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
39struct 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
49struct 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
87void	makectx(struct trapframe *tf, struct pcb *pcb);
88void	savectx(struct pcb *pcb) __returns_twice;
89#endif
90
91#endif /* !LOCORE */
92
93#endif /* !_MACHINE_PCB_H_ */
94
95#endif /* !__arm__ */