FreeBSD/Linux Kernel Cross Reference
sys/mips/include/hwfunc.h

     /*-
      * Copyright (c) 2003-2004 Juli Mallett.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
      * 2. 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_HWFUNC_H_
    #define _MACHINE_HWFUNC_H_
    
    #include <sys/_cpuset.h>
    
    struct timecounter;
    
    /*
     * Hooks downward into platform functionality.
     */
    void platform_reset(void);
    void platform_start(__register_t, __register_t,  __register_t, __register_t);
    
    /* For clocks and ticks and such */
    void platform_initclocks(void);
    uint64_t platform_get_frequency(void);
    unsigned platform_get_timecount(struct timecounter *);
    
    /* For hardware specific CPU initialization */
    void platform_cpu_init(void);
    
    #ifdef SMP
    
    /*
     * Spin up the AP so that it starts executing MP bootstrap entry point: mpentry
     *
     * Returns 0 on sucess and non-zero on failure.
     */
    int platform_start_ap(int processor_id);
    
    /*
     * Platform-specific initialization that needs to be done when an AP starts
     * running. This function is called from the MP bootstrap code in mpboot.S
     */
    void platform_init_ap(int processor_id);
    
    /*
     * Return a plaform-specific interrrupt number that is used to deliver IPIs.
     *
     * This hardware interrupt is used to deliver IPIs exclusively and must
     * not be used for any other interrupt source.
     */
    int platform_ipi_intrnum(void);
    
    /*
     * Trigger a IPI interrupt on 'cpuid'.
     */
    void platform_ipi_send(int cpuid);
    
    /*
     * Quiesce the IPI interrupt source on the current cpu.
     */
    void platform_ipi_clear(void);
    
    /*
     * Return the processor id.
     *
     * Note that this function is called in early boot when stack is not available.
     */
    extern int platform_processor_id(void);
    
    /*
     * Return the cpumask of available processors.
     */
    extern void platform_cpu_mask(cpuset_t *mask);
    
    /*
     * Return the topology of processors on this platform
     */
    struct cpu_group *platform_smp_topo(void);
    
    #endif  /* SMP */
   
   #endif /* !_MACHINE_HWFUNC_H_ */

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