forked from Minki/linux
24bbd929e6
This splits off the reservation of the memory occupied by the FDT binary itself from the processing of the memory reservations it contains. This is necessary because the physical address of the FDT, which is needed to perform the reservation, may not be known to the FDT driver core, i.e., it may be mapped outside the linear direct mapping, in which case __pa() returns a bogus value. Cc: Russell King <linux@arm.linux.org.uk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
754 lines
18 KiB
C
754 lines
18 KiB
C
/*
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* linux/arch/arm/mm/init.c
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*
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* Copyright (C) 1995-2005 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/swap.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/mman.h>
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#include <linux/export.h>
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#include <linux/nodemask.h>
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#include <linux/initrd.h>
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#include <linux/of_fdt.h>
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#include <linux/highmem.h>
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#include <linux/gfp.h>
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#include <linux/memblock.h>
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#include <linux/dma-contiguous.h>
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#include <linux/sizes.h>
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#include <asm/cp15.h>
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#include <asm/mach-types.h>
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#include <asm/memblock.h>
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#include <asm/prom.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/system_info.h>
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#include <asm/tlb.h>
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#include <asm/fixmap.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "mm.h"
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#ifdef CONFIG_CPU_CP15_MMU
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unsigned long __init __clear_cr(unsigned long mask)
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{
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cr_alignment = cr_alignment & ~mask;
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return cr_alignment;
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}
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#endif
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static phys_addr_t phys_initrd_start __initdata = 0;
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static unsigned long phys_initrd_size __initdata = 0;
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static int __init early_initrd(char *p)
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{
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phys_addr_t start;
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unsigned long size;
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char *endp;
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start = memparse(p, &endp);
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if (*endp == ',') {
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size = memparse(endp + 1, NULL);
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phys_initrd_start = start;
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phys_initrd_size = size;
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}
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return 0;
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}
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early_param("initrd", early_initrd);
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static int __init parse_tag_initrd(const struct tag *tag)
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{
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pr_warn("ATAG_INITRD is deprecated; "
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"please update your bootloader.\n");
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phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
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phys_initrd_size = tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD, parse_tag_initrd);
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static int __init parse_tag_initrd2(const struct tag *tag)
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{
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phys_initrd_start = tag->u.initrd.start;
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phys_initrd_size = tag->u.initrd.size;
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return 0;
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}
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__tagtable(ATAG_INITRD2, parse_tag_initrd2);
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static void __init find_limits(unsigned long *min, unsigned long *max_low,
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unsigned long *max_high)
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{
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*max_low = PFN_DOWN(memblock_get_current_limit());
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*min = PFN_UP(memblock_start_of_DRAM());
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*max_high = PFN_DOWN(memblock_end_of_DRAM());
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}
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#ifdef CONFIG_ZONE_DMA
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phys_addr_t arm_dma_zone_size __read_mostly;
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EXPORT_SYMBOL(arm_dma_zone_size);
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/*
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* The DMA mask corresponding to the maximum bus address allocatable
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* using GFP_DMA. The default here places no restriction on DMA
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* allocations. This must be the smallest DMA mask in the system,
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* so a successful GFP_DMA allocation will always satisfy this.
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*/
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phys_addr_t arm_dma_limit;
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unsigned long arm_dma_pfn_limit;
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static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
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unsigned long dma_size)
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{
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if (size[0] <= dma_size)
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return;
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size[ZONE_NORMAL] = size[0] - dma_size;
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size[ZONE_DMA] = dma_size;
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hole[ZONE_NORMAL] = hole[0];
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hole[ZONE_DMA] = 0;
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}
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#endif
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void __init setup_dma_zone(const struct machine_desc *mdesc)
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{
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#ifdef CONFIG_ZONE_DMA
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if (mdesc->dma_zone_size) {
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arm_dma_zone_size = mdesc->dma_zone_size;
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arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1;
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} else
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arm_dma_limit = 0xffffffff;
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arm_dma_pfn_limit = arm_dma_limit >> PAGE_SHIFT;
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#endif
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}
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static void __init zone_sizes_init(unsigned long min, unsigned long max_low,
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unsigned long max_high)
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{
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unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
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struct memblock_region *reg;
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/*
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* initialise the zones.
