[PATCH v2 00/20] RISC-V: rework for PBL, VIRT and 64-Bit support

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

With these changes applied, barebox can now generate images that can
be booted on qemu/tinyemu virt32 and virt64 machines.

The boards have clocksource, virtio, cfi-flash,  reboot and poweroff
support.

This can also be pulled from Github:
https://github.com/a3f/barebox/tree/multi-image-riscv-v2

v1 -> v2:
 - moved compressed dtb helpers into common header for both ARM and
   RISC-V to use
 - relocate_to_adr(fixed_base) can now be called multiple times in a row
 - removed some extra spaces (Antony)
 - as arch is DT only, bumped pr_debug to pr_err if dt is not found.
   no panic, because with debug_ll you might still be able to boot to shell
   for further debugging
 - rename Makefile.erizo to Makefile.riscv. Let's just build all board images
   out of the same Makefile now
 - HAS_ARCH_SJLJ selected for 64-bit as well
 - don't require compiler to support atomics or floating point on rv64 (Rouven)
 - added RISCV timer for SBI and rdcycle mode. This is used on tinyemu virt.
   rdcycle mode could be used on erizo as well if suitable timerbase chosen.
 - activate first console because Tinyemu only describes virtio mmio region
   for console and no stdout-path

Cheers,
Ahmad Fatoum (18):
  partitions: don't allocate dma capable memory
  images: make BOARD_ARM_GENERIC_DT available for other arches
  ARM: make ARM_USE_COMPRESSED_DTB available for other arches
  ARM: aarch64: ommit unused label in assembly
  serial: virtio-console: depend on, but don't select VIRTIO
  filetype: detect RISC-V Linux kernel image
  asm: unaligned: don't do unaligned accesses
  RISC-V: debug_ll: ns16550: align C access size with assembly's
  RISC-V: drop duplicate or unneeded cflags
  RISC-V: add cacheless HAS_DMA support
  RISC-V: erizo: move to arch/riscv/boards/erizo
  RISC-V: import Linux' optimized string functions
  RISC-V: implement PBL and relocation support
  RISC-V: erizo: migrate to PBL
  RISC-V: support symbol names in barebox image
  RISC-V: add generic DT image
  clocksource: add driver for RISC-V and CLINT timers
  power: reset: add drivers for generic syscon reset and poweroff

Rouven Czerwinski (2):
  RISC-V: add 64-bit support
  RISC-V: add Qemu virt support

