Hi all,
Sorry for flooding the mailing list recently, yet another huge RFC series ahead.
So after working on MIPS, arm64be and Xtensa I'm now on LoongArch, as suggested
by Heinrich.
So far this series has implemented general support for initializing CPU,
exceptions, kernel booting, CPU and timer drivers, QEMU LoongArch virt machine
support and UEFI standard compliant EFI booting support.
LoongArch had defined 3 ISA variants, LA64, LA32 and LA32R (Reduced, intended
for MCUs). Currently, only LA64 is implemented as 32bit support in open sourc
world is not mature yet. However, most of the code is written with 32 bit
support in mind, so it should be trivial to add 32 bit support in the future.
It is a little endian only architecture.
This series had passed checkpatch with exceptions on some false alarms and
headers imported elsewhere.
I had tested virtio devices, qfw direct kernel booting, efistub kernel
booting and grub.
Toolchain can be found at [1] or using upstream one, I had also discovered a
couple of issues in kernel and QEMU in the porting process, patches
at [2] and [3].
To build:
```
make qemu-loongarch64_defconfig
make
``
To run in QEMU (patched):
```
qemu-system-loongarch64 -nographic -machine virt -bios u-boot.bin
```
TODOs for me on this series:
- Documents
- I'll write board level document for QEMU,
what should I write at architecture level?
- MAINTAINERS entries
- I'm not sure what I should add here, please suggest!
- Further clean-ups
TODOs on the architecture & board:
- loongson,ls7a-rtc driver
- The only device on QEMU board haven't been supported yet
- LoongArch sandbox host support
- Implement LoongArch's PE relocations
- No application is using it so far,
pe-format spec is not really clear.
- TLB enablement
- This is required for real CPU to utilize caches
- Possibly EFI-APP support for real machine
Porting to real SoCs is out of my scope as a hobbyist, I'll try to
convince Loongson people or other hobbyists to work on that.
I intended to use U-Boot as an OVMF replacement and second stage BL.
Any comments are much appreciated!
Thanks
Signed-off-by: Jiaxun Yang <jiaxun.y...@flygoat.com>
---
Jiaxun Yang (16):
lib: fdtdec: Handle multiple memory nodes
linux/io.h: Use map_physmem to implement ioremap
image: Take entry point as an output of setup_booti
elf.h Define LoongArch bits
image: Define IH_ARCH_LOONGARCH
LoongArch: skeleton and headers
LoongArch: lib: General routines
LoongArch: CPU assembly routines
LoongArch: Exception handling
LoongArch: Boot Image bits
LoongArch: Generic CPU type
cpu: Add loongarch_cpu driver
timer: Add loongarch_timer driver
board: emulation: Add qemu-loongarch
efi: LoongArch: Define LoongArch bits everywhere
efi: LoongArch: Implement everything
arch/Kconfig | 15 +
arch/arm/lib/image.c | 3 +-
arch/loongarch/Kconfig | 49 +
arch/loongarch/Makefile | 19 +
arch/loongarch/config.mk | 27 +
arch/loongarch/cpu/Makefile | 9 +
arch/loongarch/cpu/cpu.c | 28 +
arch/loongarch/cpu/generic/Kconfig | 13 +
arch/loongarch/cpu/generic/Makefile | 7 +
arch/loongarch/cpu/generic/cpu.c | 22 +
arch/loongarch/cpu/generic/dram.c | 21 +
arch/loongarch/cpu/genex.S | 21 +
arch/loongarch/cpu/smp_secondary.S | 55 +
arch/loongarch/cpu/start.S | 169 +++
arch/loongarch/cpu/u-boot.lds | 85 ++
