121 lines
2.1 KiB
C
121 lines
2.1 KiB
C
/*
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* Mikrotik's RouterBOOT specific prom routines
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/module.h>
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#include <linux/routerboot.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/mach-adm5120/adm5120_defs.h>
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#include <prom/routerboot.h>
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#include "prom_read.h"
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struct rb_hard_settings rb_hs;
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static int rb_found;
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static int __init routerboot_load_hs(u8 *buf, u16 buflen)
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{
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u16 id, len;
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memset(&rb_hs, 0, sizeof(rb_hs));
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if (buflen < 4)
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return -1;
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if (prom_read_le32(buf) != RB_MAGIC_HARD)
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return -1;
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/* skip magic value */
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buf += 4;
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buflen -= 4;
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while (buflen > 2) {
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id = prom_read_le16(buf);
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buf += 2;
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buflen -= 2;
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if (id == RB_ID_TERMINATOR || buflen < 2)
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break;
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len = prom_read_le16(buf);
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buf += 2;
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buflen -= 2;
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if (buflen < len)
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break;
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switch (id) {
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case RB_ID_BIOS_VERSION:
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rb_hs.bios_ver = (char *)buf;
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break;
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case RB_ID_BOARD_NAME:
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rb_hs.name = (char *)buf;
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break;
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case RB_ID_MEMORY_SIZE:
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rb_hs.mem_size = prom_read_le32(buf);
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break;
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case RB_ID_MAC_ADDRESS_COUNT:
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rb_hs.mac_count = prom_read_le32(buf);
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break;
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case RB_ID_MAC_ADDRESS_PACK:
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if ((len / RB_MAC_SIZE) > 0)
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rb_hs.mac_base = buf;
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break;
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}
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buf += len;
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buflen -= len;
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}
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return 0;
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}
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#define RB_BS_OFFS 0x14
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#define RB_OFFS_MAX (128*1024)
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int __init routerboot_present(void)
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{
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struct rb_bios_settings *bs;
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u8 *base;
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u32 off, len;
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if (rb_found)
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goto out;
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base = (u8 *)KSEG1ADDR(ADM5120_SRAM0_BASE);
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bs = (struct rb_bios_settings *)(base + RB_BS_OFFS);
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off = prom_read_le32(&bs->hs_offs);
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len = prom_read_le32(&bs->hs_size);
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if (off > RB_OFFS_MAX)
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goto out;
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if (routerboot_load_hs(base+off, len) != 0)
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goto out;
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rb_found = 1;
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out:
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return rb_found;
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}
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char *routerboot_get_boardname(void)
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{
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if (rb_found == 0)
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return NULL;
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return rb_hs.name;
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}
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