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/*
* $Id$
*
* Copyright (C) 2007 OpenWrt.org
* Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
*
* 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 <linux/module.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/string.h>
#include <asm/mach-bcm963xx/bootloaders.h>
static char *boot_loader_names[BOOT_LOADER_LAST+1] = {
[BOOT_LOADER_UNKNOWN] = "Unknown",
[BOOT_LOADER_CFE] = "CFE",
[BOOT_LOADER_REDBOOT] = "RedBoot",
[BOOT_LOADER_CFE2] = "CFEv2"
};
/* boot loaders specific definitions */
#define CFE_EPTSEAL 0x43464531 /* CFE1 is the magic number to recognize CFE from other bootloaders */
int boot_loader_type;
/*
* 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_redboot(void)
{
/* On Inventel Livebox, the boot loader is passed as a command line argument, check for it */
if (!strncmp(arcs_cmdline, "boot_loader=RedBoot", 19))
return 1;
return 0;
}
void __init detect_bootloader(void)
{
if (detect_cfe()) {
boot_loader_type = BOOT_LOADER_CFE;
}
if (detect_redboot()) {
boot_loader_type = BOOT_LOADER_REDBOOT;
}
else {
/* Some devices are using CFE, but it is not detected as is */
boot_loader_type = BOOT_LOADER_CFE2;
}
printk("Boot loader is : %s\n", boot_loader_names[boot_loader_type]);
}
void __init detect_board(void)
{
switch (boot_loader_type)
{
case BOOT_LOADER_CFE:
break;
case BOOT_LOADER_REDBOOT:
break;
default:
break;
}
}
EXPORT_SYMBOL(boot_loader_type);
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