kernel/linux.git/arch/riscv/boot, branch linux-5.9.y

riscv: Fix Kendryte K210 device tree

2020-09-19T20:20:14+00:00

The Kendryte K210 SoC CLINT is compatible with Sifive clint v0 (sifive,clint0). Fix the Kendryte K210 device tree clint entry to be inline with the sifive timer definition documented in Documentation/devicetree/bindings/timer/sifive,clint.yaml. The device tree clint entry is renamed similarly to u-boot device tree definition to improve compatibility with u-boot defined device tree. To ensure correct initialization, the interrup-cells attribute is added and the interrupt-extended attribute definition fixed. This fixes boot failures with Kendryte K210 SoC boards. Note that the clock referenced is kept as K210_CLK_ACLK, which does not necessarilly match the clint MTIME increment rate. This however does not seem to cause any problem for now. Signed-off-by: Damien Le Moal Signed-off-by: Palmer Dabbelt

riscv: Allow building with kcov coverage

2020-07-30T18:37:35+00:00

Add ARCH_HAS_KCOV and HAVE_GCC_PLUGINS to the riscv Kconfig. Also disable instrumentation of some early boot code and vdso. Boot-tested on QEMU's riscv64 virt machine. Signed-off-by: Tobias Klauser Acked-by: Dmitry Vyukov Signed-off-by: Palmer Dabbelt

riscv: K210: Add a built-in device tree

2020-05-18T18:38:06+00:00

The K210's bootloader does not provide a device tree. Give the ability to providea builtin one with the SOC_KENDRYTE_K210_BUILTIN_DTB option. If selected, this option result in the definition of a builtin DTB entry in the k210 sysctl driver. If defined, the builtin DTB entry points to the default k210.dts device tree file and is keyed with the vendor ID 0x4B5, the arch ID 0xE59889E6A5A04149 ("Canaan AI" in UTF-8 coded Chinese) and the impl ID 0x4D41495832303030 ("MAIX200"). These values are reported by the SiPEED MAIXDUINO board, the SiPEED MAIX Go board and the SiPEED Dan Dock board. [Thanks to Damien for the K210 IDs] Signed-off-by: Damien Le Moal Signed-off-by: Palmer Dabbelt

Merge tag 'riscv-for-linus-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2020-04-09T17:51:30+00:00

Pull RISC-V updates from Palmer Dabbelt: "This contains a handful of new features: - Partial support for the Kendryte K210. There are still a few outstanding issues that I have patches for, but I don't actually have a board to test them so they're not included yet. - SBI v0.2 support. - Fixes to support for building with LLVM-based toolchains. The resulting images are known not to boot yet. I don't anticipate a part two, but I'll probably have something early in the RCs to finish up the K210 support" * tag 'riscv-for-linus-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (38 commits) riscv: create a loader.bin boot image for Kendryte SoC riscv: Kendryte K210 default config riscv: Add Kendryte K210 device tree riscv: Select required drivers for Kendryte SOC riscv: Add Kendryte K210 SoC support riscv: Add SOC early init support riscv: Unaligned load/store handling for M_MODE RISC-V: Support cpu hotplug RISC-V: Add supported for ordered booting method using HSM RISC-V: Add SBI HSM extension definitions RISC-V: Export SBI error to linux error mapping function RISC-V: Add cpu_ops and modify default booting method RISC-V: Move relocate and few other functions out of __init RISC-V: Implement new SBI v0.2 extensions RISC-V: Introduce a new config for SBI v0.1 RISC-V: Add SBI v0.2 extension definitions RISC-V: Add basic support for SBI v0.2 RISC-V: Mark existing SBI as 0.1 SBI. riscv: Use macro definition instead of magic number riscv: Add support to dump the kernel page tables ...

riscv: create a loader.bin boot image for Kendryte SoC

2020-04-03T17:50:17+00:00

Create the loader.bin bootable image file that can be loaded into Kendryte K210 based boards using the kflash.py tool with the command: kflash.py/kflash.py -t arch/riscv/boot/loader.bin Signed-off-by: Christoph Hellwig Signed-off-by: Damien Le Moal Reviewed-by: Anup Patel Reviewed-by: Palmer Dabbelt Signed-off-by: Palmer Dabbelt

riscv: Add Kendryte K210 device tree

2020-04-03T17:50:15+00:00

Add a generic device tree for Kendryte K210 SoC based boards. This is for now a very simple device tree describing the core elements of the SoC. This is suitable (and tested) for the Kendryte KD233 development board, the Sipeed MAIX M1 Dan Dock board and the Sipeed MAIXDUINO board. Signed-off-by: Damien Le Moal Reviewed-by: Sean Anderson Signed-off-by: Palmer Dabbelt

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48+00:00

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

riscv: dts: Add GPIO reboot method to HiFive Unleashed DTS file

2020-03-05T20:27:10+00:00

Add the ability to reboot the HiFive Unleashed board via GPIO. Signed-off-by: Yash Shah Reviewed-by: Anup Patel Signed-off-by: Palmer Dabbelt

riscv: Fix gitignore

2020-02-20T00:13:51+00:00

Tell git to not track the compiled boot/loader and boot/loader.lds files. Signed-off-by: Damien Le Moal Signed-off-by: Palmer Dabbelt

riscv: dts: Add DT support for SiFive FU540 GPIO driver

2020-01-29T14:58:08+00:00

Add the gpio DT node in SiFive FU540 soc-specific DT file. Enable the gpio node in HiFive Unleashed board-specific DT file. Signed-off-by: Yash Shah Signed-off-by: Palmer Dabbelt