From 6f0586e692c91ac9dc33fd479f68c3d957bf61b3 Mon Sep 17 00:00:00 2001
From: Wang Dongsheng <dongsheng.wang@freescale.com>
Date: Thu, 18 Jun 2015 18:32:58 +0800
Subject: [PATCH] armv7/ls102xa: Fix non-boot cpus cannot correctly fall in
spin table
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>
Reviewed-by: York Sun <yorksun@freescale.com>
---
arch/arm/cpu/armv7/ls102xa/cpu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/cpu/armv7/ls102xa/cpu.c b/arch/arm/cpu/armv7/ls102xa/cpu.c
index 75f0d8c7f7..8dd95d9879 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
--
2.39.5