1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/seq_file.h>
3 #include <linux/kernel.h>
4 #include <linux/module.h>
5 #include <asm/machvec.h>
6 #include <asm/processor.h>
7
8 static const char *cpu_name[] = {
9 [CPU_SH7201] = "SH7201",
10 [CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
11 [CPU_SH7264] = "SH7264", [CPU_SH7269] = "SH7269",
12 [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
13 [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
14 [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
15 [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
16 [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
17 [CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
18 [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
19 [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
20 [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
21 [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
22 [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
23 [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
24 [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
25 [CPU_SH7786] = "SH7786", [CPU_SH7757] = "SH7757",
26 [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
27 [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723",
28 [CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724",
29 [CPU_SH7372] = "SH7372", [CPU_SH7734] = "SH7734",
30 [CPU_J2] = "J2",
31 [CPU_SH_NONE] = "Unknown"
32 };
33
get_cpu_subtype(struct sh_cpuinfo * c)34 const char *get_cpu_subtype(struct sh_cpuinfo *c)
35 {
36 return cpu_name[c->type];
37 }
38 EXPORT_SYMBOL(get_cpu_subtype);
39
40 #ifdef CONFIG_PROC_FS
41 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
42 static const char *cpu_flags[] = {
43 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
44 "ptea", "llsc", "l2", "op32", "pteaex", NULL
45 };
46
show_cpuflags(struct seq_file * m,struct sh_cpuinfo * c)47 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
48 {
49 unsigned long i;
50
51 seq_printf(m, "cpu flags\t:");
52
53 if (!c->flags) {
54 seq_printf(m, " %s\n", cpu_flags[0]);
55 return;
56 }
57
58 for (i = 0; cpu_flags[i]; i++)
59 if ((c->flags & (1 << i)))
60 seq_printf(m, " %s", cpu_flags[i+1]);
61
62 seq_printf(m, "\n");
63 }
64
show_cacheinfo(struct seq_file * m,const char * type,struct cache_info info)65 static void show_cacheinfo(struct seq_file *m, const char *type,
66 struct cache_info info)
67 {
68 unsigned int cache_size;
69
70 cache_size = info.ways * info.sets * info.linesz;
71
72 seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
73 type, cache_size >> 10, info.ways);
74 }
75
76 /*
77 * Get CPU information for use by the procfs.
78 */
show_cpuinfo(struct seq_file * m,void * v)79 static int show_cpuinfo(struct seq_file *m, void *v)
80 {
81 struct sh_cpuinfo *c = v;
82 unsigned int cpu = c - cpu_data;
83
84 if (!cpu_online(cpu))
85 return 0;
86
87 if (cpu == 0)
88 seq_printf(m, "machine\t\t: %s\n", get_system_type());
89 else
90 seq_printf(m, "\n");
91
92 seq_printf(m, "processor\t: %d\n", cpu);
93 seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
94 seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
95 if (c->cut_major == -1)
96 seq_printf(m, "cut\t\t: unknown\n");
97 else if (c->cut_minor == -1)
98 seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
99 else
100 seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
101
102 show_cpuflags(m, c);
103
104 seq_printf(m, "cache type\t: ");
105
106 /*
107 * Check for what type of cache we have, we support both the
108 * unified cache on the SH-2 and SH-3, as well as the harvard
109 * style cache on the SH-4.
110 */
111 if (c->icache.flags & SH_CACHE_COMBINED) {
112 seq_printf(m, "unified\n");
113 show_cacheinfo(m, "cache", c->icache);
114 } else {
115 seq_printf(m, "split (harvard)\n");
116 show_cacheinfo(m, "icache", c->icache);
117 show_cacheinfo(m, "dcache", c->dcache);
118 }
119
120 /* Optional secondary cache */
121 if (c->flags & CPU_HAS_L2_CACHE)
122 show_cacheinfo(m, "scache", c->scache);
123
124 seq_printf(m, "address sizes\t: %u bits physical\n", c->phys_bits);
125
126 seq_printf(m, "bogomips\t: %lu.%02lu\n",
127 c->loops_per_jiffy/(500000/HZ),
128 (c->loops_per_jiffy/(5000/HZ)) % 100);
129
130 return 0;
131 }
132
c_start(struct seq_file * m,loff_t * pos)133 static void *c_start(struct seq_file *m, loff_t *pos)
134 {
135 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
136 }
c_next(struct seq_file * m,void * v,loff_t * pos)137 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
138 {
139 ++*pos;
140 return c_start(m, pos);
141 }
c_stop(struct seq_file * m,void * v)142 static void c_stop(struct seq_file *m, void *v)
143 {
144 }
145 const struct seq_operations cpuinfo_op = {
146 .start = c_start,
147 .next = c_next,
148 .stop = c_stop,
149 .show = show_cpuinfo,
150 };
151 #endif /* CONFIG_PROC_FS */
152