arch/mips/au1000/common/cputable.c

   1 /*
   2  *  arch/mips/au1000/common/cputable.c
   3  *
   4  *  Copyright (C) 2004 Dan Malek (dan@embeddededge.com)
   5  *      Copied from PowerPC and updated for Alchemy Au1xxx processors.
   6  *
   7  *  Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
   8  *
   9  *  This program is free software; you can redistribute it and/or
  10  *  modify it under the terms of the GNU General Public License
  11  *  as published by the Free Software Foundation; either version
  12  *  2 of the License, or (at your option) any later version.
  13  */
  14 #include <linux/string.h>
  15 #include <linux/sched.h>
  16 #include <linux/threads.h>
  17 #include <linux/init.h>
  18 #include <asm/mach-au1x00/au1000.h>
  19
  20 struct cpu_spec* cur_cpu_spec[NR_CPUS];
  21
  22 /* With some thought, we can probably use the mask to reduce the
  23  * size of the table.
  24  */
  25 struct cpu_spec cpu_specs[] = {
  26     { 0xffffffff, 0x00030100, "Au1000 DA", 1, 0 },
  27     { 0xffffffff, 0x00030201, "Au1000 HA", 1, 0 },
  28     { 0xffffffff, 0x00030202, "Au1000 HB", 1, 0 },
  29     { 0xffffffff, 0x00030203, "Au1000 HC", 1, 1 },
  30     { 0xffffffff, 0x00030204, "Au1000 HD", 1, 1 },
  31     { 0xffffffff, 0x01030200, "Au1500 AB", 1, 1 },
  32     { 0xffffffff, 0x01030201, "Au1500 AC", 0, 1 },
  33     { 0xffffffff, 0x01030202, "Au1500 AD", 0, 1 },
  34     { 0xffffffff, 0x02030200, "Au1100 AB", 1, 1 },
  35     { 0xffffffff, 0x02030201, "Au1100 BA", 1, 1 },
  36     { 0xffffffff, 0x02030202, "Au1100 BC", 1, 1 },
  37     { 0xffffffff, 0x02030203, "Au1100 BD", 0, 1 },
  38     { 0xffffffff, 0x02030204, "Au1100 BE", 0, 1 },
  39     { 0xffffffff, 0x03030200, "Au1550 AA", 0, 1 },
  40     { 0xffffffff, 0x04030200, "Au1200 AB", 0, 0 },
  41     { 0xffffffff, 0x04030201, "Au1200 AC", 1, 0 },
  42     { 0x00000000, 0x00000000, "Unknown Au1xxx", 1, 0 },
  43 };
  44
  45 void
  46 set_cpuspec(void)
  47 {
  48         struct  cpu_spec *sp;
  49         u32     prid;
  50
  51         prid = read_c0_prid();
  52         sp = cpu_specs;
  53         while ((prid & sp->prid_mask) != sp->prid_value)
  54                 sp++;
  55         cur_cpu_spec[0] = sp;
  56 }