new copyright; att/bsd/shared

[unix-history] / usr / src / sys / tahoe / include / pcb.h

/*-
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Computer Consoles Inc.
*
* %sccs.include.redist.c%
*
*      @(#)pcb.h       7.2 (Berkeley) %G%
*/

/*
* TAHOE process control block
*/
struct pcb {
       int     pcb_ksp;        /* kernel stack pointer */
       int     pcb_usp;        /* user stack pointer */
       int     pcb_r0; 
       int     pcb_r1; 
       int     pcb_r2; 
       int     pcb_r3; 
       int     pcb_r4; 
       int     pcb_r5; 
       int     pcb_r6; 
       int     pcb_r7; 
       int     pcb_r8; 
       int     pcb_r9; 
       int     pcb_r10; 
       int     pcb_r11; 
       int     pcb_r12; 
       int     pcb_r13; 
#define pcb_fp pcb_r13
       int     pcb_pc;         /* program counter */
       int     pcb_psl;        /* program status longword */
       struct  pte *pcb_p0br;  /* seg 0 base register */
       int     pcb_p0lr;       /* seg 0 length register and astlevel */
       struct  pte *pcb_p1br;  /* seg 1 base register */
       int     pcb_p1lr;       /* seg 1 length register and pme */
       struct  pte *pcb_p2br;  /* seg 2 base register */
       int     pcb_p2lr;       /* seg 2 length register and pme */
       int     pcb_ach;        /* accumulator - high order longword */
       int     pcb_acl;        /* accumulator - low order longword */
#define ACH     pcb_ach
#define ACL     pcb_acl
       int     pcb_hfs;        /* fp status register */
/*
* Software pcb (extension)
*/
       union {
               float   *faddr; /* address of single precision accumulator */
               double  *daddr; /* address of double precision accumulator */
       } pcb_savacc;
#define FSAVACC pcb_savacc.faddr
#define DSAVACC pcb_savacc.daddr
       int     pcb_szpt;       /* number of pages of user page table */
       int     pcb_cmap2;
       int     *pcb_sswap;
       long    pcb_sigc[5];    /* sigcode actually 19 bytes */
};

extern long     *user_psl;

#define aston() { \
       u.u_pcb.pcb_psl |= PSL_SFE; \
       if ((int)user_psl != 0) \
               *user_psl |= PSL_SFE; \
}

#define astoff() { \
       u.u_pcb.pcb_psl &= ~ PSL_SFE; \
       if ((int)user_psl != 0) \
               *user_psl &= ~PSL_SFE; \
}