| John Crispin | 171bb2f | 2011-03-30 09:27:47 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify it |
| 3 | * under the terms of the GNU General Public License version 2 as published |
| 4 | * by the Free Software Foundation. |
| 5 | * |
| 6 | * Copyright (C) 2010 John Crispin <blogic@openwrt.org> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/io.h> |
| 12 | #include <linux/ioport.h> |
| 13 | #include <asm/bootinfo.h> |
| 14 | |
| 15 | #include <lantiq_soc.h> |
| 16 | |
| 17 | void __init plat_mem_setup(void) |
| 18 | { |
| 19 | /* assume 16M as default incase uboot fails to pass proper ramsize */ |
| 20 | unsigned long memsize = 16; |
| 21 | char **envp = (char **) KSEG1ADDR(fw_arg2); |
| 22 | |
| 23 | ioport_resource.start = IOPORT_RESOURCE_START; |
| 24 | ioport_resource.end = IOPORT_RESOURCE_END; |
| 25 | iomem_resource.start = IOMEM_RESOURCE_START; |
| 26 | iomem_resource.end = IOMEM_RESOURCE_END; |
| 27 | |
| 28 | set_io_port_base((unsigned long) KSEG1); |
| 29 | |
| 30 | while (*envp) { |
| 31 | char *e = (char *)KSEG1ADDR(*envp); |
| 32 | if (!strncmp(e, "memsize=", 8)) { |
| 33 | e += 8; |
| 34 | if (strict_strtoul(e, 0, &memsize)) |
| 35 | pr_warn("bad memsize specified\n"); |
| 36 | } |
| 37 | envp++; |
| 38 | } |
| 39 | memsize *= 1024 * 1024; |
| 40 | add_memory_region(0x00000000, memsize, BOOT_MEM_RAM); |
| 41 | } |