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) 1994 Waldorf GMBH 7 * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle 8 * Copyright (C) 1996 Paul M. Antoine 9 * Copyright (C) 1999, 2000 Silicon Graphics, Inc. 10 * Copyright (C) 2004 Maciej W. Rozycki 11 */ 12#ifndef __ASM_CPU_INFO_H 13#define __ASM_CPU_INFO_H 14 15#include <linux/cache.h> 16#include <linux/types.h> 17 18#include <asm/mipsregs.h> 19 20/* 21 * Descriptor for a cache 22 */ 23struct cache_desc { 24 unsigned int waysize; /* Bytes per way */ 25 unsigned short sets; /* Number of lines per set */ 26 unsigned char ways; /* Number of ways */ 27 unsigned char linesz; /* Size of line in bytes */ 28 unsigned char waybit; /* Bits to select in a cache set */ 29 unsigned char flags; /* Flags describing cache properties */ 30}; 31 32struct guest_info { 33 unsigned long ases; 34 unsigned long ases_dyn; 35 unsigned long long options; 36 unsigned long long options_dyn; 37 int tlbsize; 38 u8 conf; 39 u8 kscratch_mask; 40}; 41 42/* 43 * Flag definitions 44 */ 45#define MIPS_CACHE_NOT_PRESENT 0x00000001 46#define MIPS_CACHE_VTAG 0x00000002 /* Virtually tagged cache */ 47#define MIPS_CACHE_ALIASES 0x00000004 /* Cache could have aliases */ 48#define MIPS_CACHE_IC_F_DC 0x00000008 /* Ic can refill from D-cache */ 49#define MIPS_IC_SNOOPS_REMOTE 0x00000010 /* Ic snoops remote stores */ 50#define MIPS_CACHE_PINDEX 0x00000020 /* Physically indexed cache */ 51 52struct cpuinfo_mips { 53 unsigned long asid_cache; 54#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE 55 unsigned long asid_mask; 56#endif 57 58 /* 59 * Capability and feature descriptor structure for MIPS CPU 60 */ 61 unsigned long ases; 62 unsigned long long options; 63 unsigned int udelay_val; 64 unsigned int processor_id; 65 unsigned int fpu_id; 66 unsigned int fpu_csr31; 67 unsigned int fpu_msk31; 68 unsigned int msa_id; 69 unsigned int cputype; 70 int isa_level; 71 int tlbsize; 72 int tlbsizevtlb; 73 int tlbsizeftlbsets; 74 int tlbsizeftlbways; 75 struct cache_desc icache; /* Primary I-cache */ 76 struct cache_desc dcache; /* Primary D or combined I/D cache */ 77 struct cache_desc vcache; /* Victim cache, between pcache and scache */ 78 struct cache_desc scache; /* Secondary cache */ 79 struct cache_desc tcache; /* Tertiary/split secondary cache */ 80 int srsets; /* Shadow register sets */ 81 int package;/* physical package number */ 82 unsigned int globalnumber; 83#ifdef CONFIG_64BIT 84 int vmbits; /* Virtual memory size in bits */ 85#endif 86 void *data; /* Additional data */ 87 unsigned int watch_reg_count; /* Number that exist */ 88 unsigned int watch_reg_use_cnt; /* Usable by ptrace */ 89#define NUM_WATCH_REGS 4 90 u16 watch_reg_masks[NUM_WATCH_REGS]; 91 unsigned int kscratch_mask; /* Usable KScratch mask. */ 92 /* 93 * Cache Coherency attribute for write-combine memory writes. 