On Wed, Dec 04, 2019 at 05:49:09PM +0800, Tim Williams wrote:

Hello, I am trying to port u-boot to a new board,

There are several macros, how to use them properly?

CONFIG_ARCH_XXX CONFIG_MACH_XXX CONFIG_TARGET_XXX

for example, my board has:

SoC: LS2K1000 ISA: MIPS32r1, MIPS32r2, MIPS64r1, MIPS64r2 Board: UselessRouter or HelloRouter, TBD NIC: 4 1000Mbps NIC(No built in switcher)

Code that is generic to LS2K1000 but not your boards should use CONFIG_SOC_xxx and everything board-specific should be CONFIG_TARGET_xxx. CONFIG_ARCH_xxx / CONFIG_MACH_xxx should get used likely sparingly, but we are indeed inconsistent and could use CONFIG_SOC_xxx in some of those cases.