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x86: Add generic EFI payload support 

It is possible to create a generic EFI payload for all x86 boards.
The payload is configured to include as many generic drivers as
possible. All stuff that touches low-level initialization are not
allowed as such is the EFI BIOS's responsibility. Platform specific
drivers (like gpio, spi, etc) are not included.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2018-06-12 08:36:18 -07:00
parent 3773c6a20a
commit 32151d4017
11 changed files with 216 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/dts/Makefile
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@ -11,6 +11,7 @@ dtb-y += bayleybay.dtb \
dfi-bt700-q7x-151.dtb \
edison.dtb \
efi.dtb \
efi-x86_payload.dtb \
galileo.dtb \
minnowmax.dtb \
qemu-x86_i440fx.dtb \

36
arch/x86/dts/efi-x86_payload.dts Normal file
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@ -0,0 +1,36 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*
* Generic EFI payload device tree for x86 targets
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/include/ "serial.dtsi"
/include/ "keyboard.dtsi"
/include/ "rtc.dtsi"
/include/ "tsc_timer.dtsi"
/ {
model = "EFI x86 Payload";
compatible = "efi,x86-payload";
aliases {
serial0 = &serial;
};
config {
silent_console = <0>;
};
chosen {
stdout-path = "/serial";
};
pci {
compatible = "pci-x86";
u-boot,dm-pre-reloc;
};
};

9
board/efi/Kconfig
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@ -12,8 +12,17 @@ config TARGET_EFI
takes over once the RAM, video and CPU are fully running.
U-Boot is loaded as an application from EFI.
config TARGET_EFI_PAYLOAD
bool "efi payload"
help
This target is used for running U-Boot on top of EFI. In
this case EFI does the early initialisation, and U-Boot
takes over once the RAM, video and CPU are fully running.
U-Boot is loaded as a payload from EFI.
endchoice
source "board/efi/efi-x86/Kconfig"
source "board/efi/efi-x86_payload/Kconfig"
endif

38
board/efi/efi-x86_payload/Kconfig Normal file
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@ -0,0 +1,38 @@
if TARGET_EFI_PAYLOAD
config SYS_BOARD
default "efi-x86_payload"
config SYS_VENDOR
default "efi"
config SYS_SOC
default "efi"
config SYS_CONFIG_NAME
default "efi-x86_payload"
config SYS_TEXT_BASE
default 0x00200000
config BOARD_SPECIFIC_OPTIONS # dummy
def_bool y
imply SYS_NS16550
imply SCSI
imply SCSI_AHCI
imply AHCI_PCI
imply MMC
imply MMC_PCI
imply MMC_SDHCI
imply MMC_SDHCI_SDMA
imply USB
imply USB_EHCI_HCD
imply USB_XHCI_HCD
imply USB_STORAGE
imply USB_KEYBOARD
imply E1000
imply ETH_DESIGNWARE
imply PCH_GBE
imply RTL8169
endif

7
board/efi/efi-x86_payload/MAINTAINERS Normal file
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@ -0,0 +1,7 @@
EFI-X86_PAYLOAD BOARD
M: Bin Meng <bmeng.cn@gmail.com>
S: Maintained
F: board/efi/efi-x86_payload/
F: include/configs/efi-x86_payload.h
F: configs/efi-x86_payload32_defconfig
F: configs/efi-x86_payload64_defconfig

5
board/efi/efi-x86_payload/Makefile Normal file
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@ -0,0 +1,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
# Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
obj-y += start.o

8
board/efi/efi-x86_payload/start.S Normal file
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@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*/
.globl early_board_init
early_board_init:
jmp early_board_init_ret

