armv8/ls1043a: Implement workaround for PEX erratum A009929
Consecutive write transactions from core to PCI express outbound
path hangs after 25 to 30 transactions depending on core freq.
This erratum enable the mbist clock through COP register setting.
Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index 984eaf9..23d6b73 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -197,6 +197,19 @@
}
#endif
+static void erratum_a009929(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009929
+ struct ccsr_gur *gur = (void *)CONFIG_SYS_FSL_GUTS_ADDR;
+ u32 __iomem *dcsr_cop_ccp = (void *)CONFIG_SYS_DCSR_COP_CCP_ADDR;
+ u32 rstrqmr1 = gur_in32(&gur->rstrqmr1);
+
+ rstrqmr1 |= 0x00000400;
+ gur_out32(&gur->rstrqmr1, rstrqmr1);
+ writel(0x01000000, dcsr_cop_ccp);
+#endif
+}
+
void fsl_lsch2_early_init_f(void)
{
struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
@@ -216,6 +229,9 @@
*/
out_le32(&cci->slave[4].snoop_ctrl,
CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
+
+ /* Erratum */
+ erratum_a009929();
}
#endif