diff options
Diffstat (limited to 'target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c')
| -rw-r--r-- | target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c new file mode 100644 index 000000000..d492aa3cd --- /dev/null +++ b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/info.c @@ -0,0 +1,86 @@ +/* + * $Id$ + * + * 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 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; + printk("Boot loader is : %s\n", boot_loader_names[boot_loader_type]); + } + + if (detect_redboot()) { + boot_loader_type = BOOT_LOADER_REDBOOT; + } + else + boot_loader_type = BOOT_LOADER_UNKNOWN; +} + +EXPORT_SYMBOL(boot_loader_type); |