diff options
Diffstat (limited to 'bsps/riscv/riscv/irq/irq.c')
| -rw-r--r-- | bsps/riscv/riscv/irq/irq.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/bsps/riscv/riscv/irq/irq.c b/bsps/riscv/riscv/irq/irq.c index 9266c2b2c7..4c19a07ae5 100644 --- a/bsps/riscv/riscv/irq/irq.c +++ b/bsps/riscv/riscv/irq/irq.c @@ -268,10 +268,12 @@ static void riscv_plic_init(const void *fdt) uint32_t cpu_index; /* - * Interrupt enable registers with 32-bit alignment based on - * number of interrupts. + * Each interrupt enable register contains exactly 32 enable bits. + * Calculate the enable register count based on the number of interrupts + * supported by the PLIC. Take the reserved interrupt ID zero into + * account. */ - enable_register_count = RTEMS_ALIGN_UP(ndev, 32) / 32; + enable_register_count = RTEMS_ALIGN_UP(ndev + 1, 32) / 32; hart_index = riscv_get_hart_index_by_phandle(fdt32_to_cpu(val[i / 4])); |