pcb.h revision 1.17 
1/*	$NetBSD: pcb.h,v 1.17 2008/01/19 15:04:10 chris 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	/*
48	 * WARNING!
49	 * cpuswitch.S relies on pcb32_r8 being quad-aligned in struct pcb
50	 * (due to the use of "strd" when compiled for XSCALE)
51	 */
52	u_int	pcb32_r8 __aligned(8);		/* used */
53	u_int	pcb32_r9;			/* used */
54	u_int	pcb32_r10;			/* used */
55	u_int	pcb32_r11;			/* used */
56	u_int	pcb32_r12;			/* used */
57	u_int	pcb32_sp;			/* used */
58	u_int	pcb32_lr;
59	u_int	pcb32_pc;
60};
61#define	pcb_pagedir	pcb_un.un_32.pcb32_pagedir
62#define	pcb_pl1vec	pcb_un.un_32.pcb32_pl1vec
63#define	pcb_l1vec	pcb_un.un_32.pcb32_l1vec
64#define	pcb_dacr	pcb_un.un_32.pcb32_dacr
65#define	pcb_cstate	pcb_un.un_32.pcb32_cstate
66
67struct pcb_arm26 {
68	struct	switchframe *pcb26_sf;
69};
70#define	pcb_sf	pcb_un.un_26.pcb26_sf
71
72/*
73 * WARNING!
74 * See warning for struct pcb_arm32, above, before changing struct pcb!
75 */
76struct pcb {
77	u_int	pcb_flags;
78#define	PCB_OWNFPU	0x00000001
79#define	PCB_NOALIGNFLT	0x00000002		/* For EXEC_AOUT */
80	struct	trapframe *pcb_tf;
81	void *	pcb_onfault;			/* On fault handler */
82	union	{
83		struct	pcb_arm32 un_32;
84		struct	pcb_arm26 un_26;
85	} pcb_un;
86	struct	fpe_sp_state pcb_fpstate;	/* Floating Point state */
87};
88#define	pcb_ff	pcb_fpstate			/* for arm26 */
89
90/*
91 * No additional data for core dumps.
92 */
93struct md_coredump {
94	int	md_empty;
95};
96
97#ifdef _KERNEL
98#ifdef _KERNEL_OPT
99#include "opt_multiprocessor.h"
100#endif
101#ifdef MULTIPROCESSOR
102#define curpcb	(curcpu()->ci_curpcb)
103#else
104extern struct pcb *curpcb;
105#endif
106#endif	/* _KERNEL */
107
108#endif	/* _ARM_PCB_H_ */
109