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
register_proc_cpuinfo_notifier(struct notifier_block * nb)21 int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb)
22 {
23 return raw_notifier_chain_register(&proc_cpuinfo_chain, nb);
24 }
25
proc_cpuinfo_notifier_call_chain(unsigned long val,void * v)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
show_cpuinfo(struct seq_file * m,void * v)31 static int show_cpuinfo(struct seq_file *m, void *v)
32 {
33 unsigned long n = (unsigned long) v - 1;
34 unsigned int isa = cpu_data[n].isa_level;
35 unsigned int version = cpu_data[n].processor_id & 0xff;
36 unsigned int fp_version = cpu_data[n].fpu_vers;
37 struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args;
38
39 #ifdef CONFIG_SMP
40 if (!cpu_online(n))
41 return 0;
42 #endif
43
44 /*
45 * For the first processor also print the system type
46 */
47 if (n == 0)
48 seq_printf(m, "system type\t\t: %s\n\n", get_system_type());
49
50 seq_printf(m, "processor\t\t: %ld\n", n);
51 seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
52 seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
53 seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id);
54 seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]);
55 seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]);
56 seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version);
57 seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version);
58 seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n",
59 cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100);
60 seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n",
61 (lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ),
62 ((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100);
63 seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize);
64 seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n",
65 cpu_pabits + 1, cpu_vabits + 1);
66
67 seq_printf(m, "ISA\t\t\t:");
68 if (isa & LOONGARCH_CPU_ISA_LA32R)
69 seq_printf(m, " loongarch32r");
70 if (isa & LOONGARCH_CPU_ISA_LA32S)
71 seq_printf(m, " loongarch32s");
72 if (isa & LOONGARCH_CPU_ISA_LA64)
73 seq_printf(m, " loongarch64");
74 seq_printf(m, "\n");
75
76 seq_printf(m, "Features\t\t:");
77 if (cpu_has_cpucfg) seq_printf(m, " cpucfg");
78 if (cpu_has_lam) seq_printf(m, " lam");
79 if (cpu_has_ual) seq_printf(m, " ual");
80 if (cpu_has_fpu) seq_printf(m, " fpu");
81 if (cpu_has_lsx) seq_printf(m, " lsx");
82 if (cpu_has_lasx) seq_printf(m, " lasx");
83 if (cpu_has_crc32) seq_printf(m, " crc32");
84 if (cpu_has_complex) seq_printf(m, " complex");
85 if (cpu_has_crypto) seq_printf(m, " crypto");
86 if (cpu_has_ptw) seq_printf(m, " ptw");
87 if (cpu_has_lspw) seq_printf(m, " lspw");
88 if (cpu_has_lvz) seq_printf(m, " lvz");
89 if (cpu_has_lbt_x86) seq_printf(m, " lbt_x86");
90 if (cpu_has_lbt_arm) seq_printf(m, " lbt_arm");
91 if (cpu_has_lbt_mips) seq_printf(m, " lbt_mips");
92 seq_printf(m, "\n");
93
94 seq_printf(m, "Hardware Watchpoint\t: %s",
95 cpu_has_watch ? "yes, " : "no\n");
96 if (cpu_has_watch) {
97 seq_printf(m, "iwatch count: %d, dwatch count: %d\n",
98 cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);
99 }
100
101 proc_cpuinfo_notifier_args.m = m;
102 proc_cpuinfo_notifier_args.n = n;
103
104 raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
105 &proc_cpuinfo_notifier_args);
106
107 seq_printf(m, "\n");
108
109 return 0;
110 }
111
c_start(struct seq_file * m,loff_t * pos)112 static void *c_start(struct seq_file *m, loff_t *pos)
113 {
114 unsigned long i = *pos;
115
116 return i < nr_cpu_ids ? (void *)(i + 1) : NULL;
117 }
118
c_next(struct seq_file * m,void * v,loff_t * pos)119 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
120 {
121 ++*pos;
122 return c_start(m, pos);
123 }
124
c_stop(struct seq_file * m,void * v)125 static void c_stop(struct seq_file *m, void *v)
126 {
127 }
128
129 const struct seq_operations cpuinfo_op = {
130 .start = c_start,
131 .next = c_next,
132 .stop = c_stop,
133 .show = show_cpuinfo,
134 };
135