1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Inline assembly cache operations. 7 * 8 * Copyright (C) 1996 David S. Miller (davem@davemloft.net) 9 * Copyright (C) 1997 - 2002 Ralf Baechle (ralf@gnu.org) 10 * Copyright (C) 2004 Ralf Baechle (ralf@linux-mips.org) 11 */ 12 #ifndef _ASM_R4KCACHE_H 13 #define _ASM_R4KCACHE_H 14 15 #include <linux/stringify.h> 16 17 #include <asm/asm.h> 18 #include <asm/asm-eva.h> 19 #include <asm/cacheops.h> 20 #include <asm/compiler.h> 21 #include <asm/cpu-features.h> 22 #include <asm/cpu-type.h> 23 #include <asm/mipsmtregs.h> 24 #include <asm/mmzone.h> 25 #include <asm/unroll.h> 26 27 extern void r5k_sc_init(void); 28 extern void rm7k_sc_init(void); 29 extern int mips_sc_init(void); 30 31 extern void (*r4k_blast_dcache)(void); 32 extern void (*r4k_blast_icache)(void); 33 34 /* 35 * This macro return a properly sign-extended address suitable as base address 36 * for indexed cache operations. Two issues here: 37 * 38 * - The MIPS32 and MIPS64 specs permit an implementation to directly derive 39 * the index bits from the virtual address. This breaks with tradition 40 * set by the R4000. To keep unpleasant surprises from happening we pick 41 * an address in KSEG0 / CKSEG0. 42 * - We need a properly sign extended address for 64-bit code. To get away 43 * without ifdefs we let the compiler do it by a type cast. 44 */ 45 #define INDEX_BASE CKSEG0 46 47 #define _cache_op(insn, op, addr) \ 48 __asm__ __volatile__( \ 49 " .set push \n" \ 50 " .set noreorder \n" \ 51 " .set "MIPS_ISA_ARCH_LEVEL" \n" \ 52 " " insn("%0", "%1") " \n" \ 53 " .set pop \n" \ 54 : \ 55 : "i" (op), "R" (*(unsigned char *)(addr))) 56 57 #define cache_op(op, addr) \ 58 _cache_op(kernel_cache, op, addr) 59 60 static inline void flush_icache_line_indexed(unsigned long addr) 61 { 62 cache_op(Index_Invalidate_I, addr); 63 } 64 65 static inline void flush_dcache_line_indexed(unsigned long addr) 66 { 67 cache_op(Index_Writeback_Inv_D, addr); 68 } 69 70 static inline void flush_scache_line_indexed(unsigned long addr) 71 { 72 cache_op(Index_Writeback_Inv_SD, addr); 73 } 74 75 static inline void flush_icache_line(unsigned long addr) 76 { 77 switch (boot_cpu_type()) { 78 case CPU_LOONGSON2EF: 79 cache_op(Hit_Invalidate_I_Loongson2, addr); 80 break; 81 82 default: 83 cache_op(Hit_Invalidate_I, addr); 84 break; 85 } 86 } 87 88 static inline void flush_dcache_line(unsigned long addr) 89 { 90 cache_op(Hit_Writeback_Inv_D, addr); 91 } 92 93 static inline void invalidate_dcache_line(unsigned long addr) 94 { 95 cache_op(Hit_Invalidate_D, addr); 96 } 97 98 static inline void invalidate_scache_line(unsigned long addr) 99 { 100 cache_op(Hit_Invalidate_SD, addr); 101 } 102 103 static inline void flush_scache_line(unsigned long addr) 104 { 105 cache_op(Hit_Writeback_Inv_SD, addr); 106 } 107 108 #ifdef CONFIG_EVA 109 110 #define protected_cache_op(op, addr) \ 111 ({ \ 112 int __err = 0; \ 113 __asm__ __volatile__( \ 114 " .set push \n" \ 115 " .set noreorder \n" \ 116 " .set mips0 \n" \ 117 " .set eva \n" \ 118 "1: cachee %1, (%2) \n" \ 119 "2: .insn \n" \ 120 " .set pop \n" \ 121 " .section .fixup,\"ax\" \n" \ 122 "3: li %0, %3 \n" \ 123 " j 2b \n" \ 124 " .previous \n" \ 125 " .section __ex_table,\"a\" \n" \ 126 " "STR(PTR_WD)" 1b, 3b \n" \ 127 " .previous" \ 128 : "+r" (__err) \ 129 : "i" (op), "r" (addr), "i" (-EFAULT)); \ 130 __err; \ 131 }) 132 #else 133 134 #define protected_cache_op(op, addr) \ 135 ({ \ 136 int __err = 0; \ 137 __asm__ __volatile__( \ 138 " .set push \n" \ 139 " .set noreorder \n" \ 140 " .set "MIPS_ISA_ARCH_LEVEL" \n" \ 141 "1: cache %1, (%2) \n" \ 142 "2: .insn \n" \ 143 " .set pop \n" \ 144 " .section .fixup,\"ax\" \n" \ 145 "3: li %0, %3 \n" \ 146 " j 2b \n" \ 147 " .previous \n" \ 148 " .section __ex_table,\"a\" \n" \ 149 " "STR(PTR_WD)" 1b, 3b \n" \ 150 " .previous" \ 151 : "+r" (__err) \ 152 : "i" (op), "r" (addr), "i" (-EFAULT)); \ 153 __err; \ 154 }) 155 #endif 156 157 /* 158 * The next two are for badland addresses like signal trampolines. 