150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* Copyright (c) 2011 - 2021, Intel Corporation
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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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#include "boot.h"
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EFI_STATUS
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emalloc_reserved_aligned(EFI_PHYSICAL_ADDRESS *addr, UINTN size, UINTN align,
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EFI_PHYSICAL_ADDRESS minaddr, EFI_PHYSICAL_ADDRESS maxaddr)
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{
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struct efi_memmap_info mmap_info;
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UINTN msize, desc_sz, desc_addr, pages;
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EFI_MEMORY_DESCRIPTOR *mbuf;
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EFI_STATUS err;
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pages = EFI_SIZE_TO_PAGES(size);
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/* Memory map may change so we request it again */
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err = get_efi_memmap(&mmap_info, 0);
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if (err != EFI_SUCCESS)
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goto fail;
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msize = mmap_info.map_size;
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desc_sz = mmap_info.desc_size;
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mbuf = mmap_info.mmap;
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/* ACRN requests for lowest possible address that's greater than minaddr */
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/* TODO: in the future we may want to support both preferences */
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for (desc_addr = (UINTN)mbuf; desc_addr <= (UINTN)mbuf + msize - desc_sz; desc_addr += desc_sz) {
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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*)desc_addr;
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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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/* 1MB low memory is allocated only if required/requested */
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if ((end <= MEM_ADDR_1MB) && (maxaddr > MEM_ADDR_1MB))
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continue;
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/* starting allocation from 1M above unless requested */
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if ((start < MEM_ADDR_1MB) && (maxaddr > MEM_ADDR_1MB)) {
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start = MEM_ADDR_1MB;
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}
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/* zero page won't be allocated */
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if (start < 4096) {
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start = 4096;
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}
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if (start < minaddr) {
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start = minaddr;
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}
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start = (start + align - 1) & ~(align - 1);
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/* Since this routine is called during booting, memory block is large
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* enought, the reduction of memory size for memory alignment won't
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* impact allocation. It is true in most cases. if it is not true, loop
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* again
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*/
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if ((start + size <= end) && (start + size <= maxaddr)) {
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err = allocate_pages(AllocateAddress, EfiReservedMemoryType, pages, &start);
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if (err == EFI_SUCCESS) {
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*addr = start;
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break;
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}
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}
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}
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if (desc_addr > (UINTN)mbuf + msize - desc_sz) {
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err = EFI_OUT_OF_RESOURCES;
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}
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free_pool(mbuf);
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fail:
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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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