1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef __ASM_CPU_INFO_H 6 #define __ASM_CPU_INFO_H 7 8 #include <linux/cache.h> 9 #include <linux/types.h> 10 11 #include <asm/loongarch.h> 12 13 /* cache_desc->flags */ 14 enum { 15 CACHE_PRESENT = (1 << 0), 16 CACHE_PRIVATE = (1 << 1), /* core private cache */ 17 CACHE_INCLUSIVE = (1 << 2), /* include the inner level caches */ 18 }; 19 20 /* 21 * Descriptor for a cache 22 */ 23 struct cache_desc { 24 unsigned char type; 25 unsigned char level; 26 unsigned short sets; /* Number of lines per set */ 27 unsigned char ways; /* Number of ways */ 28 unsigned char linesz; /* Size of line in bytes */ 29 unsigned char flags; /* Flags describing cache properties */ 30 }; 31 32 #define CACHE_LEVEL_MAX 3 33 #define CACHE_LEAVES_MAX 6 34 35 struct cpuinfo_loongarch { 36 u64 asid_cache; 37 unsigned long asid_mask; 38 39 /* 40 * Capability and feature descriptor structure for LoongArch CPU 41 */ 42 unsigned long long options; 43 unsigned int processor_id; 44 unsigned int fpu_vers; 45 unsigned int fpu_csr0; 46 unsigned int fpu_mask; 47 unsigned int cputype; 48 int isa_level; 49 int tlbsize; 50 int tlbsizemtlb; 51 int tlbsizestlbsets; 52 int tlbsizestlbways; 53 int cache_leaves_present; /* number of cache_leaves[] elements */ 54 struct cache_desc cache_leaves[CACHE_LEAVES_MAX]; 55 int core; /* physical core number in package */ 56 int package;/* physical package number */ 57 int global_id; /* physical global thread number */ 58 int vabits; /* Virtual Address size in bits */ 59 int pabits; /* Physical Address size in bits */ 60 int timerbits; /* Width of arch timer in bits */ 61 unsigned int ksave_mask; /* Usable KSave mask. */ 62 unsigned int watch_dreg_count; /* Number data breakpoints */ 63 unsigned int watch_ireg_count; /* Number instruction breakpoints */ 64 unsigned int watch_reg_use_cnt; /* min(NUM_WATCH_REGS, watch_dreg_count + watch_ireg_count), Usable by ptrace */ 65 } __aligned(SMP_CACHE_BYTES); 66 67 extern struct cpuinfo_loongarch cpu_data[]; 68 #define boot_cpu_data cpu_data[0] 69 #define current_cpu_data cpu_data[smp_processor_id()] 70 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()] 71 72 extern void cpu_probe(void); 73 74 extern const char *__cpu_family[]; 75 extern const char *__cpu_full_name[]; 76 #define cpu_family_string() __cpu_family[raw_smp_processor_id()] 77 #define cpu_full_name_string() __cpu_full_name[raw_smp_processor_id()] 78 79 struct seq_file; 80 struct notifier_block; 81 82 extern int register_proc_cpuinfo_notifier(struct notifier_block *nb); 83 extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v); 84 85 #define proc_cpuinfo_notifier(fn, pri) \ 86 ({ \ 87 static struct notifier_block fn##_nb = { \ 88 .notifier_call = fn, \ 89 .priority = pri \ 90 }; \ 91 \ 92 register_proc_cpuinfo_notifier(&fn##_nb); \ 93 }) 94 95 struct proc_cpuinfo_notifier_args { 96 struct seq_file *m; 97 unsigned long n; 98 }; 99 100 static inline bool cpus_are_siblings(int cpua, int cpub) 101 { 102 struct cpuinfo_loongarch *infoa = &cpu_data[cpua]; 103 struct cpuinfo_loongarch *infob = &cpu_data[cpub]; 104 105 if (infoa->package != infob->package) 106 return false; 107 108 if (infoa->core != infob->core) 109 return false; 110 111 return true; 112 } 113 114 static inline unsigned long cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo) 115 { 116 return cpuinfo->asid_mask; 117 } 118 119 static inline void set_cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo, 120 unsigned long asid_mask) 121 { 122 cpuinfo->asid_mask = asid_mask; 123 } 124 125 #endif /* __ASM_CPU_INFO_H */ 126