1 /*
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 */
11 #include <linux/init.h>
12 #include <linux/sched.h>
13 #include <linux/mm.h>
14 #include <linux/delay.h>
15 #include <linux/pm.h>
16 #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>
22 #include <asm/smp-ops.h>
23 #include <asm/system.h>
24 #include <asm/bootinfo.h>
25 #include <asm/pmon.h>
26
27 #ifdef CONFIG_SMP
28 extern void prom_grab_secondary(void);
29 #else
30 #define prom_grab_secondary() do { } while (0)
31 #endif
32
33 #include "setup.h"
34
35 struct callvectors *debug_vectors;
36
37 extern unsigned long yosemite_base;
38 extern unsigned long cpu_clock_freq;
39
get_system_type(void)40 const char *get_system_type(void)
41 {
42 return "PMC-Sierra Yosemite";
43 }
44
prom_cpu0_exit(void * arg)45 static 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 */
prom_exit(void)62 static void prom_exit(void)
63 {
64 #ifdef CONFIG_SMP
65 if (smp_processor_id())
66 /* CPU 1 */
67 smp_call_function(prom_cpu0_exit, NULL, 1);
68 #endif
69 prom_cpu0_exit(NULL);
70 }
71
72 /*
73 * Halt the system
74 */
prom_halt(void)75 static 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
82 extern struct plat_smp_ops yos_smp_ops;
83
84 /*
85 * Init routine which accepts the variables from PMON
86 */
prom_init(void)87 void __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;
98 pm_power_off = prom_halt;
99
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)
125 cpu_clock_freq =
126 simple_strtol(*env + strlen("cpuclock="), NULL,
127 10);
128
129 env++;
130 }
131
132 prom_grab_secondary();
133
134 register_smp_ops(&yos_smp_ops);
135 }
136
prom_free_prom_memory(void)137 void __init prom_free_prom_memory(void)
138 {
139 }
140
prom_fixup_mem_map(unsigned long start,unsigned long end)141 void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
142 {
143 }
144