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Annotation of coherent/a/usr/include.b4ps2/sys/fakeff.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * fakeff.h
                      3:  * Include file to simulate all the far memory calls from COH 286.
                      4:  * Far pointers are simulated with virtual addresses.
                      5:  */
                      6: #ifndef FAKEFF_H       /* Rest of file.  */
                      7: #define FAKEFF_H
                      8: 
                      9: typedef        unsigned long   faddr_t;
                     10: 
                     11: /*
                     12:  * Read a byte from far address 'fp'.  Note that if an address fault
                     13:  * occurs, the system will panic.
                     14:  */
                     15: #define ffbyte(fp)     (*((unsigned char *) (fp)))
                     16: 
                     17: /*
                     18:  * Read a word from far address 'fp'.  Note that if an address fault
                     19:  * occurs, the system will panic.
                     20:  */
                     21: #define ffword(fp)     (*((unsigned short *) (fp)))
                     22: 
                     23: /*
                     24:  * Copy 'n' bytes from far address 'fp' to address 'k' in the kernel
                     25:  * data segment.  Returns the number of bytes copied.
                     26:  * Note that if an address fault occurs, the system will panic.
                     27:  */
                     28: #define fkcopy(fp, k, n)       kkcopy(fp, k, n)
                     29: 
                     30: /*
                     31:  * Copy 'count' bytes from 'from_fp' to 'to_fp'.
                     32:  * Note that if an address fault occurs, the system will panic.
                     33:  */
                     34: #define ffcopy(from_fp, to_fp, count)  (void) kkcopy(from_fp, to_fp, count)
                     35: 
                     36: /*
                     37:  * Write byte 'b' to address 'fp'.  Note that if an address
                     38:  * fault occurs, the system will panic.
                     39:  */
                     40: #define sfbyte(fp, b)  {*(unsigned char *)(fp) = (unsigned char)(b);}
                     41: 
                     42: /*
                     43:  * Write word 'w' to address 'fp'.  Note that if an address
                     44:  * fault occurs, the system will panic.
                     45:  */
                     46: #define sfword(fp, w)  {*((unsigned short *)(fp)) = (unsigned short)(w);}
                     47: 
                     48: faddr_t ptov();
                     49: void vrelse();
                     50: 
                     51: #endif /* FAKEFF_H */

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