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efi: Add a function to obtain the memory type as a string

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It is sometimes useful to display the memory type in logs, etc. Add a
function to convert it to a string, which is more user-friendly than a
number.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-08-12 10:33:25 -06:00
parent 02e141912b
commit d07934b67e
2 changed files with 14 additions and 5 deletions
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7
include/efi.h
View File

@@ -745,6 +745,13 @@ static inline bool efi_mem_is_boot_services(int type)
type == EFI_BOOT_SERVICES_DATA;
}
/**
* efi_mem_type_name() - Get the name of a memory type
*
* Return: Name, or "<invalid>" if the type is not known
*/
const char *efi_mem_type_name(enum efi_memory_type type);
/**
* efi_dump_mem_table() - Dump out the EFI memory map
*

12
lib/efi/memory.c
View File

@@ -58,6 +58,11 @@ static struct attr_info {
{ EFI_MEMORY_RUNTIME, "needs runtime mapping" }
};
const char *efi_mem_type_name(enum efi_memory_type type)
{
return type < ARRAY_SIZE(type_name) ? type_name[type] : "<invalid>";
}
void efi_dump_mem_table(struct efi_mem_desc *desc, int size, int desc_size,
bool skip_bs)
{
@@ -76,7 +81,6 @@ void efi_dump_mem_table(struct efi_mem_desc *desc, int size, int desc_size,
addr = 0;
for (upto = 0; desc < end;
upto++, desc = efi_get_next_mem_desc(desc, desc_size)) {
const char *name;
u64 size;
if (skip_bs && efi_mem_is_boot_services(desc->type))
@@ -87,11 +91,9 @@ void efi_dump_mem_table(struct efi_mem_desc *desc, int size, int desc_size,
}
size = desc->num_pages << EFI_PAGE_SHIFT;
name = desc->type < ARRAY_SIZE(type_name) ?
type_name[desc->type] : "<invalid>";
printf("%2d %x:%-12s %010llx %010llx %010llx ", upto,
desc->type, name, desc->physical_start,
desc->virtual_start, size);
desc->type, efi_mem_type_name(desc->type),
desc->physical_start, desc->virtual_start, size);
if (desc->attribute & EFI_MEMORY_RUNTIME)
putc('r');
printf("%llx", desc->attribute & ~EFI_MEMORY_RUNTIME);