/arch/microblaze/kernel/cpu/mb.c

  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\n"
 55			"CPU-MHz:	%d.%02d\n"
 56			"BogoMips:	%lu.%02lu\n",
 57			fpga_family,
 58			cpu_ver,
 59			cpuinfo.cpu_clock_freq /
 60			1000000,
 61			cpuinfo.cpu_clock_freq %
 62			1000000,
 63			loops_per_jiffy / (500000 / HZ),
 64			(loops_per_jiffy / (5000 / HZ)) % 100);
 65
 66	count += seq_printf(m,
 67		"HW:\n Shift:\t\t%s\n"
 68		" MSR:\t\t%s\n"
 69		" PCMP:\t\t%s\n"
 70		" DIV:\t\t%s\n",
 71		(cpuinfo.use_instr & PVR0_USE_BARREL_MASK) ? "yes" : "no",
 72		(cpuinfo.use_instr & PVR2_USE_MSR_INSTR) ? "yes" : "no",
 73		(cpuinfo.use_instr & PVR2_USE_PCMP_INSTR) ? "yes" : "no",
 74		(cpuinfo.use_instr & PVR0_USE_DIV_MASK) ? "yes" : "no");
 75
 76	count += seq_printf(m,
 77			" MMU:\t\t%x\n",
 78			cpuinfo.mmu);
 79
 80	count += seq_printf(m,
 81		" MUL:\t\t%s\n"
 82		" FPU:\t\t%s\n",
 83		(cpuinfo.use_mult & PVR2_USE_MUL64_MASK) ? "v2" :
 84			(cpuinfo.use_mult & PVR0_USE_HW_MUL_MASK) ? "v1" : "no",
 85		(cpuinfo.use_fpu & PVR2_USE_FPU2_MASK) ? "v2" :
 86			(cpuinfo.use_fpu & PVR0_USE_FPU_MASK) ? "v1" : "no");
 87
 88	count += seq_printf(m,
 89		" Exc:\t\t%s%s%s%s%s%s%s%s\n",
 90		(cpuinfo.use_exc & PVR2_OPCODE_0x0_ILL_MASK) ? "op0x0 " : "",
 91		(cpuinfo.use_exc & PVR2_UNALIGNED_EXC_MASK) ? "unal " : "",
 92		(cpuinfo.use_exc & PVR2_ILL_OPCODE_EXC_MASK) ? "ill " : "",
 93		(cpuinfo.use_exc & PVR2_IOPB_BUS_EXC_MASK) ? "iopb " : "",
 94		(cpuinfo.use_exc & PVR2_DOPB_BUS_EXC_MASK) ? "dopb " : "",
 95		(cpuinfo.use_exc & PVR2_DIV_ZERO_EXC_MASK) ? "zero " : "",
 96		(cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "",
 97		(cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : "");
 98
 99	if (cpuinfo.use_icache)
100		count += 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		count += seq_printf(m, "Icache:\t\tno\n");
106
107	if (cpuinfo.use_dcache) {
108		count += seq_printf(m,
109				"Dcache:\t\t%ukB\tline length:\t%dB\n",
110				cpuinfo.dcache_size >> 10,
111				cpuinfo.dcache_line_length);
112		if (cpuinfo.dcache_wb)
113			count += seq_printf(m, "\t\twrite-back\n");
114		else
115			count += seq_printf(m, "\t\twrite-through\n");
116	} else
117		count += seq_printf(m, "Dcache:\t\tno\n");
118
119	count += seq_printf(m,
120			"HW-Debug:\t%s\n",
121			cpuinfo.hw_debug ? "yes" : "no");
122
123	count += seq_printf(m,
124			"PVR-USR1:\t%02x\n"
125			"PVR-USR2:\t%08x\n",
126			cpuinfo.pvr_user1,
127			cpuinfo.pvr_user2);
128
129	return 0;
130}
131
132static void *c_start(struct seq_file *m, loff_t *pos)
133{
134	int i = *pos;
135
136	return i < NR_CPUS ? (void *) (i + 1) : NULL;
137}
138
139static void *c_next(struct seq_file *m, void *v, loff_t *pos)
140{
141	++*pos;
142	return c_start(m, pos);
143}
144
145static void c_stop(struct seq_file *m, void *v)
146{
147}
148
149const struct seq_operations cpuinfo_op = {
150	.start = c_start,
151	.next = c_next,
152	.stop = c_stop,
153	.show = show_cpuinfo,
154};