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*/
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memset(zone_size, 0, sizeof(zone_size));
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/*
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* The memory size has already been determined. If we need
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* to do anything fancy with the allocation of this memory
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* to the zones, now is the time to do it.
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*/
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zone_size[0] = max_low - min;
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#ifdef CONFIG_HIGHMEM
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zone_size[ZONE_HIGHMEM] = max_high - max_low;
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#endif
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/*
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* Calculate the size of the holes.
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* holes = node_size - sum(bank_sizes)
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*/
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memcpy(zhole_size, zone_size, sizeof(zhole_size));
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for_each_memblock(memory, reg) {
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unsigned long start = memblock_region_memory_base_pfn(reg);
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unsigned long end = memblock_region_memory_end_pfn(reg);
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if (start < max_low) {
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unsigned long low_end = min(end, max_low);
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zhole_size[0] -= low_end - start;
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}
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#ifdef CONFIG_HIGHMEM
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if (end > max_low) {
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unsigned long high_start = max(start, max_low);
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zhole_size[ZONE_HIGHMEM] -= end - high_start;
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}
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#endif
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}
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#ifdef CONFIG_ZONE_DMA
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/*
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* Adjust the sizes according to any special requirements for
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* this machine type.
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*/
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if (arm_dma_zone_size)
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arm_adjust_dma_zone(zone_size, zhole_size,
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arm_dma_zone_size >> PAGE_SHIFT);
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#endif
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free_area_init_node(0, zone_size, min, zhole_size);
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}
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#ifdef CONFIG_HAVE_ARCH_PFN_VALID
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int pfn_valid(unsigned long pfn)
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{
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return memblock_is_memory(__pfn_to_phys(pfn));
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}
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EXPORT_SYMBOL(pfn_valid);
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#endif
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#ifndef CONFIG_SPARSEMEM
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static void __init arm_memory_present(void)
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{
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}
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#else
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static void __init arm_memory_present(void)
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{
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struct memblock_region *reg;
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for_each_memblock(memory, reg)
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memory_present(0, memblock_region_memory_base_pfn(reg),
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memblock_region_memory_end_pfn(reg));
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}
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#endif
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static bool arm_memblock_steal_permitted = true;
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phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
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{
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phys_addr_t phys;
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BUG_ON(!arm_memblock_steal_permitted);
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phys = memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE);
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memblock_free(phys, size);
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memblock_remove(phys, size);
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return phys;
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}
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void __init arm_memblock_init(const struct machine_desc *mdesc)
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{
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/* Register the kernel text, kernel data and initrd with memblock. */
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#ifdef CONFIG_XIP_KERNEL
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memblock_reserve(__pa(_sdata), _end - _sdata);
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#else
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memblock_reserve(__pa(_stext), _end - _stext);
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#endif
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#ifdef CONFIG_BLK_DEV_INITRD
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/* FDT scan will populate initrd_start */
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if (initrd_start && !phys_initrd_size) {
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phys_initrd_start = __virt_to_phys(initrd_start);
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phys_initrd_size = initrd_end - initrd_start;
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}
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initrd_start = initrd_end = 0;
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if (phys_initrd_size &&
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!memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
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pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",
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(u64)phys_initrd_start, phys_initrd_size);
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phys_initrd_start = phys_initrd_size = 0;
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}
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if (phys_initrd_size &&
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memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
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pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region - disabling initrd\n",
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(u64)phys_initrd_start, phys_initrd_size);
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phys_initrd_start = phys_initrd_size = 0;
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}
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if (phys_initrd_size) {
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memblock_reserve(phys_initrd_start, phys_initrd_size);
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/* Now convert initrd to virtual addresses */
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initrd_start = __phys_to_virt(phys_initrd_start);
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initrd_end = initrd_start + phys_initrd_size;
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}
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#endif
