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Diffstat (limited to 'drivers/arm/gic/v3/gic-x00.c')
-rw-r--r--drivers/arm/gic/v3/gic-x00.c72
1 files changed, 65 insertions, 7 deletions
diff --git a/drivers/arm/gic/v3/gic-x00.c b/drivers/arm/gic/v3/gic-x00.c
index 6e106babfb..83ef32f056 100644
--- a/drivers/arm/gic/v3/gic-x00.c
+++ b/drivers/arm/gic/v3/gic-x00.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@@ -16,15 +16,14 @@
#include <assert.h>
#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/arm/arm_gicv3_common.h>
#include <drivers/arm/gicv3.h>
#include "gicv3_private.h"
/* GIC-600 specific register offsets */
#define GICR_PWRR 0x24U
-#define IIDR_MODEL_ARM_GIC_600 U(0x0200043b)
-#define IIDR_MODEL_ARM_GIC_600AE U(0x0300043b)
-#define IIDR_MODEL_ARM_GIC_CLAYTON U(0x0400043b)
/* GICR_PWRR fields */
#define PWRR_RDPD_SHIFT 0
@@ -44,9 +43,11 @@
#define PWRR_ON (0U << PWRR_RDPD_SHIFT)
#define PWRR_OFF (1U << PWRR_RDPD_SHIFT)
+static bool gic600_errata_wa_2384374 __unused;
+
#if GICV3_SUPPORT_GIC600
-/* GIC-600/Clayton specific accessor functions */
+/* GIC-600/700 specific accessor functions */
static void gicr_write_pwrr(uintptr_t base, unsigned int val)
{
mmio_write_32(base + GICR_PWRR, val);
@@ -123,12 +124,12 @@ static bool gicv3_redists_need_power_mgmt(uintptr_t gicr_base)
uint32_t reg = mmio_read_32(gicr_base + GICR_IIDR);
/*
- * The Arm GIC-600 and GIC-Clayton models have their redistributors
+ * The Arm GIC-600 and GIC-700 models have their redistributors
* powered down at reset.
*/
return (((reg & IIDR_MODEL_MASK) == IIDR_MODEL_ARM_GIC_600) ||
((reg & IIDR_MODEL_MASK) == IIDR_MODEL_ARM_GIC_600AE) ||
- ((reg & IIDR_MODEL_MASK) == IIDR_MODEL_ARM_GIC_CLAYTON));
+ ((reg & IIDR_MODEL_MASK) == IIDR_MODEL_ARM_GIC_700));
}
#endif /* GICV3_SUPPORT_GIC600 */
@@ -172,3 +173,60 @@ void gicv3_rdistif_on(unsigned int proc_num)
}
#endif
}
+
+#if GIC600_ERRATA_WA_2384374
+/*******************************************************************************
+ * Apply part 2 of workaround for errata-2384374 as per SDEN:
+ * https://developer.arm.com/documentation/sden892601/latest/
+ ******************************************************************************/
+void gicv3_apply_errata_wa_2384374(uintptr_t gicr_base)
+{
+ if (gic600_errata_wa_2384374) {
+ uint32_t gicr_ctlr_val = gicr_read_ctlr(gicr_base);
+
+ gicr_write_ctlr(gicr_base, gicr_ctlr_val |
+ (GICR_CTLR_DPG0_BIT | GICR_CTLR_DPG1NS_BIT |
+ GICR_CTLR_DPG1S_BIT));
+ gicr_write_ctlr(gicr_base, gicr_ctlr_val &
+ ~(GICR_CTLR_DPG0_BIT | GICR_CTLR_DPG1NS_BIT |
+ GICR_CTLR_DPG1S_BIT));
+ }
+}
+#endif /* GIC600_ERRATA_WA_2384374 */
+
+void gicv3_check_erratas_applies(uintptr_t gicd_base)
+{
+ unsigned int gic_prod_id;
+ uint8_t gic_rev;
+
+ assert(gicd_base != 0UL);
+
+ gicv3_get_component_prodid_rev(gicd_base, &gic_prod_id, &gic_rev);
+
+ /*
+ * This workaround applicable only to GIC600 and GIC600AE products with
+ * revision less than r1p6 and r0p2 respectively.
+ * As per GIC600/GIC600AE specification -
+ * r1p6 = 0x17 => GICD_IIDR[19:12]
+ * r0p2 = 0x04 => GICD_IIDR[19:12]
+ */
+ if ((gic_prod_id == GIC_PRODUCT_ID_GIC600) ||
+ (gic_prod_id == GIC_PRODUCT_ID_GIC600AE)) {
+ if (((gic_prod_id == GIC_PRODUCT_ID_GIC600) &&
+ (gic_rev <= GIC_REV(GIC_VARIANT_R1, GIC_REV_P6))) ||
+ ((gic_prod_id == GIC_PRODUCT_ID_GIC600AE) &&
+ (gic_rev <= GIC_REV(GIC_VARIANT_R0, GIC_REV_P2)))) {
+#if GIC600_ERRATA_WA_2384374
+ gic600_errata_wa_2384374 = true;
+ VERBOSE("%s applies\n",
+ "GIC600/GIC600AE errata workaround 2384374");
+#else
+ WARN("%s missing\n",
+ "GIC600/GIC600AE errata workaround 2384374");
+#endif /* GIC600_ERRATA_WA_2384374 */
+ } else {
+ VERBOSE("%s not applies\n",
+ "GIC600/GIC600AE errata workaround 2384374");
+ }
+ }
+}