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 kernel_uses_smartmips_rixi
  99 #define kernel_uses_smartmips_rixi 0
 100 #endif
 101 #ifndef cpu_has_vtag_icache
 102 #define cpu_has_vtag_icache     (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
 103 #endif
 104 #ifndef cpu_has_dc_aliases
 105 #define cpu_has_dc_aliases      (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
 106 #endif
 107 #ifndef cpu_has_ic_fills_f_dc
 108 #define cpu_has_ic_fills_f_dc   (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
 109 #endif
 110 #ifndef cpu_has_pindexed_dcache
 111 #define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
 112 #endif
 113
 114 /*
 115  * I-Cache snoops remote store.  This only matters on SMP.  Some multiprocessors
 116  * such as the R10000 have I-Caches that snoop local stores; the embedded ones
 117  * don't.  For maintaining I-cache coherency this means we need to flush the
 118  * D-cache all the way back to whever the I-cache does refills from, so the
 119  * I-cache has a chance to see the new data at all.  Then we have to flush the
 120  * I-cache also.
 121  * Note we may have been rescheduled and may no longer be running on the CPU
 122  * that did the store so we can't optimize this into only doing the flush on
 123  * the local CPU.
 124  */
 125 #ifndef cpu_icache_snoops_remote_store
 126 #ifdef CONFIG_SMP
 127 #define cpu_icache_snoops_remote_store  (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
 128 #else
 129 #define cpu_icache_snoops_remote_store  1
 130 #endif
 131 #endif
 132
 133 # ifndef cpu_has_mips32r1
 134 # define cpu_has_mips32r1       (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R1)
 135 # endif
 136 # ifndef cpu_has_mips32r2
 137 # define cpu_has_mips32r2       (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R2)
 138 # endif
 139 # ifndef cpu_has_mips64r1
 140 # define cpu_has_mips64r1       (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R1)
 141 # endif
 142 # ifndef cpu_has_mips64r2
 143 # define cpu_has_mips64r2       (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R2)
 144 # endif
 145
 146 /*
 147  * Shortcuts ...
 148  */
 149 #define cpu_has_mips32  (cpu_has_mips32r1 | cpu_has_mips32r2)
 150 #define cpu_has_mips64  (cpu_has_mips64r1 | cpu_has_mips64r2)
 151 #define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
 152 #define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
 153 #define cpu_has_mips_r  (cpu_has_mips32r1 | cpu_has_mips32r2 | \
 154                          cpu_has_mips64r1 | cpu_has_mips64r2)
 155
 156 #ifndef cpu_has_mips_r2_exec_hazard
 157 #define cpu_has_mips_r2_exec_hazard cpu_has_mips_r2
 158 #endif
 159
 160 /*
 161  * MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
 162  * pre-MIPS32/MIPS53 processors have CLO, CLZ.  The IDT RC64574 is 64-bit and
 163  * has CLO and CLZ but not DCLO nor DCLZ.  For 64-bit kernels
 164  * cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
 165  */
 166 # ifndef cpu_has_clo_clz
 167 # define cpu_has_clo_clz        cpu_has_mips_r
 168 # endif
 169
 170 #ifndef cpu_has_dsp
 171 #define cpu_has_dsp             (cpu_data[0].ases & MIPS_ASE_DSP)
 172 #endif
 173
 174 #ifndef cpu_has_mipsmt
 175 #define cpu_has_mipsmt          (cpu_data[0].ases & MIPS_ASE_MIPSMT)
 176 #endif
 177
 178 #ifndef cpu_has_userlocal
 179 #define cpu_has_userlocal       (cpu_data[0].options & MIPS_CPU_ULRI)
 180 #endif
 181
 182 #ifdef CONFIG_32BIT
 183 # ifndef cpu_has_nofpuex
 184 # define cpu_has_nofpuex        (cpu_data[0].options & MIPS_CPU_NOFPUEX)
 185 # endif
 186 # ifndef cpu_has_64bits
 187 # define cpu_has_64bits         (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
 188 # endif
 189 # ifndef cpu_has_64bit_zero_reg
 190 # define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
 191 # endif
 192 # ifndef cpu_has_64bit_gp_regs
 193 # define cpu_has_64bit_gp_regs          0
 194 # endif
 195 # ifndef cpu_has_64bit_addresses
 196 # define cpu_has_64bit_addresses        0
 197 # endif
 198 # ifndef cpu_vmbits
 199 # define cpu_vmbits 31
 200 # endif
 201 #endif
 202
 203 #ifdef CONFIG_64BIT
 204 # ifndef cpu_has_nofpuex
 205 # define cpu_has_nofpuex                0
 206 # endif
 207 # ifndef cpu_has_64bits
 208 # define cpu_has_64bits                 1
 209 # endif
 210 # ifndef cpu_has_64bit_zero_reg
 211 # define cpu_has_64bit_zero_reg         1
 212 # endif
 213 # ifndef cpu_has_64bit_gp_regs
 214 # define cpu_has_64bit_gp_regs          1
 215 # endif
 216 # ifndef cpu_has_64bit_addresses
 217 # define cpu_has_64bit_addresses        1
 218 # endif
 219 # ifndef cpu_vmbits
 220 # define cpu_vmbits cpu_data[0].vmbits
 221 # define __NEED_VMBITS_PROBE
 222 # endif
 223 #endif
 224
 225 #if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
 226 # define cpu_has_vint           (cpu_data[0].options & MIPS_CPU_VINT)
 227 #elif !defined(cpu_has_vint)
 228 # define cpu_has_vint                   0
 229 #endif
 230
 231 #if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
 232 # define cpu_has_veic           (cpu_data[0].options & MIPS_CPU_VEIC)
 233 #elif !defined(cpu_has_veic)
 234 # define cpu_has_veic                   0
 235 #endif
 236
 237 #ifndef cpu_has_inclusive_pcaches
 238 #define cpu_has_inclusive_pcaches       (cpu_data[0].options & MIPS_CPU_INCLUSIVE_CACHES)
 239 #endif
 240
 241 #ifndef cpu_dcache_line_size
 242 #define cpu_dcache_line_size()  cpu_data[0].dcache.linesz
 243 #endif
 244 #ifndef cpu_icache_line_size
 245 #define cpu_icache_line_size()  cpu_data[0].icache.linesz
 246 #endif
 247 #ifndef cpu_scache_line_size
 248 #define cpu_scache_line_size()  cpu_data[0].scache.linesz
 249 #endif
 250
 251 #ifndef cpu_hwrena_impl_bits
 252 #define cpu_hwrena_impl_bits            0
 253 #endif
 254
 255 #endif /* __ASM_CPU_FEATURES_H */