Layerscape中的主题 Re: LS1043 GIC-400 initialization

LS1043 GIC-400 initialization

thehk — Mon, 31 Jul 2023 07:50:59 GMT

Hello everyone,

I tried to initialize GIC-400 on LS1043a. However, GIC-400 is not seeming as activated. My diagnose method is reading read-only distributor registers of GIC-400 such as GICD_IIDR. This register seems like giving some fixed value such as 0x0200143B. However, since i read this register in code it returns nothing but "0"(zero) value. The reason why i think that GIC is not powered on. Do you have any idea about the problem and it is solution?

Thank you for your interesting.

Re: LS1043 GIC-400 initialization

yipingwang — Thu, 03 Aug 2023 09:21:25 GMT

It is most likely because you are trying a non-Secure access to a secure-only register.

Refer to ARM GIC Architecture Specification, Section 1.2

Re: LS1043 GIC-400 initialization

thehk — Mon, 08 Jan 2024 10:35:31 GMT

I solved the problem, It is all about alignment problem of the GIC by selecting SCFG registers.