| 1 | /* |
| 2 | * ADMBoot specific prom routines |
| 3 | * |
| 4 | * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/errno.h> |
| 15 | |
| 16 | #include <asm/addrspace.h> |
| 17 | #include <asm/byteorder.h> |
| 18 | |
| 19 | #include <asm/mach-adm5120/adm5120_defs.h> |
| 20 | #include <prom/admboot.h> |
| 21 | #include "prom_read.h" |
| 22 | |
| 23 | #define ADMBOOT_MAGIC_MAC_BASE 0x636D676D /* 'mgmc' */ |
| 24 | |
| 25 | int __init admboot_get_mac_base(u32 offset, u32 len, u8 *mac) |
| 26 | { |
| 27 | u8 *cfg; |
| 28 | int i; |
| 29 | |
| 30 | cfg = (u8 *) KSEG1ADDR(ADM5120_SRAM0_BASE + offset); |
| 31 | for (i = 0; i < len; i += 4) { |
| 32 | u32 magic; |
| 33 | |
| 34 | magic = prom_read_le32(cfg + i); |
| 35 | if (magic == ADMBOOT_MAGIC_MAC_BASE) { |
| 36 | int j; |
| 37 | |
| 38 | for (j = 0; j < 6; j++) |
| 39 | mac[j] = cfg[i + 4 + j]; |
| 40 | |
| 41 | return 0; |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | return -ENXIO; |
| 46 | } |
| 47 | |
