Add initial RISC-V architecture support

Antony Pavlov barebox 3 versions Apr 15, 2018 – Dec 18, 2018 In review

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v3 Latest Dec 18, 201810 patches 7 repliesIn review
v2 Jun 28, 201812 patches 5 repliesSuperseded
v1 Apr 15, 201810 patches 4 repliesSuperseded

Changes in v3 from the cover letter

(http://lists.infradead.org/pipermail/barebox/2018-June/033879.html)

* eliminate arch/riscv/boards/erizo-generic;
* use obj-dtb-y to include the dtb;
* simplify barebox.lds.S (see http://lists.infradead.org/pipermail/barebox/2018-June/033901.html);
* add SPDX-License-Identifier;
* rebase over latest master.

Patches in v3 No applies recorded yet

#	Subject and files	Size	Replies
1/10	Add initial RISC-V architecture support`arch/riscv/Kconfig` `arch/riscv/Makefile` `arch/riscv/boot/Makefile` +25 more	+582 -1	0 replies
2/10	RISC-V: add Erizo SoC support`arch/riscv/Kconfig` `arch/riscv/Makefile` `arch/riscv/dts/Makefile` +4 more	+89 -0	0 replies
3/10	RISC-V: add low-level debug macros for ns16550`arch/riscv/include/asm/debug_ll_ns16550.h`	+182 -0	1 reply
4/10	RISC-V: add nmon nano-monitor`arch/riscv/Kconfig` `arch/riscv/boot/start.S` `arch/riscv/include/asm/riscv_nmon.h`	+266 -0	0 replies
5/10	RISC-V: erizo: add DEBUG_LL support`arch/riscv/Kconfig` `arch/riscv/mach-erizo/include/mach/debug_ll.h`	+34 -0	0 replies
6/10	RISC-V: erizo: enable nmon`arch/riscv/Kconfig`	+1 -0	0 replies
7/10	RISC-V: erizo: add nmon image creation`arch/riscv/Makefile` `scripts/erizo-nmon-image`	+21 -0	0 replies
8/10	RISC-V: add erizo_generic_defconfig`arch/riscv/configs/erizo_generic_defconfig`	+51 -0	0 replies
9/10	scripts: add nmon-loader`scripts/nmon-loader`	+31 -0	3 replies
10/10	Documentation: add RISC-V docs`Documentation/boards/riscv.rst`	+91 -0	0 replies

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Read the v3 thread

Cover letter [PATCH v3 00/10] Add initial RISC-V architecture support

This patchseries adds initial RISC-V architecture support for barebox.

See Documentation/boards/riscv.rst for instructions.

You can obtain this patchseries from github:

    $ git clone -b 20181218.riscv https://github.com/frantony/barebox

Changes since PATCH v2 (20180628)
(http://lists.infradead.org/pipermail/barebox/2018-June/033879.html)

Changes since PATCH v1 (20170415)
(http://lists.infradead.org/pipermail/barebox/2018-April/032647.html)

* drop skeleton.dtsi;
* drop SPI GPIO bindings for erizo_generic;
* improve erizo-nmon-image;
* generic linker script is dropped;
* use generic GCC library routines from lib.

Changes since RFC v4 (20170927)
(http://lists.infradead.org/pipermail/barebox/2017-September/031226.html)

* drop 64-bit support;
* sync with RISC-V linux;
* RISC-V in barebox now is little endian only;
* fix according to notes by Oleksij Rempel.

Changes since RFC v3 (20161212)
(http://lists.infradead.org/pipermail/barebox/2016-December/028716.html)

* drop SiFive support, add support for custom Erizo SoC;
* barebox runs on real hardware (e.g. DE0-Nano FPGA board, see https://github.com/miet-riscv-workgroup/rv32-simple-soc for
details);
* introduce NMON for RISC-V;
* add relocator to start.S.

Changes since RFC v2 (20161113)
(http://lists.infradead.org/pipermail/barebox/2016-November/028533.html):

* add RV32 support.

Changes since RFC v1 (20161013)
(http://lists.infradead.org/pipermail/barebox/2016-October/028309.html):

* drop spike pk support;
* add qemu-sifive board support;
* add Documentation/boards/riscv.rst;
* fix guard macro names.

