arch/microblaze/kernel/cpu/cpuinfo.c

   1 /*
   2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   3  * Copyright (C) 2007-2009 PetaLogix
   4  * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License. See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <asm/cpuinfo.h>
  13 #include <asm/pvr.h>
  14
  15 const struct cpu_ver_key cpu_ver_lookup[] = {
  16         /* These key value are as per MBV field in PVR0 */
  17         {"5.00.a", 0x01},
  18         {"5.00.b", 0x02},
  19         {"5.00.c", 0x03},
  20         {"6.00.a", 0x04},
  21         {"6.00.b", 0x06},
  22         {"7.00.a", 0x05},
  23         {"7.00.b", 0x07},
  24         {"7.10.a", 0x08},
  25         {"7.10.b", 0x09},
  26         {"7.10.c", 0x0a},
  27         {"7.10.d", 0x0b},
  28         {"7.20.a", 0x0c},
  29         {"7.20.b", 0x0d},
  30         {"7.20.c", 0x0e},
  31         {"7.20.d", 0x0f},
  32         {"7.30.a", 0x10},
  33         {"7.30.b", 0x11},
  34         {"8.00.a", 0x12},
  35         {"8.00.b", 0x13},
  36         {"8.10.a", 0x14},
  37         {NULL, 0},
  38 };
  39
  40 /*
  41  * FIXME Not sure if the actual key is defined by Xilinx in the PVR
  42  */
  43 const struct family_string_key family_string_lookup[] = {
  44         {"virtex2", 0x4},
  45         {"virtex2pro", 0x5},
  46         {"spartan3", 0x6},
  47         {"virtex4", 0x7},
  48         {"virtex5", 0x8},
  49         {"spartan3e", 0x9},
  50         {"spartan3a", 0xa},
  51         {"spartan3an", 0xb},
  52         {"spartan3adsp", 0xc},
  53         {"spartan6", 0xd},
  54         {"virtex6", 0xe},
  55         /* FIXME There is no key code defined for spartan2 */
  56         {"spartan2", 0xf0},
  57         {NULL, 0},
  58 };
  59
  60 struct cpuinfo cpuinfo;
  61
  62 void __init setup_cpuinfo(void)
  63 {
  64         struct device_node *cpu = NULL;
  65
  66         cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
  67         if (!cpu)
  68                 printk(KERN_ERR "You don't have cpu!!!\n");
  69
  70         printk(KERN_INFO "%s: initialising\n", __func__);
  71
  72         switch (cpu_has_pvr()) {
  73         case 0:
  74                 printk(KERN_WARNING
  75                         "%s: No PVR support. Using static CPU info from FDT\n",
  76                         __func__);
  77                 set_cpuinfo_static(&cpuinfo, cpu);
  78                 break;
  79 /* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
  80  * please do not use FULL PVR with MMU */
  81         case 1:
  82                 printk(KERN_INFO "%s: Using full CPU PVR support\n",
  83                         __func__);
  84                 set_cpuinfo_static(&cpuinfo, cpu);
  85                 set_cpuinfo_pvr_full(&cpuinfo, cpu);
  86                 break;
  87         default:
  88                 printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__);
  89                 set_cpuinfo_static(&cpuinfo, cpu);
  90         }
  91
  92         if (cpuinfo.mmu_privins)
  93                 printk(KERN_WARNING "%s: Stream instructions enabled"
  94                         " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
  95 }