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arm_mm_memblock_reserve();
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/* reserve any platform specific memblock areas */
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if (mdesc->reserve)
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mdesc->reserve();
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early_init_fdt_reserve_self();
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early_init_fdt_scan_reserved_mem();
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/* reserve memory for DMA contiguous allocations */
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dma_contiguous_reserve(arm_dma_limit);
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arm_memblock_steal_permitted = false;
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memblock_dump_all();
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}
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void __init bootmem_init(void)
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{
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unsigned long min, max_low, max_high;
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memblock_allow_resize();
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max_low = max_high = 0;
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find_limits(&min, &max_low, &max_high);
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early_memtest((phys_addr_t)min << PAGE_SHIFT,
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(phys_addr_t)max_low << PAGE_SHIFT);
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/*
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* Sparsemem tries to allocate bootmem in memory_present(),
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* so must be done after the fixed reservations
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*/
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arm_memory_present();
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/*
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* sparse_init() needs the bootmem allocator up and running.
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*/
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sparse_init();
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/*
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* Now free the memory - free_area_init_node needs
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* the sparse mem_map arrays initialized by sparse_init()
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* for memmap_init_zone(), otherwise all PFNs are invalid.
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*/
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zone_sizes_init(min, max_low, max_high);
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/*
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* This doesn't seem to be used by the Linux memory manager any
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* more, but is used by ll_rw_block. If we can get rid of it, we
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* also get rid of some of the stuff above as well.
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*/
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min_low_pfn = min;
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max_low_pfn = max_low;
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max_pfn = max_high;
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}
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/*
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* Poison init memory with an undefined instruction (ARM) or a branch to an
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* undefined instruction (Thumb).
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*/
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static inline void poison_init_mem(void *s, size_t count)
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{
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u32 *p = (u32 *)s;
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for (; count != 0; count -= 4)
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*p++ = 0xe7fddef0;
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}
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static inline void
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free_memmap(unsigned long start_pfn, unsigned long end_pfn)
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{
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struct page *start_pg, *end_pg;
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phys_addr_t pg, pgend;
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/*
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* Convert start_pfn/end_pfn to a struct page pointer.
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*/
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start_pg = pfn_to_page(start_pfn - 1) + 1;
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end_pg = pfn_to_page(end_pfn - 1) + 1;
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/*
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* Convert to physical addresses, and
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* round start upwards and end downwards.
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*/
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pg = PAGE_ALIGN(__pa(start_pg));
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pgend = __pa(end_pg) & PAGE_MASK;
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/*
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* If there are free pages between these,
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* free the section of the memmap array.
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*/
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if (pg < pgend)
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memblock_free_early(pg, pgend - pg);
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}
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/*
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* The mem_map array can get very big. Free the unused area of the memory map.
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*/
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static void __init free_unused_memmap(void)
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{
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unsigned long start, prev_end = 0;
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struct memblock_region *reg;
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/*
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* This relies on each bank being in address order.
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* The banks are sorted previously in bootmem_init().
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*/
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for_each_memblock(memory, reg) {
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start = memblock_region_memory_base_pfn(reg);
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#ifdef CONFIG_SPARSEMEM
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/*
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* Take care not to free memmap entries that don't exist
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* due to SPARSEMEM sections which aren't present.
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*/
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start = min(start,
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ALIGN(prev_end, PAGES_PER_SECTION));
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#else
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/*
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* Align down here since the VM subsystem insists that the
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* memmap entries are valid from the bank start aligned to
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* MAX_ORDER_NR_PAGES.
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*/
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start = round_down(start, MAX_ORDER_NR_PAGES);
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#endif
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/*
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* If we had a previous bank, and there is a space
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* between the current bank and the previous, free it.
