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Diffstat (limited to '')
| -rw-r--r-- | plat/marvell/armada/common/marvell_gicv2.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/plat/marvell/armada/common/marvell_gicv2.c b/plat/marvell/armada/common/marvell_gicv2.c new file mode 100644 index 0000000..2505c9f --- /dev/null +++ b/plat/marvell/armada/common/marvell_gicv2.c @@ -0,0 +1,148 @@ +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * SPDX-License-Identifier: BSD-3-Clause + * https://spdx.org/licenses + */ + +#include <platform_def.h> + +#include <bl31/interrupt_mgmt.h> +#include <common/debug.h> +#include <drivers/arm/gicv2.h> +#include <lib/bakery_lock.h> +#include <lib/mmio.h> +#include <plat/common/platform.h> + +#include <plat_marvell.h> + +/* + * The following functions are defined as weak to allow a platform to override + * the way the GICv2 driver is initialised and used. + */ +#pragma weak plat_marvell_gic_driver_init +#pragma weak plat_marvell_gic_init + +#define A7K8K_PIC_CAUSE_REG 0xf03f0100 +#define A7K8K_PIC0_MASK_REG 0xf03f0108 + +#define A7K8K_PIC_PMUOF_IRQ_MASK (1 << 17) + +#define A7K8K_PIC_MAX_IRQS 32 +#define A7K8K_PIC_MAX_IRQ_MASK ((1UL << A7K8K_PIC_MAX_IRQS) - 1) + +#define A7K8K_ODMIN_SET_REG 0xf0300040 +#define A7K8K_ODMI_PMU_IRQ(idx) ((2 + idx) << 12) + +#define A7K8K_ODMI_PMU_GIC_IRQ(idx) (130 + idx) + +static DEFINE_BAKERY_LOCK(a7k8k_irq_lock); + +/* + * On a GICv2 system, the Group 1 secure interrupts are treated as Group 0 + * interrupts. + */ +static const interrupt_prop_t marvell_interrupt_props[] = { + PLAT_MARVELL_G1S_IRQ_PROPS(GICV2_INTR_GROUP0), + PLAT_MARVELL_G0_IRQ_PROPS(GICV2_INTR_GROUP0) +}; + +static unsigned int target_mask_array[PLATFORM_CORE_COUNT]; + +/* + * Ideally `marvell_gic_data` structure definition should be a `const` but it is + * kept as modifiable for overwriting with different GICD and GICC base when + * running on FVP with VE memory map. + */ +static gicv2_driver_data_t marvell_gic_data = { + .gicd_base = PLAT_MARVELL_GICD_BASE, + .gicc_base = PLAT_MARVELL_GICC_BASE, + .interrupt_props = marvell_interrupt_props, + .interrupt_props_num = ARRAY_SIZE(marvell_interrupt_props), + .target_masks = target_mask_array, + .target_masks_num = ARRAY_SIZE(target_mask_array), +}; + +/* + * ARM common helper to initialize the GICv2 only driver. + */ +void plat_marvell_gic_driver_init(void) +{ + gicv2_driver_init(&marvell_gic_data); +} + +static uint64_t a7k8k_pmu_interrupt_handler(uint32_t id, + uint32_t flags, + void *handle, + void *cookie) +{ + unsigned int idx = plat_my_core_pos(); + uint32_t irq; + + bakery_lock_get(&a7k8k_irq_lock); + + /* Acknowledge IRQ */ + irq = plat_ic_acknowledge_interrupt(); + + plat_ic_end_of_interrupt(irq); + + if (irq != MARVELL_IRQ_PIC0) { + bakery_lock_release(&a7k8k_irq_lock); + return 0; + } + + /* Acknowledge PMU overflow IRQ in PIC0 */ + mmio_setbits_32(A7K8K_PIC_CAUSE_REG, A7K8K_PIC_PMUOF_IRQ_MASK); + + /* Trigger ODMI Frame IRQ */ + mmio_write_32(A7K8K_ODMIN_SET_REG, A7K8K_ODMI_PMU_IRQ(idx)); + + bakery_lock_release(&a7k8k_irq_lock); + + return 0; +} + +void mvebu_pmu_interrupt_enable(void) +{ + unsigned int idx; + uint32_t flags; + int32_t rc; + + /* Reset PIC */ + mmio_write_32(A7K8K_PIC_CAUSE_REG, A7K8K_PIC_MAX_IRQ_MASK); + /* Unmask PMU overflow IRQ in PIC0 */ + mmio_clrbits_32(A7K8K_PIC0_MASK_REG, A7K8K_PIC_PMUOF_IRQ_MASK); + + /* Configure ODMI Frame IRQs as edge triggered */ + for (idx = 0; idx < PLATFORM_CORE_COUNT; idx++) + gicv2_interrupt_set_cfg(A7K8K_ODMI_PMU_GIC_IRQ(idx), + GIC_INTR_CFG_EDGE); + + /* + * Register IRQ handler as INTR_TYPE_S_EL1 as its the only valid type + * for GICv2 in ARM-TF. + */ + flags = 0U; + set_interrupt_rm_flag((flags), (NON_SECURE)); + rc = register_interrupt_type_handler(INTR_TYPE_S_EL1, + a7k8k_pmu_interrupt_handler, + flags); + if (rc != 0) + panic(); +} + +void mvebu_pmu_interrupt_disable(void) +{ + /* Reset PIC */ + mmio_write_32(A7K8K_PIC_CAUSE_REG, A7K8K_PIC_MAX_IRQ_MASK); + /* Mask PMU overflow IRQ in PIC0 */ + mmio_setbits_32(A7K8K_PIC0_MASK_REG, A7K8K_PIC_PMUOF_IRQ_MASK); +} + +void plat_marvell_gic_init(void) +{ + gicv2_distif_init(); + gicv2_pcpu_distif_init(); + gicv2_set_pe_target_mask(plat_my_core_pos()); + gicv2_cpuif_enable(); +} |