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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * init.c: PROM library initialisation code. | |
4 | * | |
5 | * Copyright (C) 1998 Harald Koerfgen | |
6 | * Copyright (C) 2002, 2004 Maciej W. Rozycki | |
7 | */ | |
1da177e4 | 8 | #include <linux/init.h> |
8a185d14 MR |
9 | #include <linux/kernel.h> |
10 | #include <linux/linkage.h> | |
1da177e4 LT |
11 | #include <linux/smp.h> |
12 | #include <linux/string.h> | |
13 | #include <linux/types.h> | |
14 | ||
15 | #include <asm/bootinfo.h> | |
16 | #include <asm/cpu.h> | |
69f24d17 | 17 | #include <asm/cpu-type.h> |
1da177e4 LT |
18 | #include <asm/processor.h> |
19 | ||
20 | #include <asm/dec/prom.h> | |
21 | ||
22 | ||
23 | int (*__rex_bootinit)(void); | |
24 | int (*__rex_bootread)(void); | |
25 | int (*__rex_getbitmap)(memmap *); | |
26 | unsigned long *(*__rex_slot_address)(int); | |
27 | void *(*__rex_gettcinfo)(void); | |
28 | int (*__rex_getsysid)(void); | |
29 | void (*__rex_clear_cache)(void); | |
30 | ||
31 | int (*__prom_getchar)(void); | |
32 | char *(*__prom_getenv)(char *); | |
33 | int (*__prom_printf)(char *, ...); | |
34 | ||
35 | int (*__pmax_open)(char*, int); | |
36 | int (*__pmax_lseek)(int, long, int); | |
37 | int (*__pmax_read)(int, void *, int); | |
38 | int (*__pmax_close)(int); | |
39 | ||
40 | ||
41 | /* | |
42 | * Detect which PROM the DECSTATION has, and set the callback vectors | |
43 | * appropriately. | |
44 | */ | |
45 | void __init which_prom(s32 magic, s32 *prom_vec) | |
46 | { | |
47 | /* | |
48 | * No sign of the REX PROM's magic number means we assume a non-REX | |
49 | * machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx) | |
50 | */ | |
51 | if (prom_is_rex(magic)) { | |
52 | /* | |
53 | * Set up prom abstraction structure with REX entry points. | |
54 | */ | |
55 | __rex_bootinit = | |
56 | (void *)(long)*(prom_vec + REX_PROM_BOOTINIT); | |
57 | __rex_bootread = | |
58 | (void *)(long)*(prom_vec + REX_PROM_BOOTREAD); | |
59 | __rex_getbitmap = | |
60 | (void *)(long)*(prom_vec + REX_PROM_GETBITMAP); | |
61 | __prom_getchar = | |
62 | (void *)(long)*(prom_vec + REX_PROM_GETCHAR); | |
63 | __prom_getenv = | |
64 | (void *)(long)*(prom_vec + REX_PROM_GETENV); | |
65 | __rex_getsysid = | |
66 | (void *)(long)*(prom_vec + REX_PROM_GETSYSID); | |
67 | __rex_gettcinfo = | |
68 | (void *)(long)*(prom_vec + REX_PROM_GETTCINFO); | |
69 | __prom_printf = | |
70 | (void *)(long)*(prom_vec + REX_PROM_PRINTF); | |
71 | __rex_slot_address = | |
72 | (void *)(long)*(prom_vec + REX_PROM_SLOTADDR); | |
73 | __rex_clear_cache = | |
74 | (void *)(long)*(prom_vec + REX_PROM_CLEARCACHE); | |
75 | } else { | |
76 | /* | |
77 | * Set up prom abstraction structure with non-REX entry points. | |
78 | */ | |
79 | __prom_getchar = (void *)PMAX_PROM_GETCHAR; | |
80 | __prom_getenv = (void *)PMAX_PROM_GETENV; | |
81 | __prom_printf = (void *)PMAX_PROM_PRINTF; | |
82 | __pmax_open = (void *)PMAX_PROM_OPEN; | |
83 | __pmax_lseek = (void *)PMAX_PROM_LSEEK; | |
84 | __pmax_read = (void *)PMAX_PROM_READ; | |
85 | __pmax_close = (void *)PMAX_PROM_CLOSE; | |
86 | } | |
87 | } | |
88 | ||
89 | void __init prom_init(void) | |
90 | { | |
b3f6df9f | 91 | extern void dec_machine_halt(void); |
06324664 | 92 | static const char cpu_msg[] __initconst = |
1da177e4 | 93 | "Sorry, this kernel is compiled for a wrong CPU type!\n"; |
1da177e4 | 94 | s32 argc = fw_arg0; |
8a185d14 | 95 | s32 *argv = (void *)fw_arg1; |
1da177e4 | 96 | u32 magic = fw_arg2; |
8a185d14 | 97 | s32 *prom_vec = (void *)fw_arg3; |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Determine which PROM we have | |
101 | * (and therefore which machine we're on!) | |
102 | */ | |
103 | which_prom(magic, prom_vec); | |
104 | ||
105 | if (prom_is_rex(magic)) | |
106 | rex_clear_cache(); | |
107 | ||
07217d75 | 108 | /* Register the early console. */ |
36de48de MR |
109 | register_prom_console(); |
110 | ||
1da177e4 LT |
111 | /* Were we compiled with the right CPU option? */ |
112 | #if defined(CONFIG_CPU_R3000) | |
10cc3529 RB |
113 | if ((current_cpu_type() == CPU_R4000SC) || |
114 | (current_cpu_type() == CPU_R4400SC)) { | |
06324664 | 115 | static const char r4k_msg[] __initconst = |
8a185d14 | 116 | "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n"; |
1da177e4 LT |
117 | printk(cpu_msg); |
118 | printk(r4k_msg); | |
119 | dec_machine_halt(); | |
120 | } | |
121 | #endif | |
122 | ||
123 | #if defined(CONFIG_CPU_R4X00) | |
10cc3529 RB |
124 | if ((current_cpu_type() == CPU_R3000) || |
125 | (current_cpu_type() == CPU_R3000A)) { | |
06324664 | 126 | static const char r3k_msg[] __initconst = |
8a185d14 | 127 | "Please recompile with \"CONFIG_CPU_R3000 = y\".\n"; |
1da177e4 LT |
128 | printk(cpu_msg); |
129 | printk(r3k_msg); | |
130 | dec_machine_halt(); | |
131 | } | |
132 | #endif | |
133 | ||
134 | prom_meminit(magic); | |
135 | prom_identify_arch(magic); | |
136 | prom_init_cmdline(argc, argv, magic); | |
137 | } |