Re: [U-Boot] [PATCH] arm: re-implement proper ISB instruction for ARMv7-A

On Thu, Jul 28, 2016 at 06:13:26PM +0800, Ziyuan Xu wrote: `

For ARMv7-A architecture, the valid ISB instruction is asm volatile("isb").

This patch fixes the U-Boot was stuck in invalidate_dcache_all() before booting linux kernel, which occurred on rk3288-base development board such as evb-rk3288, rock2-rk3288. And something output via console like:

=> bootz 0x2000000 0x02000000 ramdisk start = 0x00000000, ramdisk end = 0x00000000 Continuing to boot without FDT Initial value for argc=3 Final value for argc=3 using: ATAGS

Starting kernel ...

Linux kernel exactly the same way(see arch/arm/include/asm/barrier.h).

Good catch!