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
28static 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
136static 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
143static void *c_next(struct seq_file *m, void *v, loff_t *pos)
144{
145	++*pos;
146	return c_start(m, pos);
147}
148
149static void c_stop(struct seq_file *m, void *v)
150{
151}
152
153const struct seq_operations cpuinfo_op = {
154	.start = c_start,
155	.next = c_next,
156	.stop = c_stop,
157	.show = show_cpuinfo,
158};
159