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*/
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if (prev_end && prev_end < start)
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free_memmap(prev_end, start);
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/*
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* Align up here since the VM subsystem insists that the
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* memmap entries are valid from the bank end aligned to
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* MAX_ORDER_NR_PAGES.
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*/
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prev_end = ALIGN(memblock_region_memory_end_pfn(reg),
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MAX_ORDER_NR_PAGES);
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}
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#ifdef CONFIG_SPARSEMEM
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if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
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free_memmap(prev_end,
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ALIGN(prev_end, PAGES_PER_SECTION));
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#endif
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}
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#ifdef CONFIG_HIGHMEM
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static inline void free_area_high(unsigned long pfn, unsigned long end)
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{
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for (; pfn < end; pfn++)
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free_highmem_page(pfn_to_page(pfn));
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}
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#endif
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static void __init free_highpages(void)
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{
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#ifdef CONFIG_HIGHMEM
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unsigned long max_low = max_low_pfn;
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struct memblock_region *mem, *res;
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/* set highmem page free */
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for_each_memblock(memory, mem) {
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unsigned long start = memblock_region_memory_base_pfn(mem);
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unsigned long end = memblock_region_memory_end_pfn(mem);
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/* Ignore complete lowmem entries */
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if (end <= max_low)
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continue;
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/* Truncate partial highmem entries */
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if (start < max_low)
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start = max_low;
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/* Find and exclude any reserved regions */
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for_each_memblock(reserved, res) {
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unsigned long res_start, res_end;
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res_start = memblock_region_reserved_base_pfn(res);
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res_end = memblock_region_reserved_end_pfn(res);
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if (res_end < start)
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continue;
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if (res_start < start)
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res_start = start;
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if (res_start > end)
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res_start = end;
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if (res_end > end)
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res_end = end;
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if (res_start != start)
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free_area_high(start, res_start);
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start = res_end;
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if (start == end)
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break;
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}
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/* And now free anything which remains */
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if (start < end)
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free_area_high(start, end);
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}
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#endif
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}
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/*
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* mem_init() marks the free areas in the mem_map and tells us how much
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* memory is free. This is done after various parts of the system have
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* claimed their memory after the kernel image.
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*/
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void __init mem_init(void)
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{
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#ifdef CONFIG_HAVE_TCM
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/* These pointers are filled in on TCM detection */
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extern u32 dtcm_end;
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extern u32 itcm_end;
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#endif
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set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
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/* this will put all unused low memory onto the freelists */
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free_unused_memmap();
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free_all_bootmem();
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#ifdef CONFIG_SA1111
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/* now that our DMA memory is actually so designated, we can free it */
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free_reserved_area(__va(PHYS_OFFSET), swapper_pg_dir, -1, NULL);
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#endif
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free_highpages();
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mem_init_print_info(NULL);
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#define MLK(b, t) b, t, ((t) - (b)) >> 10
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#define MLM(b, t) b, t, ((t) - (b)) >> 20
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#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
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pr_notice("Virtual kernel memory layout:\n"
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" vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
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#ifdef CONFIG_HAVE_TCM
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" DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
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" ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
#endif
|
|
" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#ifdef CONFIG_HIGHMEM
|
|
" pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
" .text : 0x%p" " - 0x%p" " (%4td kB)\n"
|
|
" .init : 0x%p" " - 0x%p" " (%4td kB)\n"
|
|
" .data : 0x%p" " - 0x%p" " (%4td kB)\n"
|
|
" .bss : 0x%p" " - 0x%p" " (%4td kB)\n",
|
|
|
|
MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
|
|
(PAGE_SIZE)),
|
|
#ifdef CONFIG_HAVE_TCM
|
|
MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
|
|
MLK(ITCM_OFFSET, (unsigned long) itcm_end),
|
|
#endif
|
|
MLK(FIXADDR_START, FIXADDR_END),
|
|
MLM(VMALLOC_START, VMALLOC_END),
|
|
MLM(PAGE_OFFSET, (unsigned long)high_memory),
|
|
#ifdef CONFIG_HIGHMEM
|
|
MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
|
|
(PAGE_SIZE)),
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
MLM(MODULES_VADDR, MODULES_END),
|
|
#endif
|
|
|
|
MLK_ROUNDUP(_text, _etext),
|
|
MLK_ROUNDUP(__init_begin, __init_end),
|
|
MLK_ROUNDUP(_sdata, _edata),
|
|
MLK_ROUNDUP(__bss_start, __bss_stop));
|
|
|
|
#undef MLK
|
|
#undef MLM
|
|
#undef MLK_ROUNDUP
|
|
|
|
/*
|
|
* Check boundaries twice: Some fundamental inconsistencies can
|
|
* be detected at build time already.
