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EFI: Implement heap

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This commit is contained in:
Jessica Hamilton 2016-04-21 13:04:28 +12:00
parent e2e1558a02
commit c0002a79e7
1 changed files with 20 additions and 2 deletions
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22
src/system/boot/platform/efi/heap.cpp
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@ -7,16 +7,34 @@
#include <boot/platform.h>
#include <boot/stage2.h>
#include "efi_platform.h"
#define STAGE_PAGES 0x2000 /* 32 MB */
static EFI_PHYSICAL_ADDRESS staging;
extern "C" void
platform_release_heap(struct stage2_args *args, void *base)
{
return;
if ((void*)staging != base)
panic("Attempt to release heap with wrong base address!");
kBootServices->FreePages(staging, STAGE_PAGES);
}
extern "C" status_t
platform_init_heap(struct stage2_args *args, void **_base, void **_top)
{
return B_ERROR;
if (kBootServices->AllocatePages(AllocateAnyPages, EfiLoaderData,
STAGE_PAGES, &staging) != EFI_SUCCESS)
return B_NO_MEMORY;
*_base = (void*)staging;
*_top = (void*)((int8*)staging + STAGE_PAGES * PAGE_SIZE);
return B_OK;
}