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	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		   str_yes_no(cpuinfo.use_instr & PVR0_USE_BARREL_MASK),
 70		   str_yes_no(cpuinfo.use_instr & PVR2_USE_MSR_INSTR),
 71		   str_yes_no(cpuinfo.use_instr & PVR2_USE_PCMP_INSTR),
 72		   str_yes_no(cpuinfo.use_instr & PVR0_USE_DIV_MASK));
 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		   str_yes_no(cpuinfo.hw_debug));
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};