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This patch series includes general fixes and cleanup for RISC-V. It also adds support for booting Linux on qemu-riscv. At the moment, only single-core systems are supported. Support for multi-core systems will be added with a future patch series.

To boot Linux on qemu-riscv, Linux must be compiled into BBL as a payload. BBL must be included in a FIT image and supplied to QEMU with the -kernel parameter. Its location in memory is embedded in the device tree, which QEMU passes to u-boot. To test this, QEMU and riscv-pk (BBL) must be modified. QEMU is modified to add support for loading binary files (FIT images in this case) in addition to ELF files. riscv-pk must be modified to adjust the link address. A pull request for QEMU, which implements this, is available at [1]. A modified version of riscv-pk is available at [2].

This series applies on top of u-boot-dm/next.

Hi Lukas

Apply on top of u-boot-dm/next is ok. But apply on u-boot.git will have some conflicts.

Applying: riscv: qemu: use device tree passed by prior boot stage error: patch failed: board/emulation/qemu-riscv/qemu-riscv.c:9 error: board/emulation/qemu-riscv/qemu-riscv.c: patch does not apply Patch failed at 0001 riscv: qemu: use device tree passed by prior boot stage

May I ask which tree do you want to merge into mainline ? from dm tree or riscv tree ? So the merge of patch work can go smoothly.

Thanks

Rick

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Changes in v3:

• New patch to add VirtIO distro boot command
• New patch to enable distro boot on qemu-riscv32/64
• Adapt code and commit message to distro boot
• Replace printf with debug
• Clarify debug messages if no chosen node is found

Changes in v2:

• Replace the description of RISCV_ISA_C with that of the Linux kernel, as

suggested by Bin Meng

• Change ISA string construction, as suggested by Bin Meng
• Remove 0-padding in the format string to avoid printing 16 digits on RV32I

systems

• New patch to replace patch "riscv: remove CONFIG_INIT_CRITICAL"
• Drop removal of code that stores the contents of a2; this broke the board

ax25-ae350. The code will be removed again in a future patch.

• Rebase onto u-boot-dm/next
• Rebase onto u-boot-dm/next
• Move prototype location to match the location of the function in ofnode.c
• Rebase onto u-boot-dm/next
• Boot Linux with the device tree provided by the prior boot stage
• New patch

Bin Meng (1): Drop CONFIG_INIT_CRITICAL

Lukas Auer (27): tools: .gitignore: add prelink-riscv dts: riscv: update makefile to also clean the RISC-V dts directory riscv: rename CPU_RISCV_32/64 to match architecture names ARCH_RV32I/64I riscv: select CONFIG_PHYS_64BIT on RV64I systems riscv: add Kconfig entries for the C and A ISA extensions riscv: set -march and -mabi based on the Kconfig configuration riscv: enable -fdata-sections riscv: fix use of incorrectly sized variables riscv: make use of the barrier functions from Linux riscv: do not reimplement generic io functions riscv: complete the list of exception codes riscv: treat undefined exception codes as reserved riscv: hang on unhandled exceptions riscv: implement the invalidate_icache_* functions riscv: fix inconsistent use of spaces and tabs in start.S riscv: align mtvec on a 4-byte boundary riscv: remove unused labels in start.S riscv: do not blindly modify the mstatus CSR riscv: save hart ID and device tree passed by prior boot stage riscv: qemu: use device tree passed by prior boot stage riscv: qemu: support booting Linux riscv: align bootm implementation with that of other architectures distro_bootcmd: add VirtIO distro boot command riscv: qemu: enable distro boot dm: core: add missing prototype for ofnode_read_u64 riscv: qemu: detect and boot the kernel passed by QEMU riscv: qemu: clear kernel-start/-end in device tree as workaround for BBL

arch/nds32/cpu/n1213/start.S | 51 ---- arch/riscv/Kconfig | 28 +- arch/riscv/Makefile | 20 ++ arch/riscv/config.mk | 7 +- arch/riscv/cpu/cpu.c | 6 + arch/riscv/cpu/start.S | 342 ++++++++++++------------ arch/riscv/include/asm/barrier.h | 67 +++++ arch/riscv/include/asm/io.h | 48 +--- arch/riscv/include/asm/posix_types.h | 6 +- arch/riscv/include/asm/types.h | 4 + arch/riscv/lib/bootm.c | 97 +++++-- arch/riscv/lib/cache.c | 10 + arch/riscv/lib/interrupts.c | 31 ++- arch/riscv/lib/setjmp.S | 2 +- board/armltd/integrator/README | 4 +- board/emulation/qemu-riscv/Kconfig | 2 + board/emulation/qemu-riscv/qemu-riscv.c | 73 ++++- configs/ax25-ae350_defconfig | 2 +- configs/qemu-riscv32_defconfig | 5 +- configs/qemu-riscv64_defconfig | 7 +- doc/README.distro | 3 +- dts/Makefile | 2 +- include/common.h | 5 - include/config_distro_bootcmd.h | 21 +- include/configs/qemu-riscv.h | 28 ++ include/dm/ofnode.h | 10 + scripts/config_whitelist.txt | 1 - tools/.gitignore | 1 + 28 files changed, 538 insertions(+), 345 deletions(-) create mode 100644 arch/riscv/include/asm/barrier.h

-- 2.17.2