 Documentation/boards/riscv.rst               |  72 ++++++-
 Makefile                                     |   1 +
 arch/arm/Kconfig                             |   7 +-
 arch/arm/cpu/start.c                         |  20 +-
 arch/arm/include/asm/barebox-arm.h           |   7 -
 arch/arm/lib64/runtime-offset.S              |   2 +-
 arch/riscv/Kconfig                           |  81 +++++--
 arch/riscv/Makefile                          |  35 ++-
 arch/riscv/boards/Makefile                   |   2 +
 arch/riscv/boards/erizo/Makefile             |   3 +
 arch/riscv/boards/erizo/lowlevel.c           |  18 ++
 arch/riscv/boot/Makefile                     |   5 +-
 arch/riscv/boot/board-dt-2nd-entry.S         |  26 +++
 arch/riscv/boot/board-dt-2nd.c               |  29 +++
 arch/riscv/boot/dtb.c                        |  25 ---
 arch/riscv/boot/entry.c                      |  33 +++
 arch/riscv/boot/entry.h                      |  15 ++
 arch/riscv/boot/entry_ll.S                   |  15 ++
 arch/riscv/boot/main_entry.c                 |  35 ---
 arch/riscv/boot/start.S                      |  68 ------
 arch/riscv/boot/start.c                      | 185 ++++++++++++++++
 arch/riscv/boot/uncompress.c                 |  74 +++++++
 arch/riscv/configs/erizo_generic_defconfig   |   5 -
 arch/riscv/configs/virt32_defconfig          | 116 ++++++++++
 arch/riscv/configs/virt64_defconfig          | 117 ++++++++++
 arch/riscv/cpu/Makefile                      |   3 +
 arch/riscv/cpu/core.c                        |  50 +++++
 arch/riscv/cpu/time.c                        |  38 ++++
 arch/riscv/dts/Makefile                      |   9 +-
 arch/riscv/dts/erizo.dtsi                    |   2 +-
 arch/riscv/include/asm/barebox-riscv.h       |  94 +++++++++
 arch/riscv/include/asm/common.h              |  10 +-
 arch/riscv/include/asm/csr.h                 | 211 +++++++++++++++++++
 arch/riscv/include/asm/debug_ll_ns16550.h    |  16 +-
 arch/riscv/include/asm/dma.h                 |  44 ++++
 arch/riscv/include/asm/elf.h                 |   8 +-
 arch/riscv/include/asm/image.h               |  65 ++++++
 arch/riscv/include/asm/linkage.h             |   4 +
 arch/riscv/include/asm/sbi.h                 | 153 ++++++++++++++
 arch/riscv/include/asm/sections.h            |  15 ++
 arch/riscv/include/asm/string.h              |  21 +-
 arch/riscv/include/asm/timer.h               |   9 +
 arch/riscv/include/asm/types.h               |   8 +-
 arch/riscv/include/asm/unaligned.h           |  16 +-
 arch/riscv/lib/Makefile                      |   6 +-
 arch/riscv/lib/barebox.lds.S                 |  55 +++--
 arch/riscv/lib/dtb.c                         |  30 +++
 arch/riscv/lib/memcpy.S                      | 108 ++++++++++
 arch/riscv/lib/memmove.S                     |  64 ++++++
 arch/riscv/lib/memset.S                      | 113 ++++++++++
 arch/riscv/lib/pbl.lds.S                     |  85 ++++++++
 arch/riscv/lib/reloc.c                       |  64 ++++++
 arch/riscv/lib/runtime-offset.S              |  12 ++
 arch/riscv/lib/sections.c                    |   9 +
 arch/riscv/lib/setupc.S                      |  55 +++++
 arch/riscv/mach-virt/Makefile                |   3 +
 arch/riscv/mach-virt/include/mach/debug_ll.h |  25 +++
 common/Kconfig                               |   8 +-
 common/filetype.c                            |   3 +
 common/partitions.c                          |   5 +-
 common/partitions/dos.c                      |   7 +-
 common/partitions/efi.c                      |   1 -
 drivers/clocksource/Kconfig                  |  15 ++
 drivers/clocksource/Makefile                 |   2 +
 drivers/clocksource/timer-clint.c            |  93 ++++++++
 drivers/clocksource/timer-riscv.c            |  66 ++++++
 drivers/power/reset/Kconfig                  |  14 ++
 drivers/power/reset/Makefile                 |   2 +
 drivers/power/reset/syscon-poweroff.c        |  76 +++++++
 drivers/power/reset/syscon-reboot.c          |  92 ++++++++
 drivers/serial/Kconfig                       |   2 +-
 images/Makefile                              |   8 +-
 images/Makefile.riscv                        |  12 ++
 include/compressed-dtb.h                     |  33 +++
 include/dma.h                                |   1 +
 include/filetype.h                           |   1 +
 pbl/Kconfig                                  |   6 +-
 scripts/.gitignore                           |   1 +
 scripts/Makefile                             |   1 +
 scripts/Makefile.lib                         |  11 +
 scripts/prelink-riscv.c                      | 122 +++++++++++
 scripts/prelink-riscv.inc                    | 123 +++++++++++
 82 files changed, 2837 insertions(+), 269 deletions(-)
 create mode 100644 arch/riscv/boards/Makefile
 create mode 100644 arch/riscv/boards/erizo/Makefile
 create mode 100644 arch/riscv/boards/erizo/lowlevel.c
 create mode 100644 arch/riscv/boot/board-dt-2nd-entry.S
 create mode 100644 arch/riscv/boot/board-dt-2nd.c
 delete mode 100644 arch/riscv/boot/dtb.c
 create mode 100644 arch/riscv/boot/entry.c
 create mode 100644 arch/riscv/boot/entry.h
 create mode 100644 arch/riscv/boot/entry_ll.S
 delete mode 100644 arch/riscv/boot/main_entry.c
 delete mode 100644 arch/riscv/boot/start.S
 create mode 100644 arch/riscv/boot/start.c
 create mode 100644 arch/riscv/boot/uncompress.c
 create mode 100644 arch/riscv/configs/virt32_defconfig
 create mode 100644 arch/riscv/configs/virt64_defconfig
 create mode 100644 arch/riscv/cpu/Makefile
 create mode 100644 arch/riscv/cpu/core.c
 create mode 100644 arch/riscv/cpu/time.c
 create mode 100644 arch/riscv/include/asm/barebox-riscv.h
 create mode 100644 arch/riscv/include/asm/csr.h
 create mode 100644 arch/riscv/include/asm/dma.h
 create mode 100644 arch/riscv/include/asm/image.h
 create mode 100644 arch/riscv/include/asm/sbi.h
 create mode 100644 arch/riscv/include/asm/timer.h
 create mode 100644 arch/riscv/lib/dtb.c
 create mode 100644 arch/riscv/lib/memcpy.S
 create mode 100644 arch/riscv/lib/memmove.S
 create mode 100644 arch/riscv/lib/memset.S
 create mode 100644 arch/riscv/lib/pbl.lds.S
 create mode 100644 arch/riscv/lib/reloc.c
 create mode 100644 arch/riscv/lib/runtime-offset.S
 create mode 100644 arch/riscv/lib/sections.c
 create mode 100644 arch/riscv/lib/setupc.S
 create mode 100644 arch/riscv/mach-virt/Makefile
 create mode 100644 arch/riscv/mach-virt/include/mach/debug_ll.h
 create mode 100644 drivers/clocksource/timer-clint.c
 create mode 100644 drivers/clocksource/timer-riscv.c
 create mode 100644 drivers/power/reset/syscon-poweroff.c
 create mode 100644 drivers/power/reset/syscon-reboot.c
 create mode 100644 images/Makefile.riscv
 create mode 100644 include/compressed-dtb.h
 create mode 100644 scripts/prelink-riscv.c
 create mode 100644 scripts/prelink-riscv.inc

-- 
2.29.2


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