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setup.c

/*
 * 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.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/reboot.h>
#include <asm/cacheflush.h>
#include <bcm63xx_board.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_regs.h>
#include <bcm63xx_io.h>

void bcm63xx_machine_halt(void)
{
      printk(KERN_INFO "System halted\n");
      while (1)
            ;
}

static void bcm6348_a1_reboot(void)
{
      u32 reg;

      /* soft reset all blocks */
      printk(KERN_INFO "soft-reseting all blocks ...\n");
      reg = bcm_perf_readl(PERF_SOFTRESET_REG);
      reg &= ~SOFTRESET_6348_ALL;
      bcm_perf_writel(reg, PERF_SOFTRESET_REG);
      mdelay(10);

      reg = bcm_perf_readl(PERF_SOFTRESET_REG);
      reg |= SOFTRESET_6348_ALL;
      bcm_perf_writel(reg, PERF_SOFTRESET_REG);
      mdelay(10);

      /* Jump to the power on address. */
      printk(KERN_INFO "jumping to reset vector.\n");
      /* set high vectors (base at 0xbfc00000 */
      set_c0_status(ST0_BEV | ST0_ERL);
      /* run uncached in kseg0 */
      change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
      __flush_cache_all();
      /* remove all wired TLB entries */
      write_c0_wired(0);
      __asm__ __volatile__(
            "jr\t%0"
            :
            : "r" (0xbfc00000));
      while (1)
            ;
}

void bcm63xx_machine_reboot(void)
{
      u32 reg;

      /* mask and clear all external irq */
      reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
      reg &= ~EXTIRQ_CFG_MASK_ALL;
      reg |= EXTIRQ_CFG_CLEAR_ALL;
      bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);

      if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
            bcm6348_a1_reboot();

      printk(KERN_INFO "triggering watchdog soft-reset...\n");
      reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
      reg |= SYS_PLL_SOFT_RESET;
      bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
      while (1)
            ;
}

static void __bcm63xx_machine_reboot(char *p)
{
      bcm63xx_machine_reboot();
}

/*
 * return system type in /proc/cpuinfo
 */
const char *get_system_type(void)
{
      static char buf[128];
      snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%04X)",
             board_get_name(),
             bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
      return buf;
}

void __init plat_time_init(void)
{
      mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
}

void __init plat_mem_setup(void)
{
      add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);

      _machine_halt = bcm63xx_machine_halt;
      _machine_restart = __bcm63xx_machine_reboot;
      pm_power_off = bcm63xx_machine_halt;

      set_io_port_base(0);
      ioport_resource.start = 0;
      ioport_resource.end = ~0;

      board_setup();
}

int __init bcm63xx_register_devices(void)
{
      return board_register_devices();
}

arch_initcall(bcm63xx_register_devices);

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