52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
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*/
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#include <linux/memblock.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/pfn.h>
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#include <linux/proc_fs.h>
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#include <linux/string.h>
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#include <linux/swap.h>
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#include <asm/bootinfo.h>
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#include <asm/page.h>
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#include <asm/sections.h>
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#include <asm/mach-ar7/ar7.h>
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static int __init memsize(void)
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{
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u32 size = (64 << 20);
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u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
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u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
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u32 *tmpaddr = addr;
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while (tmpaddr > kernel_end) {
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*tmpaddr = (u32)tmpaddr;
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size >>= 1;
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tmpaddr -= size >> 2;
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}
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do {
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tmpaddr += size >> 2;
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if (*tmpaddr != (u32)tmpaddr)
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break;
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size <<= 1;
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} while (size < (64 << 20));
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writel((u32)tmpaddr, &addr);
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return size;
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}
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void __init prom_meminit(void)
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{
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unsigned long pages;
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pages = memsize() >> PAGE_SHIFT;
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memblock_add(PHYS_OFFSET, pages << PAGE_SHIFT);
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}
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