diff options
Diffstat (limited to 'drivers/arm/gic/v3/gicv3_helpers.c')
| -rw-r--r-- | drivers/arm/gic/v3/gicv3_helpers.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/arm/gic/v3/gicv3_helpers.c b/drivers/arm/gic/v3/gicv3_helpers.c index d752013e2..753d995d7 100644 --- a/drivers/arm/gic/v3/gicv3_helpers.c +++ b/drivers/arm/gic/v3/gicv3_helpers.c @@ -393,3 +393,18 @@ unsigned int gicv3_rdistif_get_number_frames(const uintptr_t gicr_frame) return count; } + +unsigned int gicv3_get_component_partnum(const uintptr_t gic_frame) +{ + unsigned int part_id; + + /* + * The lower 8 bits of PIDR0, complemented by the lower 4 bits of + * PIDR1 contain a part number identifying the GIC component at a + * particular base address. + */ + part_id = mmio_read_32(gic_frame + GICD_PIDR0_GICV3) & 0xff; + part_id |= (mmio_read_32(gic_frame + GICD_PIDR1_GICV3) << 8) & 0xf00; + + return part_id; +} |