1/*	$NetBSD: pcb.h,v 1.10 2003/10/13 21:46:39 scw Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-4-Clause
5 *
6 * Copyright (c) 2001 Matt Thomas <matt@3am-software.com>.
7 * Copyright (c) 1994 Mark Brinicombe.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the RiscBSD team.
21 * 4. The name "RiscBSD" nor the name of the author may be used to
22 *    endorse or promote products derived from this software without specific
23 *    prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * $FreeBSD$
38 */
39
40#ifndef	_MACHINE_PCB_H_
41#define	_MACHINE_PCB_H_
42
43#include <machine/frame.h>
44#include <machine/vfp.h>
45
46/*
47 * WARNING!
48 * Keep pcb_regs first for faster access in switch.S
49 */
50struct pcb {
51	struct switchframe pcb_regs;		/* CPU state */
52	u_int	pcb_flags;
53#define	PCB_OWNFPU	0x00000001
54#define PCB_NOALIGNFLT	0x00000002
55	caddr_t	pcb_onfault;			/* On fault handler */
56	vm_offset_t	pcb_pagedir;		/* TTB0 value */
57	/*
58	 * XXX:
59	 * Variables pcb_pl1vec, pcb_l1vec, pcb_dacr are used solely
60	 * by old PMAP. Keep them here for PCB binary compatibility
61	 * between old and new PMAP.
62	 */
63	uint32_t *pcb_pl1vec;			/* PTR to vector_base L1 entry*/
64	uint32_t pcb_l1vec;			/* Value to stuff on ctx sw */
65	u_int	pcb_dacr;			/* Domain Access Control Reg */
66
67	struct vfp_state pcb_vfpstate;          /* VP/NEON state */
68	u_int pcb_vfpcpu;                       /* VP/NEON last cpu */
69} __aligned(8); /*
70		 * We need the PCB to be aligned on 8 bytes, as we may
71		 * access it using ldrd/strd, and ARM ABI require it
72		 * to by aligned on 8 bytes.
73		 */
74
75/*
76 * No additional data for core dumps.
77 */
78struct md_coredump {
79	int	md_empty;
80};
81
82void	makectx(struct trapframe *tf, struct pcb *pcb);
83
84#ifdef _KERNEL
85
86void    savectx(struct pcb *) __returns_twice;
87#endif	/* _KERNEL */
88
89#endif	/* !_MACHINE_PCB_H_ */
90