159 */ 160 static inline int protected_flush_icache_line(unsigned long addr) 161 { 162 switch (boot_cpu_type()) { 163 case CPU_LOONGSON2EF: 164 return protected_cache_op(Hit_Invalidate_I_Loongson2, addr); 165 166 default: 167 return protected_cache_op(Hit_Invalidate_I, addr); 168 } 169 } 170 171 /* 172 * R10000 / R12000 hazard - these processors don't support the Hit_Writeback_D 173 * cacheop so we use Hit_Writeback_Inv_D which is supported by all R4000-style 174 * caches. We're talking about one cacheline unnecessarily getting invalidated 175 * here so the penalty isn't overly hard. 176 */ 177 static inline int protected_writeback_dcache_line(unsigned long addr) 178 { 179 return protected_cache_op(Hit_Writeback_Inv_D, addr); 180 } 181 182 static inline int protected_writeback_scache_line(unsigned long addr) 183 { 184 return protected_cache_op(Hit_Writeback_Inv_SD, addr); 185 } 186 187 /* 188 * This one is RM7000-specific 189 */ 190 static inline void invalidate_tcache_page(unsigned long addr) 191 { 192 cache_op(Page_Invalidate_T, addr); 193 } 194 195 #define cache_unroll(times, insn, op, addr, lsize) do { \ 196 int i = 0; \ 197 unroll(times, _cache_op, insn, op, (addr) + (i++ * (lsize))); \ 198 } while (0) 199 200 /* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */ 201 #define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, extra) \ 202 static inline void extra##blast_##pfx##cache##lsize(void) \ 203 { \ 204 unsigned long start = INDEX_BASE; \ 205 unsigned long end = start + current_cpu_data.desc.waysize; \ 206 unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \ 207 unsigned long ws_end = current_cpu_data.desc.ways << \ 208 current_cpu_data.desc.waybit; \ 209 unsigned long ws, addr; \ 210 \ 211 for (ws = 0; ws < ws_end; ws += ws_inc) \ 212 for (addr = start; addr < end; addr += lsize * 32) \ 213 cache_unroll(32, kernel_cache, indexop, \ 214 addr | ws, lsize); \ 215 } \ 216 \ 217 static inline void extra##blast_##pfx##cache##lsize##_page(unsigned long page) \ 218 { \ 219 unsigned long start = page; \ 220 unsigned long end = page + PAGE_SIZE; \ 221 \ 222 do { \ 223 cache_unroll(32, kernel_cache, hitop, start, lsize); \ 224 start += lsize * 32; \ 225 } while (start < end); \ 226 } \ 227 \ 228 static inline void extra##blast_##pfx##cache##lsize##_page_indexed(unsigned long page) \ 229 { \ 230 unsigned long indexmask = current_cpu_data.desc.waysize - 1; \ 231 unsigned long start = INDEX_BASE + (page & indexmask); \ 232 unsigned long end = start + PAGE_SIZE; \ 233 unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \ 234 unsigned long ws_end = current_cpu_data.desc.ways << \ 235 current_cpu_data.desc.waybit; \ 236 unsigned long ws, addr; \ 237 \ 238 for (ws = 0; ws < ws_end; ws += ws_inc) \ 239 for (addr = start; addr < end; addr += lsize * 32) \ 240 cache_unroll(32, kernel_cache, indexop, \ 241 addr | ws, lsize); \ 242 } 243 244 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, ) 245 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16, ) 246 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16, ) 247 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32, ) 248 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32, ) 249 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I_Loongson2, 32, loongson2_) 250 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, ) 251 