mirror of https://github.com/hak5/openwrt.git
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2007 OpenWrt.org
|
|
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
|
|
* 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);
|