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For most architectures free_initrd_mem just expands to the same free_reserved_area call. Provide that as a generic implementation marked __weak. Link: http://lkml.kernel.org/r/20190213174621.29297-8-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Steven Price <steven.price@arm.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/h8300/mm/init.c
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*
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* Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
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* Kenneth Albanowski <kjahds@kjahds.com>,
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* Copyright (C) 2000 Lineo, Inc. (www.lineo.com)
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*
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* Based on:
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*
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* linux/arch/m68knommu/mm/init.c
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* linux/arch/m68k/mm/init.c
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*
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* Copyright (C) 1995 Hamish Macdonald
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*
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* JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)
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* DEC/2000 -- linux 2.4 support <davidm@snapgear.com>
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*/
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/mman.h>
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#include <linux/mm.h>
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#include <linux/swap.h>
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#include <linux/init.h>
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include <linux/memblock.h>
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#include <linux/gfp.h>
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#include <asm/setup.h>
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#include <asm/segment.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/sections.h>
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/*
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* ZERO_PAGE is a special page that is used for zero-initialized
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* data and COW.
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*/
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unsigned long empty_zero_page;
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/*
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* paging_init() continues the virtual memory environment setup which
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* was begun by the code in arch/head.S.
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* The parameters are pointers to where to stick the starting and ending
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* addresses of available kernel virtual memory.
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*/
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void __init paging_init(void)
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{
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/*
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* Make sure start_mem is page aligned, otherwise bootmem and
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* page_alloc get different views og the world.
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*/
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unsigned long start_mem = PAGE_ALIGN(memory_start);
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unsigned long end_mem = memory_end & PAGE_MASK;
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pr_debug("start_mem is %#lx\nvirtual_end is %#lx\n",
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start_mem, end_mem);
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/*
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* Initialize the bad page table and bad page to point
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* to a couple of allocated pages.
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*/
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empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE, PAGE_SIZE);
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if (!empty_zero_page)
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panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
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__func__, PAGE_SIZE, PAGE_SIZE);
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/*
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* Set up SFC/DFC registers (user data space).
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*/
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set_fs(USER_DS);
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pr_debug("before free_area_init\n");
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pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
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start_mem, end_mem);
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{
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unsigned long zones_size[MAX_NR_ZONES] = {0, };
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zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
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free_area_init(zones_size);
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}
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}
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void __init mem_init(void)
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{
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pr_devel("Mem_init: start=%lx, end=%lx\n", memory_start, memory_end);
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high_memory = (void *) (memory_end & PAGE_MASK);
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max_mapnr = MAP_NR(high_memory);
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/* this will put all low memory onto the freelists */
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memblock_free_all();
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mem_init_print_info(NULL);
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}
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void
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free_initmem(void)
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{
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free_initmem_default(-1);
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}
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