arch/sh/kernel/cpu/sh2a/probe.c

   1 /*
   2  * arch/sh/kernel/cpu/sh2a/probe.c
   3  *
   4  * CPU Subtype Probing for SH-2A.
   5  *
   6  * Copyright (C) 2004 - 2007  Paul Mundt
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12 #include <linux/init.h>
  13 #include <asm/processor.h>
  14 #include <asm/cache.h>
  15
  16 int __init detect_cpu_and_cache_system(void)
  17 {
  18         boot_cpu_data.family                    = CPU_FAMILY_SH2A;
  19
  20         /* All SH-2A CPUs have support for 16 and 32-bit opcodes.. */
  21         boot_cpu_data.flags                     |= CPU_HAS_OP32;
  22
  23 #if defined(CONFIG_CPU_SUBTYPE_SH7201)
  24         boot_cpu_data.type                      = CPU_SH7201;
  25         boot_cpu_data.flags                     |= CPU_HAS_FPU;
  26 #elif defined(CONFIG_CPU_SUBTYPE_SH7203)
  27         boot_cpu_data.type                      = CPU_SH7203;
  28         boot_cpu_data.flags                     |= CPU_HAS_FPU;
  29 #elif defined(CONFIG_CPU_SUBTYPE_SH7263)
  30         boot_cpu_data.type                      = CPU_SH7263;
  31         boot_cpu_data.flags                     |= CPU_HAS_FPU;
  32 #elif defined(CONFIG_CPU_SUBTYPE_SH7206)
  33         boot_cpu_data.type                      = CPU_SH7206;
  34         boot_cpu_data.flags                     |= CPU_HAS_DSP;
  35 #elif defined(CONFIG_CPU_SUBTYPE_MXG)
  36         boot_cpu_data.type                      = CPU_MXG;
  37         boot_cpu_data.flags                     |= CPU_HAS_DSP;
  38 #endif
  39
  40         boot_cpu_data.dcache.ways               = 4;
  41         boot_cpu_data.dcache.way_incr           = (1 << 11);
  42         boot_cpu_data.dcache.sets               = 128;
  43         boot_cpu_data.dcache.entry_shift        = 4;
  44         boot_cpu_data.dcache.linesz             = L1_CACHE_BYTES;
  45         boot_cpu_data.dcache.flags              = 0;
  46
  47         /*
  48          * The icache is the same as the dcache as far as this setup is
  49          * concerned. The only real difference in hardware is that the icache
  50          * lacks the U bit that the dcache has, none of this has any bearing
  51          * on the cache info.
  52          */
  53         boot_cpu_data.icache            = boot_cpu_data.dcache;
  54
  55         return 0;
  56 }