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Manually attempt to allocate all conventional memory early #78

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14 changes: 11 additions & 3 deletions src/csmwrap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -98,14 +98,22 @@ EFI_STATUS efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
gBS = SystemTable->BootServices;
gRT = SystemTable->RuntimeServices;

printf("%s", banner);

for (uintptr_t i = 0; i < 0x100000; i += EFI_PAGE_SIZE) {
uintptr_t j = i;
if (gBS->AllocatePages(AllocateAddress, EfiLoaderData, 1, &j) != EFI_SUCCESS) {
if (i < 0xa0000) {
printf("warning: Early AllocatePages() failed for address %p\n", i);
}
}
}

if (gRT->GetTime(&gTimeAtBoot, NULL) != EFI_SUCCESS) {
printf("Failed to query current time\n");
return -1;
}

printf("%s", banner);

gBS->RaiseTPL(TPL_NOTIFY);
gBS->SetWatchdogTimer(0, 0, 0, NULL);

if (unlock_bios_region()) {
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