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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License as published by the
4 * Free Software Foundation; either version 2 of the License, or (at your
5 * option) any later version.
6 *
7 * Copyright (C) 2003, 2004 PMC-Sierra Inc.
8 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
9 * Copyright (C) 2004 Ralf Baechle
10 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/init.h>
12#include <linux/sched.h>
13#include <linux/mm.h>
14#include <linux/delay.h>
Ralf Baechlefcdb27a2006-01-18 17:37:07 +000015#include <linux/pm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/smp.h>
17
18#include <asm/io.h>
19#include <asm/pgtable.h>
20#include <asm/processor.h>
21#include <asm/reboot.h>
Ralf Baechle87353d82007-11-19 12:23:51 +000022#include <asm/smp-ops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <asm/system.h>
24#include <asm/bootinfo.h>
25#include <asm/pmon.h>
26
27#ifdef CONFIG_SMP
28extern void prom_grab_secondary(void);
29#else
30#define prom_grab_secondary() do { } while (0)
31#endif
32
33#include "setup.h"
34
35struct callvectors *debug_vectors;
36
37extern unsigned long yosemite_base;
Ralf Baechle348c9132007-07-28 11:46:15 +010038extern unsigned long cpu_clock_freq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40const char *get_system_type(void)
41{
42 return "PMC-Sierra Yosemite";
43}
44
45static void prom_cpu0_exit(void *arg)
46{
47 void *nvram = (void *) YOSEMITE_RTC_BASE;
48
49 /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
50 writeb(0x84, nvram + 0xff7);
51
52 /* wait for the watchdog to go off */
53 mdelay(100 + (1000 / 16));
54
55 /* if the watchdog fails for some reason, let people know */
56 printk(KERN_NOTICE "Watchdog reset failed\n");
57}
58
59/*
60 * Reset the NVRAM over the local bus
61 */
62static void prom_exit(void)
63{
64#ifdef CONFIG_SMP
65 if (smp_processor_id())
66 /* CPU 1 */
Jens Axboe8691e5a2008-06-06 11:18:06 +020067 smp_call_function(prom_cpu0_exit, NULL, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#endif
69 prom_cpu0_exit(NULL);
70}
71
72/*
73 * Halt the system
74 */
75static void prom_halt(void)
76{
77 printk(KERN_NOTICE "\n** You can safely turn off the power\n");
78 while (1)
79 __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
80}
81
Ralf Baechle87353d82007-11-19 12:23:51 +000082extern struct plat_smp_ops yos_smp_ops;
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/*
85 * Init routine which accepts the variables from PMON
86 */
87void __init prom_init(void)
88{
89 int argc = fw_arg0;
90 char **arg = (char **) fw_arg1;
91 char **env = (char **) fw_arg2;
92 struct callvectors *cv = (struct callvectors *) fw_arg3;
93 int i = 0;
94
95 /* Callbacks for halt, restart */
96 _machine_restart = (void (*)(char *)) prom_exit;
97 _machine_halt = prom_halt;
Ralf Baechlefcdb27a2006-01-18 17:37:07 +000098 pm_power_off = prom_halt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 debug_vectors = cv;
101 arcs_cmdline[0] = '\0';
102
103 /* Get the boot parameters */
104 for (i = 1; i < argc; i++) {
105 if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >=
106 sizeof(arcs_cmdline))
107 break;
108
109 strcat(arcs_cmdline, arg[i]);
110 strcat(arcs_cmdline, " ");
111 }
112
113#ifdef CONFIG_SERIAL_8250_CONSOLE
114 if ((strstr(arcs_cmdline, "console=ttyS")) == NULL)
115 strcat(arcs_cmdline, "console=ttyS0,115200");
116#endif
117
118 while (*env) {
119 if (strncmp("ocd_base", *env, strlen("ocd_base")) == 0)
120 yosemite_base =
121 simple_strtol(*env + strlen("ocd_base="), NULL,
122 16);
123
124 if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0)
Ralf Baechle348c9132007-07-28 11:46:15 +0100125 cpu_clock_freq =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 simple_strtol(*env + strlen("cpuclock="), NULL,
127 10);
128
129 env++;
130 }
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 prom_grab_secondary();
Ralf Baechle87353d82007-11-19 12:23:51 +0000133
134 register_smp_ops(&yos_smp_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135}
136
Atsushi Nemotoc44e8d52006-12-30 00:43:59 +0900137void __init prom_free_prom_memory(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139}
140
141void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
142{
143}