projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8591e302 DM |
1 | /* NGpage.S: Niagara optimize clear and copy page. |
| 2 | * | |
| 3 | * Copyright (C) 2006 ([email protected]) | |
| 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 */ | |
| e95ade08 DM |
19 | save %sp, -192, %sp |
| 20 | rd %asi, %g3 | |
| 21 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi | |
| 8591e302 | 22 | set PAGE_SIZE, %g7 |
| e95ade08 DM |
23 | prefetch [%i1 + 0x00], #one_read |
| 24 | prefetch [%i1 + 0x40], #one_read | |
| 8591e302 | 25 | |
| e95ade08 DM |
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 | |
| 8591e302 | 54 | bne,pt %xcc, 1b |
| e95ade08 DM |
55 | add %i0, 128, %i0 |
| 56 | wr %g3, 0x0, %asi | |
| 24d559ca | 57 | membar #Sync |
| e95ade08 DM |
58 | ret |
| 59 | restore | |
| 8591e302 | 60 | |
| e95ade08 | 61 | .align 32 |
| ae2c6ca6 DM |
62 | .globl NGclear_page |
| 63 | .globl NGclear_user_page | |
| 8591e302 DM |
64 | NGclear_page: /* %o0=dest */ |
| 65 | NGclear_user_page: /* %o0=dest, %o1=vaddr */ | |
| e95ade08 DM |
66 | rd %asi, %g3 |
| 67 | wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi | |
| 8591e302 DM |
68 | set PAGE_SIZE, %g7 |
| 69 | ||
| e95ade08 DM |
70 | 1: stxa %g0, [%o0 + 0x00] %asi |
| 71 | stxa %g0, [%o0 + 0x08] %asi | |
| 72 | stxa %g0, [%o0 + 0x10] %asi | |
| 73 | stxa %g0, [%o0 + 0x18] %asi | |
| 74 | stxa %g0, [%o0 + 0x20] %asi | |
| 75 | stxa %g0, [%o0 + 0x28] %asi | |
| 76 | stxa %g0, [%o0 + 0x30] %asi | |
| 77 | stxa %g0, [%o0 + 0x38] %asi | |
| 78 | stxa %g0, [%o0 + 0x40] %asi | |
| 79 | stxa %g0, [%o0 + 0x48] %asi | |
| 80 | stxa %g0, [%o0 + 0x50] %asi | |
| 81 | stxa %g0, [%o0 + 0x58] %asi | |
| 82 | stxa %g0, [%o0 + 0x60] %asi | |
| 83 | stxa %g0, [%o0 + 0x68] %asi | |
| 84 | stxa %g0, [%o0 + 0x70] %asi | |
| 85 | stxa %g0, [%o0 + 0x78] %asi | |
| 86 | stxa %g0, [%o0 + 0x80] %asi | |
| 87 | stxa %g0, [%o0 + 0x88] %asi | |
| 88 | stxa %g0, [%o0 + 0x90] %asi | |
| 89 | stxa %g0, [%o0 + 0x98] %asi | |
| 90 | stxa %g0, [%o0 + 0xa0] %asi | |
| 91 | stxa %g0, [%o0 + 0xa8] %asi | |
| 92 | stxa %g0, [%o0 + 0xb0] %asi | |
| 93 | stxa %g0, [%o0 + 0xb8] %asi | |
| 94 | stxa %g0, [%o0 + 0xc0] %asi | |
| 95 | stxa %g0, [%o0 + 0xc8] %asi | |
| 96 | stxa %g0, [%o0 + 0xd0] %asi | |
| 97 | stxa %g0, [%o0 + 0xd8] %asi | |
| 98 | stxa %g0, [%o0 + 0xe0] %asi | |
| 99 | stxa %g0, [%o0 + 0xe8] %asi | |
| 100 | stxa %g0, [%o0 + 0xf0] %asi | |
| 101 | stxa %g0, [%o0 + 0xf8] %asi | |
| 102 | subcc %g7, 256, %g7 | |
| 8591e302 | 103 | bne,pt %xcc, 1b |
| e95ade08 DM |
104 | add %o0, 256, %o0 |
| 105 | wr %g3, 0x0, %asi | |
| 24d559ca | 106 | membar #Sync |
| 8591e302 DM |
107 | retl |
| 108 | nop | |
| 109 | ||
| 110 | #define BRANCH_ALWAYS 0x10680000 | |
| 111 | #define NOP 0x01000000 | |
| 112 | #define NG_DO_PATCH(OLD, NEW) \ | |
| 113 | sethi %hi(NEW), %g1; \ | |
| 114 | or %g1, %lo(NEW), %g1; \ | |
| 115 | sethi %hi(OLD), %g2; \ | |
| 116 | or %g2, %lo(OLD), %g2; \ | |
| 117 | sub %g1, %g2, %g1; \ | |
| 118 | sethi %hi(BRANCH_ALWAYS), %g3; \ | |
| 6241e5cc DM |
119 | sll %g1, 11, %g1; \ |
| 120 | srl %g1, 11 + 2, %g1; \ | |
| 8591e302 DM |
121 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
| 122 | or %g3, %g1, %g3; \ | |
| 123 | stw %g3, [%g2]; \ | |
| 124 | sethi %hi(NOP), %g3; \ | |
| 125 | or %g3, %lo(NOP), %g3; \ | |
| 126 | stw %g3, [%g2 + 0x4]; \ | |
| 127 | flush %g2; | |
| 128 | ||
| 129 | .globl niagara_patch_pageops | |
| 130 | .type niagara_patch_pageops,#function | |
| 131 | niagara_patch_pageops: | |
| 132 | NG_DO_PATCH(copy_user_page, NGcopy_user_page) | |
| 133 | NG_DO_PATCH(_clear_page, NGclear_page) | |
| 134 | NG_DO_PATCH(clear_user_page, NGclear_user_page) | |
| 135 | retl | |
| 136 | nop | |
| 137 | .size niagara_patch_pageops,.-niagara_patch_pageops |