arch/loongarch/dts/Makefile | 13 +
arch/loongarch/dts/qemu-loongarch64.dts | 9 +
arch/loongarch/include/asm/acpi_table.h | 8 +
arch/loongarch/include/asm/addrspace.h | 87 ++
.../include/asm/arch-generic/entry-init.h | 15 +
arch/loongarch/include/asm/asm.h | 186 +++
arch/loongarch/include/asm/atomic.h | 12 +
arch/loongarch/include/asm/barrier.h | 138 ++
arch/loongarch/include/asm/bitops.h | 156 +++
arch/loongarch/include/asm/byteorder.h | 22 +
arch/loongarch/include/asm/cache.h | 24 +
arch/loongarch/include/asm/config.h | 11 +
arch/loongarch/include/asm/cpu.h | 123 ++
arch/loongarch/include/asm/dma-mapping.h | 27 +
arch/loongarch/include/asm/global_data.h | 43 +
arch/loongarch/include/asm/gpio.h | 11 +
arch/loongarch/include/asm/io.h | 399 ++++++
arch/loongarch/include/asm/linkage.h | 11 +
arch/loongarch/include/asm/loongarch.h | 1468 ++++++++++++++++++++
arch/loongarch/include/asm/posix_types.h | 87 ++
arch/loongarch/include/asm/processor.h | 11 +
arch/loongarch/include/asm/ptrace.h | 33 +
arch/loongarch/include/asm/regdef.h | 42 +
arch/loongarch/include/asm/sections.h | 8 +
arch/loongarch/include/asm/setjmp.h | 25 +
arch/loongarch/include/asm/spl.h | 11 +
arch/loongarch/include/asm/stackframe.h | 175 +++
arch/loongarch/include/asm/string.h | 11 +
arch/loongarch/include/asm/system.h | 74 +
arch/loongarch/include/asm/types.h | 37 +
arch/loongarch/include/asm/u-boot-loongarch.h | 23 +
arch/loongarch/include/asm/u-boot.h | 30 +
arch/loongarch/include/asm/unaligned.h | 11 +
arch/loongarch/lib/Makefile | 26 +
arch/loongarch/lib/asm-offsets.c | 66 +
arch/loongarch/lib/boot.c | 14 +
arch/loongarch/lib/bootm.c | 177 +++
arch/loongarch/lib/cache.c | 73 +
arch/loongarch/lib/crt0_loongarch_efi.S | 182 +++
arch/loongarch/lib/elf_loongarch_efi.lds | 76 +
arch/loongarch/lib/image.c | 66 +
arch/loongarch/lib/interrupts.c | 189 +++
arch/loongarch/lib/reloc_loongarch_efi.c | 107 ++
arch/loongarch/lib/reset.c | 14 +
arch/loongarch/lib/setjmp.S | 52 +
arch/riscv/lib/image.c | 4 +-
arch/sandbox/lib/bootm.c | 2 +-
board/emulation/qemu-loongarch/Kconfig | 68 +
board/emulation/qemu-loongarch/MAINTAINERS | 7 +
board/emulation/qemu-loongarch/Makefile | 6 +
board/emulation/qemu-loongarch/qemu-loongarch.c | 84 ++
board/emulation/qemu-loongarch/qemu-loongarch.env | 6 +
boot/bootm.c | 5 +-
boot/bootmeth_efi.c | 2 +
boot/image.c | 1 +
cmd/Kconfig | 2 +-
cmd/booti.c | 5 +-
common/spl/spl.c | 9 +-
configs/qemu-loongarch64_defconfig | 36 +
drivers/cpu/Kconfig | 6 +
drivers/cpu/Makefile | 1 +
drivers/cpu/loongarch_cpu.c | 148 ++
drivers/timer/Kconfig | 8 +
drivers/timer/Makefile | 1 +
drivers/timer/loongarch_timer.c | 112 ++
include/asm-generic/pe.h | 2 +
include/config_distro_bootcmd.h | 5 +
include/configs/qemu-loongarch.h | 13 +
include/efi_default_filename.h | 2 +
include/elf.h | 9 +-
include/image.h | 4 +-
include/linux/io.h | 3 +-
lib/efi_loader/Kconfig | 2 +-
lib/efi_loader/efi_image_loader.c | 7 +
lib/efi_loader/efi_runtime.c | 4 +
lib/efi_selftest/efi_selftest_miniapp_exception.c | 2 +
lib/fdtdec.c | 137 +-
92 files changed, 5559 insertions(+), 70 deletions(-)
---
base-commit: a7f0154c412859323396111dd0c09dbafbc153cb
change-id: 20240522-loongarch-8a04c1e34a47
Best regards,
--
Jiaxun Yang <jiaxun.y...@flygoat.com>
