Pull percpu-dtc into release branch
[pandora-kernel.git] / arch / mips / dec / prom / init.c
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
21 int (*__rex_bootinit)(void);
22 int (*__rex_bootread)(void);
23 int (*__rex_getbitmap)(memmap *);
24 unsigned long *(*__rex_slot_address)(int);
25 void *(*__rex_gettcinfo)(void);
26 int (*__rex_getsysid)(void);
27 void (*__rex_clear_cache)(void);
28
29 int (*__prom_getchar)(void);
30 char *(*__prom_getenv)(char *);
31 int (*__prom_printf)(char *, ...);
32
33 int (*__pmax_open)(char*, int);
34 int (*__pmax_lseek)(int, long, int);
35 int (*__pmax_read)(int, void *, int);
36 int (*__pmax_close)(int);
37
38
39 /*
40  * Detect which PROM the DECSTATION has, and set the callback vectors
41  * appropriately.
42  */
43 void __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
87 void __init prom_init(void)
88 {
89         extern void ATTRIB_NORET 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         /* Were we compiled with the right CPU option? */
107 #if defined(CONFIG_CPU_R3000)
108         if ((current_cpu_data.cputype == CPU_R4000SC) ||
109             (current_cpu_data.cputype == CPU_R4400SC)) {
110                 static char r4k_msg[] __initdata =
111                         "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n";
112                 printk(cpu_msg);
113                 printk(r4k_msg);
114                 dec_machine_halt();
115         }
116 #endif
117
118 #if defined(CONFIG_CPU_R4X00)
119         if ((current_cpu_data.cputype == CPU_R3000) ||
120             (current_cpu_data.cputype == CPU_R3000A)) {
121                 static char r3k_msg[] __initdata =
122                         "Please recompile with \"CONFIG_CPU_R3000 = y\".\n";
123                 printk(cpu_msg);
124                 printk(r3k_msg);
125                 dec_machine_halt();
126         }
127 #endif
128
129         prom_meminit(magic);
130         prom_identify_arch(magic);
131         prom_init_cmdline(argc, argv, magic);
132 }