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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | /* * init.c: PROM library initialisation code. * * Copyright (C) 1998 Harald Koerfgen */ #include <linux/init.h> #include <linux/config.h> #include <asm/bootinfo.h> #include <asm/cpu.h> #include "prom.h" /* * PROM Interface (whichprom.c) */ typedef struct { int pagesize; unsigned char bitmap[0]; } memmap; int (*rex_bootinit)(void); int (*rex_bootread)(void); int (*rex_getbitmap)(memmap *); unsigned long *(*rex_slot_address)(int); void *(*rex_gettcinfo)(void); int (*rex_getsysid)(void); void (*rex_clear_cache)(void); int (*prom_getchar)(void); char *(*prom_getenv)(char *); int (*prom_printf)(char *, ...); int (*pmax_open)(char*, int); int (*pmax_lseek)(int, long, int); int (*pmax_read)(int, void *, int); int (*pmax_close)(int); extern void prom_meminit(unsigned int); extern void prom_identify_arch(unsigned int); extern void prom_init_cmdline(int, char **, unsigned long); /* * Detect which PROM's the DECSTATION has, and set the callback vectors * appropriately. */ void __init which_prom(unsigned long magic, int *prom_vec) { /* * No sign of the REX PROM's magic number means we assume a non-REX * machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx) */ if (magic == REX_PROM_MAGIC) { /* * Set up prom abstraction structure with REX entry points. */ rex_bootinit = (int (*)(void)) *(prom_vec + REX_PROM_BOOTINIT); rex_bootread = (int (*)(void)) *(prom_vec + REX_PROM_BOOTREAD); rex_getbitmap = (int (*)(memmap *)) *(prom_vec + REX_PROM_GETBITMAP); prom_getchar = (int (*)(void)) *(prom_vec + REX_PROM_GETCHAR); prom_getenv = (char *(*)(char *)) *(prom_vec + REX_PROM_GETENV); rex_getsysid = (int (*)(void)) *(prom_vec + REX_PROM_GETSYSID); rex_gettcinfo = (void *(*)(void)) *(prom_vec + REX_PROM_GETTCINFO); prom_printf = (int (*)(char *, ...)) *(prom_vec + REX_PROM_PRINTF); rex_slot_address = (unsigned long *(*)(int)) *(prom_vec + REX_PROM_SLOTADDR); rex_clear_cache = (void (*)(void)) * (prom_vec + REX_PROM_CLEARCACHE); } else { /* * Set up prom abstraction structure with non-REX entry points. */ prom_getchar = (int (*)(void)) PMAX_PROM_GETCHAR; prom_getenv = (char *(*)(char *)) PMAX_PROM_GETENV; prom_printf = (int (*)(char *, ...)) PMAX_PROM_PRINTF; pmax_open = (int (*)(char *, int)) PMAX_PROM_OPEN; pmax_lseek = (int (*)(int, long, int)) PMAX_PROM_LSEEK; pmax_read = (int (*)(int, void *, int)) PMAX_PROM_READ; pmax_close = (int (*)(int)) PMAX_PROM_CLOSE; } } int __init prom_init(int argc, char **argv, unsigned long magic, int *prom_vec) { extern void dec_machine_halt(void); /* Determine which PROM's we have (and therefore which machine we're on!) */ which_prom(magic, prom_vec); if (magic == REX_PROM_MAGIC) rex_clear_cache(); /* Were we compiled with the right CPU option? */ #if defined(CONFIG_CPU_R3000) if ((mips_cpu.cputype == CPU_R4000SC) || (mips_cpu.cputype == CPU_R4400SC)) { prom_printf("Sorry, this kernel is compiled for the wrong CPU type!\n"); prom_printf("Please recompile with \"CONFIG_CPU_R4x00 = y\"\n"); dec_machine_halt(); } #endif #if defined(CONFIG_CPU_R4X00) if ((mips_cpu.cputype == CPU_R3000) || (mips_cpu.cputype == CPU_R3000A)) { prom_printf("Sorry, this kernel is compiled for the wrong CPU type!\n"); prom_printf("Please recompile with \"CONFIG_CPU_R3000 = y\"\n"); dec_machine_halt(); } #endif prom_meminit(magic); prom_identify_arch(magic); prom_init_cmdline(argc, argv, magic); return 0; } |