xref: /freebsd/sys/arm64/include/pcb.h (revision 215fd38e2915d142cb4b0245f137329ef4da5a12)
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  
39  struct 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  
49  struct 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
87  void	makectx(struct trapframe *tf, struct pcb *pcb);
88  int	savectx(struct pcb *pcb) __returns_twice;
89  #endif
90  
91  #endif /* !LOCORE */
92  
93  #endif /* !_MACHINE_PCB_H_ */
94  
95  #endif /* !__arm__ */
96