sys/arm64/include/pcb.h

   1 /*-
   2  * Copyright (c) 2001 Jake Burkholder.
   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
  27 #ifdef __arm__
  28 #include <arm/pcb.h>
  29 #else /* !__arm__ */
  30
  31 #ifndef _MACHINE_PCB_H_
  32 #define _MACHINE_PCB_H_
  33
  34 #ifndef LOCORE
  35
  36 #include <machine/debug_monitor.h>
  37 #include <machine/vfp.h>
  38
  39 struct trapframe;
  40
  41 /* The first register in pcb_x is x19 */
  42 #define PCB_X_START     19
  43
  44 #define PCB_X19         0
  45 #define PCB_X20         1
  46 #define PCB_FP          10
  47 #define PCB_LR          11
  48
  49 struct pcb {
  50         uint64_t        pcb_x[12];
  51         /* These two need to be in order as we access them together */
  52         uint64_t        pcb_sp;
  53         uint64_t        pcb_tpidr_el0;
  54         uint64_t        pcb_tpidrro_el0;
  55
  56         /* Fault handler, the error value is passed in x0 */
  57         vm_offset_t     pcb_onfault;
  58
  59         u_int           pcb_flags;
  60 #define PCB_SINGLE_STEP_SHIFT   0
  61 #define PCB_SINGLE_STEP         (1 << PCB_SINGLE_STEP_SHIFT)
  62         u_int           pcb_sve_len;    /* The SVE vector length */
  63
  64         struct vfpstate *pcb_fpusaved;
  65         int             pcb_fpflags;
  66 #define PCB_FP_STARTED  0x00000001
  67 #define PCB_FP_SVEVALID 0x00000002
  68 #define PCB_FP_KERN     0x40000000
  69 #define PCB_FP_NOSAVE   0x80000000
  70 /* The bits passed to userspace in get_fpcontext */
  71 #define PCB_FP_USERMASK (PCB_FP_STARTED | PCB_FP_SVEVALID)
  72         u_int           pcb_vfpcpu;     /* Last cpu this thread ran VFP code */
  73         void            *pcb_svesaved;
  74         uint64_t        pcb_reserved[4];
  75
  76         /*
  77          * The userspace VFP state. The pcb_fpusaved pointer will point to
  78          * this unless the kernel has allocated a VFP context.
  79          * Place last to simplify the asm to access the rest if the struct.
  80          */
  81         struct vfpstate pcb_fpustate;
  82
  83         struct debug_monitor_state pcb_dbg_regs;
  84 };
  85
  86 #ifdef _KERNEL
  87 void    makectx(struct trapframe *tf, struct pcb *pcb);
  88 void    savectx(struct pcb *pcb) __returns_twice;
  89 #endif
  90
  91 #endif /* !LOCORE */
  92
  93 #endif /* !_MACHINE_PCB_H_ */
  94
  95 #endif /* !__arm__ */