On x86 traditional E820 table is used to pass the memory information
to kernel. With EFI loader we can build the EFI memory map from it.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
Changes in v3: None
Changes in v2: None
arch/x86/lib/e820.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/arch/x86/lib/e820.c b/arch/x86/lib/e820.c
index 9a9ec99..8b34f67 100644
--- a/arch/x86/lib/e820.c
+++ b/arch/x86/lib/e820.c
@@ -4,6 +4,7 @@
*/
#include <common.h>
+#include <efi_loader.h>
#include <asm/e820.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -34,3 +35,41 @@ __weak unsigned int install_e820_map(unsigned int
max_entries,
return 4;
}
+
+#if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
+void efi_add_known_memory(void)
+{
+ struct e820_entry e820[E820MAX];
+ unsigned int i, num;
+ u64 start, pages;
+ int type;
+
+ num = install_e820_map(ARRAY_SIZE(e820), e820);
+
+ for (i = 0; i < num; ++i) {
+ start = e820[i].addr;
+ pages = ALIGN(e820[i].size, EFI_PAGE_SIZE) >> EFI_PAGE_SHIFT;
+
+ switch (e820[i].type) {
+ case E820_RAM:
+ type = EFI_CONVENTIONAL_MEMORY;
+ break;
+ case E820_RESERVED:
+ type = EFI_RESERVED_MEMORY_TYPE;
+ break;
+ case E820_ACPI:
+ type = EFI_ACPI_RECLAIM_MEMORY;
+ break;
+ case E820_NVS:
+ type = EFI_ACPI_MEMORY_NVS;
+ break;
+ case E820_UNUSABLE:
+ default:
+ type = EFI_UNUSABLE_MEMORY;
+ break;
+ }
+
+ efi_add_memory_map(start, pages, type, false);
+ }
+}
+#endif /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
--
2.7.4
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