arch/mips/include/asm/cpu-features.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  * Copyright (C) 2003, 2004 Ralf Baechle
   7  * Copyright (C) 2004  Maciej W. Rozycki
   8  */
   9 #ifndef __ASM_CPU_FEATURES_H
  10 #define __ASM_CPU_FEATURES_H
  11
  12 #include <asm/cpu.h>
  13 #include <asm/cpu-info.h>
  14 #include <cpu-feature-overrides.h>
  15
  16 #ifndef current_cpu_type
  17 #define current_cpu_type()      current_cpu_data.cputype
  18 #endif
  19
  20 /*
  21  * SMP assumption: Options of CPU 0 are a superset of all processors.
  22  * This is true for all known MIPS systems.
  23  */
  24 #ifndef cpu_has_tlb
  25 #define cpu_has_tlb             (cpu_data[0].options & MIPS_CPU_TLB)
  26 #endif
  27 #ifndef cpu_has_4kex
  28 #define cpu_has_4kex            (cpu_data[0].options & MIPS_CPU_4KEX)
  29 #endif
  30 #ifndef cpu_has_3k_cache
  31 #define cpu_has_3k_cache        (cpu_data[0].options & MIPS_CPU_3K_CACHE)
  32 #endif
  33 #define cpu_has_6k_cache        0
  34 #define cpu_has_8k_cache        0
  35 #ifndef cpu_has_4k_cache
  36 #define cpu_has_4k_cache        (cpu_data[0].options & MIPS_CPU_4K_CACHE)
  37 #endif
  38 #ifndef cpu_has_tx39_cache
  39 #define cpu_has_tx39_cache      (cpu_data[0].options & MIPS_CPU_TX39_CACHE)
  40 #endif
  41 #ifndef cpu_has_octeon_cache
  42 #define cpu_has_octeon_cache    0
  43 #endif
  44 #ifndef cpu_has_fpu
  45 #define cpu_has_fpu             (current_cpu_data.options & MIPS_CPU_FPU)
  46 #define raw_cpu_has_fpu         (raw_current_cpu_data.options & MIPS_CPU_FPU)
  47 #else
  48 #define raw_cpu_has_fpu         cpu_has_fpu
  49 #endif
  50 #ifndef cpu_has_32fpr
  51 #define cpu_has_32fpr           (cpu_data[0].options & MIPS_CPU_32FPR)
  52 #endif
  53 #ifndef cpu_has_counter
  54 #define cpu_has_counter         (cpu_data[0].options & MIPS_CPU_COUNTER)
  55 #endif
  56 #ifndef cpu_has_watch
  57 #define cpu_has_watch           (cpu_data[0].options & MIPS_CPU_WATCH)
  58 #endif
  59 #ifndef cpu_has_divec
  60 #define cpu_has_divec           (cpu_data[0].options & MIPS_CPU_DIVEC)
  61 #endif
  62 #ifndef cpu_has_vce
  63 #define cpu_has_vce             (cpu_data[0].options & MIPS_CPU_VCE)
  64 #endif
  65 #ifndef cpu_has_cache_cdex_p
  66 #define cpu_has_cache_cdex_p    (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_P)
  67 #endif
  68 #ifndef cpu_has_cache_cdex_s
  69 #define cpu_has_cache_cdex_s    (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_S)
  70 #endif
  71 #ifndef cpu_has_prefetch
  72 #define cpu_has_prefetch        (cpu_data[0].options & MIPS_CPU_PREFETCH)
  73 #endif
  74 #ifndef cpu_has_mcheck
  75 #define cpu_has_mcheck          (cpu_data[0].options & MIPS_CPU_MCHECK)
  76 #endif
  77 #ifndef cpu_has_ejtag
  78 #define cpu_has_ejtag           (cpu_data[0].options & MIPS_CPU_EJTAG)
  79 #endif
  80 #ifndef cpu_has_llsc
  81 #define cpu_has_llsc            (cpu_data[0].options & MIPS_CPU_LLSC)
  82 #endif
  83 #ifndef kernel_uses_llsc
  84 #define kernel_uses_llsc        cpu_has_llsc
  85 #endif
  86 #ifndef cpu_has_mips16
  87 #define cpu_has_mips16          (cpu_data[0].ases & MIPS_ASE_MIPS16)
  88 #endif
  89 #ifndef cpu_has_mdmx
  90 #define cpu_has_mdmx           (cpu_data[0].ases & MIPS_ASE_MDMX)
  91 #endif
  92 #ifndef cpu_has_mips3d
  93 #define cpu_has_mips3d         (cpu_data[0].ases & MIPS_ASE_MIPS3D)
  94 #endif
  95 #ifndef cpu_has_smartmips
  96 #define cpu_has_smartmips      (cpu_data[0].ases & MIPS_ASE_SMARTMIPS)
  97 #endif
  98 #ifndef cpu_has_vtag_icache
  99 #define cpu_has_vtag_icache     (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
 100 #endif
 101 #ifndef cpu_has_dc_aliases
 102 #define cpu_has_dc_aliases      (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
 103 #endif
 104 #ifndef cpu_has_ic_fills_f_dc
 105 #define cpu_has_ic_fills_f_dc   (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
 106 #endif
 107 #ifndef cpu_has_pindexed_dcache
 108 #define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
 109 #endif
 110
 111 /*
 112  * I-Cache snoops remote store.  This only matters on SMP.  Some multiprocessors
 113  * such as the R10000 have I-Caches that snoop local stores; the embedded ones
 114  * don't.  For maintaining I-cache coherency this means we need to flush the
 115  * D-cache all the way back to whever the I-cache does refills from, so the
 116  * I-cache has a chance to see the new data at all.  Then we have to flush the
 117  * I-cache also.
