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_printf(m, "ISA\t\t\t:"); 54 if (isa & LOONGARCH_CPU_ISA_LA32R) 55 seq_printf(m, " loongarch32r"); 56 if (isa & LOONGARCH_CPU_ISA_LA32S) 57 seq_printf(m, " loongarch32s"); 58 if (isa & LOONGARCH_CPU_ISA_LA64) 59 seq_printf(m, " loongarch64"); 60 seq_printf(m, "\n"); 61 62 seq_printf(m, "Features\t\t:"); 63 if (cpu_has_cpucfg) seq_printf(m, " cpucfg"); 64 if (cpu_has_lam) seq_printf(m, " lam"); 65 if (cpu_has_ual) seq_printf(m, " ual"); 66 if (cpu_has_fpu) seq_printf(m, " fpu"); 67 if (cpu_has_lsx) seq_printf(m, " lsx"); 68 if (cpu_has_lasx) seq_printf(m, " lasx"); 69 if (cpu_has_crc32) seq_printf(m, " crc32"); 70 if (cpu_has_complex) seq_printf(m, " complex"); 71 if (cpu_has_crypto) seq_printf(m, " crypto"); 72 if (cpu_has_ptw) seq_printf(m, " ptw"); 73 if (cpu_has_lspw) seq_printf(m, " lspw"); 74 if (cpu_has_lvz) seq_printf(m, " lvz"); 75 if (cpu_has_lbt_x86) seq_printf(m, " lbt_x86"); 76 if (cpu_has_lbt_arm) seq_printf(m, " lbt_arm"); 77 if (cpu_has_lbt_mips) seq_printf(m, " lbt_mips"); 78 seq_printf(m, "\n"); 79 80 seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch)); 81 if (cpu_has_watch) { 82 seq_printf(m, ", iwatch count: %d, dwatch count: %d", 83 cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count); 84 } 85 86 seq_printf(m, "\n\n"); 87 88 return 0; 89 } 90 91 static void *c_start(struct seq_file *m, loff_t *pos) 92 { 93 unsigned long i = *pos; 94 95 return i < nr_cpu_ids ? (void *)(i + 1) : NULL; 96 } 97 98 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 99 { 100 ++*pos; 101 return c_start(m, pos); 102 } 103 104 static void c_stop(struct seq_file *m, void *v) 105 { 106 } 107 108 const struct seq_operations cpuinfo_op = { 109 .start = c_start, 110 .next = c_next, 111 .stop = c_stop, 112 .show = show_cpuinfo, 113 }; 114