watchdog.h

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/*
 * Copyright (c) 2008
 * Embedded Brains GmbH
 * Obere Lagerstr. 30
 * D-82178 Puchheim
 * Germany
 * rtems@embedded-brains.de
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */
 
#ifndef LIBCPU_POWERPC_MPC55XX_WATCHDOG_H
#define LIBCPU_POWERPC_MPC55XX_WATCHDOG_H
 
#include <stdbool.h>
 
#include <rtems.h>
 
#include <libcpu/powerpc-utility.h>
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
static inline void mpc55xx_watchdog_clear()
{
    PPC_SET_SPECIAL_PURPOSE_REGISTER( BOOKE_TSR, BOOKE_TSR_WIS);
}
 
static inline void mpc55xx_watchdog_enable_interrupt( bool enable)
{
    if (enable) {
        PPC_SET_SPECIAL_PURPOSE_REGISTER_BITS( BOOKE_TCR, BOOKE_TCR_WIE);
    } else {
        PPC_CLEAR_SPECIAL_PURPOSE_REGISTER_BITS( BOOKE_TCR, BOOKE_TCR_WIE);
    }
}
 
static inline rtems_status_code mpc55xx_watchdog_set_time_base_bit( uint32_t bit)
{
    if (bit > 63) {
        return RTEMS_INVALID_NUMBER;
    }
 
    PPC_SET_SPECIAL_PURPOSE_REGISTER_BITS_MASKED(
        BOOKE_TCR,
        BOOKE_TCR_WP( bit) | BOOKE_TCR_WPEXT( bit >> 2),
        BOOKE_TCR_WP_MASK | BOOKE_TCR_WPEXT_MASK
    );
 
    return RTEMS_SUCCESSFUL;
}
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* LIBCPU_POWERPC_MPC55XX_WATCHDOG_H */