1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #include <linux/delay.h> 6 #include <linux/kernel.h> 7 #include <linux/sched.h> 8 #include <linux/seq_file.h> 9 #include <asm/bootinfo.h> 10 #include <asm/cpu.h> 11 #include <asm/cpu-features.h> 12 #include <asm/idle.h> 13 #include <asm/processor.h> 14 #include <asm/time.h> 15 16 /* 17 * No lock; only written during early bootup by CPU 0. 18 */ 19 static RAW_NOTIFIER_HEAD(proc_cpuinfo_chain); 20 21 int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb) 22 { 23 return raw_notifier_chain_register(&proc_cpuinfo_chain, nb); 24 } 25 26 int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v) 27 { 28 return raw_notifier_call_chain(&proc_cpuinfo_chain, val, v); 29 } 30 31 static int show_cpuinfo(struct seq_file *m, void *v) 32 { 33 unsigned long n = (unsigned long) v - 1; 34 unsigned int version = cpu_data[n].processor_id & 0xff; 35 unsigned int fp_version = cpu_data[n].fpu_vers; 36 struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args; 37 38 #ifdef CONFIG_SMP 39 if (!cpu_online(n)) 40 return 0; 41 #endif 42 43 /* 44 * For the first processor also print the system type 45 */ 46 if (n == 0) 47 seq_printf(m, "system type\t\t: %s\n\n", get_system_type()); 48 49 seq_printf(m, "processor\t\t: %ld\n", n); 50 seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package); 51 seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core); 52 seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]); 53 seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]); 54 seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version); 55 seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version); 56 seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n", 57 cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100); 58 seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n", 59 (lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ), 60 ((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100); 61 seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize); 62 seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n", 63 cpu_pabits + 1, cpu_vabits + 1); 64 65 seq_printf(m, "ISA\t\t\t:"); 66 if (cpu_has_loongarch32) 67 seq_printf(m, " loongarch32"); 68 if (cpu_has_loongarch64) 69 seq_printf(m, " loongarch64"); 70 seq_printf(m, "\n"); 71 72 seq_printf(m, "Features\t\t:"); 73 if (cpu_has_cpucfg) seq_printf(m, " cpucfg"); 74 if (cpu_has_lam) seq_printf(m, " lam"); 75 if (cpu_has_ual) seq_printf(m, " ual"); 76 if (cpu_has_fpu) seq_printf(m, " fpu"); 77 if (cpu_has_lsx) seq_printf(m, " lsx"); 78 if (cpu_has_lasx) seq_printf(m, " lasx"); 79 if (cpu_has_crc32) seq_printf(m, " crc32"); 80 if (cpu_has_complex) seq_printf(m, " complex"); 81 if (cpu_has_crypto) seq_printf(m, " crypto"); 82 if (cpu_has_lvz) seq_printf(m, " lvz"); 83 if (cpu_has_lbt_x86) seq_printf(m, " lbt_x86"); 84 if (cpu_has_lbt_arm) seq_printf(m, " lbt_arm"); 85 if (cpu_has_lbt_mips) seq_printf(m, " lbt_mips"); 86 seq_printf(m, "\n"); 87 88 seq_printf(m, "Hardware Watchpoint\t: %s", 89 cpu_has_watch ? "yes, " : "no\n"); 90 if (cpu_has_watch) { 91 seq_printf(m, "iwatch count: %d, dwatch count: %d\n", 92 cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count); 93 } 94 95 proc_cpuinfo_notifier_args.m = m; 96 proc_cpuinfo_notifier_args.n = n; 97 98 raw_notifier_call_chain(&proc_cpuinfo_chain, 0, 99 &proc_cpuinfo_notifier_args); 100 101 seq_printf(m, "\n"); 102 103 return 0; 104 } 105 106 static void *c_start(struct seq_file *m, loff_t *pos) 107 { 108 unsigned long i = *pos; 109 110 return i < nr_cpu_ids ? (void *)(i + 1) : NULL; 111 } 112 113 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 114 { 115 ++*pos; 116 return c_start(m, pos); 117 } 118 119 static void c_stop(struct seq_file *m, void *v) 120 { 121 } 122 123 const struct seq_operations cpuinfo_op = { 124 .start = c_start, 125 .next = c_next, 126 .stop = c_stop, 127 .show = show_cpuinfo, 128 }; 129