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Annotation of sys/arch/m88k/include/pcb.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pcb.h,v 1.4 2007/01/13 22:00:56 miod Exp $ */
                      2: /*
                      3:  * Copyright (c) 1996 Nivas Madhur
                      4:  * Mach Operating System
                      5:  * Copyright (c) 1993-1992 Carnegie Mellon University
                      6:  * All Rights Reserved.
                      7:  *
                      8:  * Permission to use, copy, modify and distribute this software and its
                      9:  * documentation is hereby granted, provided that both the copyright
                     10:  * notice and this permission notice appear in all copies of the
                     11:  * software, derivative works or modified versions, and any portions
                     12:  * thereof, and that both notices appear in supporting documentation.
                     13:  *
                     14:  * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     15:  * CONDITION.  CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
                     16:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     17:  *
                     18:  * Carnegie Mellon requests users of this software to return to
                     19:  *
                     20:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
                     21:  *  School of Computer Science
                     22:  *  Carnegie Mellon University
                     23:  *  Pittsburgh PA 15213-3890
                     24:  *
                     25:  * any improvements or extensions that they make and grant Carnegie Mellon
                     26:  * the rights to redistribute these changes.
                     27:  */
                     28: /*
                     29:  * Motorola 88100 pcb definitions
                     30:  *
                     31:  */
                     32: /*
                     33:  */
                     34: #ifndef _M88K_PCB_H_
                     35: #define _M88K_PCB_H_
                     36:
                     37: #include <machine/frame.h>
                     38:
                     39: /*
                     40:  * Our PCB is the regular PCB+Save area for kernel frame.
                     41:  * Upon entering kernel mode from user land, save the user context
                     42:  * in the saved_state area - this is passed as the exception frame.
                     43:  * On a context switch, only registers that need to be saved by the
                     44:  * C calling convention and few other regs (pc, psr etc) are saved
                     45:  * in the kernel_state part of the PCB. Typically, trap frames are
                     46:  * saved on the stack (by low level handlers or by hardware) but,
                     47:  * we just decided to do it in the PCB.
                     48:  */
                     49:
                     50: struct m88100_pcb {
                     51:        unsigned pcb_pc;        /* address to return */
                     52:        unsigned :32;
                     53:        unsigned pcb_r14;
                     54:        unsigned pcb_r15;
                     55:        unsigned pcb_r16;
                     56:        unsigned pcb_r17;
                     57:        unsigned pcb_r18;
                     58:        unsigned pcb_r19;
                     59:        unsigned pcb_r20;
                     60:        unsigned pcb_r21;
                     61:        unsigned pcb_r22;
                     62:        unsigned pcb_r23;
                     63:        unsigned pcb_r24;
                     64:        unsigned pcb_r25;
                     65:        unsigned pcb_r26;
                     66:        unsigned pcb_r27;
                     67:        unsigned pcb_r28;
                     68:        unsigned pcb_r29;
                     69:        unsigned pcb_r30;
                     70:        unsigned pcb_sp;        /* kernel stack pointer */
                     71:        /* floating-point state */
                     72:        unsigned pcb_fcr62;
                     73:        unsigned pcb_fcr63;
                     74: };
                     75:
                     76: struct pcb
                     77: {
                     78:        struct m88100_pcb       kernel_state;
                     79:        struct trapframe        user_state;
                     80:        int                     pcb_onfault;
                     81: };
                     82:
                     83: /*
                     84:  *     Location of saved user registers for the proc.
                     85:  */
                     86: #define        USER_REGS(p) \
                     87:        (((struct reg *)(&((p)->p_addr->u_pcb.user_state))))
                     88:
                     89: /*
                     90:  * The pcb is augmented with machine-dependent additional data for
                     91:  * core dumps.  Note that the trapframe here is a copy of the one
                     92:  * from the top of the kernel stack (included here so that the kernel
                     93:  * stack itself need not be dumped).
                     94:  */
                     95: struct md_coredump {
                     96:        struct  trapframe md_tf;
                     97: };
                     98:
                     99: #endif /* _M88K_PCB_H_ */