diff --git a/plat/arm/board/fvp/fvp_gicv3.c b/plat/arm/board/fvp/fvp_gicv3.c new file mode 100644 index 0000000..a3ee8ef --- /dev/null +++ b/plat/arm/board/fvp/fvp_gicv3.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include + +#include +#include +#include +#include +#include +#include + +/* The GICv3 driver only needs to be initialized in EL3 */ +static uintptr_t fvp_rdistif_base_addrs[PLATFORM_CORE_COUNT]; + +/* Default GICR base address to be used for GICR probe. */ +static uint64_t fvp_gicr_base_addrs[2] = { 0U }; + +/* List of zero terminated GICR frame addresses which CPUs will probe */ +static uint64_t *fvp_gicr_frames = fvp_gicr_base_addrs; + +static const interrupt_prop_t fvp_interrupt_props[] = { + PLAT_ARM_G1S_IRQ_PROPS(INTR_GROUP1S), + PLAT_ARM_G0_IRQ_PROPS(INTR_GROUP0) +}; + +/* + * MPIDR hashing function for translating MPIDRs read from GICR_TYPER register + * to core position. + * + * Calculating core position is dependent on MPIDR_EL1.MT bit. However, affinity + * values read from GICR_TYPER don't have an MT field. To reuse the same + * translation used for CPUs, we insert MT bit read from the PE's MPIDR into + * that read from GICR_TYPER. + * + * Assumptions: + * + * - All CPUs implemented in the system have MPIDR_EL1.MT bit set; + * - No CPUs implemented in the system use affinity level 3. + */ +static unsigned int fvp_gicv3_mpidr_hash(u_register_t mpidr) +{ + u_register_t temp_mpidr = mpidr; + + temp_mpidr |= (read_mpidr_el1() & MPIDR_MT_MASK); + return plat_arm_calc_core_pos(temp_mpidr); +} + + +static gicv3_driver_data_t fvp_gic_data = { + .interrupt_props = fvp_interrupt_props, + .interrupt_props_num = ARRAY_SIZE(fvp_interrupt_props), + .rdistif_num = PLATFORM_CORE_COUNT, + .rdistif_base_addrs = fvp_rdistif_base_addrs, + .mpidr_to_core_pos = fvp_gicv3_mpidr_hash +}; + +void plat_arm_gic_driver_init(void) +{ + /* Get GICD and GICR base addressed through FCONF APIs */ +#if (!defined(__aarch64__) && defined(IMAGE_BL32)) || \ + (defined(__aarch64__) && defined(IMAGE_BL31)) + fvp_gic_data.gicd_base = (uintptr_t)FCONF_GET_PROPERTY(hw_config, + gicv3_config, + gicd_base); + fvp_gicr_base_addrs[0] = FCONF_GET_PROPERTY(hw_config, gicv3_config, + gicr_base); +#else + fvp_gic_data.gicd_base = PLAT_ARM_GICD_BASE; + fvp_gicr_base_addrs[0] = PLAT_ARM_GICR_BASE; +#endif + + /* + * The GICv3 driver is initialized in EL3 and does not need + * to be initialized again in SEL1. This is because the S-EL1 + * can use GIC system registers to manage interrupts and does + * not need GIC interface base addresses to be configured. + */ + +#if (!defined(__aarch64__) && defined(IMAGE_BL32)) || \ + (defined(__aarch64__) && defined(IMAGE_BL31)) + gicv3_driver_init(&fvp_gic_data); + if (gicv3_rdistif_probe((uintptr_t)fvp_gicr_base_addrs[0]) == -1) { + ERROR("No GICR base frame found for Primary CPU\n"); + panic(); + } +#endif +} + +/****************************************************************************** + * Function to iterate over all GICR frames and discover the corresponding + * per-cpu redistributor frame as well as initialize the corresponding + * interface in GICv3. + *****************************************************************************/ +void plat_arm_gic_pcpu_init(void) +{ + int result; + const uint64_t *plat_gicr_frames = fvp_gicr_frames; + + do { + result = gicv3_rdistif_probe(*plat_gicr_frames); + + /* If the probe is successful, no need to proceed further */ + if (result == 0) + break; + + plat_gicr_frames++; + } while (*plat_gicr_frames != 0U); + + if (result == -1) { + ERROR("No GICR base frame found for CPU 0x%lx\n", read_mpidr()); + panic(); + } + gicv3_rdistif_init(plat_my_core_pos()); +} diff --git a/plat/arm/board/fvp/include/fconf_hw_config_getter.h b/plat/arm/board/fvp/include/fconf_hw_config_getter.h index a9e569e..dbce0e4 100644 --- a/plat/arm/board/fvp/include/fconf_hw_config_getter.h +++ b/plat/arm/board/fvp/include/fconf_hw_config_getter.h @@ -15,8 +15,8 @@ #define hw_config__topology_getter(prop) soc_topology.prop struct gicv3_config_t { - uintptr_t gicd_base; - uintptr_t gicr_base; + uint64_t gicd_base; + uint64_t gicr_base; }; struct hw_topology_t { diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk index 04cebca..a88ec13 100644 --- a/plat/arm/board/fvp/platform.mk +++ b/plat/arm/board/fvp/platform.mk @@ -65,6 +65,10 @@ plat/common/plat_gicv3.c \ plat/arm/common/arm_gicv3.c + ifeq ($(filter 1,${BL2_AT_EL3} ${RESET_TO_BL31} ${RESET_TO_SP_MIN}),) + FVP_GIC_SOURCES += plat/arm/board/fvp/fvp_gicv3.c + endif + else ifeq (${FVP_USE_GIC_DRIVER}, FVP_GICV2) # No GICv4 extension