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/*
* Copyright (c) 2026, Apollo Telephone Laboratories.
* Provided under the BSD-3 clause.
*/
#include <sboot/memmap.h>
EFI_STATUS
SBootGetMemmap(OUT PLATFORM_MEMMAP *Map)
{
EFI_STATUS Status;
if (Map == NULL) {
return EFI_INVALID_PARAMETER;
}
Map->Map = NULL;
Map->MapSize = 0;
Map->MapKey = 0;
Map->DescriptorSize = 0;
Map->DescriptorVersion = 0;
Status = uefi_call_wrapper(
gBS->GetMemoryMap,
5,
&Map->MapSize,
Map->Map,
&Map->MapKey,
&Map->DescriptorSize,
&Map->DescriptorVersion
);
Map->Map = AllocatePool(Map->MapSize);
if (Map->Map == NULL) {
return EFI_OUT_OF_RESOURCES;
}
/*
* We have to call this twice as the act of allocating memory
* alters the memory map.
*/
for (UINTN Idx = 0; Idx < 2; ++Idx) {
Status = uefi_call_wrapper(
gBS->GetMemoryMap,
5,
&Map->MapSize,
Map->Map,
&Map->MapKey,
&Map->DescriptorSize,
&Map->DescriptorVersion
);
if (!EFI_ERROR(Status)) {
break;
}
}
if (EFI_ERROR(Status)) {
Print(L"fatal: failed to get memory map\n");
}
return EFI_SUCCESS;
}
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