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(nh: &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(nh: &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(cpu: 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, fmt: "system type\t\t: %s\n\n" , get_system_type()); |
48 | |
49 | seq_printf(m, fmt: "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, "global_id\t\t: %d\n" , cpu_data[n].global_id); |
53 | seq_printf(m, "CPU Family\t\t: %s\n" , __cpu_family[n]); |
54 | seq_printf(m, "Model Name\t\t: %s\n" , __cpu_full_name[n]); |
55 | seq_printf(m, fmt: "CPU Revision\t\t: 0x%02x\n" , version); |
56 | seq_printf(m, fmt: "FPU Revision\t\t: 0x%02x\n" , fp_version); |
57 | seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n" , |
58 | cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100); |
59 | seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n" , |
60 | (lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ), |
61 | ((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100); |
62 | seq_printf(m, "TLB Entries\t\t: %d\n" , cpu_data[n].tlbsize); |
63 | seq_printf(m, fmt: "Address Sizes\t\t: %d bits physical, %d bits virtual\n" , |
64 | cpu_pabits + 1, cpu_vabits + 1); |
65 | |
66 | seq_printf(m, fmt: "ISA\t\t\t:" ); |
67 | if (cpu_has_loongarch32) |
68 | seq_printf(m, fmt: " loongarch32" ); |
69 | if (cpu_has_loongarch64) |
70 | seq_printf(m, fmt: " loongarch64" ); |
71 | seq_printf(m, fmt: "\n" ); |
72 | |
73 | seq_printf(m, fmt: "Features\t\t:" ); |
74 | if (cpu_has_cpucfg) seq_printf(m, fmt: " cpucfg" ); |
75 | if (cpu_has_lam) seq_printf(m, fmt: " lam" ); |
76 | if (cpu_has_ual) seq_printf(m, fmt: " ual" ); |
77 | if (cpu_has_fpu) seq_printf(m, fmt: " fpu" ); |
78 | if (cpu_has_lsx) seq_printf(m, fmt: " lsx" ); |
79 | if (cpu_has_lasx) seq_printf(m, fmt: " lasx" ); |
80 | if (cpu_has_crc32) seq_printf(m, fmt: " crc32" ); |
81 | if (cpu_has_complex) seq_printf(m, fmt: " complex" ); |
82 | if (cpu_has_crypto) seq_printf(m, fmt: " crypto" ); |
83 | if (cpu_has_ptw) seq_printf(m, fmt: " ptw" ); |
84 | if (cpu_has_lvz) seq_printf(m, fmt: " lvz" ); |
85 | if (cpu_has_lbt_x86) seq_printf(m, fmt: " lbt_x86" ); |
86 | if (cpu_has_lbt_arm) seq_printf(m, fmt: " lbt_arm" ); |
87 | if (cpu_has_lbt_mips) seq_printf(m, fmt: " lbt_mips" ); |
88 | seq_printf(m, fmt: "\n" ); |
89 | |
90 | seq_printf(m, fmt: "Hardware Watchpoint\t: %s" , |
91 | cpu_has_watch ? "yes, " : "no\n" ); |
92 | if (cpu_has_watch) { |
93 | seq_printf(m, "iwatch count: %d, dwatch count: %d\n" , |
94 | cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count); |
95 | } |
96 | |
97 | proc_cpuinfo_notifier_args.m = m; |
98 | proc_cpuinfo_notifier_args.n = n; |
99 | |
100 | raw_notifier_call_chain(nh: &proc_cpuinfo_chain, val: 0, |
101 | v: &proc_cpuinfo_notifier_args); |
102 | |
103 | seq_printf(m, fmt: "\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 | |