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