|
|
*/
|
|
#ifdef CONFIG_MMU
|
|
BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
#endif
|
|
|
|
if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
|
|
extern int sysctl_overcommit_memory;
|
|
/*
|
|
* On a machine this small we won't get
|
|
* anywhere without overcommit, so turn
|
|
* it on by default.
|
|
*/
|
|
sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ARM_KERNMEM_PERMS
|
|
struct section_perm {
|
|
unsigned long start;
|
|
unsigned long end;
|
|
pmdval_t mask;
|
|
pmdval_t prot;
|
|
pmdval_t clear;
|
|
};
|
|
|
|
static struct section_perm nx_perms[] = {
|
|
/* Make pages tables, etc before _stext RW (set NX). */
|
|
{
|
|
.start = PAGE_OFFSET,
|
|
.end = (unsigned long)_stext,
|
|
.mask = ~PMD_SECT_XN,
|
|
.prot = PMD_SECT_XN,
|
|
},
|
|
/* Make init RW (set NX). */
|
|
{
|
|
.start = (unsigned long)__init_begin,
|
|
.end = (unsigned long)_sdata,
|
|
.mask = ~PMD_SECT_XN,
|
|
.prot = PMD_SECT_XN,
|
|
},
|
|
#ifdef CONFIG_DEBUG_RODATA
|
|
/* Make rodata NX (set RO in ro_perms below). */
|
|
{
|
|
.start = (unsigned long)__start_rodata,
|
|
.end = (unsigned long)__init_begin,
|
|
.mask = ~PMD_SECT_XN,
|
|
.prot = PMD_SECT_XN,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_DEBUG_RODATA
|
|
static struct section_perm ro_perms[] = {
|
|
/* Make kernel code and rodata RX (set RO). */
|
|
{
|
|
.start = (unsigned long)_stext,
|
|
.end = (unsigned long)__init_begin,
|
|
#ifdef CONFIG_ARM_LPAE
|
|
.mask = ~L_PMD_SECT_RDONLY,
|
|
.prot = L_PMD_SECT_RDONLY,
|
|
#else
|
|
.mask = ~(PMD_SECT_APX | PMD_SECT_AP_WRITE),
|
|
.prot = PMD_SECT_APX | PMD_SECT_AP_WRITE,
|
|
.clear = PMD_SECT_AP_WRITE,
|
|
#endif
|
|
},
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Updates section permissions only for the current mm (sections are
|
|
* copied into each mm). During startup, this is the init_mm. Is only
|
|
* safe to be called with preemption disabled, as under stop_machine().
