pcb.h revision 1.13 
1/*	$NetBSD: pcb.h,v 1.13 2006/09/27 21:42:05 manu 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
44struct trapframe;
45
46struct pcb_arm32 {
47	paddr_t	pcb32_pagedir;			/* PT hooks */
48	pd_entry_t *pcb32_pl1vec;		/* PTR to vector_base L1 entry*/
49	pd_entry_t pcb32_l1vec;			/* Value to stuff on ctx sw */
50	u_int	pcb32_dacr;			/* Domain Access Control Reg */
51	void	*pcb32_cstate;			/* &pmap->pm_cstate */
52	/*
53	 * WARNING!
54	 * cpuswitch.S relies on pcb32_r8 being quad-aligned in struct pcb
55	 * (due to the use of "strd" when compiled for XSCALE)
56	 */
57	u_int	pcb32_r8;			/* used */
58	u_int	pcb32_r9;			/* used */
59	u_int	pcb32_r10;			/* used */
60	u_int	pcb32_r11;			/* used */
61	u_int	pcb32_r12;			/* used */
62	u_int	pcb32_sp;			/* used */
63	u_int	pcb32_lr;
64	u_int	pcb32_pc;
65	u_int	pcb32_und_sp;
66};
67#define	pcb_pagedir	pcb_un.un_32.pcb32_pagedir
68#define	pcb_pl1vec	pcb_un.un_32.pcb32_pl1vec
69#define	pcb_l1vec	pcb_un.un_32.pcb32_l1vec
70#define	pcb_dacr	pcb_un.un_32.pcb32_dacr
71#define	pcb_cstate	pcb_un.un_32.pcb32_cstate
72
73struct pcb_arm26 {
74	struct	switchframe *pcb26_sf;
75};
76#define	pcb_sf	pcb_un.un_26.pcb26_sf
77
78/*
79 * WARNING!
80 * See warning for struct pcb_arm32, above, before changing struct pcb!
81 */
82struct pcb {
83	u_int	pcb_flags;
84#define	PCB_OWNFPU	0x00000001
85#define	PCB_NOALIGNFLT	0x00000002		/* For EXEC_AOUT */
86	struct	trapframe *pcb_tf;
87	caddr_t	pcb_onfault;			/* On fault handler */
88	union	{
89		struct	pcb_arm32 un_32;
90		struct	pcb_arm26 un_26;
91	} pcb_un;
92	struct	fpe_sp_state pcb_fpstate;	/* Floating Point state */
93};
94#define	pcb_ff	pcb_fpstate			/* for arm26 */
95
96/*
97 * No additional data for core dumps.
98 */
99struct md_coredump {
100	int	md_empty;
101};
102
103#ifdef _KERNEL
104#ifdef _KERNEL_OPT
105#include "opt_multiprocessor.h"
106#endif
107#ifdef MULTIPROCESSOR
108#define curpcb	(curcpu()->ci_curpcb)
109#else
110extern struct pcb *curpcb;
111#endif
112#endif	/* _KERNEL */
113
114#endif	/* _ARM_PCB_H_ */
115