x86: Add generic EFI payload support

[u-boot] / doc / README.u-boot_on_efi

diff --git a/doc/README.u-boot_on_efi b/doc/README.u-boot_on_efi
index d5903c7bd3be54e0cef9546ea7b033ffaee91f2c..8fba112e116626ea67c279330ef3d50cf7015421 100644 (file)
--- a/doc/README.u-boot_on_efi
+++ b/doc/README.u-boot_on_efi
@@ -71,12 +71,13 @@ Just build U-Boot as normal, e.g.
    make efi-x86_defconfig
    make
 
-To build U-Boot as an EFI payload (32-bit or 64-bit EFI can be used), adjust an
-existing config (like qemu-x86_defconfig) to enable CONFIG_EFI, CONFIG_EFI_STUB
-and either CONFIG_EFI_STUB_32BIT or CONFIG_EFI_STUB_64BIT. All of these are
-boolean Kconfig options. Then build U-Boot as normal, e.g.
+To build U-Boot as an EFI payload (32-bit or 64-bit EFI can be used), enable
+CONFIG_EFI, CONFIG_EFI_STUB, and select either CONFIG_EFI_STUB_32BIT or
+CONFIG_EFI_STUB_64BIT. The efi-x86_payload configs (efi-x86_payload32_defconfig
+and efi-x86_payload32_defconfig) are set up for this. Then build U-Boot as
+normal, e.g.
 
-   make qemu-x86_defconfig
+   make efi-x86_payload32_defconfig (or efi-x86_payload64_defconfig)
    make
 
 You will end up with one of these files depending on what you build for:
@@ -211,11 +212,6 @@ Future work
 -----------
 This work could be extended in a number of ways:
 
-- Add a generic x86 EFI payload configuration. At present you need to modify
-an existing one, but mostly the low-level x86 code is disabled when booting
-on EFI anyway, so a generic 'EFI' board could be created with a suitable set
-of drivers enabled.
-
 - Add ARM support
 
 - Add 64-bit application support
@@ -235,16 +231,15 @@ Where is the code?
 lib/efi
        payload stub, application, support code. Mostly arch-neutral
 
-arch/x86/lib/efi
-       helper functions for the fake DRAM init, etc. These can be used by
-       any board that runs as a payload.
-
 arch/x86/cpu/efi
-       x86 support code for running as an EFI application
+       x86 support code for running as an EFI application and payload
 
 board/efi/efi-x86/efi.c
        x86 board code for running as an EFI application
 
+board/efi/efi-x86_payload
+       generic x86 EFI payload board support code
+
 common/cmd_efi.c
        the 'efi' command