include/asm-mips/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 (dm@engr.sgi.com)
   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 <asm/asm.h>
  16 #include <asm/cacheops.h>
  17 #include <asm/cpu-features.h>
  18
  19 /*
  20  * This macro return a properly sign-extended address suitable as base address
  21  * for indexed cache operations.  Two issues here:
  22  *
  23  *  - The MIPS32 and MIPS64 specs permit an implementation to directly derive
  24  *    the index bits from the virtual address.  This breaks with tradition
  25  *    set by the R4000.  To keep unpleasant surprises from happening we pick
  26  *    an address in KSEG0 / CKSEG0.
  27  *  - We need a properly sign extended address for 64-bit code.  To get away
  28  *    without ifdefs we let the compiler do it by a type cast.
  29  */
  30 #define INDEX_BASE      CKSEG0
  31
  32 #define cache_op(op,addr)                                               \
  33         __asm__ __volatile__(                                           \
  34         "       .set    push                                    \n"     \
  35         "       .set    noreorder                               \n"     \
  36         "       .set    mips3\n\t                               \n"     \
  37         "       cache   %0, %1                                  \n"     \
  38         "       .set    pop                                     \n"     \
  39         :                                                               \
  40         : "i" (op), "m" (*(unsigned char *)(addr)))
  41
  42 static inline void flush_icache_line_indexed(unsigned long addr)
  43 {
  44         cache_op(Index_Invalidate_I, addr);
  45 }
  46
  47 static inline void flush_dcache_line_indexed(unsigned long addr)
  48 {
  49         cache_op(Index_Writeback_Inv_D, addr);
  50 }
  51
  52 static inline void flush_scache_line_indexed(unsigned long addr)
  53 {
  54         cache_op(Index_Writeback_Inv_SD, addr);
  55 }
  56
  57 static inline void flush_icache_line(unsigned long addr)
  58 {
  59         cache_op(Hit_Invalidate_I, addr);
  60 }
  61
  62 static inline void flush_dcache_line(unsigned long addr)
  63 {
  64         cache_op(Hit_Writeback_Inv_D, addr);
  65 }
  66
  67 static inline void invalidate_dcache_line(unsigned long addr)
  68 {
  69         cache_op(Hit_Invalidate_D, addr);
  70 }
  71
  72 static inline void invalidate_scache_line(unsigned long addr)
  73 {
  74         cache_op(Hit_Invalidate_SD, addr);
  75 }
  76
  77 static inline void flush_scache_line(unsigned long addr)
  78 {
  79         cache_op(Hit_Writeback_Inv_SD, addr);
  80 }
  81
  82 #define protected_cache_op(op,addr)                             \
  83         __asm__ __volatile__(                                   \
  84         "       .set    push                    \n"             \
  85         "       .set    noreorder               \n"             \
  86         "       .set    mips3                   \n"             \
  87         "1:     cache   %0, (%1)                \n"             \
  88         "2:     .set    pop                     \n"             \
  89         "       .section __ex_table,\"a\"       \n"             \
  90         "       "STR(PTR)" 1b, 2b               \n"             \
  91         "       .previous"                                      \
  92         :                                                       \
  93         : "i" (op), "r" (addr))
  94
  95 /*
  96  * The next two are for badland addresses like signal trampolines.
  97  */
  98 static inline void protected_flush_icache_line(unsigned long addr)
  99 {
 100         protected_cache_op(Hit_Invalidate_I, addr);
 101 }
 102
 103 /*
 104  * R10000 / R12000 hazard - these processors don't support the Hit_Writeback_D
 105  * cacheop so we use Hit_Writeback_Inv_D which is supported by all R4000-style
 106  * caches.  We're talking about one cacheline unnecessarily getting invalidated
 107  * here so the penalty isn't overly hard.
