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 static int show_cpuinfo(struct seq_file *m, void *v) 17 { 18 unsigned long n = (unsigned long) v - 1; 19 unsigned int isa = cpu_data[n].isa_level; 20 unsigned int prid = cpu_data[n].processor_id; 21 unsigned int version = cpu_data[n].processor_id & 0xff; 22 unsigned int fp_version = cpu_data[n].fpu_vers; 23 u64 freq = cpu_clock_freq, bogomips = lpj_fine * cpu_clock_freq; 24 25 #ifdef CONFIG_SMP 26 if (!cpu_online(n)) 27 return 0; 28 #endif 29 do_div(freq, 10000); 30 do_div(bogomips, const_clock_freq * (5000/HZ)); 31 32 /* 33 * For the first processor also print the system type 34 */ 35 if (n == 0) 36 seq_printf(m, "system type\t\t: %s\n\n", get_system_type()); 37 38 seq_printf(m, "processor\t\t: %ld\n", n); 39 seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package); 40 seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core); 41 seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id); 42 seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]); 43 seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]); 44 seq_printf(m, "PRID\t\t\t: %s (%08x)\n", id_to_core_name(prid), prid); 45 seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version); 46 seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version); 47 seq_printf(m, "CPU MHz\t\t\t: %u.%02u\n", (u32)freq / 100, (u32)freq % 100); 48 seq_printf(m, "BogoMIPS\t\t: %u.%02u\n", (u32)bogomips / 100, (u32)bogomips % 100); 49 seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize); 50 seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n", 51 cpu_pabits + 1, cpu_vabits + 1); 52 53 seq_puts(m, "ISA\t\t\t:"); 54 if (isa & LOONGARCH_CPU_ISA_LA32R) 55 seq_puts(m, " loongarch32r"); 56 if (isa & LOONGARCH_CPU_ISA_LA32S) 57 seq_puts(m, " loongarch32s"); 58 if (isa & LOONGARCH_CPU_ISA_LA64) 59 seq_puts(m, " loongarch64"); 60 seq_puts(m, "\n"); 61 62 seq_puts(m, "Features\t\t:"); 63 if (cpu_has_cpucfg) 64 seq_puts(m, " cpucfg"); 65 if (cpu_has_lam) 66 seq_puts(m, " lam"); 67 if (cpu_has_scq) 68 seq_puts(m, " scq"); 69 if (cpu_has_ual) 70 seq_puts(m, " ual"); 71 if (cpu_has_fpu) 72 seq_puts(m, " fpu"); 73 if (cpu_has_lsx) 74 seq_puts(m, " lsx"); 75 if (cpu_has_lasx) 76 seq_puts(m, " lasx"); 77 if (cpu_has_crc32) 78 seq_puts(m, " crc32"); 79 if (cpu_has_complex) 80 seq_puts(m, " complex"); 81 if (cpu_has_crypto) 82 seq_puts(m, " crypto"); 83 if (cpu_has_ptw) 84 seq_puts(m, " ptw"); 85 if (cpu_has_lspw) 86 seq_puts(m, " lspw"); 87 if (cpu_has_lvz) 88 seq_puts(m, " lvz"); 89 if (cpu_has_lbt_x86) 90 seq_puts(m, " lbt_x86"); 91 if (cpu_has_lbt_arm) 92 seq_puts(m, " lbt_arm"); 93 if (cpu_has_lbt_mips) 94 seq_puts(m, " lbt_mips"); 95 seq_puts(m, "\n"); 96 97 seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch)); 98 if (cpu_has_watch) { 99 seq_printf(m, ", iwatch count: %d, dwatch count: %d", 100 cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count); 101 } 102 103 seq_puts(m, "\n\n"); 104 105 return 0; 106 } 107 108 static void *c_start(struct seq_file *m, loff_t *pos) 109 { 110 unsigned long i = *pos; 111 112 return i < nr_cpu_ids ? (void *)(i + 1) : NULL; 113 } 114 115 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 116 { 117 ++*pos; 118 return c_start(m, pos); 119 } 120 121 static void c_stop(struct seq_file *m, void *v) 122 { 123 } 124 125 const struct seq_operations cpuinfo_op = { 126 .start = c_start, 127 .next = c_next, 128 .stop = c_stop, 129 .show = show_cpuinfo, 130 }; 131