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