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Annotation of coherent/f/usr/include.78/sys/fakeff.h, revision 1.1.1.1

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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