arch/sh/kernel/cpu/sh2/probe.c

   1 /*
   2  * arch/sh/kernel/cpu/sh2/probe.c
   3  *
   4  * CPU Subtype Probing for SH-2.
   5  *
   6  * Copyright (C) 2002 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
  13
  14 #include <linux/init.h>
  15 #include <asm/processor.h>
  16 #include <asm/cache.h>
  17
  18 int __init detect_cpu_and_cache_system(void)
  19 {
  20 #if defined(CONFIG_CPU_SUBTYPE_SH7604)
  21         current_cpu_data.type                   = CPU_SH7604;
  22         current_cpu_data.dcache.ways            = 4;
  23         current_cpu_data.dcache.way_incr        = (1<<10);
  24         current_cpu_data.dcache.sets            = 64;
  25         current_cpu_data.dcache.entry_shift     = 4;
  26         current_cpu_data.dcache.linesz          = L1_CACHE_BYTES;
  27         current_cpu_data.dcache.flags           = 0;
  28 #elif defined(CONFIG_CPU_SUBTYPE_SH7619)
  29         current_cpu_data.type                   = CPU_SH7619;
  30         current_cpu_data.dcache.ways            = 4;
  31         current_cpu_data.dcache.way_incr        = (1<<12);
  32         current_cpu_data.dcache.sets            = 256;
  33         current_cpu_data.dcache.entry_shift     = 4;
  34         current_cpu_data.dcache.linesz          = L1_CACHE_BYTES;
  35         current_cpu_data.dcache.flags           = 0;
  36 #endif
  37         /*
  38          * SH-2 doesn't have separate caches
  39          */
  40         current_cpu_data.dcache.flags |= SH_CACHE_COMBINED;
  41         current_cpu_data.icache = current_cpu_data.dcache;
  42
  43         return 0;
  44 }
  45