94 * (shifted by _CACHE_SHIFT) 95 */ 96 unsigned int writecombine; 97 /* 98 * Simple counter to prevent enabling HTW in nested 99 * htw_start/htw_stop calls 100 */ 101 unsigned int htw_seq; 102 103 /* VZ & Guest features */ 104 struct guest_info guest; 105 unsigned int gtoffset_mask; 106 unsigned int guestid_mask; 107 unsigned int guestid_cache; 108} __attribute__((aligned(SMP_CACHE_BYTES))); 109 110extern struct cpuinfo_mips cpu_data[]; 111#define current_cpu_data cpu_data[smp_processor_id()] 112#define raw_current_cpu_data cpu_data[raw_smp_processor_id()] 113#define boot_cpu_data cpu_data[0] 114 115extern void cpu_probe(void); 116extern void cpu_report(void); 117 118extern const char *__cpu_name[]; 119#define cpu_name_string() __cpu_name[raw_smp_processor_id()] 120 121struct seq_file; 122struct notifier_block; 123 124extern int register_proc_cpuinfo_notifier(struct notifier_block *nb); 125extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v); 126 127#define proc_cpuinfo_notifier(fn, pri) \ 128({ \ 129 static struct notifier_block fn##_nb = { \ 130 .notifier_call = fn, \ 131 .priority = pri \ 132 }; \ 133 \ 134 register_proc_cpuinfo_notifier(&fn##_nb); \ 135}) 136 137struct proc_cpuinfo_notifier_args { 138 struct seq_file *m; 139 unsigned long n; 140}; 141 142static inline unsigned int cpu_cluster(struct cpuinfo_mips *cpuinfo) 143{ 144 /* Optimisation for systems where multiple clusters aren't used */ 145 if (!IS_ENABLED(CONFIG_CPU_MIPSR6)) 146 return 0; 147 148 return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CLUSTER) >> 149 MIPS_GLOBALNUMBER_CLUSTER_SHF; 150} 151 152static inline unsigned int cpu_core(struct cpuinfo_mips *cpuinfo) 153{ 154 return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CORE) >> 155 MIPS_GLOBALNUMBER_CORE_SHF; 156} 157 158static inline unsigned int cpu_vpe_id(struct cpuinfo_mips *cpuinfo) 159{ 160 /* Optimisation for systems where VP(E)s aren't used */ 161 if (!IS_ENABLED(CONFIG_MIPS_MT_SMP) && !IS_ENABLED(CONFIG_CPU_MIPSR6)) 162 return 0; 163 164 return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_VP) >> 165 MIPS_GLOBALNUMBER_VP_SHF; 166} 167 168extern void cpu_set_cluster(struct cpuinfo_mips *cpuinfo, unsigned int cluster); 169extern void cpu_set_core(struct cpuinfo_mips *cpuinfo, unsigned int core); 170extern void cpu_set_vpe_id(struct cpuinfo_mips *cpuinfo, unsigned int vpe); 171 172static inline bool cpus_are_siblings(int cpua, int cpub) 173{ 174 struct cpuinfo_mips *infoa = &cpu_data[cpua]; 175 struct cpuinfo_mips *infob = &cpu_data[cpub]; 176 unsigned int gnuma, gnumb; 177 178 if (infoa->package != infob->package) 179 return false; 180 181 gnuma = infoa->globalnumber & ~MIPS_GLOBALNUMBER_VP; 182 gnumb = infob->globalnumber & ~MIPS_GLOBALNUMBER_VP; 183 if (gnuma != gnumb) 184 return false; 185 186 return true; 187} 188 189static inline unsigned long cpu_asid_inc(void) 190{ 191 return 1 << CONFIG_MIPS_ASID_SHIFT; 192} 193 194static inline unsigned long cpu_asid_mask(struct cpuinfo_mips *cpuinfo) 195{ 196#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE 197 return cpuinfo->asid_mask; 198#endif 199 return ((1 << CONFIG_MIPS_ASID_BITS) - 1) << CONFIG_MIPS_ASID_SHIFT; 200} 201 202static inline void set_cpu_asid_mask(struct cpuinfo_mips *cpuinfo, 203 unsigned long asid_mask) 204{ 205#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE 206 cpuinfo->asid_mask = asid_mask; 207#endif 208} 209 210#endif /* __ASM_CPU_INFO_H */ 211