35
configs/efi-x86_payload32_defconfig Normal file
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@ -0,0 +1,35 @@
CONFIG_X86=y
CONFIG_VENDOR_EFI=y
CONFIG_DEFAULT_DEVICE_TREE="efi-x86_payload"
CONFIG_TARGET_EFI_PAYLOAD=y
CONFIG_FIT=y
CONFIG_FIT_SIGNATURE=y
CONFIG_USE_BOOTARGS=y
CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
CONFIG_SYS_CONSOLE_INFO_QUIET=y
CONFIG_DISPLAY_BOARDINFO_LATE=y
CONFIG_LAST_STAGE_INIT=y
CONFIG_HUSH_PARSER=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_IDE=y
CONFIG_CMD_MMC=y
CONFIG_CMD_PART=y
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_DHCP=y
# CONFIG_CMD_NFS is not set
CONFIG_CMD_PING=y
CONFIG_CMD_TIME=y
CONFIG_CMD_EXT2=y
CONFIG_CMD_EXT4=y
CONFIG_CMD_EXT4_WRITE=y
CONFIG_CMD_FAT=y
CONFIG_CMD_FS_GENERIC=y
CONFIG_MAC_PARTITION=y
CONFIG_ISO_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_REGMAP=y
CONFIG_SYSCON=y
# CONFIG_PCI_PNP is not set
CONFIG_EFI=y
CONFIG_EFI_STUB=y

36
configs/efi-x86_payload64_defconfig Normal file
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@ -0,0 +1,36 @@
CONFIG_X86=y
CONFIG_VENDOR_EFI=y
CONFIG_DEFAULT_DEVICE_TREE="efi-x86_payload"
CONFIG_TARGET_EFI_PAYLOAD=y
CONFIG_FIT=y
CONFIG_FIT_SIGNATURE=y
CONFIG_USE_BOOTARGS=y
CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
CONFIG_SYS_CONSOLE_INFO_QUIET=y
CONFIG_DISPLAY_BOARDINFO_LATE=y
CONFIG_LAST_STAGE_INIT=y
CONFIG_HUSH_PARSER=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_IDE=y
CONFIG_CMD_MMC=y
CONFIG_CMD_PART=y
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_DHCP=y
# CONFIG_CMD_NFS is not set
CONFIG_CMD_PING=y
CONFIG_CMD_TIME=y
CONFIG_CMD_EXT2=y
CONFIG_CMD_EXT4=y
CONFIG_CMD_EXT4_WRITE=y
CONFIG_CMD_FAT=y
CONFIG_CMD_FS_GENERIC=y
CONFIG_MAC_PARTITION=y
CONFIG_ISO_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_REGMAP=y
CONFIG_SYSCON=y
# CONFIG_PCI_PNP is not set
CONFIG_EFI=y
CONFIG_EFI_STUB=y
CONFIG_EFI_STUB_64BIT=y

19
doc/README.u-boot_on_efi
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@ -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
@ -241,6 +237,9 @@ arch/x86/cpu/efi
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

32
include/configs/efi-x86_payload.h Normal file
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@ -0,0 +1,32 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
*/
/*
* board/config.h - configuration options, board specific
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#include <configs/x86-common.h>
#define CONFIG_SYS_MONITOR_LEN (1 << 20)
#define CONFIG_STD_DEVICES_SETTINGS "stdin=serial,i8042-kbd\0" \
"stdout=serial,vidconsole\0" \
"stderr=serial,vidconsole\0"
/* ATA/IDE support */
#define CONFIG_SYS_IDE_MAXBUS 2
#define CONFIG_SYS_IDE_MAXDEVICE 4
#define CONFIG_SYS_ATA_BASE_ADDR 0
#define CONFIG_SYS_ATA_DATA_OFFSET 0
#define CONFIG_SYS_ATA_REG_OFFSET 0
#define CONFIG_SYS_ATA_ALT_OFFSET 0
#define CONFIG_SYS_ATA_IDE0_OFFSET 0x1f0
#define CONFIG_SYS_ATA_IDE1_OFFSET 0x170
#define CONFIG_ATAPI
#endif /* __CONFIG_H */