Antony Pavlov (10):
Add initial RISC-V architecture support
RISC-V: add Erizo SoC support
RISC-V: add low-level debug macros for ns16550
RISC-V: add nmon nano-monitor
RISC-V: erizo: add DEBUG_LL support
RISC-V: erizo: enable nmon
RISC-V: erizo: add nmon image creation
RISC-V: add erizo_generic_defconfig
scripts: add nmon-loader
Documentation: add RISC-V docs

 Documentation/boards/riscv.rst                |  91 +++++++
 arch/riscv/Kconfig                            |  91 +++++++
 arch/riscv/Makefile                           |  67 +++++
 arch/riscv/boot/Makefile                      |   3 +
 arch/riscv/boot/dtb.c                         |  37 +++
 arch/riscv/boot/main_entry.c                  |  35 +++
 arch/riscv/boot/start.S                       |  68 +++++
 arch/riscv/configs/erizo_generic_defconfig    |  51 ++++
 arch/riscv/dts/.gitignore                     |   1 +
 arch/riscv/dts/Makefile                       |  13 +
 arch/riscv/dts/erizo-generic.dts              |  14 ++
 arch/riscv/dts/erizo.dtsi                     |  46 ++++
 arch/riscv/include/asm/barebox.h              |   1 +
 arch/riscv/include/asm/bitops.h               |  32 +++
 arch/riscv/include/asm/bitsperlong.h          |  10 +
 arch/riscv/include/asm/byteorder.h            |   6 +
 arch/riscv/include/asm/common.h               |   6 +
 arch/riscv/include/asm/debug_ll_ns16550.h     | 182 ++++++++++++++
 arch/riscv/include/asm/elf.h                  |  11 +
 arch/riscv/include/asm/io.h                   |   8 +
 arch/riscv/include/asm/mmu.h                  |   6 +
 arch/riscv/include/asm/posix_types.h          |   1 +
 arch/riscv/include/asm/riscv_nmon.h           | 234 ++++++++++++++++++
 arch/riscv/include/asm/sections.h             |   1 +
 arch/riscv/include/asm/string.h               |   1 +
 arch/riscv/include/asm/swab.h                 |   6 +
 arch/riscv/include/asm/types.h                |  60 +++++
 arch/riscv/include/asm/unaligned.h            |  19 ++
 arch/riscv/lib/.gitignore                     |   1 +
 arch/riscv/lib/Makefile                       |   3 +
 arch/riscv/lib/asm-offsets.c                  |  12 +
 arch/riscv/lib/barebox.lds.S                  |  79 ++++++
 arch/riscv/lib/riscv_timer.c                  |  63 +++++
 arch/riscv/mach-erizo/Kconfig                 |  11 +
 arch/riscv/mach-erizo/Makefile                |   3 +
 arch/riscv/mach-erizo/include/mach/debug_ll.h |  33 +++
 drivers/of/Kconfig                            |   2 +-
 scripts/erizo-nmon-image                      |  10 +
 scripts/nmon-loader                           |  31 +++
 39 files changed, 1348 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/boards/riscv.rst
 create mode 100644 arch/riscv/Kconfig
 create mode 100644 arch/riscv/Makefile
 create mode 100644 arch/riscv/boot/Makefile
 create mode 100644 arch/riscv/boot/dtb.c
 create mode 100644 arch/riscv/boot/main_entry.c
 create mode 100644 arch/riscv/boot/start.S
 create mode 100644 arch/riscv/configs/erizo_generic_defconfig
 create mode 100644 arch/riscv/dts/.gitignore
 create mode 100644 arch/riscv/dts/Makefile
 create mode 100644 arch/riscv/dts/erizo-generic.dts
 create mode 100644 arch/riscv/dts/erizo.dtsi
 create mode 100644 arch/riscv/include/asm/barebox.h
 create mode 100644 arch/riscv/include/asm/bitops.h
 create mode 100644 arch/riscv/include/asm/bitsperlong.h
 create mode 100644 arch/riscv/include/asm/byteorder.h
 create mode 100644 arch/riscv/include/asm/common.h
 create mode 100644 arch/riscv/include/asm/debug_ll_ns16550.h
 create mode 100644 arch/riscv/include/asm/elf.h
 create mode 100644 arch/riscv/include/asm/io.h
 create mode 100644 arch/riscv/include/asm/mmu.h
 create mode 100644 arch/riscv/include/asm/posix_types.h
 create mode 100644 arch/riscv/include/asm/riscv_nmon.h
 create mode 100644 arch/riscv/include/asm/sections.h
 create mode 100644 arch/riscv/include/asm/string.h
 create mode 100644 arch/riscv/include/asm/swab.h
 create mode 100644 arch/riscv/include/asm/types.h
 create mode 100644 arch/riscv/include/asm/unaligned.h
 create mode 100644 arch/riscv/lib/.gitignore
 create mode 100644 arch/riscv/lib/Makefile
 create mode 100644 arch/riscv/lib/asm-offsets.c
 create mode 100644 arch/riscv/lib/barebox.lds.S
 create mode 100644 arch/riscv/lib/riscv_timer.c
 create mode 100644 arch/riscv/mach-erizo/Kconfig
 create mode 100644 arch/riscv/mach-erizo/Makefile
 create mode 100644 arch/riscv/mach-erizo/include/mach/debug_ll.h
 create mode 100755 scripts/erizo-nmon-image
 create mode 100755 scripts/nmon-loader

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