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openwrt/target/linux/malta
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Aleksander Jan Bajkowski 9226f1e419
kernel: disable CONFIG_CPU_LITTLE_ENDIAN in generic config 
Endianness depends on CPU architecture. CONFIG_CPU_(BIG/LITTLE)_ENDIAN should
be enabled on target or subtarget based on SoC architecture.

Fixes warning:
$ make kernel_oldconfig CONFIG_TARGET=subtarget
...
.config:1008:warning: override: CPU_LITTLE_ENDIAN changes choice state
....

Summary:
- ARC - only the CONFIG_CPU_BIG_ENDIAN symbol is defined for this architeture.
  If it is disabled then the processor operates in LITTLE_ENDIAN mode (default),
- ARM32 - CONFIG_CPU_LITTLE_ENDIAN symbol available since kernel 5.19. This
  option should be enabled after OpenWRT moves to kernel 6.x. After refreshing
  the kernel, the symbol disappears,
- ARM64 - enabled CONFIG_CPU_LITTLE_ENDIAN,
- MIPS - enabled relevant symbols,
- POWERPC -  enabled CONFIG_CPU_BIG_ENDIAN,
- UML - Symbols are not defined for this architecture,
- X86 - always little endian. Symbols are not defined for this architecture.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
2022-10-21 13:47:01 +02:00
..
base-files/etc malta: use default OpenWrt network configuration 2022-05-28 17:35:34 +02:00
be kernel: disable CONFIG_CPU_LITTLE_ENDIAN in generic config 2022-10-21 13:47:01 +02:00
be64 kernel: disable CONFIG_CPU_LITTLE_ENDIAN in generic config 2022-10-21 13:47:01 +02:00
image target: use SPDX license identifiers on Makefiles 2021-02-10 15:47:18 +01:00
le malta: prune subtarget configs 2021-03-17 15:35:33 +01:00
le64 malta: prune subtarget configs 2021-03-17 15:35:33 +01:00
config-5.10 kernel: Activate CONFIG_INPUT_MISC on all targets 2022-08-10 21:36:17 +02:00
config-5.15 kernel: Activate CONFIG_INPUT_MISC on all targets 2022-08-10 21:36:17 +02:00
Makefile malta: make 5.15 kernel default 2022-09-14 16:45:06 +02:00
README malta: update MIPS64 ISA to R2 2020-10-11 16:16:24 +02:00

README 

This Malta target is intended to be used with the Qemu emulator. It can be used
to prototype an OpenWrt firmware for MIPS processors. One could also use it to
troubleshoot MIPS applications without access to real hardware.

To use the images built by OpenWrt with qemu, use the following commands:

For the 32 bit little-endian image:
qemu-system-mipsel -kernel bin/targets/malta/le/openwrt-malta-le-vmlinux-initramfs.elf -nographic -m 256

For the 32 bit big-endian image:
qemu-system-mips -kernel bin/targets/malta/be/openwrt-malta-be-vmlinux-initramfs.elf -nographic -m 256

For the 64 bit little-endian image:
qemu-system-mips64el -kernel bin/targets/malta/le64/openwrt-malta-le64-vmlinux-initramfs.elf -cpu MIPS64R2-generic -nographic -m 256

For the 64 bit big-endian image:
qemu-system-mips64 -kernel bin/targets/malta/be64/openwrt-malta-be64-vmlinux-initramfs.elf -cpu MIPS64R2-generic -nographic -m 256

and enjoy the system bootin.