arch/mips/include/asm/r4kcache.h

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