Merge pull request #1833 from marex/arm/master/pci-v2.0.0

rcar_gen3: plat: Prevent PCIe hang during L1X config access

plat/renesas/rcar/platform.mk

@@ -13,6 +13,9 @@ GENERATE_COT			:= 1
 BL2_AT_EL3			:= 1
 ENABLE_SVE_FOR_NS		:= 0
 
+CRASH_REPORTING			:= 1
+HANDLE_EA_EL3_FIRST		:= 1
+
 $(eval $(call add_define,PLAT_EXTRA_LD_SCRIPT))
 
 ifeq (${SPD},none)
@@ -322,8 +325,8 @@ PLAT_INCLUDES	:=	-Idrivers/staging/renesas/rcar/ddr	\
 			-Iplat/renesas/rcar/include		\
 			-Iplat/renesas/rcar
 
-PLAT_BL_COMMON_SOURCES	:=	drivers/renesas/rcar/iic_dvfs/iic_dvfs.c
-
+PLAT_BL_COMMON_SOURCES	:=	drivers/renesas/rcar/iic_dvfs/iic_dvfs.c \
+				plat/renesas/rcar/rcar_common.c
 
 RCAR_GIC_SOURCES	:=	drivers/arm/gic/common/gic_common.c	\
 				drivers/arm/gic/v2/gicv2_main.c		\

plat/renesas/rcar/rcar_common.c

+/*
+ * Copyright (c) 2019, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <arch_helpers.h>
+#include <drivers/console.h>
+#include <lib/xlat_tables/xlat_mmu_helpers.h>
+#include <plat/common/platform.h>
+
+#include <lib/mmio.h>
+
+#define CPG_BASE		0xE6150000
+#define CPG_MSTPSR3		0x0048
+#define MSTP318			(1 << 18)
+#define MSTP319			(1 << 19)
+#define PMSR			0x5c
+#define PMSR_L1FAEG		(1 << 31)
+#define PMSR_PMEL1RX		(1 << 23)
+#define PMCTLR			0x60
+#define PMSR_L1IATN		(1 << 31)
+
+static int rcar_pcie_fixup(unsigned int controller)
+{
+	uint32_t rcar_pcie_base[] = { 0xfe011000, 0xee811000 };
+	uint32_t addr = rcar_pcie_base[controller];
+	uint32_t cpg, pmsr;
+	int ret = 0;
+
+	/* Test if PCIECx is enabled */
+	cpg = mmio_read_32(CPG_BASE + CPG_MSTPSR3);
+	if (cpg & (MSTP318 << !controller))
+		return ret;
+
+	pmsr = mmio_read_32(addr + PMSR);
+
+	if ((pmsr & PMSR_PMEL1RX) && ((pmsr & 0x70000) != 0x30000)) {
+		/* Fix applicable */
+		mmio_write_32(addr + PMCTLR, PMSR_L1IATN);
+		while (!(mmio_read_32(addr + PMSR) & PMSR_L1FAEG))
+			;
+		mmio_write_32(addr + PMSR, PMSR_L1FAEG | PMSR_PMEL1RX);
+		ret = 1;
+	}
+
+	return ret;
+}
+
+/* RAS functions common to AArch64 ARM platforms */
+void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
+		void *handle, uint64_t flags)
+{
+	unsigned int fixed = 0;
+
+	fixed |= rcar_pcie_fixup(0);
+	fixed |= rcar_pcie_fixup(1);
+
+	if (fixed)
+		return;
+
+	ERROR("Unhandled External Abort received on 0x%lx at EL3!\n",
+			read_mpidr_el1());
+	ERROR(" exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome);
+
+	panic();
+}