89 lines
3.8 KiB
C
89 lines
3.8 KiB
C
/* Copyright (C) 1990 by Prentice-Hall, Inc. Permission is hereby granted
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* to redistribute the binary and source programs of this system for
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* educational or research purposes. For other use, written permission from
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* Prentice-Hall is required.
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*/
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#define EXTERN extern /* used in *.h files */
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#define PRIVATE static /* PRIVATE x limits the scope of x */
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#define PUBLIC /* PUBLIC is the opposite of PRIVATE */
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#define FORWARD static /* some compilers require this to be 'static'*/
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#define TRUE 1 /* used for turning integers into Booleans */
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#define FALSE 0 /* used for turning integers into Booleans */
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#define HZ 60 /* clock freq (software settable on IBM-PC) */
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#define BLOCK_SIZE 1024 /* # bytes in a disk block */
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#define SUPER_USER (uid_t) 0 /* uid_t of superuser */
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#define MAJOR 8 /* major device = (dev>>MAJOR) & 0377 */
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#define MINOR 0 /* minor device = (dev>>MINOR) & 0377 */
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#ifdef AM_KERNEL
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#define NR_TASKS 14 /* must be 5 more than without amoeba */
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#else
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#define NR_TASKS 9 /* number of tasks in the transfer vector */
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#endif
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#define NR_PROCS 32 /* number of slots in proc table */
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#define NR_SEGS 3 /* # segments per process */
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#define T 0 /* proc[i].mem_map[T] is for text */
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#define D 1 /* proc[i].mem_map[D] is for data */
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#define S 2 /* proc[i].mem_map[S] is for stack */
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#define MAX_P_LONG 2147483647 /* maximum positive long, i.e. 2**31 - 1 */
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/* Memory is allocated in clicks. */
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#if (CHIP == INTEL) || (CHIP == M68000)
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#define CLICK_SIZE 256 /* unit in which memory is allocated */
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#define CLICK_SHIFT 8 /* log2 of CLICK_SIZE */
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#endif
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#define click_to_round_k(n) \
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((unsigned) ((((unsigned long) (n) << CLICK_SHIFT) + 512) / 1024))
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#if CLICK_SIZE < 1024
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#define k_to_click(n) ((n) * (1024 / CLICK_SIZE))
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#else
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#define k_to_click(n) ((n) / (CLICK_SIZE / 1024))
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#endif
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/* Process numbers of some important processes */
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#define MM_PROC_NR 0 /* process number of memory manager */
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#define FS_PROC_NR 1 /* process number of file system */
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#define INIT_PROC_NR 2 /* init -- the process that goes multiuser */
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#define LOW_USER 2 /* first user not part of operating system */
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/* Miscellaneous */
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#define BYTE 0377 /* mask for 8 bits */
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#define TO_USER 0 /* flag telling to copy from fs to user */
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#define FROM_USER 1 /* flag telling to copy from user to fs */
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#define READING 0 /* copy data to user */
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#define WRITING 1 /* copy data from user */
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#if (MACHINE != ATARI)
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#define ABS -999 /* this process means absolute memory */
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#endif
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#define WORD_SIZE 2 /* number of bytes per word */
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#define NIL_PTR (char *) 0 /* generally useful expression */
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#define NO_NUM 0x8000 /* used as numerical argument to panic() */
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#define SIG_PUSH_BYTES (4*sizeof(int)) /* how many bytes pushed by signal */
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/* Flag bits for i_mode in the inode. */
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#define I_TYPE 0170000 /* this field gives inode type */
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#define I_REGULAR 0100000 /* regular file, not dir or special */
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#define I_BLOCK_SPECIAL 0060000 /* block special file */
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#define I_DIRECTORY 0040000 /* file is a directory */
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#define I_CHAR_SPECIAL 0020000 /* character special file */
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#define I_NAMED_PIPE 0010000 /* named pipe (FIFO) */
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#define I_SET_UID_BIT 0004000 /* set effective uid_t on exec */
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#define I_SET_GID_BIT 0002000 /* set effective gid_t on exec */
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#define ALL_MODES 0006777 /* all bits for user, group and others */
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#define RWX_MODES 0000777 /* mode bits for RWX only */
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#define R_BIT 0000004 /* Rwx protection bit */
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#define W_BIT 0000002 /* rWx protection bit */
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#define X_BIT 0000001 /* rwX protection bit */
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#define I_NOT_ALLOC 0000000 /* this inode is free */
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