 108  */
 109 static inline void protected_writeback_dcache_line(unsigned long addr)
 110 {
 111         protected_cache_op(Hit_Writeback_Inv_D, addr);
 112 }
 113
 114 static inline void protected_writeback_scache_line(unsigned long addr)
 115 {
 116         protected_cache_op(Hit_Writeback_Inv_SD, addr);
 117 }
 118
 119 /*
 120  * This one is RM7000-specific
 121  */
 122 static inline void invalidate_tcache_page(unsigned long addr)
 123 {
 124         cache_op(Page_Invalidate_T, addr);
 125 }
 126
 127 #define cache16_unroll32(base,op)                                       \
 128         __asm__ __volatile__(                                           \
 129         "       .set push                                       \n"     \
 130         "       .set noreorder                                  \n"     \
 131         "       .set mips3                                      \n"     \
 132         "       cache %1, 0x000(%0); cache %1, 0x010(%0)        \n"     \
 133         "       cache %1, 0x020(%0); cache %1, 0x030(%0)        \n"     \
 134         "       cache %1, 0x040(%0); cache %1, 0x050(%0)        \n"     \
 135         "       cache %1, 0x060(%0); cache %1, 0x070(%0)        \n"     \
 136         "       cache %1, 0x080(%0); cache %1, 0x090(%0)        \n"     \
 137         "       cache %1, 0x0a0(%0); cache %1, 0x0b0(%0)        \n"     \
 138         "       cache %1, 0x0c0(%0); cache %1, 0x0d0(%0)        \n"     \
 139         "       cache %1, 0x0e0(%0); cache %1, 0x0f0(%0)        \n"     \
 140         "       cache %1, 0x100(%0); cache %1, 0x110(%0)        \n"     \
 141         "       cache %1, 0x120(%0); cache %1, 0x130(%0)        \n"     \
 142         "       cache %1, 0x140(%0); cache %1, 0x150(%0)        \n"     \
 143         "       cache %1, 0x160(%0); cache %1, 0x170(%0)        \n"     \
 144         "       cache %1, 0x180(%0); cache %1, 0x190(%0)        \n"     \
 145         "       cache %1, 0x1a0(%0); cache %1, 0x1b0(%0)        \n"     \
 146         "       cache %1, 0x1c0(%0); cache %1, 0x1d0(%0)        \n"     \
 147         "       cache %1, 0x1e0(%0); cache %1, 0x1f0(%0)        \n"     \
 148         "       .set pop                                        \n"     \
 149                 :                                                       \
 150                 : "r" (base),                                           \
 151                   "i" (op));
 152
 153 #define cache32_unroll32(base,op)                                       \
 154         __asm__ __volatile__(                                           \
 155         "       .set push                                       \n"     \
 156         "       .set noreorder                                  \n"     \
 157         "       .set mips3                                      \n"     \
 158         "       cache %1, 0x000(%0); cache %1, 0x020(%0)        \n"     \
 159         "       cache %1, 0x040(%0); cache %1, 0x060(%0)        \n"     \
 160         "       cache %1, 0x080(%0); cache %1, 0x0a0(%0)        \n"     \
 161         "       cache %1, 0x0c0(%0); cache %1, 0x0e0(%0)        \n"     \
 162         "       cache %1, 0x100(%0); cache %1, 0x120(%0)        \n"     \
 163         "       cache %1, 0x140(%0); cache %1, 0x160(%0)        \n"     \
 164         "       cache %1, 0x180(%0); cache %1, 0x1a0(%0)        \n"     \
 165         "       cache %1, 0x1c0(%0); cache %1, 0x1e0(%0)        \n"     \
 166         "       cache %1, 0x200(%0); cache %1, 0x220(%0)        \n"     \
 167         "       cache %1, 0x240(%0); cache %1, 0x260(%0)        \n"     \
 168         "       cache %1, 0x280(%0); cache %1, 0x2a0(%0)        \n"     \
 169         "       cache %1, 0x2c0(%0); cache %1, 0x2e0(%0)        \n"     \
 170         "       cache %1, 0x300(%0); cache %1, 0x320(%0)        \n"     \
 171         "       cache %1, 0x340(%0); cache %1, 0x360(%0)        \n"     \
 172         "       cache %1, 0x380(%0); cache %1, 0x3a0(%0)        \n"     \
 173         "       cache %1, 0x3c0(%0); cache %1, 0x3e0(%0)        \n"     \
 174         "       .set pop                                        \n"     \
 175                 :                                                       \
 176                 : "r" (base),                                           \
 177                   "i" (op));
 178
 179 #define cache64_unroll32(base,op)                                       \
 180         __asm__ __volatile__(                                           \
 181         "       .set push                                       \n"     \
 182         "       .set noreorder                                  \n"     \
 183         "       .set mips3                                      \n"     \
 184         "       cache %1, 0x000(%0); cache %1, 0x040(%0)        \n"     \
 185         "       cache %1, 0x080(%0); cache %1, 0x0c0(%0)        \n"     \
 186         "       cache %1, 0x100(%0); cache %1, 0x140(%0)        \n"     \
 187         "       cache %1, 0x180(%0); cache %1, 0x1c0(%0)        \n"     \
 188         "       cache %1, 0x200(%0); cache %1, 0x240(%0)        \n"     \
 189         "       cache %1, 0x280(%0); cache %1, 0x2c0(%0)        \n"     \
 190         "       cache %1, 0x300(%0); cache %1, 0x340(%0)        \n"     \
 191         "       cache %1, 0x380(%0); cache %1, 0x3c0(%0)        \n"     \
 192         "       cache %1, 0x400(%0); cache %1, 0x440(%0)        \n"     \
 193         "       cache %1, 0x480(%0); cache %1, 0x4c0(%0)        \n"     \
 194         "       cache %1, 0x500(%0); cache %1, 0x540(%0)        \n"     \
 195         "       cache %1, 0x580(%0); cache %1, 0x5c0(%0)        \n"     \
 196         "       cache %1, 0x600(%0); cache %1, 0x640(%0)        \n"     \
 197         "       cache %1, 0x680(%0); cache %1, 0x6c0(%0)        \n"     \
 198         "       cache %1, 0x700(%0); cache %1, 0x740(%0)        \n"     \
 199         "       cache %1, 0x780(%0); cache %1, 0x7c0(%0)        \n"     \
 200         "       .set pop                                        \n"     \
 201                 :                                                       \
 202                 : "r" (base),                                           \
 203                   "i" (op));
 204
 205 #define cache128_unroll32(base,op)                                      \
 206         __asm__ __volatile__(                                           \
 207         "       .set push                                       \n"     \
