| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* $Id: swift.S,v 1.9 2002/01/08 11:11:59 davem Exp $ |
| 2 | * swift.S: MicroSparc-II mmu/cache operations. |
| 3 | * |
| 4 | * Copyright (C) 1999 David S. Miller (davem@redhat.com) |
| 5 | */ |
| 6 | |
| 7 | #include <linux/config.h> |
| 8 | #include <asm/psr.h> |
| 9 | #include <asm/asi.h> |
| 10 | #include <asm/page.h> |
| 11 | #include <asm/pgtsrmmu.h> |
| 12 | #include <asm/asm_offsets.h> |
| 13 | |
| 14 | .text |
| 15 | .align 4 |
| 16 | |
| 17 | #if 1 /* XXX screw this, I can't get the VAC flushes working |
| 18 | * XXX reliably... -DaveM |
| 19 | */ |
| 20 | .globl swift_flush_cache_all, swift_flush_cache_mm |
| 21 | .globl swift_flush_cache_range, swift_flush_cache_page |
| 22 | .globl swift_flush_page_for_dma |
| 23 | .globl swift_flush_page_to_ram |
| 24 | |
| 25 | swift_flush_cache_all: |
| 26 | swift_flush_cache_mm: |
| 27 | swift_flush_cache_range: |
| 28 | swift_flush_cache_page: |
| 29 | swift_flush_page_for_dma: |
| 30 | swift_flush_page_to_ram: |
| 31 | sethi %hi(0x2000), %o0 |
| 32 | 1: subcc %o0, 0x10, %o0 |
| 33 | add %o0, %o0, %o1 |
| 34 | sta %g0, [%o0] ASI_M_DATAC_TAG |
| 35 | bne 1b |
| 36 | sta %g0, [%o1] ASI_M_TXTC_TAG |
| 37 | retl |
| 38 | nop |
| 39 | #else |
| 40 | |
| 41 | .globl swift_flush_cache_all |
| 42 | swift_flush_cache_all: |
| 43 | WINDOW_FLUSH(%g4, %g5) |
| 44 | |
| 45 | /* Just clear out all the tags. */ |
| 46 | sethi %hi(16 * 1024), %o0 |
| 47 | 1: subcc %o0, 16, %o0 |
| 48 | sta %g0, [%o0] ASI_M_TXTC_TAG |
| 49 | bne 1b |
| 50 | sta %g0, [%o0] ASI_M_DATAC_TAG |
| 51 | retl |
| 52 | nop |
| 53 | |
| 54 | .globl swift_flush_cache_mm |
| 55 | swift_flush_cache_mm: |
| 56 | ld [%o0 + AOFF_mm_context], %g2 |
| 57 | cmp %g2, -1 |
| 58 | be swift_flush_cache_mm_out |
| 59 | WINDOW_FLUSH(%g4, %g5) |
| 60 | rd %psr, %g1 |
| 61 | andn %g1, PSR_ET, %g3 |
| 62 | wr %g3, 0x0, %psr |
| 63 | nop |
| 64 | nop |
| 65 | mov SRMMU_CTX_REG, %g7 |
| 66 | lda [%g7] ASI_M_MMUREGS, %g5 |
| 67 | sta %g2, [%g7] ASI_M_MMUREGS |
| 68 | |
| 69 | #if 1 |
| 70 | sethi %hi(0x2000), %o0 |
| 71 | 1: subcc %o0, 0x10, %o0 |
| 72 | sta %g0, [%o0] ASI_M_FLUSH_CTX |
| 73 | bne 1b |
| 74 | nop |
| 75 | #else |
| 76 | clr %o0 |
| 77 | or %g0, 2048, %g7 |
| 78 | or %g0, 2048, %o1 |
| 79 | add %o1, 2048, %o2 |
| 80 | add %o2, 2048, %o3 |
| 81 | mov 16, %o4 |
| 82 | add %o4, 2048, %o5 |
| 83 | add %o5, 2048, %g2 |
| 84 | add %g2, 2048, %g3 |
| 85 | 1: sta %g0, [%o0 ] ASI_M_FLUSH_CTX |
| 86 | sta %g0, [%o0 + %o1] ASI_M_FLUSH_CTX |
| 87 | sta %g0, [%o0 + %o2] ASI_M_FLUSH_CTX |
| 88 | sta %g0, [%o0 + %o3] ASI_M_FLUSH_CTX |
