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/* $OpenBSD: pcb.h,v 1.10 2003/10/11 22:08:57 miod Exp $ */
/*
* Copyright (c) 1996 Nivas Madhur
* Mach Operating System
* Copyright (c) 1993-1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Motorola 88100 pcb definitions
*
*/
/*
*/
#ifndef _M88K_PCB_H_
#define _M88K_PCB_H_
#include <machine/reg.h>
/*
* Our PCB is the regular PCB+Save area for kernel frame.
* Upon entering kernel mode from user land, save the user context
* in the saved_state area - this is passed as the exception frame.
* On a context switch, only registers that need to be saved by the
* C calling convention and few other regs (pc, psr etc) are saved
* in the kernel_state part of the PCB. Typically, trap fames are
* save on the stack (by low level handlers or by hardware) but,
* we just decided to do it in the PCB.
*/
/*
* This must always be an even number of words long so that our stack
* will always be properly aligned (88k need 8 byte alignment). Also,
* place r14 on double word boundary so that we can use st.d while
* saving the regs.
*/
struct m88100_pcb {
unsigned pcb_pc; /* address to return */
unsigned pcb_ipl;
unsigned pcb_r14;
unsigned pcb_r15;
unsigned pcb_r16;
unsigned pcb_r17;
unsigned pcb_r18;
unsigned pcb_r19;
unsigned pcb_r20;
unsigned pcb_r21;
unsigned pcb_r22;
unsigned pcb_r23;
unsigned pcb_r24;
unsigned pcb_r25;
unsigned pcb_r26;
unsigned pcb_r27;
unsigned pcb_r28;
unsigned pcb_r29;
unsigned pcb_r30;
unsigned pcb_sp; /* kernel stack pointer */
};
#define m88100_saved_state reg
#define trapframe m88100_saved_state
struct pcb
{
struct m88100_pcb kernel_state;
struct m88100_saved_state user_state;
int pcb_onfault; /* for copyin/copyout faults */
int pcb_pad; /* pad it XXX */
};
typedef struct pcb *pcb_t; /* exported */
/*
* Location of saved user registers for the proc.
*/
#define USER_REGS(p) \
(((struct m88100_saved_state *) (&((p)->p_addr->u_pcb.user_state))))
/*
* The pcb is augmented with machine-dependent additional data for
* core dumps. Note that the trapframe here is a copy of the one
* from the top of the kernel stack (included here so that the kernel
* stack itself need not be dumped).
*/
struct md_coredump {
struct trapframe md_tf;
};
#endif /* _M88K_PCB_H_ */
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