I have been in trouble for a while to debug some nasty problem where neighter a debugger nor printf() function is available.
I found the lowlevel debug feature in ARM Linux can be used as is in U-Boot too. I tested this series on our SoCs (32bit ARM, specificly Coretex-A9). Because I was not sure about aarch64, I have this feature depend on "! ARM64". 1/6 and 2/6 refactor a bit and move CONFIG_ARM64 to Kconfig. 3/6 imports some source files from Linux 3.16 and 5/6 adds the Kconfig menu. Masahiro Yamada (6): vexpress64: kconfig: consolidate CONFIG_TARGET_VEXPRESS_AEMV8A_SEMI kconfig: armv8: move CONFIG_ARM64 to Kconfig arm: debug: import debug files from Linux 3.16 arm: debug: replace license blocks with SPDX arm: debug: add Kconfig entries for lowlevel debug arm: debug: adjust for U-Boot arch/arm/Kconfig | 13 +- arch/arm/Kconfig.debug | 64 ++++++ arch/arm/cpu/armv8/Kconfig | 7 + arch/arm/include/debug/8250.S | 52 +++++ arch/arm/lib/Makefile | 2 + arch/arm/lib/debug.S | 136 ++++++++++++ board/armltd/vexpress64/Kconfig | 24 -- board/freescale/ls2085a/Kconfig | 8 - configs/ls2085a_emu_D4_defconfig | 2 +- configs/ls2085a_emu_defconfig | 2 +- configs/ls2085a_simu_defconfig | 2 +- configs/vexpress_aemv8a_defconfig | 1 - configs/vexpress_aemv8a_semi_defconfig | 4 +- include/linux/serial_reg.h | 388 +++++++++++++++++++++++++++++++++ 14 files changed, 664 insertions(+), 41 deletions(-) create mode 100644 arch/arm/Kconfig.debug create mode 100644 arch/arm/cpu/armv8/Kconfig create mode 100644 arch/arm/include/debug/8250.S create mode 100644 arch/arm/lib/debug.S create mode 100644 include/linux/serial_reg.h -- 1.9.1 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
