In theory U-Boot built for coreboot is supposed to run as a payload to be loaded by coreboot on every board that coreboot supports. The U-Boot build process uses SYS_CONFIG_NAME and DEFAULT_DEVICE_TREE which are hardcoded in board defconfig and Kconfig files. For better support of coreboot, we want to make these two options configurable so that we can easily change them during 'make menuconfig' so that the generated U-Boot image for coreboot is board configuration aware.
Note v2/v3/v4 patch series aims to better support coreboot, while v1 patch series just tried to resolve the issues seen on qemu. Several issues are fixed to make coreboot support in U-Boot more robust.
See v1 patch discussion @ http://lists.denx.de/pipermail/u-boot/2015-January/200140.html
The official qemu U-Boot support will come in the future. This patch series have been tested with coreboot running on qemu and Intel Crown Bay (my own unofficiall simple port, not in coreboot mainline) then loading the U-Boot built with the new mechanism.
Changes in v4: - Rebase to u-boot-x86/next
Changes in v3: - Make coreboot options wrapped by TARGET_COREBOOT - Remove these options from include/configs/coreboot.h for bisectability - Move CONFIG_VIDEO_X86 to drivers/video/Kconfig - Fix several typos in README.x86
Changes in v2: - Fix the CONFIG_COLLECT_TIMESTAMPS typo in the comment block and commit message - Spell out TSC, MSR and PIT in the Kconfig help - New patch to move CONFIG_X86_RESET_VECTOR and CONFIG_SYS_X86_START16 to Kconfig - New patch to hide ROM chip size when CONFIG_X86_RESET_VECTOR is not selected - New patch to make SYS_CONFIG_NAME and DEFAULT_DEVICE_TREE configurable - New patch to move coreboot specific defines from coreboot.h to Kconfig - New patch to move CONFIG_SYS_CAR_xxx to Kconfig - New patch to remove include/configs/coreboot.h - New patch to make chromebook_link the default board for coreboot - Leave CROS_EC defines unchanged in coreboot.h - New patch to configure pci memory regions - New patch to update REAME.x86 for coreboot support
Bin Meng (12): x86: coreboot: Set up timer base correctly x86: Allow a hardcoded TSC frequency provided by Kconfig x86: Move CONFIG_X86_RESET_VECTOR and CONFIG_SYS_X86_START16 to Kconfig x86: Hide ROM chip size when CONFIG_X86_RESET_VECTOR is not selected x86: coreboot: Make SYS_CONFIG_NAME and DEFAULT_DEVICE_TREE configurable x86: coreboot: Move coreboot-specific defines from coreboot.h to Kconfig x86: Move CONFIG_SYS_CAR_xxx to Kconfig x86: Remove include/configs/coreboot.h x86: Make chromebook_link the default board for coreboot x86: coreboot: Wrap cros_ec initialization x86: coreboot: Configure pci memory regions x86: Update README.x86 for coreboot support
arch/x86/Kconfig | 32 ++++++ arch/x86/cpu/coreboot/Kconfig | 15 +++ arch/x86/cpu/coreboot/pci.c | 30 ++++- arch/x86/cpu/coreboot/timestamp.c | 33 +++--- arch/x86/dts/Makefile | 3 +- arch/x86/dts/chromebook_link.dts | 217 ++++++++++++++++++++++++++++++++++- arch/x86/dts/link.dts | 216 ---------------------------------- arch/x86/lib/tsc_timer.c | 8 +- board/coreboot/coreboot/Kconfig | 27 ++++- board/coreboot/coreboot/MAINTAINERS | 2 +- board/coreboot/coreboot/coreboot.c | 2 + board/google/chromebook_link/Kconfig | 9 ++ board/intel/crownbay/Kconfig | 1 + configs/chromebook_link_defconfig | 1 + configs/coreboot-x86_defconfig | 1 - doc/README.x86 | 39 ++++++- drivers/video/Kconfig | 8 ++ include/configs/chromebook_link.h | 7 +- include/configs/coreboot.h | 75 ------------ include/configs/crownbay.h | 2 - 20 files changed, 405 insertions(+), 323 deletions(-) create mode 100644 arch/x86/cpu/coreboot/Kconfig mode change 120000 => 100644 arch/x86/dts/chromebook_link.dts delete mode 100644 arch/x86/dts/link.dts delete mode 100644 include/configs/coreboot.h