 118  * Note we may have been rescheduled and may no longer be running on the CPU
 119  * that did the store so we can't optimize this into only doing the flush on
 120  * the local CPU.
 121  */
 122 #ifndef cpu_icache_snoops_remote_store
 123 #ifdef CONFIG_SMP
 124 #define cpu_icache_snoops_remote_store  (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
 125 #else
 126 #define cpu_icache_snoops_remote_store  1
 127 #endif
 128 #endif
 129
 130 # ifndef cpu_has_mips32r1
 131 # define cpu_has_mips32r1       (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R1)
 132 # endif
 133 # ifndef cpu_has_mips32r2
 134 # define cpu_has_mips32r2       (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R2)
 135 # endif
 136 # ifndef cpu_has_mips64r1
 137 # define cpu_has_mips64r1       (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R1)
 138 # endif
 139 # ifndef cpu_has_mips64r2
 140 # define cpu_has_mips64r2       (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R2)
 141 # endif
 142
 143 /*
 144  * Shortcuts ...
 145  */
 146 #define cpu_has_mips32  (cpu_has_mips32r1 | cpu_has_mips32r2)
 147 #define cpu_has_mips64  (cpu_has_mips64r1 | cpu_has_mips64r2)
 148 #define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
 149 #define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
 150 #define cpu_has_mips_r  (cpu_has_mips32r1 | cpu_has_mips32r2 | \
 151                          cpu_has_mips64r1 | cpu_has_mips64r2)
 152
 153 #ifndef cpu_has_mips_r2_exec_hazard
 154 #define cpu_has_mips_r2_exec_hazard cpu_has_mips_r2
 155 #endif
 156
 157 /*
 158  * MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
 159  * pre-MIPS32/MIPS53 processors have CLO, CLZ.  For 64-bit kernels
 160  * cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
 161  */
 162 # ifndef cpu_has_clo_clz
 163 # define cpu_has_clo_clz        cpu_has_mips_r
 164 # endif
 165
 166 #ifndef cpu_has_dsp
 167 #define cpu_has_dsp             (cpu_data[0].ases & MIPS_ASE_DSP)
 168 #endif
 169
 170 #ifndef cpu_has_mipsmt
 171 #define cpu_has_mipsmt          (cpu_data[0].ases & MIPS_ASE_MIPSMT)
 172 #endif
 173
 174 #ifndef cpu_has_userlocal
 175 #define cpu_has_userlocal       (cpu_data[0].options & MIPS_CPU_ULRI)
 176 #endif
 177
 178 #ifdef CONFIG_32BIT
 179 # ifndef cpu_has_nofpuex
 180 # define cpu_has_nofpuex        (cpu_data[0].options & MIPS_CPU_NOFPUEX)
 181 # endif
 182 # ifndef cpu_has_64bits
 183 # define cpu_has_64bits         (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
 184 # endif
 185 # ifndef cpu_has_64bit_zero_reg
 186 # define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
 187 # endif
 188 # ifndef cpu_has_64bit_gp_regs
 189 # define cpu_has_64bit_gp_regs          0
 190 # endif
 191 # ifndef cpu_has_64bit_addresses
 192 # define cpu_has_64bit_addresses        0
 193 # endif
 194 #endif
 195
 196 #ifdef CONFIG_64BIT
 197 # ifndef cpu_has_nofpuex
 198 # define cpu_has_nofpuex                0
 199 # endif
 200 # ifndef cpu_has_64bits
 201 # define cpu_has_64bits                 1
 202 # endif
 203 # ifndef cpu_has_64bit_zero_reg
 204 # define cpu_has_64bit_zero_reg         1
 205 # endif
 206 # ifndef cpu_has_64bit_gp_regs
 207 # define cpu_has_64bit_gp_regs          1
 208 # endif
 209 # ifndef cpu_has_64bit_addresses
 210 # define cpu_has_64bit_addresses        1
 211 # endif
 212 #endif
 213
 214 #if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
 215 # define cpu_has_vint           (cpu_data[0].options & MIPS_CPU_VINT)
 216 #elif !defined(cpu_has_vint)
 217 # define cpu_has_vint                   0
 218 #endif
 219
 220 #if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
 221 # define cpu_has_veic           (cpu_data[0].options & MIPS_CPU_VEIC)
 222 #elif !defined(cpu_has_veic)
 223 # define cpu_has_veic                   0
 224 #endif
 225
 226 #ifndef cpu_has_inclusive_pcaches
 227 #define cpu_has_inclusive_pcaches       (cpu_data[0].options & MIPS_CPU_INCLUSIVE_CACHES)
 228 #endif
 229
 230 #ifndef cpu_dcache_line_size
 231 #define cpu_dcache_line_size()  cpu_data[0].dcache.linesz
 232 #endif
 233 #ifndef cpu_icache_line_size
 234 #define cpu_icache_line_size()  cpu_data[0].icache.linesz
 235 #endif
 236 #ifndef cpu_scache_line_size
 237 #define cpu_scache_line_size()  cpu_data[0].scache.linesz
 238 #endif
 239
 240 #ifndef cpu_hwrena_impl_bits
 241 #define cpu_hwrena_impl_bits            0
 242 #endif
 243
 244 #endif /* __ASM_CPU_FEATURES_H */