From: Wang Dongsheng dongsheng.wang@freescale.com
Bootrom will put cpus into WFE state when boot cpu release cpus, so target cpu cannot correctly go to spin state.
Add 'sev' to wakeup non-boot cpu that hold on bootrom space, let target cpu can fall into u-boot spin table.
Signed-off-by: Wang Dongsheng dongsheng.wang@freescale.com
diff --git a/arch/arm/cpu/armv7/ls102xa/cpu.c b/arch/arm/cpu/armv7/ls102xa/cpu.c index 75f0d8c..1f82893 100644 --- a/arch/arm/cpu/armv7/ls102xa/cpu.c +++ b/arch/arm/cpu/armv7/ls102xa/cpu.c @@ -344,5 +344,13 @@ void smp_kick_all_cpus(void) struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
out_be32(&gur->brrl, 0x2); + + /* + * LS1 STANDBYWFE is not captured outside the ARM module in the soc. + * So add a delay to wait bootrom execute WFE. + */ + udelay(1); + + asm volatile("sev"); } #endif