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137 lines
3.5 KiB
137 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* init.c: PROM library initialisation code. |
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* |
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* Copyright (C) 1998 Harald Koerfgen |
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* Copyright (C) 2002, 2004 Maciej W. Rozycki |
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*/ |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/linkage.h> |
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#include <linux/smp.h> |
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#include <linux/string.h> |
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#include <linux/types.h> |
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#include <asm/bootinfo.h> |
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#include <asm/cpu.h> |
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#include <asm/cpu-type.h> |
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#include <asm/processor.h> |
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#include <asm/dec/prom.h> |
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int (*__rex_bootinit)(void); |
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int (*__rex_bootread)(void); |
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int (*__rex_getbitmap)(memmap *); |
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unsigned long *(*__rex_slot_address)(int); |
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void *(*__rex_gettcinfo)(void); |
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int (*__rex_getsysid)(void); |
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void (*__rex_clear_cache)(void); |
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int (*__prom_getchar)(void); |
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char *(*__prom_getenv)(char *); |
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int (*__prom_printf)(char *, ...); |
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int (*__pmax_open)(char*, int); |
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int (*__pmax_lseek)(int, long, int); |
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int (*__pmax_read)(int, void *, int); |
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int (*__pmax_close)(int); |
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/* |
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* Detect which PROM the DECSTATION has, and set the callback vectors |
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* appropriately. |
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*/ |
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void __init which_prom(s32 magic, s32 *prom_vec) |
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{ |
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/* |
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* No sign of the REX PROM's magic number means we assume a non-REX |
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* machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx) |
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*/ |
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if (prom_is_rex(magic)) { |
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/* |
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* Set up prom abstraction structure with REX entry points. |
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*/ |
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__rex_bootinit = |
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(void *)(long)*(prom_vec + REX_PROM_BOOTINIT); |
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__rex_bootread = |
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(void *)(long)*(prom_vec + REX_PROM_BOOTREAD); |
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__rex_getbitmap = |
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(void *)(long)*(prom_vec + REX_PROM_GETBITMAP); |
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__prom_getchar = |
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(void *)(long)*(prom_vec + REX_PROM_GETCHAR); |
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__prom_getenv = |
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(void *)(long)*(prom_vec + REX_PROM_GETENV); |
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__rex_getsysid = |
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(void *)(long)*(prom_vec + REX_PROM_GETSYSID); |
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__rex_gettcinfo = |
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(void *)(long)*(prom_vec + REX_PROM_GETTCINFO); |
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__prom_printf = |
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(void *)(long)*(prom_vec + REX_PROM_PRINTF); |
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__rex_slot_address = |
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(void *)(long)*(prom_vec + REX_PROM_SLOTADDR); |
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__rex_clear_cache = |
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(void *)(long)*(prom_vec + REX_PROM_CLEARCACHE); |
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} else { |
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/* |
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* Set up prom abstraction structure with non-REX entry points. |
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*/ |
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__prom_getchar = (void *)PMAX_PROM_GETCHAR; |
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__prom_getenv = (void *)PMAX_PROM_GETENV; |
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__prom_printf = (void *)PMAX_PROM_PRINTF; |
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__pmax_open = (void *)PMAX_PROM_OPEN; |
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__pmax_lseek = (void *)PMAX_PROM_LSEEK; |
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__pmax_read = (void *)PMAX_PROM_READ; |
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__pmax_close = (void *)PMAX_PROM_CLOSE; |
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} |
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} |
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void __init prom_init(void) |
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{ |
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extern void dec_machine_halt(void); |
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static const char cpu_msg[] __initconst = |
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"Sorry, this kernel is compiled for a wrong CPU type!\n"; |
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s32 argc = fw_arg0; |
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s32 *argv = (void *)fw_arg1; |
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u32 magic = fw_arg2; |
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s32 *prom_vec = (void *)fw_arg3; |
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/* |
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* Determine which PROM we have |
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* (and therefore which machine we're on!) |
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*/ |
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which_prom(magic, prom_vec); |
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if (prom_is_rex(magic)) |
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rex_clear_cache(); |
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/* Register the early console. */ |
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register_prom_console(); |
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/* Were we compiled with the right CPU option? */ |
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#if defined(CONFIG_CPU_R3000) |
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if ((current_cpu_type() == CPU_R4000SC) || |
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(current_cpu_type() == CPU_R4400SC)) { |
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static const char r4k_msg[] __initconst = |
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"Please recompile with \"CONFIG_CPU_R4x00 = y\".\n"; |
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printk(cpu_msg); |
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printk(r4k_msg); |
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dec_machine_halt(); |
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} |
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#endif |
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#if defined(CONFIG_CPU_R4X00) |
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if ((current_cpu_type() == CPU_R3000) || |
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(current_cpu_type() == CPU_R3000A)) { |
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static const char r3k_msg[] __initconst = |
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"Please recompile with \"CONFIG_CPU_R3000 = y\".\n"; |
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printk(cpu_msg); |
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printk(r3k_msg); |
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dec_machine_halt(); |
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} |
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#endif |
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prom_meminit(magic); |
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prom_identify_arch(magic); |
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prom_init_cmdline(argc, argv, magic); |
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}
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