xref: /openbmc/linux/arch/microblaze/kernel/cpu/mb.c (revision 4800cd83)
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 
28 static int show_cpuinfo(struct seq_file *m, void *v)
29 {
30 	int count = 0;
31 	char *fpga_family = "Unknown";
32 	char *cpu_ver = "Unknown";
33 	int i;
34 
35 	/* Denormalised to get the fpga family string */
36 	for (i = 0; family_string_lookup[i].s != NULL; i++) {
37 		if (cpuinfo.fpga_family_code == family_string_lookup[i].k) {
38 			fpga_family = (char *)family_string_lookup[i].s;
39 			break;
40 		}
41 	}
42 
43 	/* Denormalised to get the hw version string */
44 	for (i = 0; cpu_ver_lookup[i].s != NULL; i++) {
45 		if (cpuinfo.ver_code == cpu_ver_lookup[i].k) {
46 			cpu_ver = (char *)cpu_ver_lookup[i].s;
47 			break;
48 		}
49 	}
50 
51 	count = seq_printf(m,
52 			"CPU-Family:	MicroBlaze\n"
53 			"FPGA-Arch:	%s\n"
54 			"CPU-Ver:	%s, %s endian\n"
55 			"CPU-MHz:	%d.%02d\n"
56 			"BogoMips:	%lu.%02lu\n",
57 			fpga_family,
58 			cpu_ver,
59 			cpuinfo.endian ? "little" : "big",
60 			cpuinfo.cpu_clock_freq /
61 			1000000,
62 			cpuinfo.cpu_clock_freq %
63 			1000000,
64 			loops_per_jiffy / (500000 / HZ),
65 			(loops_per_jiffy / (5000 / HZ)) % 100);
66 
67 	count += seq_printf(m,
68 		"HW:\n Shift:\t\t%s\n"
69 		" MSR:\t\t%s\n"
70 		" PCMP:\t\t%s\n"
71 		" DIV:\t\t%s\n",
72 		(cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
73 		(cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
74 		(cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
75 		(cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
76 
77 	count += seq_printf(m,
78 			" MMU:\t\t%x\n",
79 			cpuinfo.mmu);
80 
81 	count += seq_printf(m,
82 		" MUL:\t\t%s\n"
83 		" FPU:\t\t%s\n",
84 		(cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
85 			(cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
86 		(cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
87 			(cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
88 
89 	count += seq_printf(m,
90 		" Exc:\t\t%s%s%s%s%s%s%s%s\n",
91 		(cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
92 		(cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
93 		(cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
94 		(cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
95 		(cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
96 		(cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
97 		(cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
98 		(cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
99 
100 	if (cpuinfo.use_icache)
101 		count += seq_printf(m,
102 				"Icache:\t\t%ukB\tline length:\t%dB\n",
103 				cpuinfo.icache_size >> 10,
104 				cpuinfo.icache_line_length);
105 	else
106 		count += seq_printf(m, "Icache:\t\tno\n");
107 
108 	if (cpuinfo.use_dcache) {
109 		count += seq_printf(m,
110 				"Dcache:\t\t%ukB\tline length:\t%dB\n",
111 				cpuinfo.dcache_size >> 10,
112 				cpuinfo.dcache_line_length);
113 		if (cpuinfo.dcache_wb)
114 			count += seq_printf(m, "\t\twrite-back\n");
115 		else
116 			count += seq_printf(m, "\t\twrite-through\n");
117 	} else
118 		count += seq_printf(m, "Dcache:\t\tno\n");
119 
120 	count += seq_printf(m,
121 			"HW-Debug:\t%s\n",
122 			cpuinfo.hw_debug ? "yes" : "no");
123 
124 	count += seq_printf(m,
125 			"PVR-USR1:\t%02x\n"
126 			"PVR-USR2:\t%08x\n",
127 			cpuinfo.pvr_user1,
128 			cpuinfo.pvr_user2);
129 
130 	count += seq_printf(m, "Page size:\t%lu\n", PAGE_SIZE);
131 	return 0;
132 }
133 
134 static void *c_start(struct seq_file *m, loff_t *pos)
135 {
136 	int i = *pos;
137 
138 	return i < NR_CPUS ? (void *) (i + 1) : NULL;
139 }
140 
141 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
142 {
143 	++*pos;
144 	return c_start(m, pos);
145 }
146 
147 static void c_stop(struct seq_file *m, void *v)
148 {
149 }
150 
151 const struct seq_operations cpuinfo_op = {
152 	.start = c_start,
153 	.next = c_next,
154 	.stop = c_stop,
155 	.show = show_cpuinfo,
156 };
157