TF-A GICv3 driver: Separate GICD and GICR accessor functions
This patch provides separation of GICD, GICR accessor
functions and adds new macros for GICv3 registers access
as a preparation for GICv3.1 and GICv4 support.
NOTE: Platforms need to modify to include both
'gicdv3_helpers.c' and 'gicrv3_helpers.c' instead of the
single helper file previously.
Change-Id: I1641bd6d217d6eb7d1228be3c4177b2d556da60a
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/drivers/arm/gic/v3/gicrv3_helpers.c b/drivers/arm/gic/v3/gicrv3_helpers.c
new file mode 100644
index 0000000..294acda
--- /dev/null
+++ b/drivers/arm/gic/v3/gicrv3_helpers.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2015-2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <common/interrupt_props.h>
+#include <drivers/arm/gicv3.h>
+#include "gicv3_private.h"
+
+/*******************************************************************************
+ * GIC Redistributor functions
+ * Note: The raw register values correspond to multiple interrupt IDs and
+ * the number of interrupt IDs involved depends on the register accessed.
+ ******************************************************************************/
+
+/*
+ * Accessor to read the GIC Redistributor IPRIORITYR corresponding to the
+ * interrupt `id`, 4 interrupts IDs at a time.
+ */
+unsigned int gicr_read_ipriorityr(uintptr_t base, unsigned int id)
+{
+ unsigned int n = id >> IPRIORITYR_SHIFT;
+
+ return mmio_read_32(base + GICR_IPRIORITYR + (n << 2));
+}
+
+/*
+ * Accessor to write the GIC Redistributor IPRIORITYR corresponding to the
+ * interrupt `id`, 4 interrupts IDs at a time.
+ */
+void gicr_write_ipriorityr(uintptr_t base, unsigned int id, unsigned int val)
+{
+ unsigned int n = id >> IPRIORITYR_SHIFT;
+
+ mmio_write_32(base + GICR_IPRIORITYR + (n << 2), val);
+}
+
+/*
+ * Accessor to set the byte corresponding to interrupt ID
+ * in GIC Redistributor IPRIORITYR.
+ */
+void gicr_set_ipriorityr(uintptr_t base, unsigned int id, unsigned int pri)
+{
+ GICR_WRITE_8(IPRIORITYR, base, id, pri & GIC_PRI_MASK);
+}
+
+/*
+ * Accessor to get the bit corresponding to interrupt ID
+ * from GIC Redistributor IGROUPR0.
+ */
+unsigned int gicr_get_igroupr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igroupr0(base);
+
+ return (reg_val >> bit_num) & 0x1U;
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID
+ * in GIC Redistributor IGROUPR0.
+ */
+void gicr_set_igroupr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igroupr0(base);
+
+ gicr_write_igroupr0(base, reg_val | (1U << bit_num));
+}
+
+/*
+ * Accessor to clear the bit corresponding to interrupt ID
+ * in GIC Redistributor IGROUPR0.
+ */
+void gicr_clr_igroupr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igroupr0(base);
+
+ gicr_write_igroupr0(base, reg_val & ~(1U << bit_num));
+}
+
+/*
+ * Accessor to get the bit corresponding to interrupt ID
+ * from GIC Redistributor IGRPMODR0.
+ */
+unsigned int gicr_get_igrpmodr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igrpmodr0(base);
+
+ return (reg_val >> bit_num) & 0x1U;
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID
+ * in GIC Redistributor IGRPMODR0.
+ */
+void gicr_set_igrpmodr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igrpmodr0(base);
+
+ gicr_write_igrpmodr0(base, reg_val | (1U << bit_num));
+}
+
+/*
+ * Accessor to clear the bit corresponding to interrupt ID
+ * in GIC Redistributor IGRPMODR0.
+ */
+void gicr_clr_igrpmodr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_igrpmodr0(base);
+
+ gicr_write_igrpmodr0(base, reg_val & ~(1U << bit_num));
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID
+ * in GIC Redistributor ISENABLER0.
+ */
+void gicr_set_isenabler0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << ISENABLER_SHIFT) - 1U);
+
+ gicr_write_isenabler0(base, (1U << bit_num));
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID in GIC Redistributor
+ * ICENABLER0.
+ */
+void gicr_set_icenabler0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << ICENABLER_SHIFT) - 1U);
+
+ gicr_write_icenabler0(base, (1U << bit_num));
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID in GIC Redistributor
+ * ISACTIVER0.
+ */
+unsigned int gicr_get_isactiver0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << ISACTIVER_SHIFT) - 1U);
+ unsigned int reg_val = gicr_read_isactiver0(base);
+
+ return (reg_val >> bit_num) & 0x1U;
+}
+
+/*
+ * Accessor to clear the bit corresponding to interrupt ID in GIC Redistributor
+ * ICPENDRR0.
+ */
+void gicr_set_icpendr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << ICPENDR_SHIFT) - 1U);
+
+ gicr_write_icpendr0(base, (1U << bit_num));
+}
+
+/*
+ * Accessor to set the bit corresponding to interrupt ID in GIC Redistributor
+ * ISPENDR0.
+ */
+void gicr_set_ispendr0(uintptr_t base, unsigned int id)
+{
+ unsigned int bit_num = id & ((1U << ISPENDR_SHIFT) - 1U);
+
+ gicr_write_ispendr0(base, (1U << bit_num));
+}
+
+/*
+ * Accessor to set the bit fields corresponding to interrupt ID
+ * in GIC Redistributor ICFGR0.
+ */
+void gicr_set_icfgr0(uintptr_t base, unsigned int id, unsigned int cfg)
+{
+ /* Interrupt configuration is a 2-bit field */
+ unsigned int bit_num = id & ((1U << ICFGR_SHIFT) - 1U);
+ unsigned int bit_shift = bit_num << 1U;
+
+ uint32_t reg_val = gicr_read_icfgr0(base);
+
+ /* Clear the field, and insert required configuration */
+ reg_val &= ~(GIC_CFG_MASK << bit_shift);
+ reg_val |= ((cfg & GIC_CFG_MASK) << bit_shift);
+
+ gicr_write_icfgr0(base, reg_val);
+}
+
+/*
+ * Accessor to set the bit fields corresponding to interrupt ID
+ * in GIC Redistributor ICFGR1.
+ */
+void gicr_set_icfgr1(uintptr_t base, unsigned int id, unsigned int cfg)
+{
+ /* Interrupt configuration is a 2-bit field */
+ unsigned int bit_num = id & ((1U << ICFGR_SHIFT) - 1U);
+ unsigned int bit_shift = bit_num << 1U;
+
+ uint32_t reg_val = gicr_read_icfgr1(base);
+
+ /* Clear the field, and insert required configuration */
+ reg_val &= ~(GIC_CFG_MASK << bit_shift);
+ reg_val |= ((cfg & GIC_CFG_MASK) << bit_shift);
+
+ gicr_write_icfgr1(base, reg_val);
+}