From 476476e73b14696563524cbc2627a4c033ea64da Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 4 Aug 2015 12:33:52 -0600 Subject: efi: Add support for loading U-Boot through an EFI stub It is useful to be able to load U-Boot onto a board even if is it already running EFI. This can allow access to the U-Boot command interface, flexible booting options and easier development. The easiest way to do this is to build U-Boot as a binary blob and have an EFI stub copy it into RAM. Add support for this feature, targeting 32-bit initially. Also add a way to detect when U-Boot has been loaded via a stub. This goes in common.h since it needs to be widely available so that we avoid redoing initialisation that should be skipped. Signed-off-by: Simon Glass Improvements to how the payload is built: Signed-off-by: Bin Meng Reviewed-by: Bin Meng Tested-by: Bin Meng --- include/efi.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/efi.h') diff --git a/include/efi.h b/include/efi.h index f009701..1470c08 100644 --- a/include/efi.h +++ b/include/efi.h @@ -268,11 +268,15 @@ struct efi_priv { /* Base address of the EFI image */ extern char image_base[]; +/* Start and end of U-Boot image (for payload) */ +extern char _binary_u_boot_dtb_bin_start[], _binary_u_boot_dtb_bin_end[]; + /** * efi_get_sys_table() - Get access to the main EFI system table * * @return pointer to EFI system table */ + struct efi_system_table *efi_get_sys_table(void); /** -- cgit v1.1