Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/xtensa/mm/misc.S |
| 3 | * |
| 4 | * Miscellaneous assembly functions. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | * |
| 10 | * Copyright (C) 2001 - 2005 Tensilica Inc. |
| 11 | * |
| 12 | * Chris Zankel <chris@zankel.net> |
| 13 | */ |
| 14 | |
| 15 | /* Note: we might want to implement some of the loops as zero-overhead-loops, |
| 16 | * where applicable and if supported by the processor. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/linkage.h> |
| 20 | #include <asm/page.h> |
| 21 | #include <asm/pgtable.h> |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 22 | #include <asm/asmmacro.h> |
| 23 | #include <asm/cacheasm.h> |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 24 | |
| 25 | /* clear_page (page) */ |
| 26 | |
| 27 | ENTRY(clear_page) |
| 28 | entry a1, 16 |
| 29 | addi a4, a2, PAGE_SIZE |
| 30 | movi a3, 0 |
| 31 | |
| 32 | 1: s32i a3, a2, 0 |
| 33 | s32i a3, a2, 4 |
| 34 | s32i a3, a2, 8 |
| 35 | s32i a3, a2, 12 |
| 36 | s32i a3, a2, 16 |
| 37 | s32i a3, a2, 20 |
| 38 | s32i a3, a2, 24 |
| 39 | s32i a3, a2, 28 |
| 40 | addi a2, a2, 32 |
| 41 | blt a2, a4, 1b |
| 42 | |
| 43 | retw |
| 44 | |
| 45 | /* |
| 46 | * copy_page (void *to, void *from) |
| 47 | * a2 a3 |
| 48 | */ |
| 49 | |
| 50 | ENTRY(copy_page) |
| 51 | entry a1, 16 |
| 52 | addi a4, a2, PAGE_SIZE |
| 53 | |
| 54 | 1: l32i a5, a3, 0 |
| 55 | l32i a6, a3, 4 |
| 56 | l32i a7, a3, 8 |
| 57 | s32i a5, a2, 0 |
| 58 | s32i a6, a2, 4 |
| 59 | s32i a7, a2, 8 |
| 60 | l32i a5, a3, 12 |
| 61 | l32i a6, a3, 16 |
| 62 | l32i a7, a3, 20 |
| 63 | s32i a5, a2, 12 |
| 64 | s32i a6, a2, 16 |
| 65 | s32i a7, a2, 20 |
| 66 | l32i a5, a3, 24 |
| 67 | l32i a6, a3, 28 |
| 68 | s32i a5, a2, 24 |
| 69 | s32i a6, a2, 28 |
| 70 | addi a2, a2, 32 |
| 71 | addi a3, a3, 32 |
| 72 | blt a2, a4, 1b |
| 73 | |
| 74 | retw |
| 75 | |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 76 | /* |
| 77 | * void __invalidate_icache_page(ulong start) |
| 78 | */ |
| 79 | |
| 80 | ENTRY(__invalidate_icache_page) |
| 81 | entry sp, 16 |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 82 | |
| 83 | ___invalidate_icache_page a2 a3 |
| 84 | isync |
| 85 | |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 86 | retw |
| 87 | |
| 88 | /* |
| 89 | * void __invalidate_dcache_page(ulong start) |
| 90 | */ |
| 91 | |
| 92 | ENTRY(__invalidate_dcache_page) |
| 93 | entry sp, 16 |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 94 | |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 95 | ___invalidate_dcache_page a2 a3 |
| 96 | dsync |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 97 | |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 98 | retw |
| 99 | |
| 100 | /* |
| 101 | * void __flush_invalidate_dcache_page(ulong start) |
| 102 | */ |
| 103 | |
| 104 | ENTRY(__flush_invalidate_dcache_page) |
| 105 | entry sp, 16 |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 106 | |
| 107 | ___flush_invalidate_dcache_page a2 a3 |
| 108 | |
| 109 | dsync |
| 110 | retw |
| 111 | |
| 112 | /* |
| 113 | * void __flush_dcache_page(ulong start) |
| 114 | */ |
| 115 | |
| 116 | ENTRY(__flush_dcache_page) |
| 117 | entry sp, 16 |
| 118 | |
| 119 | ___flush_dcache_page a2 a3 |
| 120 | |
| 121 | dsync |
| 122 | retw |
| 123 | |
| 124 | |
| 125 | |
| 126 | /* |
| 127 | * void __invalidate_icache_range(ulong start, ulong size) |
| 128 | */ |
| 129 | |
| 130 | ENTRY(__invalidate_icache_range) |
| 131 | entry sp, 16 |
| 132 | |
| 133 | ___invalidate_icache_range a2 a3 a4 |
| 134 | isync |
| 135 | |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 136 | retw |
| 137 | |
| 138 | /* |
| 139 | * void __flush_invalidate_dcache_range(ulong start, ulong size) |
| 140 | */ |
| 141 | |
| 142 | ENTRY(__flush_invalidate_dcache_range) |
| 143 | entry sp, 16 |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 144 | |
| 145 | ___flush_invalidate_dcache_range a2 a3 a4 |
| 146 | dsync |
| 147 | |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 148 | retw |
| 149 | |
| 150 | /* |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 151 | * void _flush_dcache_range(ulong start, ulong size) |
| 152 | */ |
| 153 | |
| 154 | ENTRY(__flush_dcache_range) |
| 155 | entry sp, 16 |
| 156 | |
| 157 | ___flush_dcache_range a2 a3 a4 |
| 158 | dsync |
| 159 | |
| 160 | retw |
| 161 | |
| 162 | /* |
| 163 | * void _invalidate_dcache_range(ulong start, ulong size) |
| 164 | */ |
| 165 | |
| 166 | ENTRY(__invalidate_dcache_range) |
| 167 | entry sp, 16 |
| 168 | |
| 169 | ___invalidate_dcache_range a2 a3 a4 |
| 170 | |
| 171 | |
| 172 | retw |
| 173 | |
| 174 | /* |
| 175 | * void _invalidate_icache_all(void) |
| 176 | */ |
| 177 | |
| 178 | ENTRY(__invalidate_icache_all) |
| 179 | entry sp, 16 |
| 180 | |
| 181 | ___invalidate_icache_all a2 a3 |
| 182 | isync |
| 183 | |
| 184 | retw |
| 185 | |
| 186 | /* |
| 187 | * void _flush_invalidate_dcache_all(void) |
| 188 | */ |
| 189 | |
| 190 | ENTRY(__flush_invalidate_dcache_all) |
| 191 | entry sp, 16 |
| 192 | |
| 193 | ___flush_invalidate_dcache_all a2 a3 |
| 194 | dsync |
| 195 | |
| 196 | retw |
| 197 | |
| 198 | /* |
| 199 | * void _invalidate_dcache_all(void) |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 200 | */ |
| 201 | |
| 202 | ENTRY(__invalidate_dcache_all) |
| 203 | entry sp, 16 |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 204 | |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 205 | ___invalidate_dcache_all a2 a3 |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 206 | dsync |
Chris Zankel | 3f65ce4 | 2005-06-23 22:01:24 -0700 | [diff] [blame] | 207 | |
| 208 | retw |
| 209 | |