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loongarch64: new target

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Add target for Loongson LoongArch64-based boards.

LoongArch is a new RISC ISA developed by Loongson. It's a bit like
MIPS or RISC-V. LoongArch includes both 32-bit and 64-bit versions
(LoongArch32/LoongArch64).

Loongson 3A5000 and 3A6000 are the two existing CPUs of LoongArch64
and is used for PC products. It's BIOS supports ACPI and UEFI-only
boot. These CPUs supports SMP and SMT.

At present only LoongArch64 is supported by linux kernel.

Toolchain requirement:
binutils >= 2.40
gcc >= 13.1

For details, please check the following links:
https://lwn.net/Articles/861951/
https://loongson.github.io/LoongArch-Documentation/README-EN.html

Signed-off-by: Weijie Gao <hackpascal@gmail.com>
This commit is contained in:
Weijie Gao
2024-01-07 03:10:45 +08:00
committed by Chuanhong Guo
parent 197d90dc31
commit 7fcb82665e
16 changed files with 1236 additions and 4 deletions
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5
include/target.mk
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@@ -264,6 +264,11 @@ ifeq ($(DUMP),1)
CPU_TYPE ?= riscv64
CPU_CFLAGS_riscv64:=-mabi=lp64d -march=rv64imafdc
endif
ifeq ($(ARCH),loongarch64)
CPU_TYPE ?= generic
CPU_CFLAGS := -O2 -pipe
CPU_CFLAGS_generic:=-march=loongarch64
endif
ifneq ($(CPU_TYPE),)
ifndef CPU_CFLAGS_$(CPU_TYPE)
$(warning CPU_TYPE "$(CPU_TYPE)" doesn't correspond to a known type)