xref: /freebsd/sys/powerpc/include/pcb.h (revision e9ac41698b2f322d55ccf9da50a3596edb2c1800)
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5  * Copyright (C) 1995, 1996 TooLs GmbH.
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 TooLs GmbH.
19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  *
33  *	$NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
34  */
35 
36 #ifndef _MACHINE_PCB_H_
37 #define	_MACHINE_PCB_H_
38 
39 #include <sys/endian.h>
40 
41 #include <machine/setjmp.h>
42 
43 #ifndef _STANDALONE
44 struct pcb {
45 	register_t	pcb_context[20];	/* non-volatile r12-r31 */
46 	register_t	pcb_cr;			/* Condition register */
47 	register_t	pcb_sp;			/* stack pointer */
48 	register_t	pcb_toc;		/* toc pointer */
49 	register_t	pcb_lr;			/* link register */
50 	register_t	pcb_dscr;		/* dscr value */
51 	register_t	pcb_fscr;
52 	register_t	pcb_tar;
53 	struct		pmap *pcb_pm;		/* pmap of our vmspace */
54 	jmp_buf		*pcb_onfault;		/* For use during
55 						    copyin/copyout */
56 	int		pcb_flags;
57 #define	PCB_FPU		0x1	/* Process uses FPU */
58 #define	PCB_FPREGS	0x2	/* Process had FPU registers initialized */
59 #define	PCB_VEC		0x4	/* Process uses Altivec */
60 #define	PCB_VSX		0x8	/* Process had VSX initialized */
61 #define	PCB_CDSCR	0x10	/* Process had Custom DSCR initialized */
62 #define	PCB_HTM		0x20	/* Process had HTM initialized */
63 #define	PCB_CFSCR	0x40	/* Process had FSCR updated */
64 #define	PCB_KERN_FPU    0x80	/* Kernel is using FPU/Vector unit */
65 #define	PCB_KERN_FPU_NOSAVE 0x100 /* FPU/Vec state not saved for kernel use */
66 #define	PCB_VECREGS     0x200	/* Process had Altivec registers initialized */
67 	struct fpu {
68 		union {
69 #if _BYTE_ORDER == _BIG_ENDIAN
70 			double fpr;
71 			uint32_t vsr[4];
72 #else
73 			uint32_t vsr[4];
74 			struct {
75 				double padding;
76 				double fpr;
77 			};
78 #endif
79 		} fpr[32];
80 		double	fpscr;	/* FPSCR stored as double for easier access */
81 	} pcb_fpu;		/* Floating point processor */
82 	unsigned int	pcb_fpcpu;		/* which CPU had our FPU
83 							stuff. */
84 	struct vec {
85 		uint32_t vr[32][4];
86 		uint32_t spare[2];
87 		uint32_t vrsave;
88 		uint32_t vscr;	/* aligned at vector element 3 */
89 	} pcb_vec __aligned(16);	/* Vector processor */
90 	unsigned int	pcb_veccpu;		/* which CPU had our vector
91 							stuff. */
92 	struct htm {
93 		uint64_t tfhar;
94 		uint64_t texasr;
95 		uint64_t tfiar;
96 	} pcb_htm;
97 
98 	struct ebb {
99 		uint64_t ebbhr;
100 		uint64_t ebbrr;
101 		uint64_t bescr;
102 	} pcb_ebb;
103 
104 	struct lmon {
105 		uint64_t lmrr;
106 		uint64_t lmser;
107 	} pcb_lm;
108 
109 	union {
110 		struct {
111 			vm_offset_t	usr_segm;	/* Base address */
112 			register_t	usr_vsid;	/* USER_SR segment */
113 		} aim;
114 		struct {
115 			register_t	dbcr0;
116 		} booke;
117 	} pcb_cpu;
118 	vm_offset_t pcb_lastill;	/* Last illegal instruction */
119 };
120 #endif
121 
122 #ifdef	_KERNEL
123 
124 struct trapframe;
125 
126 #ifndef curpcb
127 extern struct pcb *curpcb;
128 #endif
129 
130 extern struct pmap *curpm;
131 extern struct proc *fpuproc;
132 
133 void	makectx(struct trapframe *, struct pcb *);
134 void	savectx(struct pcb *) __returns_twice;
135 
136 #endif
137 #endif	/* _MACHINE_PCB_H_ */
138