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authorBin Meng <bmeng.cn@gmail.com>2018-06-27 20:38:05 -0700
committerBin Meng <bmeng.cn@gmail.com>2018-07-02 09:23:28 +0800
commit73149164f4cd07051018f423cd8a47165eb8156b (patch)
treee433917332238380fcefc382862c928a9459f240 /doc
parent47cae019efb39c649015b3534344e50125e9f1d9 (diff)
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x86: doc: Update EFI loader support
CONFIG_EFI_LOADER is fully supported on x86 now. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'doc')
-rw-r--r--doc/README.x8629
1 files changed, 27 insertions, 2 deletions
diff --git a/doc/README.x86 b/doc/README.x86
index 9f657df..9162ea1 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -1136,9 +1136,34 @@ EFI Support
U-Boot supports booting as a 32-bit or 64-bit EFI payload, e.g. with UEFI.
This is enabled with CONFIG_EFI_STUB to boot from both 32-bit and 64-bit
UEFI BIOS. U-Boot can also run as an EFI application, with CONFIG_EFI_APP.
-The CONFIG_EFI_LOADER option, where U-Booot provides an EFI environment to
+The CONFIG_EFI_LOADER option, where U-Boot provides an EFI environment to
the kernel (i.e. replaces UEFI completely but provides the same EFI run-time
-services) is not currently supported on x86.
+services) is supported too. For example, we can even use 'bootefi' command
+to load a 'u-boot-payload.efi', see below test logs on QEMU.
+
+ => load ide 0 3000000 u-boot-payload.efi
+ 489787 bytes read in 138 ms (3.4 MiB/s)
+ => bootefi 3000000
+ Scanning disk ide.blk#0...
+ Found 2 disks
+ WARNING: booting without device tree
+ ## Starting EFI application at 03000000 ...
+ U-Boot EFI Payload
+
+
+ U-Boot 2018.07-rc2 (Jun 23 2018 - 17:12:58 +0800)
+
+ CPU: x86_64, vendor AMD, device 663h
+ DRAM: 2 GiB
+ MMC:
+ Video: 1024x768x32
+ Model: EFI x86 Payload
+ Net: e1000: 52:54:00:12:34:56
+
+ Warning: e1000#0 using MAC address from ROM
+ eth0: e1000#0
+ No controllers found
+ Hit any key to stop autoboot: 0
See README.u-boot_on_efi and README.uefi for details of EFI support in U-Boot.