pcpu.h

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    1 /*-
    2  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  *      from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
   27  * $FreeBSD$
   28  */
   29 
   30 #ifndef _MACHINE_PCPU_H_
   31 #define _MACHINE_PCPU_H_
   32 
   33 #include <machine/cpu.h>
   34 #include <machine/cpufunc.h>
   35 
   36 #define ALT_STACK_SIZE  128
   37 
   38 typedef int (*pcpu_bp_harden)(void);
   39 typedef int (*pcpu_ssbd)(int);
   40 struct debug_monitor_state;
   41 
   42 #define PCPU_MD_FIELDS                                                  \
   43         u_int   pc_acpi_id;     /* ACPI CPU id */                       \
   44         u_int   pc_midr;        /* stored MIDR value */                 \
   45         uint64_t pc_clock;                                              \
   46         pcpu_bp_harden pc_bp_harden;                                    \
   47         pcpu_ssbd pc_ssbd;                                              \
   48         struct pmap *pc_curpmap;                                        \
   49         struct pmap *pc_curvmpmap;                                      \
   50         u_int   pc_bcast_tlbi_workaround;                               \
   51         /* Store as two u_int values to preserve KBI */                 \
   52         u_int   pc_mpidr_low;   /* lower MPIDR 32 bits */               \
   53         u_int   pc_mpidr_high;  /* upper MPIDR 32 bits */               \
   54         char __pad[197]
   55 
   56 #ifdef _KERNEL
   57 
   58 struct pcb;
   59 struct pcpu;
   60 
   61 register struct pcpu *pcpup __asm ("x18");
   62 
   63 static inline struct pcpu *
   64 get_pcpu(void)
   65 {
   66         struct pcpu *pcpu;
   67 
   68         __asm __volatile("mov   %0, x18" : "=&r"(pcpu));
   69         return (pcpu);
   70 }
   71 
   72 static inline struct thread *
   73 get_curthread(void)
   74 {
   75         struct thread *td;
   76 
   77         __asm __volatile("ldr   %0, [x18]" : "=&r"(td));
   78         return (td);
   79 }
   80 
   81 #define curthread get_curthread()
   82 
   83 #define PCPU_GET(member)        (pcpup->pc_ ## member)
   84 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
   85 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
   86 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
   87 
   88 #define PCPU_GET_MPIDR(pc)      \
   89     ((((uint64_t)((pc)->pc_mpidr_high)) << 32) | ((pc)->pc_mpidr_low))
   90 
   91 #endif  /* _KERNEL */
   92 
   93 #endif  /* !_MACHINE_PCPU_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/arm64/include/pcpu.h

FreeBSD/Linux Kernel Cross Reference
sys/arm64/include/pcpu.h