143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Copyright (C) 2003, 2004 PMC-Sierra Inc.
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* Author: Manish Lachwani (lachwani@pmc-sierra.com)
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* Copyright (C) 2004 Ralf Baechle
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/smp.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/reboot.h>
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#include <asm/smp-ops.h>
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#include <asm/system.h>
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#include <asm/bootinfo.h>
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#include <asm/pmon.h>
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#ifdef CONFIG_SMP
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extern void prom_grab_secondary(void);
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#else
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#define prom_grab_secondary() do { } while (0)
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#endif
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#include "setup.h"
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struct callvectors *debug_vectors;
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extern unsigned long yosemite_base;
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extern unsigned long cpu_clock_freq;
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const char *get_system_type(void)
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{
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return "PMC-Sierra Yosemite";
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}
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static void prom_cpu0_exit(void *arg)
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{
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void *nvram = (void *) YOSEMITE_RTC_BASE;
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/* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
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writeb(0x84, nvram + 0xff7);
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/* wait for the watchdog to go off */
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mdelay(100 + (1000 / 16));
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/* if the watchdog fails for some reason, let people know */
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printk(KERN_NOTICE "Watchdog reset failed\n");
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}
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/*
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* Reset the NVRAM over the local bus
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*/
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static void prom_exit(void)
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{
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#ifdef CONFIG_SMP
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if (smp_processor_id())
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/* CPU 1 */
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smp_call_function(prom_cpu0_exit, NULL, 1, 1);
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#endif
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prom_cpu0_exit(NULL);
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}
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/*
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* Halt the system
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*/
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static void prom_halt(void)
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{
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printk(KERN_NOTICE "\n** You can safely turn off the power\n");
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while (1)
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__asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
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}
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extern struct plat_smp_ops yos_smp_ops;
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/*
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* Init routine which accepts the variables from PMON
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*/
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void __init prom_init(void)
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{
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int argc = fw_arg0;
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char **arg = (char **) fw_arg1;
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char **env = (char **) fw_arg2;
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struct callvectors *cv = (struct callvectors *) fw_arg3;
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int i = 0;
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/* Callbacks for halt, restart */
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_machine_restart = (void (*)(char *)) prom_exit;
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_machine_halt = prom_halt;
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pm_power_off = prom_halt;
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debug_vectors = cv;
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arcs_cmdline[0] = '\0';
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/* Get the boot parameters */
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for (i = 1; i < argc; i++) {
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if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >=
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sizeof(arcs_cmdline))
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break;
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strcat(arcs_cmdline, arg[i]);
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strcat(arcs_cmdline, " ");
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}
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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if ((strstr(arcs_cmdline, "console=ttyS")) == NULL)
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strcat(arcs_cmdline, "console=ttyS0,115200");
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#endif
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while (*env) {
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if (strncmp("ocd_base", *env, strlen("ocd_base")) == 0)
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yosemite_base =
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simple_strtol(*env + strlen("ocd_base="), NULL,
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16);
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if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0)
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cpu_clock_freq =
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simple_strtol(*env + strlen("cpuclock="), NULL,
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10);
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env++;
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}
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prom_grab_secondary();
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register_smp_ops(&yos_smp_ops);
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}
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void __init prom_free_prom_memory(void)
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{
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}
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void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
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{
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}
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