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
  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 };