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 prefetch [%o1 + 0x00], #one_read
21 rd %asi, %g3 !! 20 mov 8, %g1
22 wr %g0, ASI_BLK_INIT_QUAD !! 21 mov 16, %g2
>> 22 mov 24, %g3
23 set PAGE_SIZE, %g7 23 set PAGE_SIZE, %g7
24 prefetch [%i1 + 0x00], #one_rea <<
25 prefetch [%i1 + 0x40], #one_rea <<
26 24
27 1: prefetch [%i1 + 0x80], #one_rea !! 25 1: ldda [%o1 + %g0] ASI_BLK_INIT_QUAD_LDD_P, %o2
28 prefetch [%i1 + 0xc0], #one_rea !! 26 ldda [%o1 + %g2] ASI_BLK_INIT_QUAD_LDD_P, %o4
29 ldda [%i1 + 0x00] %asi, %o2 !! 27 prefetch [%o1 + 0x40], #one_read
30 ldda [%i1 + 0x10] %asi, %o4 !! 28 add %o1, 32, %o1
31 ldda [%i1 + 0x20] %asi, %l2 !! 29 stxa %o2, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
32 ldda [%i1 + 0x30] %asi, %l4 !! 30 stxa %o3, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P
33 stxa %o2, [%i0 + 0x00] %asi !! 31 ldda [%o1 + %g0] ASI_BLK_INIT_QUAD_LDD_P, %o2
34 stxa %o3, [%i0 + 0x08] %asi !! 32 stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
35 stxa %o4, [%i0 + 0x10] %asi !! 33 stxa %o5, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
36 stxa %o5, [%i0 + 0x18] %asi !! 34 ldda [%o1 + %g2] ASI_BLK_INIT_QUAD_LDD_P, %o4
37 stxa %l2, [%i0 + 0x20] %asi !! 35 add %o1, 32, %o1
38 stxa %l3, [%i0 + 0x28] %asi !! 36 add %o0, 32, %o0
39 stxa %l4, [%i0 + 0x30] %asi !! 37 stxa %o2, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
40 stxa %l5, [%i0 + 0x38] %asi !! 38 stxa %o3, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P
41 ldda [%i1 + 0x40] %asi, %o2 !! 39 stxa %o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
42 ldda [%i1 + 0x50] %asi, %o4 !! 40 stxa %o5, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
43 ldda [%i1 + 0x60] %asi, %l2 !! 41 subcc %g7, 64, %g7
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 42 bne,pt %xcc, 1b
56 add %i0, 128, %i0 !! 43 add %o0, 32, %o0
57 wr %g3, 0x0, %asi <<
58 membar #Sync 44 membar #Sync
59 ret !! 45 retl
60 restore !! 46 nop
61 47
62 .align 32 !! 48 .globl NGclear_page, NGclear_user_page
63 .globl NGclear_page <<
64 .globl NGclear_user_page <<
65 NGclear_page: /* %o0=dest */ 49 NGclear_page: /* %o0=dest */
66 NGclear_user_page: /* %o0=dest, %o1=vaddr 50 NGclear_user_page: /* %o0=dest, %o1=vaddr */
67 rd %asi, %g3 !! 51 mov 8, %g1
68 wr %g0, ASI_BLK_INIT_QUAD !! 52 mov 16, %g2
>> 53 mov 24, %g3
69 set PAGE_SIZE, %g7 54 set PAGE_SIZE, %g7
70 55
71 1: stxa %g0, [%o0 + 0x00] %asi !! 56 1: stxa %g0, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
72 stxa %g0, [%o0 + 0x08] %asi !! 57 stxa %g0, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P
73 stxa %g0, [%o0 + 0x10] %asi !! 58 stxa %g0, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
74 stxa %g0, [%o0 + 0x18] %asi !! 59 stxa %g0, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
75 stxa %g0, [%o0 + 0x20] %asi !! 60 add %o0, 32, %o0
76 stxa %g0, [%o0 + 0x28] %asi !! 61 stxa %g0, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
77 stxa %g0, [%o0 + 0x30] %asi !! 62 stxa %g0, [%o0 + %g1] ASI_BLK_INIT_QUAD_LDD_P
78 stxa %g0, [%o0 + 0x38] %asi !! 63 stxa %g0, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
79 stxa %g0, [%o0 + 0x40] %asi !! 64 stxa %g0, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
80 stxa %g0, [%o0 + 0x48] %asi !! 65 subcc %g7, 64, %g7
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 66 bne,pt %xcc, 1b
105 add %o0, 256, %o0 !! 67 add %o0, 32, %o0
106 wr %g3, 0x0, %asi <<
107 membar #Sync 68 membar #Sync
108 retl 69 retl
109 nop 70 nop
110 71
111 #define BRANCH_ALWAYS 0x10680000 72 #define BRANCH_ALWAYS 0x10680000
112 #define NOP 0x01000000 73 #define NOP 0x01000000
113 #define NG_DO_PATCH(OLD, NEW) \ 74 #define NG_DO_PATCH(OLD, NEW) \
114 sethi %hi(NEW), %g1; \ 75 sethi %hi(NEW), %g1; \
115 or %g1, %lo(NEW), %g1; \ 76 or %g1, %lo(NEW), %g1; \
116 sethi %hi(OLD), %g2; \ 77 sethi %hi(OLD), %g2; \
117 or %g2, %lo(OLD), %g2; \ 78 or %g2, %lo(OLD), %g2; \
118 sub %g1, %g2, %g1; \ 79 sub %g1, %g2, %g1; \
119 sethi %hi(BRANCH_ALWAYS), %g3; \ 80 sethi %hi(BRANCH_ALWAYS), %g3; \
120 sll %g1, 11, %g1; \ 81 sll %g1, 11, %g1; \
121 srl %g1, 11 + 2, %g1; \ 82 srl %g1, 11 + 2, %g1; \
122 or %g3, %lo(BRANCH_ALWAYS), %g3; 83 or %g3, %lo(BRANCH_ALWAYS), %g3; \
123 or %g3, %g1, %g3; \ 84 or %g3, %g1, %g3; \
124 stw %g3, [%g2]; \ 85 stw %g3, [%g2]; \
125 sethi %hi(NOP), %g3; \ 86 sethi %hi(NOP), %g3; \
126 or %g3, %lo(NOP), %g3; \ 87 or %g3, %lo(NOP), %g3; \
127 stw %g3, [%g2 + 0x4]; \ 88 stw %g3, [%g2 + 0x4]; \
128 flush %g2; 89 flush %g2;
129 90
130 .globl niagara_patch_pageops 91 .globl niagara_patch_pageops
131 .type niagara_patch_pageops,#functio 92 .type niagara_patch_pageops,#function
132 niagara_patch_pageops: 93 niagara_patch_pageops:
133 NG_DO_PATCH(copy_user_page, NGcopy_use 94 NG_DO_PATCH(copy_user_page, NGcopy_user_page)
134 NG_DO_PATCH(_clear_page, NGclear_page) 95 NG_DO_PATCH(_clear_page, NGclear_page)
135 NG_DO_PATCH(clear_user_page, NGclear_u 96 NG_DO_PATCH(clear_user_page, NGclear_user_page)
136 retl 97 retl
137 nop 98 nop
138 .size niagara_patch_pageops,.-niagar 99 .size niagara_patch_pageops,.-niagara_patch_pageops
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