diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2018-08-10 02:39:33 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2018-08-20 13:52:06 +0800 |
| commit | ceeee8f7b5f10d7736840b169249e891da0f6a47 (patch) | |
| tree | 0d4e059b4cf53c67d1fca1d7fd1404c6bc347759 /doc/README.x86 | |
| parent | 6ace36e19a8cfdd16ce7c02625edf36864897bf5 (diff) | |
x86: coreboot: Add generic coreboot payload support
Currently building U-Boot as the coreboot payload requires user
to change the build configuration for a specific board during
menuconfig process. This uses the board's native device tree
to configure the hardware. For example, the device tree provides
PCI address range for the PCI host controller and U-Boot will
re-program all PCI devices' BAR to be within this range. In order
to make sure we don't mess up the hardware, we should guarantee
the range matches what coreboot programs the chipset.
But we really should make the coreboot payload support easier.
Just like EFI payload, we can create a generic coreboot payload
for all x86 boards as well. 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 coreboot's
responsibility. Platform specific drivers (like gpio, spi, etc)
are not included.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Diffstat (limited to 'doc/README.x86')
| -rw-r--r-- | doc/README.x86 | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/doc/README.x86 b/doc/README.x86 index 9162ea17d8..6015ca4011 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -47,21 +47,6 @@ on other architectures, like below: $ make coreboot_defconfig $ make all -Note this default configuration will build a U-Boot payload for the QEMU board. -To build a coreboot payload against another board, you can change the build -configuration during the 'make menuconfig' process. - -x86 architecture ---> - ... - (qemu-x86) Board configuration file - (qemu-x86_i440fx) Board Device Tree Source (dts) file - (0x01920000) Board specific Cache-As-RAM (CAR) address - (0x4000) Board specific Cache-As-RAM (CAR) size - -Change the 'Board configuration file' and 'Board Device Tree Source (dts) file' -to point to a new board. You can also change the Cache-As-RAM (CAR) related -settings here if the default values do not fit your new board. - Build Instructions for U-Boot as main bootloader ------------------------------------------------ |