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/* * Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com> * * SPDX-License-Identifier: Apache-2.0 */ #include <toolchain.h> #include <kernel_structs.h> #include <misc/printk.h> void _irq_spurious(void *unused) { u32_t mcause; ARG_UNUSED(unused); __asm__ volatile("csrr %0, mcause" : "=r" (mcause)); mcause &= SOC_MCAUSE_EXP_MASK; printk("Spurious interrupt detected! IRQ: %d\n", (int)mcause); #if defined(CONFIG_RISCV_HAS_PLIC) if (mcause == RISCV_MACHINE_EXT_IRQ) { printk("PLIC interrupt line causing the IRQ: %d\n", riscv_plic_get_irq()); } #endif _NanoFatalErrorHandler(_NANO_ERR_SPURIOUS_INT, &_default_esf); } |