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 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 */