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1da177e4 LT |
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 | */ | |
1da177e4 LT |
11 | #include <linux/init.h> |
12 | #include <linux/sched.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/delay.h> | |
fcdb27ad | 15 | #include <linux/pm.h> |
1da177e4 LT |
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/system.h> | |
23 | #include <asm/bootinfo.h> | |
24 | #include <asm/pmon.h> | |
25 | ||
26 | #ifdef CONFIG_SMP | |
27 | extern void prom_grab_secondary(void); | |
28 | #else | |
29 | #define prom_grab_secondary() do { } while (0) | |
30 | #endif | |
31 | ||
32 | #include "setup.h" | |
33 | ||
34 | struct callvectors *debug_vectors; | |
35 | ||
36 | extern unsigned long yosemite_base; | |
348c913f | 37 | extern unsigned long cpu_clock_freq; |
1da177e4 LT |
38 | |
39 | const char *get_system_type(void) | |
40 | { | |
41 | return "PMC-Sierra Yosemite"; | |
42 | } | |
43 | ||
44 | static void prom_cpu0_exit(void *arg) | |
45 | { | |
46 | void *nvram = (void *) YOSEMITE_RTC_BASE; | |
47 | ||
48 | /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */ | |
49 | writeb(0x84, nvram + 0xff7); | |
50 | ||
51 | /* wait for the watchdog to go off */ | |
52 | mdelay(100 + (1000 / 16)); | |
53 | ||
54 | /* if the watchdog fails for some reason, let people know */ | |
55 | printk(KERN_NOTICE "Watchdog reset failed\n"); | |
56 | } | |
57 | ||
58 | /* | |
59 | * Reset the NVRAM over the local bus | |
60 | */ | |
61 | static void prom_exit(void) | |
62 | { | |
63 | #ifdef CONFIG_SMP | |
64 | if (smp_processor_id()) | |
65 | /* CPU 1 */ | |
66 | smp_call_function(prom_cpu0_exit, NULL, 1, 1); | |
67 | #endif | |
68 | prom_cpu0_exit(NULL); | |
69 | } | |
70 | ||
71 | /* | |
72 | * Halt the system | |
73 | */ | |
74 | static void prom_halt(void) | |
75 | { | |
76 | printk(KERN_NOTICE "\n** You can safely turn off the power\n"); | |
77 | while (1) | |
78 | __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0"); | |
79 | } | |
80 | ||
81 | /* | |
82 | * Init routine which accepts the variables from PMON | |
83 | */ | |
84 | void __init prom_init(void) | |
85 | { | |
86 | int argc = fw_arg0; | |
87 | char **arg = (char **) fw_arg1; | |
88 | char **env = (char **) fw_arg2; | |
89 | struct callvectors *cv = (struct callvectors *) fw_arg3; | |
90 | int i = 0; | |
91 | ||
92 | /* Callbacks for halt, restart */ | |
93 | _machine_restart = (void (*)(char *)) prom_exit; | |
94 | _machine_halt = prom_halt; | |
fcdb27ad | 95 | pm_power_off = prom_halt; |
1da177e4 LT |
96 | |
97 | debug_vectors = cv; | |
98 | arcs_cmdline[0] = '\0'; | |
99 | ||
100 | /* Get the boot parameters */ | |
101 | for (i = 1; i < argc; i++) { | |
102 | if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >= | |
103 | sizeof(arcs_cmdline)) | |
104 | break; | |
105 | ||
106 | strcat(arcs_cmdline, arg[i]); | |
107 | strcat(arcs_cmdline, " "); | |
108 | } | |
109 | ||
110 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
111 | if ((strstr(arcs_cmdline, "console=ttyS")) == NULL) | |
112 | strcat(arcs_cmdline, "console=ttyS0,115200"); | |
113 | #endif | |
114 | ||
115 | while (*env) { | |
116 | if (strncmp("ocd_base", *env, strlen("ocd_base")) == 0) | |
117 | yosemite_base = | |
118 | simple_strtol(*env + strlen("ocd_base="), NULL, | |
119 | 16); | |
120 | ||
121 | if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) | |
348c913f | 122 | cpu_clock_freq = |
1da177e4 LT |
123 | simple_strtol(*env + strlen("cpuclock="), NULL, |
124 | 10); | |
125 | ||
126 | env++; | |
127 | } | |
128 | ||
1da177e4 LT |
129 | mips_machtype = MACH_TITAN_YOSEMITE; |
130 | ||
131 | prom_grab_secondary(); | |
132 | } | |
133 | ||
c44e8d5e | 134 | void __init prom_free_prom_memory(void) |
1da177e4 LT |
135 | { |
136 | } | |
137 | ||
138 | void __init prom_fixup_mem_map(unsigned long start, unsigned long end) | |
139 | { | |
140 | } |