| 89 | sta %g0, [%o0 + %o4] ASI_M_FLUSH_CTX |
| 90 | sta %g0, [%o0 + %o5] ASI_M_FLUSH_CTX |
| 91 | sta %g0, [%o0 + %g2] ASI_M_FLUSH_CTX |
| 92 | sta %g0, [%o0 + %g3] ASI_M_FLUSH_CTX |
| 93 | subcc %g7, 32, %g7 |
| 94 | bne 1b |
| 95 | add %o0, 32, %o0 |
| 96 | #endif |
| 97 | |
| 98 | mov SRMMU_CTX_REG, %g7 |
| 99 | sta %g5, [%g7] ASI_M_MMUREGS |
| 100 | wr %g1, 0x0, %psr |
| 101 | nop |
| 102 | nop |
| 103 | swift_flush_cache_mm_out: |
| 104 | retl |
| 105 | nop |
| 106 | |
| 107 | .globl swift_flush_cache_range |
| 108 | swift_flush_cache_range: |
| 109 | ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */ |
| 110 | sub %o2, %o1, %o2 |
| 111 | sethi %hi(4096), %o3 |
| 112 | cmp %o2, %o3 |
| 113 | bgu swift_flush_cache_mm |
| 114 | nop |
| 115 | b 70f |
| 116 | nop |
| 117 | |
| 118 | .globl swift_flush_cache_page |
| 119 | swift_flush_cache_page: |
| 120 | ld [%o0 + 0x0], %o0 /* XXX vma->vm_mm, GROSS XXX */ |
| 121 | 70: |
| 122 | ld [%o0 + AOFF_mm_context], %g2 |
| 123 | cmp %g2, -1 |
| 124 | be swift_flush_cache_page_out |
| 125 | WINDOW_FLUSH(%g4, %g5) |
| 126 | rd %psr, %g1 |
| 127 | andn %g1, PSR_ET, %g3 |
| 128 | wr %g3, 0x0, %psr |
| 129 | nop |
| 130 | nop |
| 131 | mov SRMMU_CTX_REG, %g7 |
| 132 | lda [%g7] ASI_M_MMUREGS, %g5 |
| 133 | sta %g2, [%g7] ASI_M_MMUREGS |
| 134 | |
| 135 | andn %o1, (PAGE_SIZE - 1), %o1 |
| 136 | #if 1 |
| 137 | sethi %hi(0x1000), %o0 |
| 138 | 1: subcc %o0, 0x10, %o0 |
| 139 | sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE |
| 140 | bne 1b |
| 141 | nop |
| 142 | #else |
| 143 | or %g0, 512, %g7 |
| 144 | or %g0, 512, %o0 |
| 145 | add %o0, 512, %o2 |
| 146 | add %o2, 512, %o3 |
| 147 | add %o3, 512, %o4 |
| 148 | add %o4, 512, %o5 |
| 149 | add %o5, 512, %g3 |
| 150 | add %g3, 512, %g4 |
| 151 | 1: sta %g0, [%o1 ] ASI_M_FLUSH_PAGE |
| 152 | sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE |
| 153 | sta %g0, [%o1 + %o2] ASI_M_FLUSH_PAGE |
| 154 | sta %g0, [%o1 + %o3] ASI_M_FLUSH_PAGE |
| 155 | sta %g0, [%o1 + %o4] ASI_M_FLUSH_PAGE |
| 156 | sta %g0, [%o1 + %o5] ASI_M_FLUSH_PAGE |
| 157 | sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE |
| 158 | sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE |
| 159 | subcc %g7, 16, %g7 |
| 160 | bne 1b |
| 161 | add %o1, 16, %o1 |
| 162 | #endif |
| 163 | |
| 164 | mov SRMMU_CTX_REG, %g7 |
| 165 | sta %g5, [%g7] ASI_M_MMUREGS |
| 166 | wr %g1, 0x0, %psr |
| 167 | nop |
| 168 | nop |
| 169 | swift_flush_cache_page_out: |
| 170 | retl |
| 171 | nop |
| 172 | |
| 173 | /* Swift is write-thru, however it is not |
| 174 | * I/O nor TLB-walk coherent. Also it has |
