133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*
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* Copyright (c) 2011, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <efi.h>
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#include <efilib.h>
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#include "efilinux.h"
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#include "stdlib.h"
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/**
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* memory_map - Allocate and fill out an array of memory descriptors
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* @map_buf: buffer containing the memory map
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* @map_size: size of the buffer containing the memory map
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* @map_key: key for the current memory map
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* @desc_size: size of the desc
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* @desc_version: memory descriptor version
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*
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* On success, @map_size contains the size of the memory map pointed
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* to by @map_buf and @map_key, @desc_size and @desc_version are
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* updated.
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*/
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EFI_STATUS
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memory_map(EFI_MEMORY_DESCRIPTOR **map_buf, UINTN *map_size,
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UINTN *map_key, UINTN *desc_size, UINT32 *desc_version)
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{
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EFI_STATUS err;
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*map_size = sizeof(**map_buf) * 31;
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get_map:
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/*
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* Because we're about to allocate memory, we may
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* potentially create a new memory descriptor, thereby
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* increasing the size of the memory map. So increase
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* the buffer size by the size of one memory
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* descriptor, just in case.
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*/
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*map_size += sizeof(**map_buf);
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err = allocate_pool(EfiLoaderData, *map_size,
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(void **)map_buf);
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if (err != EFI_SUCCESS) {
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Print(L"Failed to allocate pool for memory map");
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goto failed;
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}
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err = get_memory_map(map_size, *map_buf, map_key,
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desc_size, desc_version);
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if (err != EFI_SUCCESS) {
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if (err == EFI_BUFFER_TOO_SMALL) {
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/*
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* 'map_size' has been updated to reflect the
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* required size of a map buffer.
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*/
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free_pool((void *)*map_buf);
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goto get_map;
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}
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Print(L"Failed to get memory map");
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goto failed;
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}
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failed:
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return err;
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}
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EFI_STATUS dump_e820(void)
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{
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UINTN map_size, map_key, desc_size;
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EFI_MEMORY_DESCRIPTOR *map_buf;
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UINTN d, map_end;
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UINTN i;
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UINT32 desc_version;
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EFI_STATUS err;
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err = memory_map(&map_buf, &map_size, &map_key,
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&desc_size, &desc_version);
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if (err != EFI_SUCCESS)
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goto fail;
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d = (UINTN)map_buf;
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map_end = (UINTN)map_buf + map_size;
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for (i = 0; d < map_end; d += desc_size, i++) {
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EFI_MEMORY_DESCRIPTOR *desc;
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EFI_PHYSICAL_ADDRESS start, end;
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desc = (EFI_MEMORY_DESCRIPTOR *)d;
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if (desc->Type != EfiConventionalMemory)
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continue;
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start = desc->PhysicalStart;
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end = start + (desc->NumberOfPages << EFI_PAGE_SHIFT);
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Print(L"[%d]start:%lx, end:%lx, type:%d\n", i, start, end, desc->Type);
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}
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free_pool(map_buf);
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fail:
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return err;
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}
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