source: mainline/kernel/arch/sparc64/src/trap/interrupt.c@ 06e1e95

/*
 * 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 sparc64interrupt
 * @{
 */
/** @file
 */

#include <arch/interrupt.h>
#include <arch/trap/interrupt.h>
#include <interrupt.h>
#include <arch/drivers/fhc.h>
#include <typedefs.h>
#include <arch/types.h>
#include <debug.h>
#include <ipc/sysipc.h>
#include <arch/asm.h>
#include <arch/barrier.h>
#include <print.h>
#include <genarch/kbd/z8530.h>

/** Register Interrupt Level Handler.
 *
 * @param n Interrupt Level (1 - 15).
 * @param name Short descriptive string.
 * @param f Handler.
 */
void interrupt_register(int n, const char *name, iroutine f)
{
        ASSERT(n >= IVT_FIRST && n <= IVT_ITEMS);
        
        exc_register(n - 1, name, f);
}

/* Reregister irq to be IPC-ready */
void irq_ipc_bind_arch(unative_t irq)
{
#ifdef CONFIG_Z8530
        z8530_belongs_to_kernel = false;
#endif
}

void interrupt(int n, istate_t *istate)
{
        uint64_t intrcv;
        uint64_t data0;

        intrcv = asi_u64_read(ASI_INTR_RECEIVE, 0);
        data0 = asi_u64_read(ASI_UDB_INTR_R, ASI_UDB_INTR_R_DATA_0);

        switch (data0) {
#ifdef CONFIG_Z8530
        case Z8530_INTRCV_DATA0:
                /*
                 * So far, we know we got this interrupt through the FHC.
                 * Since we don't have enough information about the FHC and
                 * because the interrupt looks like level sensitive,
                 * we cannot handle it by scheduling one of the level
                 * interrupt traps. Call the interrupt handler directly.
                 */

                if (z8530_belongs_to_kernel)
                        z8530_interrupt();
                else
                        ipc_irq_send_notif(0);
                fhc_uart_reset();
                break;

#endif
        }

        membar();
        asi_u64_write(ASI_INTR_RECEIVE, 0, 0);
}

/** @}
 */