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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * init.c: PROM library initialisation code. | |
3 | * | |
4 | * Copyright (C) 1998 Harald Koerfgen | |
5 | * Copyright (C) 2002, 2004 Maciej W. Rozycki | |
6 | */ | |
1da177e4 | 7 | #include <linux/init.h> |
8a185d14 MR |
8 | #include <linux/kernel.h> |
9 | #include <linux/linkage.h> | |
1da177e4 LT |
10 | #include <linux/smp.h> |
11 | #include <linux/string.h> | |
12 | #include <linux/types.h> | |
13 | ||
14 | #include <asm/bootinfo.h> | |
15 | #include <asm/cpu.h> | |
69f24d17 | 16 | #include <asm/cpu-type.h> |
1da177e4 LT |
17 | #include <asm/processor.h> |
18 | ||
19 | #include <asm/dec/prom.h> | |
20 | ||
21 | ||
22 | int (*__rex_bootinit)(void); | |
23 | int (*__rex_bootread)(void); | |
24 | int (*__rex_getbitmap)(memmap *); | |
25 | unsigned long *(*__rex_slot_address)(int); | |
26 | void *(*__rex_gettcinfo)(void); | |
27 | int (*__rex_getsysid)(void); | |
28 | void (*__rex_clear_cache)(void); | |
29 | ||
30 | int (*__prom_getchar)(void); | |
31 | char *(*__prom_getenv)(char *); | |
32 | int (*__prom_printf)(char *, ...); | |
33 | ||
34 | int (*__pmax_open)(char*, int); | |
35 | int (*__pmax_lseek)(int, long, int); | |
36 | int (*__pmax_read)(int, void *, int); | |
37 | int (*__pmax_close)(int); | |
38 | ||
39 | ||
40 | /* | |
41 | * Detect which PROM the DECSTATION has, and set the callback vectors | |
42 | * appropriately. | |
43 | */ | |
44 | void __init which_prom(s32 magic, s32 *prom_vec) | |
45 | { | |
46 | /* | |
47 | * No sign of the REX PROM's magic number means we assume a non-REX | |
48 | * machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx) | |
49 | */ | |
50 | if (prom_is_rex(magic)) { | |
51 | /* | |
52 | * Set up prom abstraction structure with REX entry points. | |
53 | */ | |
54 | __rex_bootinit = | |
55 | (void *)(long)*(prom_vec + REX_PROM_BOOTINIT); | |
56 | __rex_bootread = | |
57 | (void *)(long)*(prom_vec + REX_PROM_BOOTREAD); | |
58 | __rex_getbitmap = | |
59 | (void *)(long)*(prom_vec + REX_PROM_GETBITMAP); | |
60 | __prom_getchar = | |
61 | (void *)(long)*(prom_vec + REX_PROM_GETCHAR); | |
62 | __prom_getenv = | |
63 | (void *)(long)*(prom_vec + REX_PROM_GETENV); | |
64 | __rex_getsysid = | |
65 | (void *)(long)*(prom_vec + REX_PROM_GETSYSID); | |
66 | __rex_gettcinfo = | |
67 | (void *)(long)*(prom_vec + REX_PROM_GETTCINFO); | |
68 | __prom_printf = | |
69 | (void *)(long)*(prom_vec + REX_PROM_PRINTF); | |
70 | __rex_slot_address = | |
71 | (void *)(long)*(prom_vec + REX_PROM_SLOTADDR); | |
72 | __rex_clear_cache = | |
73 | (void *)(long)*(prom_vec + REX_PROM_CLEARCACHE); | |
74 | } else { | |
75 | /* | |
76 | * Set up prom abstraction structure with non-REX entry points. | |
77 | */ | |
78 | __prom_getchar = (void *)PMAX_PROM_GETCHAR; | |
79 | __prom_getenv = (void *)PMAX_PROM_GETENV; | |
80 | __prom_printf = (void *)PMAX_PROM_PRINTF; | |
81 | __pmax_open = (void *)PMAX_PROM_OPEN; | |
82 | __pmax_lseek = (void *)PMAX_PROM_LSEEK; | |
83 | __pmax_read = (void *)PMAX_PROM_READ; | |
84 | __pmax_close = (void *)PMAX_PROM_CLOSE; | |
85 | } | |
86 | } | |
87 | ||
88 | void __init prom_init(void) | |
89 | { | |
b3f6df9f | 90 | extern void dec_machine_halt(void); |
1da177e4 LT |
91 | static char cpu_msg[] __initdata = |
92 | "Sorry, this kernel is compiled for a wrong CPU type!\n"; | |
1da177e4 | 93 | s32 argc = fw_arg0; |
8a185d14 | 94 | s32 *argv = (void *)fw_arg1; |
1da177e4 | 95 | u32 magic = fw_arg2; |
8a185d14 | 96 | s32 *prom_vec = (void *)fw_arg3; |
1da177e4 LT |
97 | |
98 | /* | |
99 | * Determine which PROM we have | |
100 | * (and therefore which machine we're on!) | |
101 | */ | |
102 | which_prom(magic, prom_vec); | |
103 | ||
104 | if (prom_is_rex(magic)) | |
105 | rex_clear_cache(); | |
106 | ||
70342287 | 107 | /* Register the early console. */ |
36de48de MR |
108 | register_prom_console(); |
109 | ||
1da177e4 LT |
110 | /* Were we compiled with the right CPU option? */ |
111 | #if defined(CONFIG_CPU_R3000) | |
10cc3529 RB |
112 | if ((current_cpu_type() == CPU_R4000SC) || |
113 | (current_cpu_type() == CPU_R4400SC)) { | |
8a185d14 MR |
114 | static char r4k_msg[] __initdata = |
115 | "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n"; | |
1da177e4 LT |
116 | printk(cpu_msg); |
117 | printk(r4k_msg); | |
118 | dec_machine_halt(); | |
119 | } | |
120 | #endif | |
121 | ||
122 | #if defined(CONFIG_CPU_R4X00) | |
10cc3529 RB |
123 | if ((current_cpu_type() == CPU_R3000) || |
124 | (current_cpu_type() == CPU_R3000A)) { | |
8a185d14 MR |
125 | static char r3k_msg[] __initdata = |
126 | "Please recompile with \"CONFIG_CPU_R3000 = y\".\n"; | |
1da177e4 LT |
127 | printk(cpu_msg); |
128 | printk(r3k_msg); | |
129 | dec_machine_halt(); | |
130 | } | |
131 | #endif | |
132 | ||
133 | prom_meminit(magic); | |
134 | prom_identify_arch(magic); | |
135 | prom_init_cmdline(argc, argv, magic); | |
136 | } |