| 175 | * caches which are virtually indexed and tagged. |
| 176 | */ |
| 177 | .globl swift_flush_page_for_dma |
| 178 | .globl swift_flush_page_to_ram |
| 179 | swift_flush_page_for_dma: |
| 180 | swift_flush_page_to_ram: |
| 181 | andn %o0, (PAGE_SIZE - 1), %o1 |
| 182 | #if 1 |
| 183 | sethi %hi(0x1000), %o0 |
| 184 | 1: subcc %o0, 0x10, %o0 |
| 185 | sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE |
| 186 | bne 1b |
| 187 | nop |
| 188 | #else |
| 189 | or %g0, 512, %g7 |
| 190 | or %g0, 512, %o0 |
| 191 | add %o0, 512, %o2 |
| 192 | add %o2, 512, %o3 |
| 193 | add %o3, 512, %o4 |
| 194 | add %o4, 512, %o5 |
| 195 | add %o5, 512, %g3 |
| 196 | add %g3, 512, %g4 |
| 197 | 1: sta %g0, [%o1 ] ASI_M_FLUSH_PAGE |
| 198 | sta %g0, [%o1 + %o0] ASI_M_FLUSH_PAGE |
| 199 | sta %g0, [%o1 + %o2] ASI_M_FLUSH_PAGE |
| 200 | sta %g0, [%o1 + %o3] ASI_M_FLUSH_PAGE |
| 201 | sta %g0, [%o1 + %o4] ASI_M_FLUSH_PAGE |
| 202 | sta %g0, [%o1 + %o5] ASI_M_FLUSH_PAGE |
| 203 | sta %g0, [%o1 + %g3] ASI_M_FLUSH_PAGE |
| 204 | sta %g0, [%o1 + %g4] ASI_M_FLUSH_PAGE |
| 205 | subcc %g7, 16, %g7 |
| 206 | bne 1b |
| 207 | add %o1, 16, %o1 |
| 208 | #endif |
| 209 | retl |
| 210 | nop |
| 211 | #endif |
| 212 | |
| 213 | .globl swift_flush_sig_insns |
| 214 | swift_flush_sig_insns: |
| 215 | flush %o1 |
| 216 | retl |
| 217 | flush %o1 + 4 |
| 218 | |
| 219 | .globl swift_flush_tlb_mm |
| 220 | .globl swift_flush_tlb_range |
| 221 | .globl swift_flush_tlb_all |
| 222 | swift_flush_tlb_range: |
| 223 | ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */ |
| 224 | swift_flush_tlb_mm: |
| 225 | ld [%o0 + AOFF_mm_context], %g2 |
| 226 | cmp %g2, -1 |
| 227 | be swift_flush_tlb_all_out |
| 228 | swift_flush_tlb_all: |
| 229 | mov 0x400, %o1 |
| 230 | sta %g0, [%o1] ASI_M_FLUSH_PROBE |
| 231 | swift_flush_tlb_all_out: |
| 232 | retl |
| 233 | nop |
| 234 | |
| 235 | .globl swift_flush_tlb_page |
| 236 | swift_flush_tlb_page: |
| 237 | ld [%o0 + 0x00], %o0 /* XXX vma->vm_mm GROSS XXX */ |
| 238 | mov SRMMU_CTX_REG, %g1 |
| 239 | ld [%o0 + AOFF_mm_context], %o3 |
| 240 | andn %o1, (PAGE_SIZE - 1), %o1 |
| 241 | cmp %o3, -1 |
| 242 | be swift_flush_tlb_page_out |
| 243 | nop |
| 244 | #if 1 |
| 245 | mov 0x400, %o1 |
| 246 | sta %g0, [%o1] ASI_M_FLUSH_PROBE |
| 247 | #else |
| 248 | lda [%g1] ASI_M_MMUREGS, %g5 |
| 249 | sta %o3, [%g1] ASI_M_MMUREGS |
| 250 | sta %g0, [%o1] ASI_M_FLUSH_PAGE /* rem. virt. cache. prot. */ |
| 251 | sta %g0, [%o1] ASI_M_FLUSH_PROBE |
| 252 | sta %g5, [%g1] ASI_M_MMUREGS |
| 253 | #endif |
| 254 | swift_flush_tlb_page_out: |
| 255 | retl |
| 256 | nop |