mirrors/u-boot
0
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2024-11-27 14:14:37 +08:00
Code Issues Packages Projects Releases Wiki Activity

x86: efi_loader: Build EFI memory map per E820 table

Browse Source 
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.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2018-06-27 20:38:01 -07:00
parent 8199a145c4
commit abe47ca728
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
arch/x86/lib/e820.c
View File

@ -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) */