Logo Search packages:      
Sourcecode: linux version File versions

prom.c

/*
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 * Copyright (C) 2003, 2004 PMC-Sierra Inc.
 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
 * Copyright (C) 2004 Ralf Baechle
 */
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/smp.h>

#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/smp-ops.h>
#include <asm/system.h>
#include <asm/bootinfo.h>
#include <asm/pmon.h>

#ifdef CONFIG_SMP
extern void prom_grab_secondary(void);
#else
#define prom_grab_secondary() do { } while (0)
#endif

#include "setup.h"

struct callvectors *debug_vectors;

extern unsigned long yosemite_base;
extern unsigned long cpu_clock_freq;

const char *get_system_type(void)
{
      return "PMC-Sierra Yosemite";
}

static void prom_cpu0_exit(void *arg)
{
      void *nvram = (void *) YOSEMITE_RTC_BASE;

      /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
      writeb(0x84, nvram + 0xff7);

      /* wait for the watchdog to go off */
      mdelay(100 + (1000 / 16));

      /* if the watchdog fails for some reason, let people know */
      printk(KERN_NOTICE "Watchdog reset failed\n");
}

/*
 * Reset the NVRAM over the local bus
 */
static void prom_exit(void)
{
#ifdef CONFIG_SMP
      if (smp_processor_id())
            /* CPU 1 */
            smp_call_function(prom_cpu0_exit, NULL, 1);
#endif
      prom_cpu0_exit(NULL);
}

/*
 * Halt the system
 */
static void prom_halt(void)
{
      printk(KERN_NOTICE "\n** You can safely turn off the power\n");
      while (1)
            __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
}

extern struct plat_smp_ops yos_smp_ops;

/*
 * Init routine which accepts the variables from PMON
 */
void __init prom_init(void)
{
      int argc = fw_arg0;
      char **arg = (char **) fw_arg1;
      char **env = (char **) fw_arg2;
      struct callvectors *cv = (struct callvectors *) fw_arg3;
      int i = 0;

      /* Callbacks for halt, restart */
      _machine_restart = (void (*)(char *)) prom_exit;
      _machine_halt = prom_halt;
      pm_power_off = prom_halt;

      debug_vectors = cv;
      arcs_cmdline[0] = '\0';

      /* Get the boot parameters */
      for (i = 1; i < argc; i++) {
            if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >=
                sizeof(arcs_cmdline))
                  break;

            strcat(arcs_cmdline, arg[i]);
            strcat(arcs_cmdline, " ");
      }

#ifdef CONFIG_SERIAL_8250_CONSOLE
      if ((strstr(arcs_cmdline, "console=ttyS")) == NULL)
            strcat(arcs_cmdline, "console=ttyS0,115200");
#endif

      while (*env) {
            if (strncmp("ocd_base", *env, strlen("ocd_base")) == 0)
                  yosemite_base =
                      simple_strtol(*env + strlen("ocd_base="), NULL,
                                16);

            if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0)
                  cpu_clock_freq =
                      simple_strtol(*env + strlen("cpuclock="), NULL,
                                10);

            env++;
      }

      prom_grab_secondary();

      register_smp_ops(&yos_smp_ops);
}

void __init prom_free_prom_memory(void)
{
}

void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
{
}

Generated by  Doxygen 1.6.0   Back to index