sys/arm/include/pcpu.h

   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 #ifdef _KERNEL
  34
  35 #include <machine/cpuconf.h>
  36
  37 #define ALT_STACK_SIZE  128
  38
  39 struct vmspace;
  40
  41 #endif  /* _KERNEL */
  42
  43 #if __ARM_ARCH >= 6
  44 #define PCPU_MD_FIELDS                                                  \
  45         unsigned int pc_vfpsid;                                         \
  46         unsigned int pc_vfpmvfr0;                                       \
  47         unsigned int pc_vfpmvfr1;                                       \
  48         struct pmap *pc_curpmap;                                        \
  49         vm_offset_t pc_qmap_addr;                                       \
  50         void *pc_qmap_pte;                                              \
  51         unsigned int pc_dbreg[32];                                      \
  52         int pc_dbreg_cmd;                                               \
  53         char __pad[1]
  54 #else
  55 #define PCPU_MD_FIELDS                                                  \
  56         vm_offset_t qmap_addr;                                          \
  57         void *pc_qmap_pte;                                              \
  58         char __pad[149]
  59 #endif
  60
  61 #ifdef _KERNEL
  62
  63 #define PC_DBREG_CMD_NONE       0
  64 #define PC_DBREG_CMD_LOAD       1
  65
  66 struct pcb;
  67 struct pcpu;
  68
  69 extern struct pcpu *pcpup;
  70
  71 #if __ARM_ARCH >= 6
  72 #define CPU_MASK (0xf)
  73
  74 #ifndef SMP
  75 #define get_pcpu() (pcpup)
  76 #else
  77 #define get_pcpu() __extension__ ({                                     \
  78         int id;                                                         \
  79         __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));      \
  80         (pcpup + (id & CPU_MASK));                                      \
  81     })
  82 #endif
  83
  84 static inline struct thread *
  85 get_curthread(void)
  86 {
  87         void *ret;
  88
  89         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
  90         return (ret);
  91 }
  92
  93 static inline void
  94 set_curthread(struct thread *td)
  95 {
  96
  97         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
  98 }
  99
 100
 101 static inline void *
 102 get_tls(void)
 103 {
 104         void *tls;
 105
 106         __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
 107         return (tls);
 108 }
 109
 110 static inline void
 111 set_tls(void *tls)
 112 {
 113
 114         __asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
 115 }
 116
 117 #define curthread get_curthread()
 118
 119 #else
 120 #define get_pcpu()      pcpup
 121 #endif
 122
 123 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
 124 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
 125 #define PCPU_INC(member)        PCPU_ADD(member, 1)
 126 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
 127 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
 128
 129 void pcpu0_init(void);
 130 #endif  /* _KERNEL */
 131
 132 #endif  /* !_MACHINE_PCPU_H_ */