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64, ) 252 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, ) 253 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, ) 254 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 128, ) 255 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 128, ) 256 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, ) 257 258 __BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, ) 259 __BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, ) 260 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, ) 261 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, ) 262 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, ) 263 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, ) 264 265 #define __BUILD_BLAST_USER_CACHE(pfx, desc, indexop, hitop, lsize) \ 266 static inline void blast_##pfx##cache##lsize##_user_page(unsigned long page) \ 267 { \ 268 unsigned long start = page; \ 269 unsigned long end = page + PAGE_SIZE; \ 270 \ 271 do { \ 272 cache_unroll(32, user_cache, hitop, start, lsize); \ 273 start += lsize * 32; \ 274 } while (start < end); \ 275 } 276 277 __BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 278 16) 279 __BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16) 280 __BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 281 32) 282 __BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32) 283 __BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 284 64) 285 __BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64) 286 287 /* build blast_xxx_range, protected_blast_xxx_range */ 288 #define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, extra) \ 289 static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start, \ 290 unsigned long end) \ 291 { \ 292 unsigned long lsize = cpu_##desc##_line_size(); \ 293 unsigned long addr = start & ~(lsize - 1); \ 294 unsigned long aend = (end - 1) & ~(lsize - 1); \ 295 \ 296 while (1) { \ 297 prot##cache_op(hitop, addr); \ 298 if (addr == aend) \ 299 break; \ 300 addr += lsize; \ 301 } \ 302 } 303 304 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, ) 305 __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_, ) 306 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_, ) 307 __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I_Loongson2, \ 308 protected_, loongson2_) 309 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, , ) 310 __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, , ) 311 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, , ) 312 /* blast_inv_dcache_range */ 313 __BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, , ) 314 __BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, , ) 315 316 /* Currently, this is very specific to Loongson-3 */ 317 #define __BUILD_BLAST_CACHE_NODE(pfx, desc, indexop, hitop, lsize) \ 318 static inline void blast_##pfx##cache##lsize##_node(long node) \ 319 { \ 320 unsigned long start = CAC_BASE | nid_to_addrbase(node); \ 321 unsigned long end = start + current_cpu_data.desc.waysize; \ 322 unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \ 323 unsigned long ws_end = current_cpu_data.desc.ways << \ 324 current_cpu_data.desc.waybit; \ 325 unsigned long ws, addr; \ 326 \ 327 for (ws = 0; ws < ws_end; ws += ws_inc) \ 328 for (addr = start; addr < end; addr += lsize * 32) \ 329 cache_unroll(32, kernel_cache, indexop, \ 330 addr | ws, lsize); \ 331 } 332 333 __BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16) 334 __BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32) 335 __BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64) 336 __BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128) 337 338 #endif /* _ASM_R4KCACHE_H */ 339