 | bne,pt %xcc, 1b |
105 | add %o0, 256, %o0 |
106 | wr %g3, 0x0, %asi |
107 | membar #Sync |
108 | retl |
109 | nop |
110 | |
111 | #define BRANCH_ALWAYS 0x10680000 |
112 | #define NOP 0x01000000 |
113 | #define NG_DO_PATCH(OLD, NEW) \ |
114 | sethi %hi(NEW), %g1; \ |
115 | or %g1, %lo(NEW), %g1; \ |
116 | sethi %hi(OLD), %g2; \ |
117 | or %g2, %lo(OLD), %g2; \ |
118 | sub %g1, %g2, %g1; \ |
119 | sethi %hi(BRANCH_ALWAYS), %g3; \ |
120 | sll %g1, 11, %g1; \ |
121 | srl %g1, 11 + 2, %g1; \ |
122 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
123 | or %g3, %g1, %g3; \ |
124 | stw %g3, [%g2]; \ |
125 | sethi %hi(NOP), %g3; \ |
126 | or %g3, %lo(NOP), %g3; \ |
127 | stw %g3, [%g2 + 0x4]; \ |
128 | flush %g2; |
129 | |
130 | .globl niagara_patch_pageops |
131 | .type niagara_patch_pageops,#function |
132 | niagara_patch_pageops: |
133 | NG_DO_PATCH(copy_user_page, NGcopy_user_page) |
134 | NG_DO_PATCH(_clear_page, NGclear_page) |
135 | NG_DO_PATCH(clear_user_page, NGclear_user_page) |
136 | retl |
137 | nop |
138 | .size niagara_patch_pageops,.-niagara_patch_pageops |
139 | |