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