From patchwork Wed Apr 8 18:57:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 237447 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Wed, 8 Apr 2020 12:57:48 -0600 Subject: [RESEND PATCH v3 0/7] x86: Improve support for chain-loading U-Boot Message-ID: <20200408185755.116336-1-sjg@chromium.org> This little series adds a few checks into the code to allow better operation when booting a build from a previous-state loader such as coreboot. At present we have a 'coreboot' target but this runs very different code from the bare-metal targets, such as coral. There is very little in common between them. It is useful to be able to boot the same U-Boot on a device, with or without a first-stage bootloader. For example, with chromebook_coral, it is helpful for testing to be able to boot the same U-Boot (complete with FSP) on bare metal and from coreboot. It allows checking of things like CPU speed, comparing registers, ACPI tables and the like. This series allows U-Boot to detect that it ran from coreboot and automatically do the right thing. This series makes the most important changes to allow the same u-boot.bin for coral to boot after coreboot (by itself) or bare metal (via TPL->SPL). Changes in v3: - Add a new patch with a gd flag for chain loading - Add new patch to detect running from coreboot Changes in v2: - Drop the other check in interrupt_init() which is not needed now - Drop patch 'dm: Avoid initing built-in devices when chain loading' Simon Glass (7): x86: fsp: Allow skipping init code when chain loading x86: apl: Skip init code when chain loading x86: cpu: Skip init code when chain loading pci: Avoid auto-config when chain loading board: Add a gd flag for chain loading x86: Add a way to detect running from coreboot x86: Use the existing stack when chain-loading arch/x86/cpu/apollolake/fsp_s.c | 2 ++ arch/x86/cpu/cpu.c | 4 +++- arch/x86/cpu/i386/cpu.c | 15 +++++++++++++++ arch/x86/cpu/i386/interrupt.c | 6 ++++-- arch/x86/cpu/start_from_spl.S | 16 ++++++++++++++-- arch/x86/include/asm/u-boot-x86.h | 7 +++++++ arch/x86/lib/fsp/fsp_dram.c | 8 ++++++++ arch/x86/lib/fsp/fsp_graphics.c | 3 +++ arch/x86/lib/fsp2/fsp_dram.c | 10 ++++++++++ arch/x86/lib/fsp2/fsp_init.c | 2 +- arch/x86/lib/init_helpers.c | 3 +++ drivers/pci/pci-uclass.c | 4 ++-- include/asm-generic/global_data.h | 1 + include/init.h | 2 +- 14 files changed, 74 insertions(+), 9 deletions(-)