setup.c

Go to the documentation of this file.

/*
 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
 * reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the NetLogic
 * license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/serial_8250.h>
#include <linux/pm.h>

#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/bootinfo.h>

#include <asm/netlogic/interrupt.h>
#include <asm/netlogic/psb-bootinfo.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/common.h>

#include <asm/netlogic/xlr/xlr.h>
#include <asm/netlogic/xlr/iomap.h>
#include <asm/netlogic/xlr/pic.h>
#include <asm/netlogic/xlr/gpio.h>

uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
uint64_t nlm_pic_base;
struct psb_info nlm_prom_info;

unsigned long nlm_common_ebase = 0x0;

/* default to uniprocessor */
uint32_t nlm_coremask = 1, nlm_cpumask  = 1;
int  nlm_threads_per_core = 1;

static void __init nlm_early_serial_setup(void)
{
    struct uart_port s;
    unsigned long uart_base;

    uart_base = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
    memset(&s, 0, sizeof(s));
    s.flags     = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
    s.iotype    = UPIO_MEM32;
    s.regshift  = 2;
    s.irq       = PIC_UART_0_IRQ;
    s.uartclk   = PIC_CLKS_PER_SEC;
    s.serial_in = nlm_xlr_uart_in;
    s.serial_out    = nlm_xlr_uart_out;
    s.mapbase   = uart_base;
    s.membase   = (unsigned char __iomem *)uart_base;
    early_serial_setup(&s);
}

static void nlm_linux_exit(void)
{
    uint64_t gpiobase;

    gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
    /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
    nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
    for ( ; ; )
        cpu_wait();
}

void __init plat_mem_setup(void)
{
    panic_timeout   = 5;
    _machine_restart = (void (*)(char *))nlm_linux_exit;
    _machine_halt   = nlm_linux_exit;
    pm_power_off    = nlm_linux_exit;
}

const char *get_system_type(void)
{
    return "Netlogic XLR/XLS Series";
}

unsigned int nlm_get_cpu_frequency(void)
{
    return (unsigned int)nlm_prom_info.cpu_frequency;
}

void __init prom_free_prom_memory(void)
{
    /* Nothing yet */
}

static void __init build_arcs_cmdline(int *argv)
{
    int i, remain, len;
    char *arg;

    remain = sizeof(arcs_cmdline) - 1;
    arcs_cmdline[0] = '\0';
    for (i = 0; argv[i] != 0; i++) {
        arg = (char *)(long)argv[i];
        len = strlen(arg);
        if (len + 1 > remain)
            break;
        strcat(arcs_cmdline, arg);
        strcat(arcs_cmdline, " ");
        remain -=  len + 1;
    }

    /* Add the default options here */
    if ((strstr(arcs_cmdline, "console=")) == NULL) {
        arg = "console=ttyS0,38400 ";
        len = strlen(arg);
        if (len > remain)
            goto fail;
        strcat(arcs_cmdline, arg);
        remain -= len;
    }
#ifdef CONFIG_BLK_DEV_INITRD
    if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
        arg = "rdinit=/sbin/init ";
        len = strlen(arg);
        if (len > remain)
            goto fail;
        strcat(arcs_cmdline, arg);
        remain -= len;
    }
#endif
    return;
fail:
    panic("Cannot add %s, command line too big!", arg);
}

static void prom_add_memory(void)
{
    struct nlm_boot_mem_map *bootm;
    u64 start, size;
    u64 pref_backup = 512;  /* avoid pref walking beyond end */
    int i;

    bootm = (void *)(long)nlm_prom_info.psb_mem_map;
    for (i = 0; i < bootm->nr_map; i++) {
        if (bootm->map[i].type != BOOT_MEM_RAM)
            continue;
        start = bootm->map[i].addr;
        size   = bootm->map[i].size;

        /* Work around for using bootloader mem */
        if (i == 0 && start == 0 && size == 0x0c000000)
            size = 0x0ff00000;

        add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
    }
}

void __init prom_init(void)
{
    int *argv, *envp;       /* passed as 32 bit ptrs */
    struct psb_info *prom_infop;

    /* truncate to 32 bit and sign extend all args */
    argv = (int *)(long)(int)fw_arg1;
    envp = (int *)(long)(int)fw_arg2;
    prom_infop = (struct psb_info *)(long)(int)fw_arg3;

    nlm_prom_info = *prom_infop;
    nlm_pic_base = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);

    nlm_early_serial_setup();
    build_arcs_cmdline(argv);
    nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
    prom_add_memory();

#ifdef CONFIG_SMP
    nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
    register_smp_ops(&nlm_smp_ops);
#endif
}