LXR linux/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
  15const 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        {"8.20.a", 0x15},
  38        {"8.20.b", 0x16},
  39        {"8.30.a", 0x17},
  40        {NULL, 0},
  41};
  42
  43/*
  44 * FIXME Not sure if the actual key is defined by Xilinx in the PVR
  45 */
  46const struct family_string_key family_string_lookup[] = {
  47        {"virtex2", 0x4},
  48        {"virtex2pro", 0x5},
  49        {"spartan3", 0x6},
  50        {"virtex4", 0x7},
  51        {"virtex5", 0x8},
  52        {"spartan3e", 0x9},
  53        {"spartan3a", 0xa},
  54        {"spartan3an", 0xb},
  55        {"spartan3adsp", 0xc},
  56        {"spartan6", 0xd},
  57        {"virtex6", 0xe},
  58        /* FIXME There is no key code defined for spartan2 */
  59        {"spartan2", 0xf0},
  60        {NULL, 0},
  61};
  62
  63struct cpuinfo cpuinfo;
  64
  65void __init setup_cpuinfo(void)
  66{
  67        struct device_node *cpu = NULL;
  68
  69        cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
  70        if (!cpu)
  71                printk(KERN_ERR "You don't have cpu!!!\n");
  72
  73        printk(KERN_INFO "%s: initialising\n", __func__);
  74
  75        switch (cpu_has_pvr()) {
  76        case 0:
  77                printk(KERN_WARNING
  78                        "%s: No PVR support. Using static CPU info from FDT\n",
  79                        __func__);
  80                set_cpuinfo_static(&cpuinfo, cpu);
  81                break;
  82/* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
  83 * please do not use FULL PVR with MMU */
  84        case 1:
  85                printk(KERN_INFO "%s: Using full CPU PVR support\n",
  86                        __func__);
  87                set_cpuinfo_static(&cpuinfo, cpu);
  88                set_cpuinfo_pvr_full(&cpuinfo, cpu);
  89                break;
  90        default:
  91                printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__);
  92                set_cpuinfo_static(&cpuinfo, cpu);
  93        }
  94
  95        if (cpuinfo.mmu_privins)
  96                printk(KERN_WARNING "%s: Stream instructions enabled"
  97                        " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
  98}
  99