xref: /openbmc/linux/arch/microblaze/kernel/cpu/mb.c (revision 81f0cd97)
1 /*
2  * CPU-version specific code
3  *
4  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
5  * Copyright (C) 2006-2009 PetaLogix
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License. See the file "COPYING" in the main directory of this archive
9  * for more details.
10  */
11 
12 #include <linux/init.h>
13 #include <linux/string.h>
14 #include <linux/seq_file.h>
15 #include <linux/cpu.h>
16 #include <linux/initrd.h>
17 
18 #include <linux/bug.h>
19 #include <asm/cpuinfo.h>
20 #include <linux/delay.h>
21 #include <linux/io.h>
22 #include <asm/page.h>
23 #include <linux/param.h>
24 #include <asm/pvr.h>
25 #include <asm/sections.h>
26 #include <asm/setup.h>
27 
show_cpuinfo(struct seq_file * m,void * v)28 static int show_cpuinfo(struct seq_file *m, void *v)
29 {
30 	char *fpga_family = "Unknown";
31 	char *cpu_ver = "Unknown";
32 	int i;
33 
34 	/* Denormalised to get the fpga family string */
35 	for (i = 0; family_string_lookup[i].s != NULL; i++) {
36 		if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
37 			fpga_family = (char *)family_string_lookup[i].s;
38 			break;
39 		}
40 	}
41 
42 	/* Denormalised to get the hw version string */
43 	for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
44 		if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
45 			cpu_ver = (char *)cpu_ver_lookup[i].s;
46 			break;
47 		}
48 	}
49 
50 	seq_printf(m,
51 		   "CPU-Family:	MicroBlaze\n"
52 		   "FPGA-Arch:	%s\n"
53 		   "CPU-Ver:	%s, %s endian\n"
54 		   "CPU-MHz:	%d.%02d\n"
55 		   "BogoMips:	%lu.%02lu\n",
56 		   fpga_family,
57 		   cpu_ver,
58 		   cpuinfo.endian ? "little" : "big",
59 		   cpuinfo.cpu_clock_freq / 1000000,
60 		   cpuinfo.cpu_clock_freq % 1000000,
61 		   loops_per_jiffy / (500000 / HZ),
62 		   (loops_per_jiffy / (5000 / HZ)) % 100);
63 
64 	seq_printf(m,
65 		   "HW:\n Shift:\t\t%s\n"
66 		   " MSR:\t\t%s\n"
67 		   " PCMP:\t\t%s\n"
68 		   " DIV:\t\t%s\n",
69 		   (cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
70 		   (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
71 		   (cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
72 		   (cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
73 
74 	seq_printf(m, " MMU:\t\t%x\n", cpuinfo.mmu);
75 
76 	seq_printf(m,
77 		   " MUL:\t\t%s\n"
78 		   " FPU:\t\t%s\n",
79 		   (cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
80 		   (cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
81 		   (cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
82 		   (cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
83 
84 	seq_printf(m,
85 		   " Exc:\t\t%s%s%s%s%s%s%s%s\n",
86 		   (cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
87 		   (cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
88 		   (cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
89 		   (cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
90 		   (cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
91 		   (cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
92 		   (cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
93 		   (cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
94 
95 	seq_printf(m,
96 		   "Stream-insns:\t%sprivileged\n",
97 		   cpuinfo.mmu_privins ? "un" : "");
98 
99 	if (cpuinfo.use_icache)
100 		seq_printf(m,
101 			   "Icache:\t\t%ukB\tline length:\t%dB\n",
102 			   cpuinfo.icache_size >> 10,
103 			   cpuinfo.icache_line_length);
104 	else
105 		seq_puts(m, "Icache:\t\tno\n");
106 
107 	if (cpuinfo.use_dcache) {
108 		seq_printf(m,
109 			   "Dcache:\t\t%ukB\tline length:\t%dB\n",
110 			   cpuinfo.dcache_size >> 10,
111 			   cpuinfo.dcache_line_length);
112 		seq_puts(m, "Dcache-Policy:\t");
113 		if (cpuinfo.dcache_wb)
114 			seq_puts(m, "write-back\n");
115 		else
116 			seq_puts(m, "write-through\n");
117 	} else {
118 		seq_puts(m, "Dcache:\t\tno\n");
119 	}
120 
121 	seq_printf(m,
122 		   "HW-Debug:\t%s\n",
123 		   cpuinfo.hw_debug ? "yes" : "no");
124 
125 	seq_printf(m,
126 		   "PVR-USR1:\t%02x\n"
127 		   "PVR-USR2:\t%08x\n",
128 		   cpuinfo.pvr_user1,
129 		   cpuinfo.pvr_user2);
130 
131 	seq_printf(m, "Page size:\t%lu\n", PAGE_SIZE);
132 
133 	return 0;
134 }
135 
c_start(struct seq_file * m,loff_t * pos)136 static void *c_start(struct seq_file *m, loff_t *pos)
137 {
138 	int i = *pos;
139 
140 	return i < NR_CPUS ? (void *) (i + 1) : NULL;
141 }
142 
c_next(struct seq_file * m,void * v,loff_t * pos)143 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
144 {
145 	++*pos;
146 	return c_start(m, pos);
147 }
148 
c_stop(struct seq_file * m,void * v)149 static void c_stop(struct seq_file *m, void *v)
150 {
151 }
152 
153 const struct seq_operations cpuinfo_op = {
154 	.start = c_start,
155 	.next = c_next,
156 	.stop = c_stop,
157 	.show = show_cpuinfo,
158 };
159