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51 lines
1.0 KiB
51 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2007 Felix Fietkau <[email protected]> |
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* Copyright (C) 2007 Eugene Konev <[email protected]> |
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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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