diff options
Diffstat (limited to 'src/acpi')
| -rw-r--r-- | src/acpi/Kconfig | 4 | ||||
| -rw-r--r-- | src/acpi/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/acpi/acpi_gic.c | 89 |
3 files changed, 94 insertions, 0 deletions
diff --git a/src/acpi/Kconfig b/src/acpi/Kconfig index dc57fef05e..cb2befbac4 100644 --- a/src/acpi/Kconfig +++ b/src/acpi/Kconfig @@ -53,6 +53,10 @@ config ACPI_COMMON_MADT_LAPIC config ACPI_COMMON_MADT_IOAPIC bool +config ACPI_COMMON_MADT_GICC_V3 + bool + depends on ARCH_ARM64 + config ACPI_NO_PCAT_8259 bool help diff --git a/src/acpi/Makefile.inc b/src/acpi/Makefile.inc index e4a832f314..cb0bbb4eb2 100644 --- a/src/acpi/Makefile.inc +++ b/src/acpi/Makefile.inc @@ -20,6 +20,7 @@ ramstage-y += pld.c ramstage-y += sata.c ramstage-y += soundwire.c ramstage-y += fadt_filler.c +ramstage-$(CONFIG_ACPI_COMMON_MADT_GICC_V3) += acpi_gic.c all-y += acpi_pm.c smm-y += acpi_pm.c diff --git a/src/acpi/acpi_gic.c b/src/acpi/acpi_gic.c new file mode 100644 index 0000000000..74e26fd694 --- /dev/null +++ b/src/acpi/acpi_gic.c @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <acpi/acpi.h> + +static int acpi_create_madt_one_gicc_v3(acpi_madt_gicc_t *gicc, u32 acpi_uid, u32 pi_gsiv, + uint32_t vgic_mi, uint64_t mpidr) +{ + memset(gicc, 0, sizeof(acpi_madt_gicc_t)); + gicc->type = GICC; + gicc->length = sizeof(acpi_madt_gicc_t); + gicc->reserved = 0; + gicc->cpu_interface_number = 0; /* V3, no compat mode */ + gicc->acpi_processor_uid = acpi_uid; + gicc->flags.enabled = 1; + gicc->parking_protocol_persion = 0; /* Assume PSCI exclusively */ + gicc->performance_interrupt_gsiv = pi_gsiv; + gicc->parked_address = 0; + gicc->physical_base_address = 0; /* V3, no compat mode */ + gicc->vgic_maintenance_interrupt = vgic_mi; + gicc->gicr_base_address = 0; /* ignored by OSPM if GICR is present */ + gicc->processor_power_efficiency_class = 0; /* Ignore for now */ + /* For platforms implementing GIC V3 the format must be: + * Bits [63:40] Must be zero + * Bits [39:32] Aff3 : Match Aff3 of target processor MPIDR + * Bits [31:24] Must be zero + * Bits [23:16] Aff2 : Match Aff2 of target processor MPIDR + * Bits [15:8] Aff1 : Match Aff1 of target processor MPIDR + * Bits [7:0] Aff0 : Match Aff0 of target processor MPIDR + */ + gicc->mpidr = mpidr & 0xff00fffffful; + + return gicc->length; +} + +static unsigned long acpi_create_madt_giccs_v3(unsigned long current) +{ + // Loop over CPUs GIC + uint32_t acpi_id = 0; + for (struct device *dev = dev_find_path(NULL, DEVICE_PATH_GICC_V3); dev; + dev = dev_find_path(dev, DEVICE_PATH_GICC_V3)) { + acpi_madt_gicc_t *gicc = (acpi_madt_gicc_t *)current; + current += acpi_create_madt_one_gicc_v3(gicc, acpi_id++, + dev->path.gicc_v3.pi_gsiv, + dev->path.gicc_v3.vgic_mi, + dev->path.gicc_v3.mpidr); + } + + return current; +} + +static unsigned long acpi_create_madt_gicd_v3(unsigned long current) +{ + acpi_madt_gicd_t *gicd = (acpi_madt_gicd_t *)current; + memset(gicd, 0, sizeof(acpi_madt_gicd_t)); + gicd->type = GICD; + gicd->length = sizeof(acpi_madt_gicd_t); + gicd->physical_base_address = platform_get_gicd_base(); + gicd->system_vector_base = 0; + gicd->gic_version = 3; + + return current + gicd->length; +} + +/* + * The redistributor in GICv3 has two 64KB frames per CPU; in + * GICv4 it has four 64KB frames per CPU. + */ +#define GICV3_REDIST_SIZE 0x20000 +#define GICV4_REDIST_SIZE 0x40000 +static unsigned long acpi_create_madt_gicr_v3(unsigned long current) +{ + acpi_madt_gicr_t *gicr = (acpi_madt_gicr_t *)current; + memset(gicr, 0, sizeof(acpi_madt_gicr_t)); + gicr->type = GICR; + gicr->length = sizeof(acpi_madt_gicr_t); + gicr->discovery_range_base_address = platform_get_gicr_base(); + gicr->discovery_range_length = GICV3_REDIST_SIZE * CONFIG_MAX_CPUS; + + return current + gicr->length; +} + +unsigned long acpi_arch_fill_madt(acpi_madt_t *madt, unsigned long current) +{ + current = acpi_create_madt_giccs_v3(current); + current = acpi_create_madt_gicd_v3(current); + current = acpi_create_madt_gicr_v3(current); + + return current; +} |