Add support for the QEMU 'virt' machine on the m68k architecture. The QEMU virt machine models a generic system based on the Motorola 68040 CPU and utilizes Goldfish virtual peripherals.
Currently, U-Boot's m68k architecture support focuses on ColdFire variants. Expand this to include the classic M680x0 architecture, implementing the necessary exception vectors, startup code, and a bootinfo parser compatible with the QEMU interface. A driver for the Goldfish TTY is also added to enable serial console output. The implementation has been verified on QEMU targeting the M68040 CPU, confirming successful hardware initialization and boot to the U-Boot command shell. Kuan-Wei Chiu (3): serial: Add Goldfish TTY driver m68k: Add support for M68040 CPU board: Add QEMU m68k virt board support MAINTAINERS | 6 ++ arch/m68k/Kconfig | 23 ++++++ arch/m68k/Makefile | 1 + arch/m68k/config.mk | 10 ++- arch/m68k/cpu/m68040/Makefile | 6 ++ arch/m68k/cpu/m68040/cpu.c | 77 ++++++++++++++++++ arch/m68k/cpu/m68040/start.S | 83 +++++++++++++++++++ arch/m68k/cpu/m68040/u-boot.lds | 47 +++++++++++ arch/m68k/include/asm/bootinfo.h | 31 +++++++ arch/m68k/lib/Makefile | 9 +-- board/emulation/qemu-m68k/Kconfig | 12 +++ board/emulation/qemu-m68k/MAINTAINERS | 10 +++ board/emulation/qemu-m68k/Makefile | 5 ++ board/emulation/qemu-m68k/qemu-m68k.c | 84 +++++++++++++++++++ configs/qemu-m68k_defconfig | 17 ++++ doc/board/emulation/qemu-m68k.rst | 38 +++++++++ drivers/serial/Kconfig | 8 ++ drivers/serial/Makefile | 1 + drivers/serial/serial_goldfish.c | 112 ++++++++++++++++++++++++++ include/configs/qemu-m68k.h | 18 +++++ include/goldfish_tty.h | 18 +++++ 21 files changed, 608 insertions(+), 8 deletions(-) create mode 100644 arch/m68k/cpu/m68040/Makefile create mode 100644 arch/m68k/cpu/m68040/cpu.c create mode 100644 arch/m68k/cpu/m68040/start.S create mode 100644 arch/m68k/cpu/m68040/u-boot.lds create mode 100644 arch/m68k/include/asm/bootinfo.h create mode 100644 board/emulation/qemu-m68k/Kconfig create mode 100644 board/emulation/qemu-m68k/MAINTAINERS create mode 100644 board/emulation/qemu-m68k/Makefile create mode 100644 board/emulation/qemu-m68k/qemu-m68k.c create mode 100644 configs/qemu-m68k_defconfig create mode 100644 doc/board/emulation/qemu-m68k.rst create mode 100644 drivers/serial/serial_goldfish.c create mode 100644 include/configs/qemu-m68k.h create mode 100644 include/goldfish_tty.h -- 2.52.0.322.g1dd061c0dc-goog
