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