cpuinfo.c

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/*
 * Copyright (C) 2007-2009 Michal Simek <[email protected]>
 * Copyright (C) 2007-2009 PetaLogix
 * Copyright (C) 2007 John Williams <[email protected]>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/init.h>
#include <asm/cpuinfo.h>
#include <asm/pvr.h>

const struct cpu_ver_key cpu_ver_lookup[] = {
    /* These key value are as per MBV field in PVR0 */
    {"5.00.a", 0x01},
    {"5.00.b", 0x02},
    {"5.00.c", 0x03},
    {"6.00.a", 0x04},
    {"6.00.b", 0x06},
    {"7.00.a", 0x05},
    {"7.00.b", 0x07},
    {"7.10.a", 0x08},
    {"7.10.b", 0x09},
    {"7.10.c", 0x0a},
    {"7.10.d", 0x0b},
    {"7.20.a", 0x0c},
    {"7.20.b", 0x0d},
    {"7.20.c", 0x0e},
    {"7.20.d", 0x0f},
    {"7.30.a", 0x10},
    {"7.30.b", 0x11},
    {"8.00.a", 0x12},
    {"8.00.b", 0x13},
    {"8.10.a", 0x14},
    {"8.20.a", 0x15},
    {"8.20.b", 0x16},
    {"8.30.a", 0x17},
    {NULL, 0},
};

/*
 * FIXME Not sure if the actual key is defined by Xilinx in the PVR
 */
const struct family_string_key family_string_lookup[] = {
    {"virtex2", 0x4},
    {"virtex2pro", 0x5},
    {"spartan3", 0x6},
    {"virtex4", 0x7},
    {"virtex5", 0x8},
    {"spartan3e", 0x9},
    {"spartan3a", 0xa},
    {"spartan3an", 0xb},
    {"spartan3adsp", 0xc},
    {"spartan6", 0xd},
    {"virtex6", 0xe},
    /* FIXME There is no key code defined for spartan2 */
    {"spartan2", 0xf0},
    {NULL, 0},
};

struct cpuinfo cpuinfo;

void __init setup_cpuinfo(void)
{
    struct device_node *cpu = NULL;

    cpu = (struct device_node *) of_find_node_by_type(NULL, "cpu");
    if (!cpu)
        printk(KERN_ERR "You don't have cpu!!!\n");

    printk(KERN_INFO "%s: initialising\n", __func__);

    switch (cpu_has_pvr()) {
    case 0:
        printk(KERN_WARNING
            "%s: No PVR support. Using static CPU info from FDT\n",
            __func__);
        set_cpuinfo_static(&cpuinfo, cpu);
        break;
/* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
 * please do not use FULL PVR with MMU */
    case 1:
        printk(KERN_INFO "%s: Using full CPU PVR support\n",
            __func__);
        set_cpuinfo_static(&cpuinfo, cpu);
        set_cpuinfo_pvr_full(&cpuinfo, cpu);
        break;
    default:
        printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__);
        set_cpuinfo_static(&cpuinfo, cpu);
    }

    if (cpuinfo.mmu_privins)
        printk(KERN_WARNING "%s: Stream instructions enabled"
            " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);
}