1*2df12b22Sguenther /* $OpenBSD: pcb.h,v 1.11 2015/05/05 02:13:46 guenther Exp $ */ 23a630e3fSniklas /* $NetBSD: pcb.h,v 1.5 1996/11/13 22:21:00 cgd Exp $ */ 3df930be7Sderaadt 4df930be7Sderaadt /* 53a630e3fSniklas * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 6df930be7Sderaadt * All rights reserved. 7df930be7Sderaadt * 8df930be7Sderaadt * Author: Chris G. Demetriou 9df930be7Sderaadt * 10df930be7Sderaadt * Permission to use, copy, modify and distribute this software and 11df930be7Sderaadt * its documentation is hereby granted, provided that both the copyright 12df930be7Sderaadt * notice and this permission notice appear in all copies of the 13df930be7Sderaadt * software, derivative works or modified versions, and any portions 14df930be7Sderaadt * thereof, and that both notices appear in supporting documentation. 15df930be7Sderaadt * 16df930be7Sderaadt * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17df930be7Sderaadt * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18df930be7Sderaadt * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19df930be7Sderaadt * 20df930be7Sderaadt * Carnegie Mellon requests users of this software to return to 21df930be7Sderaadt * 22df930be7Sderaadt * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23df930be7Sderaadt * School of Computer Science 24df930be7Sderaadt * Carnegie Mellon University 25df930be7Sderaadt * Pittsburgh PA 15213-3890 26df930be7Sderaadt * 27df930be7Sderaadt * any improvements or extensions that they make and grant Carnegie the 28df930be7Sderaadt * rights to redistribute these changes. 29df930be7Sderaadt */ 30df930be7Sderaadt 312fa72412Spirofti #ifndef _MACHINE_PCB_H_ 322fa72412Spirofti #define _MACHINE_PCB_H_ 338ae89abbSpvalchev 34df930be7Sderaadt #include <machine/frame.h> 35df930be7Sderaadt #include <machine/reg.h> 36df930be7Sderaadt 3750ce9ee0Sniklas #include <machine/alpha_cpu.h> 38df930be7Sderaadt 39df930be7Sderaadt /* 40df930be7Sderaadt * PCB: process control block 41df930be7Sderaadt * 42df930be7Sderaadt * In this case, the hardware structure that is the defining element 43df930be7Sderaadt * for a process, and the additional state that must be saved by software 44df930be7Sderaadt * on a context switch. Fields marked [HW] are mandated by hardware; fields 45df930be7Sderaadt * marked [SW] are for the software. 46df930be7Sderaadt * 47df930be7Sderaadt * It's said in the VMS PALcode section of the AARM that the pcb address 48df930be7Sderaadt * passed to the swpctx PALcode call has to be a physical address. Not 49df930be7Sderaadt * knowing this (and trying a virtual) address proved this correct. 50df930be7Sderaadt * So we cache the physical address of the pcb in the md_proc struct. 51df930be7Sderaadt */ 52df930be7Sderaadt struct pcb { 5350ce9ee0Sniklas struct alpha_pcb pcb_hw; /* PALcode defined */ 5450ce9ee0Sniklas unsigned long pcb_context[9]; /* s[0-6], ra, ps [SW] */ 55df930be7Sderaadt struct fpreg pcb_fp; /* FP registers [SW] */ 5650ce9ee0Sniklas unsigned long pcb_onfault; /* for copy faults [SW] */ 572df76cc2Sguenther struct cpu_info *volatile pcb_fpcpu; /* CPU with our FP state[SW] */ 58df930be7Sderaadt }; 59df930be7Sderaadt 6050ce9ee0Sniklas #ifdef _KERNEL 61c4071fd1Smillert void savectx(struct pcb *); 6250ce9ee0Sniklas #endif 638ae89abbSpvalchev 642fa72412Spirofti #endif /* _MACHINE_PCB_H_ */ 65