sys/arch/arm/include/pcb.h

   1 /*      pcb.h,v 1.14.22.2 2007/11/06 23:15:05 matt Exp  */
   2
   3 /*
   4  * Copyright (c) 2001 Matt Thomas <matt@3am-software.com>.
   5  * Copyright (c) 1994 Mark Brinicombe.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the RiscBSD team.
  19  * 4. The name "RiscBSD" nor the name of the author may be used to
  20  *    endorse or promote products derived from this software without specific
  21  *    prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #ifndef _ARM_PCB_H_
  37 #define _ARM_PCB_H_
  38
  39 #include <machine/frame.h>
  40 #include <machine/fp.h>
  41
  42 #include <arm/arm32/pte.h>
  43 #include <arm/reg.h>
  44
  45 struct trapframe;
  46
  47 struct pcb_arm32 {
  48         /*
  49          * WARNING!
  50          * cpuswitch.S relies on pcb32_r8 being quad-aligned in struct pcb
  51          * (due to the use of "strd" when compiled for XSCALE)
  52          */
  53         u_int   pcb32_r8 __aligned(8);          /* used */
  54         u_int   pcb32_r9;                       /* used */
  55         u_int   pcb32_r10;                      /* used */
  56         u_int   pcb32_r11;                      /* used */
  57         u_int   pcb32_r12;                      /* used */
  58         u_int   pcb32_sp;                       /* used */
  59         u_int   pcb32_lr;
  60         u_int   pcb32_pc;
  61
  62         /*
  63          * ARMv6 has two user thread/process id registers which can hold
  64          * any 32bit quanttiies.
  65          */
  66         u_int   pcb32_user_pid_rw;              /* p15, 0, Rd, c13, c0, 2 */
  67         u_int   pcb32_user_pid_ro;              /* p15, 0, Rd, c13, c0, 3 */
  68 };
  69 #define pcb_pagedir     pcb_un.un_32.pcb32_pagedir
  70 #define pcb_pl1vec      pcb_un.un_32.pcb32_pl1vec
  71 #define pcb_l1vec       pcb_un.un_32.pcb32_l1vec
  72 #define pcb_dacr        pcb_un.un_32.pcb32_dacr
  73 #define pcb_cstate      pcb_un.un_32.pcb32_cstate
  74
  75 struct pcb_arm26 {
  76         struct  switchframe *pcb26_sf;
  77 };
  78 #define pcb_sf  pcb_un.un_26.pcb26_sf
  79
  80 /*
  81  * WARNING!
  82  * See warning for struct pcb_arm32, above, before changing struct pcb!
  83  */
  84 struct pcb {
  85         u_int   pcb_flags;
  86 #define PCB_OWNFPU      0x00000001
  87 #define PCB_NOALIGNFLT  0x00000002              /* For EXEC_AOUT */
  88         struct  trapframe *pcb_tf;
  89         void *  pcb_onfault;                    /* On fault handler */
  90         union   {
  91                 struct  pcb_arm32 un_32;
  92                 struct  pcb_arm26 un_26;
  93         } pcb_un;
  94         struct  fpe_sp_state pcb_fpstate;       /* FPA Floating Point state */
  95         struct  vfpreg pcb_vfp;                 /* VFP registers */
  96         struct  cpu_info *pcb_vfpcpu;           /* CPU holding VFP state */
  97 };
  98 #define pcb_ff  pcb_fpstate                     /* for arm26 */
  99
 100 /*
 101  * No additional data for core dumps.
 102  */
 103 struct md_coredump {
 104         int     md_empty;
 105 };
 106
 107 #ifdef _KERNEL
 108 #ifdef _KERNEL_OPT
 109 #include "opt_multiprocessor.h"
 110 #endif
 111 #ifdef MULTIPROCESSOR
 112 #define curpcb  (curcpu()->ci_curpcb)
 113 #else
 114 extern struct pcb *curpcb;
 115 #endif
 116 #endif  /* _KERNEL */
 117
 118 #endif  /* _ARM_PCB_H_ */