target/linux/brcm47xx/patches-2.6.25/150-cpu_fixes.patch

   1 --- a/arch/mips/kernel/genex.S
   2 +++ b/arch/mips/kernel/genex.S
   3 @@ -51,6 +51,10 @@ NESTED(except_vec1_generic, 0, sp)
   4  NESTED(except_vec3_generic, 0, sp)
   5         .set    push
   6         .set    noat
   7 +#ifdef CONFIG_BCM47XX
   8 +       nop
   9 +       nop
  10 +#endif
  11  #if R5432_CP0_INTERRUPT_WAR
  12         mfc0    k0, CP0_INDEX
  13  #endif
  14 --- a/arch/mips/mm/c-r4k.c
  15 +++ b/arch/mips/mm/c-r4k.c
  16 @@ -33,6 +33,9 @@
  17  #include <asm/cacheflush.h> /* for run_uncached() */
  18
  19
  20 +/* For enabling BCM4710 cache workarounds */
  21 +int bcm4710 = 0;
  22 +
  23  /*
  24   * Special Variant of smp_call_function for use by cache functions:
  25   *
  26 @@ -97,6 +100,9 @@ static void __cpuinit r4k_blast_dcache_p
  27  {
  28         unsigned long  dc_lsize = cpu_dcache_line_size();
  29
  30 +       if (bcm4710)
  31 +               r4k_blast_dcache_page = blast_dcache_page;
  32 +       else
  33         if (dc_lsize == 0)
  34                 r4k_blast_dcache_page = (void *)cache_noop;
  35         else if (dc_lsize == 16)
  36 @@ -111,6 +117,9 @@ static void __cpuinit r4k_blast_dcache_p
  37  {
  38         unsigned long dc_lsize = cpu_dcache_line_size();
  39
  40 +       if (bcm4710)
  41 +               r4k_blast_dcache_page_indexed = blast_dcache_page_indexed;
  42 +       else
  43         if (dc_lsize == 0)
  44                 r4k_blast_dcache_page_indexed = (void *)cache_noop;
  45         else if (dc_lsize == 16)
  46 @@ -125,6 +134,9 @@ static void __cpuinit r4k_blast_dcache_s
  47  {
  48         unsigned long dc_lsize = cpu_dcache_line_size();
  49
  50 +       if (bcm4710)
  51 +               r4k_blast_dcache = blast_dcache;
  52 +       else
  53         if (dc_lsize == 0)
  54                 r4k_blast_dcache = (void *)cache_noop;
  55         else if (dc_lsize == 16)
  56 @@ -630,6 +642,8 @@ static void local_r4k_flush_cache_sigtra
  57         unsigned long addr = (unsigned long) arg;
  58
  59         R4600_HIT_CACHEOP_WAR_IMPL;
  60 +       BCM4710_PROTECTED_FILL_TLB(addr);
  61 +       BCM4710_PROTECTED_FILL_TLB(addr + 4);
  62         if (dc_lsize)
  63                 protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
  64         if (!cpu_icache_snoops_remote_store && scache_size)
  65 @@ -1215,6 +1229,17 @@ static void __cpuinit coherency_setup(vo
  66          * silly idea of putting something else there ...
  67          */
  68         switch (current_cpu_type()) {
  69 +       case CPU_BCM3302:
  70 +               {
  71 +                       u32 cm;
  72 +                       cm = read_c0_diag();
  73 +                       /* Enable icache */
  74 +                       cm |= (1 << 31);
  75 +                       /* Enable dcache */
  76 +                       cm |= (1 << 30);
  77 +                       write_c0_diag(cm);
  78 +               }
  79 +               break;
  80         case CPU_R4000PC:
  81         case CPU_R4000SC:
  82         case CPU_R4000MC:
  83 @@ -1254,6 +1279,15 @@ void __cpuinit r4k_cache_init(void)
  84                 break;
  85         }
  86
  87 +       /* Check if special workarounds are required */
  88 +#ifdef CONFIG_BCM47XX
  89 +       if (current_cpu_data.cputype == CPU_BCM4710 && (current_cpu_data.processor_id & 0xff) == 0) {
  90 +               printk("Enabling BCM4710A0 cache workarounds.\n");
  91 +               bcm4710 = 1;
  92 +       } else
  93 +#endif
  94 +               bcm4710 = 0;
  95 +
  96         probe_pcache();
  97         setup_scache();
  98
  99 @@ -1303,5 +1337,13 @@ void __cpuinit r4k_cache_init(void)
 100         build_clear_page();
 101         build_copy_page();
 102         local_r4k___flush_cache_all(NULL);
 103 +#ifdef CONFIG_BCM47XX
 104 +       {
 105 +               static void (*_coherency_setup)(void);
 106 +               _coherency_setup = (void (*)(void)) KSEG1ADDR(coherency_setup);
 107 +               _coherency_setup();
 108 +       }
 109 +#else
 110         coherency_setup();
 111 +#endif
 112  }
 113 --- a/arch/mips/mm/tlbex.c
 114 +++ b/arch/mips/mm/tlbex.c
 115 @@ -677,6 +677,9 @@ static void __cpuinit build_r4000_tlb_re
 116                 /* No need for uasm_i_nop */
 117         }
 118
 119 +#ifdef CONFIG_BCM47XX
 120 +       uasm_i_nop(&p);
 121 +#endif
 122  #ifdef CONFIG_64BIT
 123         build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */
 124  #else
 125 @@ -1084,6 +1087,9 @@ build_r4000_tlbchange_handler_head(u32 *
 126                                    struct uasm_reloc **r, unsigned int pte,
 127                                    unsigned int ptr)
 128  {
 129 +#ifdef CONFIG_BCM47XX
 130 +       uasm_i_nop(p);
 131 +#endif
 132  #ifdef CONFIG_64BIT
 133         build_get_pmde64(p, l, r, pte, ptr); /* get pmd in ptr */
 134  #else
 135 --- a/include/asm-mips/r4kcache.h
 136 +++ b/include/asm-mips/r4kcache.h
 137 @@ -17,6 +17,20 @@
 138  #include <asm/cpu-features.h>
 139  #include <asm/mipsmtregs.h>
 140
 141 +#ifdef CONFIG_BCM47XX
 142 +#include <asm/paccess.h>
 143 +#include <linux/ssb/ssb.h>
 144 +#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE + SSB_IMSTATE)))
 145 +
 146 +#define BCM4710_FILL_TLB(addr) (*(volatile unsigned long *)(addr))
 147 +#define BCM4710_PROTECTED_FILL_TLB(addr) ({ unsigned long x; get_dbe(x, (volatile unsigned long *)(addr)); })
 148 +#else
 149 +#define BCM4710_DUMMY_RREG()
 150 +
 151 +#define BCM4710_FILL_TLB(addr)
 152 +#define BCM4710_PROTECTED_FILL_TLB(addr)