|
|
*/
|
|
static inline void section_update(unsigned long addr, pmdval_t mask,
|
|
pmdval_t prot)
|
|
{
|
|
struct mm_struct *mm;
|
|
pmd_t *pmd;
|
|
|
|
mm = current->active_mm;
|
|
pmd = pmd_offset(pud_offset(pgd_offset(mm, addr), addr), addr);
|
|
|
|
#ifdef CONFIG_ARM_LPAE
|
|
pmd[0] = __pmd((pmd_val(pmd[0]) & mask) | prot);
|
|
#else
|
|
if (addr & SECTION_SIZE)
|
|
pmd[1] = __pmd((pmd_val(pmd[1]) & mask) | prot);
|
|
else
|
|
pmd[0] = __pmd((pmd_val(pmd[0]) & mask) | prot);
|
|
#endif
|
|
flush_pmd_entry(pmd);
|
|
local_flush_tlb_kernel_range(addr, addr + SECTION_SIZE);
|
|
}
|
|
|
|
/* Make sure extended page tables are in use. */
|
|
static inline bool arch_has_strict_perms(void)
|
|
{
|
|
if (cpu_architecture() < CPU_ARCH_ARMv6)
|
|
return false;
|
|
|
|
return !!(get_cr() & CR_XP);
|
|
}
|
|
|
|
#define set_section_perms(perms, field) { \
|
|
size_t i; \
|
|
unsigned long addr; \
|
|
\
|
|
if (!arch_has_strict_perms()) \
|
|
return; \
|
|
\
|
|
for (i = 0; i < ARRAY_SIZE(perms); i++) { \
|
|
if (!IS_ALIGNED(perms[i].start, SECTION_SIZE) || \
|
|
!IS_ALIGNED(perms[i].end, SECTION_SIZE)) { \
|
|
pr_err("BUG: section %lx-%lx not aligned to %lx\n", \
|
|
perms[i].start, perms[i].end, \
|
|
SECTION_SIZE); \
|
|
continue; \
|
|
} \
|
|
\
|
|
for (addr = perms[i].start; \
|
|
addr < perms[i].end; \
|
|
addr += SECTION_SIZE) \
|
|
section_update(addr, perms[i].mask, \
|
|
perms[i].field); \
|
|
} \
|
|
}
|
|
|
|
static inline void fix_kernmem_perms(void)
|
|
{
|
|
set_section_perms(nx_perms, prot);
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_RODATA
|
|
void mark_rodata_ro(void)
|
|
{
|
|
set_section_perms(ro_perms, prot);
|
|
}
|
|
|
|
void set_kernel_text_rw(void)
|
|
{
|
|
set_section_perms(ro_perms, clear);
|
|
}
|
|
|
|
void set_kernel_text_ro(void)
|
|
{
|
|
set_section_perms(ro_perms, prot);
|
|
}
|
|
#endif /* CONFIG_DEBUG_RODATA */
|
|
|
|
#else
|
|
static inline void fix_kernmem_perms(void) { }
|
|
#endif /* CONFIG_ARM_KERNMEM_PERMS */
|
|
|
|
void free_tcmmem(void)
|
|
{
|
|
#ifdef CONFIG_HAVE_TCM
|
|
extern char __tcm_start, __tcm_end;
|
|
|
|
poison_init_mem(&__tcm_start, &__tcm_end - &__tcm_start);
|
|
free_reserved_area(&__tcm_start, &__tcm_end, -1, "TCM link");
|
|
#endif
|
|
}
|
|
|
|
void free_initmem(void)
|
|
{
|
|
fix_kernmem_perms();
|
|
free_tcmmem();
|
|
|
|
poison_init_mem(__init_begin, __init_end - __init_begin);
|
|
if (!machine_is_integrator() && !machine_is_cintegrator())
|
|
free_initmem_default(-1);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
static int keep_initrd;
|
|
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
if (!keep_initrd) {
|
|
if (start == initrd_start)
|
|
start = round_down(start, PAGE_SIZE);
|
|
if (end == initrd_end)
|
|
end = round_up(end, PAGE_SIZE);
|
|
|
|
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
|
|
free_reserved_area((void *)start, (void *)end, -1, "initrd");
|
|
}
|
|
}
|
|
|
|
static int __init keepinitrd_setup(char *__unused)
|
|
{
|
|
keep_initrd = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("keepinitrd", keepinitrd_setup);
|
|
#endif
|