/* * Copyright (c) 2005 Jakub Jermar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup kernel_sparc64_interrupt * @{ */ /** @file */ #include <arch/barrier.h> #include <arch/interrupt.h> #include <arch/sparc64.h> #include <arch/trap/interrupt.h> #include <interrupt.h> #include <ddi/irq.h> #include <stdint.h> #include <debug.h> #include <arch/asm.h> #include <barrier.h> #include <log.h> #include <arch.h> #include <mm/tlb.h> #include <config.h> #include <synch/spinlock.h> /** Process hardware interrupt. * * @param n Ignored. * @param istate Ignored. */ void interrupt(unsigned int n, istate_t *istate) { uint64_t status = asi_u64_read(ASI_INTR_DISPATCH_STATUS, 0); if (status & (!INTR_DISPATCH_STATUS_BUSY)) panic("Interrupt Dispatch Status busy bit not set\n"); uint64_t intrcv = asi_u64_read(ASI_INTR_RECEIVE, 0); #if defined (US) uint64_t data0 = asi_u64_read(ASI_INTR_R, ASI_UDB_INTR_R_DATA_0); #elif defined (US3) uint64_t data0 = asi_u64_read(ASI_INTR_R, VA_INTR_R_DATA_0); #endif irq_t *irq = irq_dispatch_and_lock(data0); if (irq) { /* * The IRQ handler was found. */ irq->handler(irq); /* * See if there is a clear-interrupt-routine and call it. */ if (irq->cir) irq->cir(irq->cir_arg, irq->inr); irq_spinlock_unlock(&irq->lock, false); } else if (data0 > config.base) { /* * This is a cross-call. * data0 contains address of the kernel function. * We call the function only after we verify * it is one of the supported ones. */ #ifdef CONFIG_SMP if (data0 == (uintptr_t) tlb_shootdown_ipi_recv) tlb_shootdown_ipi_recv(); #endif } else { /* * Spurious interrupt. */ #ifdef CONFIG_DEBUG log(LF_ARCH, LVL_DEBUG, "cpu%u: spurious interrupt (intrcv=%#" PRIx64 ", data0=%#" PRIx64 ")", CPU->id, intrcv, data0); #else (void) intrcv; #endif } membar(); asi_u64_write(ASI_INTR_RECEIVE, 0, 0); } /** @} */