The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2003-2004 Juli Mallett.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 #ifndef _MACHINE_HWFUNC_H_
   31 #define _MACHINE_HWFUNC_H_
   32 
   33 #include <sys/_cpuset.h>
   34 
   35 struct timecounter;
   36 
   37 /*
   38  * Hooks downward into platform functionality.
   39  */
   40 void platform_reset(void);
   41 void platform_start(__register_t, __register_t,  __register_t, __register_t);
   42 
   43 /* For clocks and ticks and such */
   44 void platform_initclocks(void);
   45 uint64_t platform_get_frequency(void);
   46 unsigned platform_get_timecount(struct timecounter *);
   47 
   48 /* For hardware specific CPU initialization */
   49 void platform_cpu_init(void);
   50 
   51 #ifdef SMP
   52 
   53 /*
   54  * Spin up the AP so that it starts executing MP bootstrap entry point: mpentry
   55  *
   56  * Returns 0 on sucess and non-zero on failure.
   57  */
   58 int platform_start_ap(int processor_id);
   59 
   60 /*
   61  * Platform-specific initialization that needs to be done when an AP starts
   62  * running. This function is called from the MP bootstrap code in mpboot.S
   63  */
   64 void platform_init_ap(int processor_id);
   65 
   66 /*
   67  * Return a plaform-specific interrrupt number that is used to deliver IPIs.
   68  *
   69  * This hardware interrupt is used to deliver IPIs exclusively and must
   70  * not be used for any other interrupt source.
   71  */
   72 int platform_ipi_hardintr_num(void);
   73 int platform_ipi_softintr_num(void);
   74 
   75 #ifdef PLATFORM_INIT_SECONDARY
   76 /*
   77  * Set up IPIs for this CPU.
   78  */
   79 void platform_init_secondary(int cpuid);
   80 #endif
   81 
   82 /*
   83  * Trigger a IPI interrupt on 'cpuid'.
   84  */
   85 void platform_ipi_send(int cpuid);
   86 
   87 /*
   88  * Quiesce the IPI interrupt source on the current cpu.
   89  */
   90 void platform_ipi_clear(void);
   91 
   92 /*
   93  * Return the processor id.
   94  *
   95  * Note that this function is called in early boot when stack is not available.
   96  */
   97 extern int platform_processor_id(void);
   98 
   99 /*
  100  * Return the cpumask of available processors.
  101  */
  102 extern void platform_cpu_mask(cpuset_t *mask);
  103 
  104 /*
  105  * Return the topology of processors on this platform
  106  */
  107 struct cpu_group *platform_smp_topo(void);
  108 
  109 #endif  /* SMP */
  110 
  111 #endif /* !_MACHINE_HWFUNC_H_ */

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