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Annotation of coherent/f/usr/include.78/sys/fakeff.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT 386 Device Driver Kit release 2.0
        !             3:  *     Copyright (c) 1982, 1992 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: /*
        !             7:  * fakeff.h
        !             8:  * Include file to simulate all the far memory calls from COH 286.
        !             9:  * Far pointers are simulated with virtual addresses.
        !            10:  */
        !            11: #ifndef __SYS_FAKEFF_H__
        !            12: #define __SYS_FAKEFF_H__
        !            13: 
        !            14: typedef        unsigned long   faddr_t;
        !            15: 
        !            16: /*
        !            17:  * Read a byte from far address 'fp'.  Note that if an address fault
        !            18:  * occurs, the system will panic.
        !            19:  */
        !            20: #define ffbyte(fp)     (*((unsigned char *) (fp)))
        !            21: 
        !            22: /*
        !            23:  * Read a word from far address 'fp'.  Note that if an address fault
        !            24:  * occurs, the system will panic.
        !            25:  */
        !            26: #define ffword(fp)     (*((unsigned short *) (fp)))
        !            27: 
        !            28: /*
        !            29:  * Copy 'n' bytes from far address 'fp' to address 'k' in the kernel
        !            30:  * data segment.  Returns the number of bytes copied.
        !            31:  * Note that if an address fault occurs, the system will panic.
        !            32:  */
        !            33: #define fkcopy(fp, k, n)       kkcopy(fp, k, n)
        !            34: 
        !            35: /*
        !            36:  * Copy 'count' bytes from 'from_fp' to 'to_fp'.
        !            37:  * Note that if an address fault occurs, the system will panic.
        !            38:  */
        !            39: #define ffcopy(from_fp, to_fp, count)  (void) kkcopy(from_fp, to_fp, count)
        !            40: 
        !            41: /*
        !            42:  * Write byte 'b' to address 'fp'.  Note that if an address
        !            43:  * fault occurs, the system will panic.
        !            44:  */
        !            45: #define sfbyte(fp, b)  {*(unsigned char *)(fp) = (unsigned char)(b);}
        !            46: 
        !            47: /*
        !            48:  * Write word 'w' to address 'fp'.  Note that if an address
        !            49:  * fault occurs, the system will panic.
        !            50:  */
        !            51: #define sfword(fp, w)  {*((unsigned short *)(fp)) = (unsigned short)(w);}
        !            52: 
        !            53: faddr_t ptov();
        !            54: void vrelse();
        !            55: 
        !            56: #endif /* FAKEFF_H */

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