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