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	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	count += seq_printf(m,
101			"Stream-insns:\t%sprivileged\n",
102			cpuinfo.mmu_privins ? "un" : "");
103
104	if (cpuinfo.use_icache)
105		count += seq_printf(m,
106				"Icache:\t\t%ukB\tline length:\t%dB\n",
107				cpuinfo.icache_size >> 10,
108				cpuinfo.icache_line_length);
109	else
110		count += seq_printf(m, "Icache:\t\tno\n");
111
112	if (cpuinfo.use_dcache) {
113		count += seq_printf(m,
114				"Dcache:\t\t%ukB\tline length:\t%dB\n",
115				cpuinfo.dcache_size >> 10,
116				cpuinfo.dcache_line_length);
117		seq_printf(m, "Dcache-Policy:\t");
118		if (cpuinfo.dcache_wb)
119			count += seq_printf(m, "write-back\n");
120		else
121			count += seq_printf(m, "write-through\n");
122	} else
123		count += seq_printf(m, "Dcache:\t\tno\n");
124
125	count += seq_printf(m,
126			"HW-Debug:\t%s\n",
127			cpuinfo.hw_debug ? "yes" : "no");
128
129	count += seq_printf(m,
130			"PVR-USR1:\t%02x\n"
131			"PVR-USR2:\t%08x\n",
132			cpuinfo.pvr_user1,
133			cpuinfo.pvr_user2);
134
135	count += seq_printf(m, "Page size:\t%lu\n", PAGE_SIZE);
136	return 0;
137}
138
139static void *c_start(struct seq_file *m, loff_t *pos)
140{
141	int i = *pos;
142
143	return i < NR_CPUS ? (void *) (i + 1) : NULL;
144}
145
146static void *c_next(struct seq_file *m, void *v, loff_t *pos)
147{
148	++*pos;
149	return c_start(m, pos);
150}
151
152static void c_stop(struct seq_file *m, void *v)
153{
154}
155
156const struct seq_operations cpuinfo_op = {
157	.start = c_start,
158	.next = c_next,
159	.stop = c_stop,
160	.show = show_cpuinfo,
161};
162