[PATCH 0/3] m68k: Add support for QEMU virt machine

[Kuan-Wei Chiu]

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

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2.52.0.322.g1dd061c0dc-goog