42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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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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* Copyright (C) 2010 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <asm/bootinfo.h>
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#include <lantiq_soc.h>
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void __init plat_mem_setup(void)
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{
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/* assume 16M as default incase uboot fails to pass proper ramsize */
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unsigned long memsize = 16;
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char **envp = (char **) KSEG1ADDR(fw_arg2);
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ioport_resource.start = IOPORT_RESOURCE_START;
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ioport_resource.end = IOPORT_RESOURCE_END;
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iomem_resource.start = IOMEM_RESOURCE_START;
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iomem_resource.end = IOMEM_RESOURCE_END;
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set_io_port_base((unsigned long) KSEG1);
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while (*envp) {
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char *e = (char *)KSEG1ADDR(*envp);
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if (!strncmp(e, "memsize=", 8)) {
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e += 8;
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if (strict_strtoul(e, 0, &memsize))
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pr_warn("bad memsize specified\n");
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}
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envp++;
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}
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memsize *= 1024 * 1024;
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add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
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}
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