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Annotation of 43BSDReno/sys/tahoe/pcb.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)pcb.h       7.1 (Berkeley) 5/21/88
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * TAHOE process control block
        !            11:  */
        !            12: struct pcb {
        !            13:        int     pcb_ksp;        /* kernel stack pointer */
        !            14:        int     pcb_usp;        /* user stack pointer */
        !            15:        int     pcb_r0; 
        !            16:        int     pcb_r1; 
        !            17:        int     pcb_r2; 
        !            18:        int     pcb_r3; 
        !            19:        int     pcb_r4; 
        !            20:        int     pcb_r5; 
        !            21:        int     pcb_r6; 
        !            22:        int     pcb_r7; 
        !            23:        int     pcb_r8; 
        !            24:        int     pcb_r9; 
        !            25:        int     pcb_r10; 
        !            26:        int     pcb_r11; 
        !            27:        int     pcb_r12; 
        !            28:        int     pcb_r13; 
        !            29: #define        pcb_fp pcb_r13
        !            30:        int     pcb_pc;         /* program counter */
        !            31:        int     pcb_psl;        /* program status longword */
        !            32:        struct  pte *pcb_p0br;  /* seg 0 base register */
        !            33:        int     pcb_p0lr;       /* seg 0 length register and astlevel */
        !            34:        struct  pte *pcb_p1br;  /* seg 1 base register */
        !            35:        int     pcb_p1lr;       /* seg 1 length register and pme */
        !            36:        struct  pte *pcb_p2br;  /* seg 2 base register */
        !            37:        int     pcb_p2lr;       /* seg 2 length register and pme */
        !            38:        int     pcb_ach;        /* accumulator - high order longword */
        !            39:        int     pcb_acl;        /* accumulator - low order longword */
        !            40: #define ACH    pcb_ach
        !            41: #define ACL    pcb_acl
        !            42:        int     pcb_hfs;        /* fp status register */
        !            43: /*
        !            44:  * Software pcb (extension)
        !            45:  */
        !            46:        union {
        !            47:                float   *faddr; /* address of single precision accumulator */
        !            48:                double  *daddr; /* address of double precision accumulator */
        !            49:        } pcb_savacc;
        !            50: #define FSAVACC        pcb_savacc.faddr
        !            51: #define DSAVACC pcb_savacc.daddr
        !            52:        int     pcb_szpt;       /* number of pages of user page table */
        !            53:        int     pcb_cmap2;
        !            54:        int     *pcb_sswap;
        !            55:        long    pcb_sigc[5];    /* sigcode actually 19 bytes */
        !            56: };
        !            57: 
        !            58: extern long    *user_psl;
        !            59: 
        !            60: #define        aston() { \
        !            61:        u.u_pcb.pcb_psl |= PSL_SFE; \
        !            62:        if ((int)user_psl != 0) \
        !            63:                *user_psl |= PSL_SFE; \
        !            64: }
        !            65: 
        !            66: #define        astoff() { \
        !            67:        u.u_pcb.pcb_psl &= ~ PSL_SFE; \
        !            68:        if ((int)user_psl != 0) \
        !            69:                *user_psl &= ~PSL_SFE; \
        !            70: }

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