pcpu.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  *      from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
   29  * $FreeBSD$
   30  */
   31 
   32 #ifndef _MACHINE_PCPU_H_
   33 #define _MACHINE_PCPU_H_
   34 
   35 #ifdef _KERNEL
   36 
   37 #include <sys/_lock.h>
   38 #include <sys/_mutex.h>
   39 
   40 #define ALT_STACK_SIZE  128
   41 
   42 struct vmspace;
   43 
   44 #endif  /* _KERNEL */
   45 
   46 #if __ARM_ARCH >= 6
   47 /* Branch predictor hardening method */
   48 #define PCPU_BP_HARDEN_KIND_NONE                0
   49 #define PCPU_BP_HARDEN_KIND_BPIALL              1
   50 #define PCPU_BP_HARDEN_KIND_ICIALLU             2
   51 
   52 #define PCPU_MD_FIELDS                                                  \
   53         unsigned int pc_vfpsid;                                         \
   54         unsigned int pc_vfpmvfr0;                                       \
   55         unsigned int pc_vfpmvfr1;                                       \
   56         struct pmap *pc_curpmap;                                        \
   57         struct mtx pc_cmap_lock;                                        \
   58         void *pc_cmap1_pte2p;                                           \
   59         void *pc_cmap2_pte2p;                                           \
   60         caddr_t pc_cmap1_addr;                                          \
   61         caddr_t pc_cmap2_addr;                                          \
   62         vm_offset_t pc_qmap_addr;                                       \
   63         void *pc_qmap_pte2p;                                            \
   64         unsigned int pc_dbreg[32];                                      \
   65         int pc_dbreg_cmd;                                               \
   66         int pc_bp_harden_kind;                                          \
   67         uint32_t pc_original_actlr;                                     \
   68         uint64_t pc_clock;                                              \
   69         uint32_t pc_mpidr;                                              \
   70         char __pad[135]
   71 #else
   72 #define PCPU_MD_FIELDS                                                  \
   73         char __pad[93]
   74 #endif
   75 
   76 #ifdef _KERNEL
   77 
   78 #define PC_DBREG_CMD_NONE       0
   79 #define PC_DBREG_CMD_LOAD       1
   80 
   81 struct pcb;
   82 struct pcpu;
   83 
   84 extern struct pcpu *pcpup;
   85 
   86 #if __ARM_ARCH >= 6
   87 #define CPU_MASK (0xf)
   88 
   89 #ifndef SMP
   90 #define get_pcpu() (pcpup)
   91 #else
   92 #define get_pcpu() __extension__ ({                                     \
   93         int id;                                                         \
   94         __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));      \
   95         (pcpup + (id & CPU_MASK));                                      \
   96     })
   97 #endif
   98 
   99 static inline struct thread *
  100 get_curthread(void)
  101 {
  102         void *ret;
  103 
  104         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
  105         return (ret);
  106 }
  107 
  108 static inline void
  109 set_curthread(struct thread *td)
  110 {
  111 
  112         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
  113 }
  114 
  115 
  116 static inline void *
  117 get_tls(void)
  118 {
  119         void *tls;
  120 
  121         /* TPIDRURW contains the authoritative value. */
  122         __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
  123         return (tls);
  124 }
  125 
  126 static inline void
  127 set_tls(void *tls)
  128 {
  129 
  130         /*
  131          * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
  132          * first to ensure that a context switch between the two writes will
  133          * still give the desired result of updating both.
  134          */
  135         __asm __volatile(
  136             "mcr p15, 0, %0, c13, c0, 2\n"
  137             "mcr p15, 0, %0, c13, c0, 3\n"
  138              : : "r" (tls));
  139 }
  140 
  141 #define curthread get_curthread()
  142 
  143 #else
  144 #define get_pcpu()      pcpup
  145 #endif
  146 
  147 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
  148 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
  149 #define PCPU_INC(member)        PCPU_ADD(member, 1)
  150 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
  151 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
  152 
  153 void pcpu0_init(void);
  154 #endif  /* _KERNEL */
  155 
  156 #endif  /* !_MACHINE_PCPU_H_ */

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

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