 153 +#endif
 154 +
 155  /*
 156   * This macro return a properly sign-extended address suitable as base address
 157   * for indexed cache operations.  Two issues here:
 158 @@ -150,6 +164,7 @@ static inline void flush_icache_line_ind
 159  static inline void flush_dcache_line_indexed(unsigned long addr)
 160  {
 161         __dflush_prologue
 162 +       BCM4710_DUMMY_RREG();
 163         cache_op(Index_Writeback_Inv_D, addr);
 164         __dflush_epilogue
 165  }
 166 @@ -169,6 +184,7 @@ static inline void flush_icache_line(uns
 167  static inline void flush_dcache_line(unsigned long addr)
 168  {
 169         __dflush_prologue
 170 +       BCM4710_DUMMY_RREG();
 171         cache_op(Hit_Writeback_Inv_D, addr);
 172         __dflush_epilogue
 173  }
 174 @@ -176,6 +192,7 @@ static inline void flush_dcache_line(uns
 175  static inline void invalidate_dcache_line(unsigned long addr)
 176  {
 177         __dflush_prologue
 178 +       BCM4710_DUMMY_RREG();
 179         cache_op(Hit_Invalidate_D, addr);
 180         __dflush_epilogue
 181  }
 182 @@ -208,6 +225,7 @@ static inline void flush_scache_line(uns
 183   */
 184  static inline void protected_flush_icache_line(unsigned long addr)
 185  {
 186 +       BCM4710_DUMMY_RREG();
 187         protected_cache_op(Hit_Invalidate_I, addr);
 188  }
 189
 190 @@ -219,6 +237,7 @@ static inline void protected_flush_icach
 191   */
 192  static inline void protected_writeback_dcache_line(unsigned long addr)
 193  {
 194 +       BCM4710_DUMMY_RREG();
 195         protected_cache_op(Hit_Writeback_Inv_D, addr);
 196  }
 197
 198 @@ -339,8 +358,52 @@ static inline void invalidate_tcache_pag
 199                 : "r" (base),                                           \
 200                   "i" (op));
 201
 202 +static inline void blast_dcache(void)
 203 +{
 204 +       unsigned long start = KSEG0;
 205 +       unsigned long dcache_size = current_cpu_data.dcache.waysize * current_cpu_data.dcache.ways;
 206 +       unsigned long end = (start + dcache_size);
 207 +
 208 +       do {
 209 +               BCM4710_DUMMY_RREG();
 210 +               cache_op(Index_Writeback_Inv_D, start);
 211 +               start += current_cpu_data.dcache.linesz;
 212 +       } while(start < end);
 213 +}
 214 +
 215 +static inline void blast_dcache_page(unsigned long page)
 216 +{
 217 +       unsigned long start = page;
 218 +       unsigned long end = start + PAGE_SIZE;
 219 +
 220 +       BCM4710_FILL_TLB(start);
 221 +       do {
 222 +               BCM4710_DUMMY_RREG();
 223 +               cache_op(Hit_Writeback_Inv_D, start);
 224 +               start += current_cpu_data.dcache.linesz;
 225 +       } while(start < end);
 226 +}
 227 +
 228 +static inline void blast_dcache_page_indexed(unsigned long page)
 229 +{
 230 +       unsigned long start = page;
 231 +       unsigned long end = start + PAGE_SIZE;
 232 +       unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
 233 +       unsigned long ws_end = current_cpu_data.dcache.ways <<
 234 +                              current_cpu_data.dcache.waybit;
 235 +       unsigned long ws, addr;
 236 +       for (ws = 0; ws < ws_end; ws += ws_inc) {
 237 +               start = page + ws;
 238 +               for (addr = start; addr < end; addr += current_cpu_data.dcache.linesz) {
 239 +                       BCM4710_DUMMY_RREG();
 240 +                       cache_op(Index_Writeback_Inv_D, addr);
 241 +               }
 242 +       }
 243 +}
 244 +
 245 +
 246  /* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
 247 -#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
 248 +#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, war) \
 249  static inline void blast_##pfx##cache##lsize(void)                     \
 250  {                                                                      \
 251         unsigned long start = INDEX_BASE;                               \
 252 @@ -352,6 +415,7 @@ static inline void blast_##pfx##cache##l
 253                                                                         \
 254         __##pfx##flush_prologue                                         \
 255                                                                         \
 256 +       war                                                             \
 257         for (ws = 0; ws < ws_end; ws += ws_inc)                         \
 258                 for (addr = start; addr < end; addr += lsize * 32)      \
 259                         cache##lsize##_unroll32(addr|ws, indexop);      \
 260 @@ -366,6 +430,7 @@ static inline void blast_##pfx##cache##l
 261                                                                         \
 262         __##pfx##flush_prologue                                         \
 263                                                                         \
 264 +       war                                                             \
 265         do {                                                            \
 266                 cache##lsize##_unroll32(start, hitop);                  \
 267                 start += lsize * 32;                                    \
 268 @@ -384,6 +449,8 @@ static inline void blast_##pfx##cache##l
 269                                current_cpu_data.desc.waybit;            \
 270         unsigned long ws, addr;                                         \
 271                                                                         \
 272 +       war                                                             \
