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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1990 by Sun Microsystems, Inc.
*/
#ifndef _SYS_MACHPCB_H
#define _SYS_MACHPCB_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/stack.h>
#include <sys/regset.h>
#include <sys/privregs.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* This file is machine dependent.
*/
/*
* Machine dependent per-thread data.
*/
#define MAXWIN 8 /* max # of windows currently supported */
/*
* The system actually supports one more than the above number.
* There is always one window reserved for trap handlers that
* never has to be saved into the pcb struct.
*/
/*
* Distance from beginning of thread stack (t_stk) to saved regs struct.
*/
#define REGOFF MINFRAME
#ifndef _ASM
/*
* The struct machpcb is always allocated stack aligned.
*/
typedef struct machpcb {
char mpcb_frame[REGOFF];
struct regs mpcb_regs; /* user's saved registers */
struct rwindow mpcb_wbuf[MAXWIN]; /* user window save buffer */
caddr_t mpcb_spbuf[MAXWIN]; /* sp's for each wbuf */
struct rwindow mpcb_rwin[2]; /* windows used while doing watchpoints */
caddr_t mpcb_rsp[2]; /* sp's for pcb_rwin[] */
int mpcb_uwm; /* user window mask */
int mpcb_swm; /* shared user/kernel window mask */
int mpcb_wbcnt; /* number of saved windows in pcb_wbuf */
struct fpu mpcb_fpu; /* fpu state */
struct fq mpcb_fpu_q[MAXFPQ]; /* fpu exception queue */
int mpcb_flags; /* various state flags */
int mpcb_wocnt; /* window overflow count */
int mpcb_wucnt; /* window underflow count */
kthread_t *mpcb_thread; /* associated thread */
} machpcb_t;
#endif /* ! _ASM */
/* mpcb_flags */
#define CLEAN_WINDOWS 0x01 /* keep user regs clean */
#define FP_TRAPPED 0x02 /* fp_traps call caused by fp queue */
#define GOTO_SYS_RTT 0x04 /* return from syscall via sys_rtt */
/*
* We can use lwp_regs to find the mpcb base.
*/
#ifndef _ASM
#define lwptompcb(lwp) ((struct machpcb *) \
((caddr_t)(lwp)->lwp_regs - REGOFF))
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MACHPCB_H */
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