source: mainline/kernel/arch/mips32/src/mach/msim/msim.c

/*
 * Copyright (c) 2013 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_mips32
 * @{
 */
/** @file
 *  @brief msim platform driver.
 */

#include <arch/mach/msim/msim.h>
#include <arch/mach/msim/dorder.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <genarch/drivers/dsrln/dsrlnin.h>
#include <genarch/drivers/dsrln/dsrlnout.h>
#include <genarch/srln/srln.h>
#include <stdbool.h>

static void msim_init(void);
static void msim_cpu_halt(void);
static void msim_get_memory_extents(uintptr_t *, size_t *);
static void msim_frame_init(void);
static void msim_output_init(void);
static void msim_input_init(void);
static const char *msim_get_platform_name(void);

struct mips32_machine_ops msim_machine_ops = {
        .machine_init = msim_init,
        .machine_cpu_halt = msim_cpu_halt,
        .machine_get_memory_extents = msim_get_memory_extents,
        .machine_frame_init = msim_frame_init,
        .machine_output_init = msim_output_init,
        .machine_input_init = msim_input_init,
        .machine_get_platform_name = msim_get_platform_name
};

static void msim_irq_handler(unsigned int i)
{
        irq_t *irq = irq_dispatch_and_lock(i);
        if (irq) {
                irq->handler(irq);
                irq_spinlock_unlock(&irq->lock, false);
        } else {
#ifdef CONFIG_DEBUG
                log(LF_ARCH, LVL_DEBUG, "cpu%u: spurious IRQ (irq=%u)",
                    CPU->id, i);
#endif
        }
}

void msim_init(void)
{
        irq_init(HW_INTERRUPTS, HW_INTERRUPTS);

        int_handler[INT_HW0] = msim_irq_handler;
        int_handler[INT_HW1] = msim_irq_handler;
        int_handler[INT_HW2] = msim_irq_handler;
        int_handler[INT_HW3] = msim_irq_handler;
        int_handler[INT_HW4] = msim_irq_handler;

        dorder_init();
        cp0_unmask_int(MSIM_DDISK_IRQ);
}

void msim_cpu_halt(void)
{
}

void msim_get_memory_extents(uintptr_t *start, size_t *size)
{
}

void msim_frame_init(void)
{
}

void msim_output_init(void)
{
#ifdef CONFIG_MSIM_PRN
        outdev_t *dsrlndev = dsrlnout_init((ioport8_t *) MSIM_KBD_ADDRESS,
            KSEG12PA(MSIM_KBD_ADDRESS));
        if (dsrlndev)
                stdout_wire(dsrlndev);
#endif
}

void msim_input_init(void)
{
#ifdef CONFIG_MSIM_KBD
        /*
         * Initialize the msim keyboard port. Then initialize the serial line
         * module and connect it to the msim keyboard. Enable keyboard
         * interrupts.
         */
        dsrlnin_instance_t *dsrlnin_instance =
            dsrlnin_init((dsrlnin_t *) MSIM_KBD_ADDRESS, MSIM_KBD_IRQ);
        if (dsrlnin_instance) {
                srln_instance_t *srln_instance = srln_init();
                if (srln_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *srln = srln_wire(srln_instance, sink);
                        dsrlnin_wire(dsrlnin_instance, srln);
                        cp0_unmask_int(MSIM_KBD_IRQ);
                }
        }
#endif
}

const char *msim_get_platform_name(void)
{
        return "msim";
}

/** @}
 */