121 lines
2.8 KiB
C
121 lines
2.8 KiB
C
/*
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* Copyright (C) 2007 OpenWrt.org
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* Copyright (C) Gabor Juhos
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/autoconf.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <adm5120_info.h>
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#include <myloader.h>
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/* boot loaders specific definitions */
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#define CFE_EPTSEAL 0x43464531 /* CFE1 is the magic number to recognize CFE from other bootloaders */
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struct adm5120_info adm5120_info = {
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.cpu_speed = CPU_SPEED_175,
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.cpu_package = CPU_PACKAGE_PQFP,
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.boot_loader = BOOT_LOADER_UNKNOWN,
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.board_type = BOARD_TYPE_UNKNOWN
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};
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static char *boot_loader_names[BOOT_LOADER_LAST+1] = {
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[BOOT_LOADER_UNKNOWN] = "Unknown",
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[BOOT_LOADER_CFE] = "CFE",
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[BOOT_LOADER_UBOOT] = "U-Boot",
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[BOOT_LOADER_MYLOADER] = "MyLoader"
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};
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/*
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* Boot loader detection routines
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*/
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static int __init detect_cfe(void)
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{
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/*
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* This method only works, when we are booted directly from the CFE.
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*/
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uint32_t cfe_handle = (uint32_t) fw_arg0;
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uint32_t cfe_a1_val = (uint32_t) fw_arg1;
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uint32_t cfe_entry = (uint32_t) fw_arg2;
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uint32_t cfe_seal = (uint32_t) fw_arg3;
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/* Check for CFE by finding the CFE magic number */
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if (cfe_seal != CFE_EPTSEAL) {
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/* We are not booted from CFE */
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return 0;
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}
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/* cfe_a1_val must be 0, because only one CPU present in the ADM5120 SoC */
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if (cfe_a1_val != 0) {
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return 0;
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}
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/* The cfe_handle, and the cfe_entry must be kernel mode addresses */
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if ((cfe_handle < KSEG0) || (cfe_entry < KSEG0)) {
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return 0;
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}
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return 1;
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}
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static int __init detect_uboot(void)
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{
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/* FIXME: not yet implemented */
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return 0;
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}
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static int __init detect_myloader(void)
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{
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struct mylo_system_params *sysp;
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struct mylo_board_params *boardp;
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struct mylo_partition_table *parts;
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sysp = (struct mylo_system_params *)(MYLO_MIPS_SYS_PARAMS);
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boardp = (struct mylo_board_params *)(MYLO_MIPS_BOARD_PARAMS);
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parts = (struct mylo_partition_table *)(MYLO_MIPS_PARTITIONS);
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/* Check for some magic numbers */
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if ((sysp->magic != MYLO_MAGIC_SYS_PARAMS) ||
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(boardp->magic != MYLO_MAGIC_BOARD_PARAMS) ||
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(parts->magic != MYLO_MAGIC_PARTITIONS))
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return 0;
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return 1;
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}
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static int __init detect_bootloader(void)
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{
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if (detect_cfe())
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return BOOT_LOADER_CFE;
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if (detect_uboot())
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return BOOT_LOADER_UBOOT;
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if (detect_myloader())
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return BOOT_LOADER_MYLOADER;
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return BOOT_LOADER_UNKNOWN;
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}
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void __init adm5120_info_show(void)
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{
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printk("adm5120: boot loader is %s\n", boot_loader_names[adm5120_info.boot_loader]);
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}
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void __init adm5120_info_init(void)
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{
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adm5120_info.boot_loader = detect_bootloader();
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adm5120_info_show();
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}
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