 208         "       .set noreorder                                  \n"     \
 209         "       .set mips3                                      \n"     \
 210         "       cache %1, 0x000(%0); cache %1, 0x080(%0)        \n"     \
 211         "       cache %1, 0x100(%0); cache %1, 0x180(%0)        \n"     \
 212         "       cache %1, 0x200(%0); cache %1, 0x280(%0)        \n"     \
 213         "       cache %1, 0x300(%0); cache %1, 0x380(%0)        \n"     \
 214         "       cache %1, 0x400(%0); cache %1, 0x480(%0)        \n"     \
 215         "       cache %1, 0x500(%0); cache %1, 0x580(%0)        \n"     \
 216         "       cache %1, 0x600(%0); cache %1, 0x680(%0)        \n"     \
 217         "       cache %1, 0x700(%0); cache %1, 0x780(%0)        \n"     \
 218         "       cache %1, 0x800(%0); cache %1, 0x880(%0)        \n"     \
 219         "       cache %1, 0x900(%0); cache %1, 0x980(%0)        \n"     \
 220         "       cache %1, 0xa00(%0); cache %1, 0xa80(%0)        \n"     \
 221         "       cache %1, 0xb00(%0); cache %1, 0xb80(%0)        \n"     \
 222         "       cache %1, 0xc00(%0); cache %1, 0xc80(%0)        \n"     \
 223         "       cache %1, 0xd00(%0); cache %1, 0xd80(%0)        \n"     \
 224         "       cache %1, 0xe00(%0); cache %1, 0xe80(%0)        \n"     \
 225         "       cache %1, 0xf00(%0); cache %1, 0xf80(%0)        \n"     \
 226         "       .set pop                                        \n"     \
 227                 :                                                       \
 228                 : "r" (base),                                           \
 229                   "i" (op));
 230
 231 /* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
 232 #define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
 233 static inline void blast_##pfx##cache##lsize(void)                      \
 234 {                                                                       \
 235         unsigned long start = INDEX_BASE;                               \
 236         unsigned long end = start + current_cpu_data.desc.waysize;      \
 237         unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit;     \
 238         unsigned long ws_end = current_cpu_data.desc.ways <<            \
 239                                current_cpu_data.desc.waybit;            \
 240         unsigned long ws, addr;                                         \
 241                                                                         \
 242         for (ws = 0; ws < ws_end; ws += ws_inc)                         \
 243                 for (addr = start; addr < end; addr += lsize * 32)      \
 244                         cache##lsize##_unroll32(addr|ws,indexop);       \
 245 }                                                                       \
 246                                                                         \
 247 static inline void blast_##pfx##cache##lsize##_page(unsigned long page) \
 248 {                                                                       \
 249         unsigned long start = page;                                     \
 250         unsigned long end = page + PAGE_SIZE;                           \
 251                                                                         \
 252         do {                                                            \
 253                 cache##lsize##_unroll32(start,hitop);                   \
 254                 start += lsize * 32;                                    \
 255         } while (start < end);                                          \
 256 }                                                                       \
 257                                                                         \
 258 static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page) \
 259 {                                                                       \
 260         unsigned long indexmask = current_cpu_data.desc.waysize - 1;    \
 261         unsigned long start = INDEX_BASE + (page & indexmask);          \
 262         unsigned long end = start + PAGE_SIZE;                          \
 263         unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit;     \
 264         unsigned long ws_end = current_cpu_data.desc.ways <<            \
 265                                current_cpu_data.desc.waybit;            \
 266         unsigned long ws, addr;                                         \
 267                                                                         \
 268         for (ws = 0; ws < ws_end; ws += ws_inc)                         \
 269                 for (addr = start; addr < end; addr += lsize * 32)      \
 270                         cache##lsize##_unroll32(addr|ws,indexop);       \
 271 }
 272
 273 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
 274 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
 275 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
 276 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
 277 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
 278 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
 279 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
 280 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
 281 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
 282
 283 /* build blast_xxx_range, protected_blast_xxx_range */
 284 #define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
 285 static inline void prot##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         while (1) {                                                     \
 292                 prot##cache_op(hitop, addr);                            \
 293                 if (addr == aend)                                       \
 294                         break;                                          \
 295                 addr += lsize;                                          \
 296         }                                                               \
 297 }
 298
 299 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
 300 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
 301 __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
 302 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
 303 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
 304 /* blast_inv_dcache_range */
 305 __BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
 306 __BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
 307
 308 #endif /* _ASM_R4KCACHE_H */