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
38#ifndef	_MACHINE_PCB_H_
39#define	_MACHINE_PCB_H_
40
41#include <machine/frame.h>
42#include <machine/vfp.h>
43
44/*
45 * WARNING!
46 * Keep pcb_regs first for faster access in switch.S
47 */
48struct pcb {
49	struct switchframe pcb_regs;		/* CPU state */
50	u_int	pcb_flags;
51#define	PCB_OWNFPU	0x00000001
52#define PCB_NOALIGNFLT	0x00000002
53	caddr_t	pcb_onfault;			/* On fault handler */
54	vm_offset_t	pcb_pagedir;		/* TTB0 value */
55	/*
56	 * XXX:
57	 * Variables pcb_pl1vec, pcb_l1vec, pcb_dacr are used solely
58	 * by old PMAP. Keep them here for PCB binary compatibility
59	 * between old and new PMAP.
60	 */
61	uint32_t *pcb_pl1vec;			/* PTR to vector_base L1 entry*/
62	uint32_t pcb_l1vec;			/* Value to stuff on ctx sw */
63	u_int	pcb_dacr;			/* Domain Access Control Reg */
64
65	struct vfp_state pcb_vfpstate;          /* VP/NEON state */
66	u_int pcb_vfpcpu;                       /* VP/NEON last cpu */
67#define	PCB_FP_STARTED	0x01
68#define	PCB_FP_KERN	0x02
69#define	PCB_FP_NOSAVE	0x04
70	struct vfp_state *pcb_vfpsaved;          /* VP/NEON state */
71	int		pcb_fpflags;
72} __aligned(8); /*
73		 * We need the PCB to be aligned on 8 bytes, as we may
74		 * access it using ldrd/strd, and ARM ABI require it
75		 * to by aligned on 8 bytes.
76		 */
77
78/*
79 * No additional data for core dumps.
80 */
81struct md_coredump {
82	int	md_empty;
83};
84
85void	makectx(struct trapframe *tf, struct pcb *pcb);
86
87#ifdef _KERNEL
88
89void    savectx(struct pcb *) __returns_twice;
90#endif	/* _KERNEL */
91
92#endif	/* !_MACHINE_PCB_H_ */