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 */ 256