diff options
Diffstat (limited to 'target/linux/adm5120-2.6/files/arch/mips')
| -rw-r--r-- | target/linux/adm5120-2.6/files/arch/mips/adm5120/adm5120_info.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/target/linux/adm5120-2.6/files/arch/mips/adm5120/adm5120_info.c b/target/linux/adm5120-2.6/files/arch/mips/adm5120/adm5120_info.c new file mode 100644 index 0000000000..85e0df622b --- /dev/null +++ b/target/linux/adm5120-2.6/files/arch/mips/adm5120/adm5120_info.c @@ -0,0 +1,121 @@ +/* + * 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(); +} |