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
show_cpuinfo(struct seq_file * m,void * v)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_lam_bh)
68 seq_puts(m, " lam_bh");
69 if (cpu_has_scq)
70 seq_puts(m, " scq");
71 if (cpu_has_ual)
72 seq_puts(m, " ual");
73 if (cpu_has_fpu)
74 seq_puts(m, " fpu");
75 if (cpu_has_lsx)
76 seq_puts(m, " lsx");
77 if (cpu_has_lasx)
78 seq_puts(m, " lasx");
79 if (cpu_has_crc32)
80 seq_puts(m, " crc32");
81 if (cpu_has_complex)
82 seq_puts(m, " complex");
83 if (cpu_has_crypto)
84 seq_puts(m, " crypto");
85 if (cpu_has_ptw)
86 seq_puts(m, " ptw");
87 if (cpu_has_lspw)
88 seq_puts(m, " lspw");
89 if (cpu_has_lvz)
90 seq_puts(m, " lvz");
91 if (cpu_has_lbt_x86)
92 seq_puts(m, " lbt_x86");
93 if (cpu_has_lbt_arm)
94 seq_puts(m, " lbt_arm");
95 if (cpu_has_lbt_mips)
96 seq_puts(m, " lbt_mips");
97 seq_puts(m, "\n");
98
99 seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch));
100 if (cpu_has_watch) {
101 seq_printf(m, ", iwatch count: %d, dwatch count: %d",
102 cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);
103 }
104
105 seq_puts(m, "\n\n");
106
107 return 0;
108 }
109
c_start(struct seq_file * m,loff_t * pos)110 static void *c_start(struct seq_file *m, loff_t *pos)
111 {
112 unsigned long i = *pos;
113
114 return i < nr_cpu_ids ? (void *)(i + 1) : NULL;
115 }
116
c_next(struct seq_file * m,void * v,loff_t * pos)117 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
118 {
119 ++*pos;
120 return c_start(m, pos);
121 }
122
c_stop(struct seq_file * m,void * v)123 static void c_stop(struct seq_file *m, void *v)
124 {
125 }
126
127 const struct seq_operations cpuinfo_op = {
128 .start = c_start,
129 .next = c_next,
130 .stop = c_stop,
131 .show = show_cpuinfo,
132 };
133