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