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fix: add runtime services descs to usable memory types #32

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Merged
Alon-L merged 1 commit into from
Oct 4, 2025
Merged

fix: add runtime services descs to usable memory types #32

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11 changes: 6 additions & 5 deletions uefi/core_header_utils.c
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Original file line number Diff line number Diff line change
Expand Up @@ -59,13 +59,14 @@ static err_t fill_disk_pci(void) {
}

/**
* According to the UEFI specs (table 7.6 in section 7.2), all of the following memory types can be used
* by the OS as RAM after full initialization.
* A whitelist of memory descriptor types which will be stored and switched by core.
* They represent descriptors that the OS uses. These either include descriptor types that the OS can freely use as
* memory (see table 7.6 in section 7.2 of the UEFI specs), or descriptor types which the OS uses implicitly (such as
* runtime services).
*/
static const EFI_MEMORY_TYPE g_usable_memory_types[] = {
EfiLoaderCode, EfiLoaderData, EfiBootServicesCode, EfiBootServicesData,
EfiConventionalMemory, EfiACPIReclaimMemory, EfiPersistentMemory,
};
EfiLoaderCode, EfiLoaderData, EfiBootServicesCode, EfiBootServicesData, EfiConventionalMemory,
EfiACPIReclaimMemory, EfiPersistentMemory, EfiRuntimeServicesCode, EfiRuntimeServicesData};

/**
* Returns whether a given memory descriptor can be used by the OS as RAM.
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