 273 +                                                                       \
 274         __##pfx##flush_prologue                                         \
 275                                                                         \
 276         for (ws = 0; ws < ws_end; ws += ws_inc)                         \
 277 @@ -393,35 +460,37 @@ static inline void blast_##pfx##cache##l
 278         __##pfx##flush_epilogue                                         \
 279  }
 280
 281 -__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
 282 -__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
 283 -__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
 284 -__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
 285 -__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
 286 -__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
 287 -__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
 288 -__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
 289 -__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
 290 -
 291 -__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
 292 -__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
 293 -__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
 294 -__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
 295 -__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
 296 -__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128)
 297 +__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, )
 298 +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16, BCM4710_FILL_TLB(start);)
 299 +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16, )
 300 +__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32, )
 301 +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32, BCM4710_FILL_TLB(start);)
 302 +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, )
 303 +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, BCM4710_FILL_TLB(start);)
 304 +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, )
 305 +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, )
 306 +
 307 +__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
 308 +__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, )
 309 +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, )
 310 +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, )
 311 +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )
 312 +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, )
 313
 314  /* build blast_xxx_range, protected_blast_xxx_range */
 315 -#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
 316 +#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, war, war2) \
 317  static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
 318                                                     unsigned long end)  \
 319  {                                                                      \
 320         unsigned long lsize = cpu_##desc##_line_size();                 \
 321         unsigned long addr = start & ~(lsize - 1);                      \
 322         unsigned long aend = (end - 1) & ~(lsize - 1);                  \
 323 +       war                                                             \
 324                                                                         \
 325         __##pfx##flush_prologue                                         \
 326                                                                         \
 327         while (1) {                                                     \
 328 +               war2                                            \
 329                 prot##cache_op(hitop, addr);                            \
 330                 if (addr == aend)                                       \
 331                         break;                                          \
 332 @@ -431,13 +500,13 @@ static inline void prot##blast_##pfx##ca
 333         __##pfx##flush_epilogue                                         \
 334  }
 335
 336 -__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
 337 -__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
 338 -__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
 339 -__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
 340 -__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
 341 +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, BCM4710_PROTECTED_FILL_TLB(addr); BCM4710_PROTECTED_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
 342 +__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_,, )
 343 +__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_,, )
 344 +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D,, BCM4710_FILL_TLB(addr); BCM4710_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
 345 +__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD,,, )
 346  /* blast_inv_dcache_range */
 347 -__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
 348 -__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
 349 +__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D,,,BCM4710_DUMMY_RREG();)
 350 +__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD,,, )
 351
 352  #endif /* _ASM_R4KCACHE_H */
 353 --- a/include/asm-mips/stackframe.h
 354 +++ b/include/asm-mips/stackframe.h
 355 @@ -359,6 +359,10 @@
 356                 .macro  RESTORE_SP_AND_RET
 357                 LONG_L  sp, PT_R29(sp)
 358                 .set    mips3
 359 +#ifdef CONFIG_BCM47XX
 360 +               nop
 361 +               nop
 362 +#endif
 363                 eret
 364                 .set    mips0
 365                 .endm