118 lines
5.1 KiB
C
Executable file
118 lines
5.1 KiB
C
Executable file
/* Copyright (C) 2001 by Prentice-Hall, Inc. See the copyright notice in
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* the file /usr/src/LICENSE.
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*/
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#ifndef CHIP
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#error CHIP is not defined
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#endif
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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 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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#define NULL ((void *)0) /* null pointer */
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#define CPVEC_NR 16 /* max # of entries in a SYS_VCOPY request */
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#define CPVVEC_NR 64 /* max # of entries in a SYS_VCOPY request */
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#define NR_IOREQS MIN(NR_BUFS, 64)
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/* maximum number of entries in an iorequest */
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#define SEGMENT_TYPE 0xFF00 /* bit mask to get segment type */
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#define SEGMENT_INDEX 0x00FF /* bit mask to get segment index */
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#define LOCAL_SEG 0x0000 /* flags indicating local memory segment */
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#define NR_LOCAL_SEGS 3 /* # local segments per process (fixed) */
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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 REMOTE_SEG 0x0100 /* flags indicating remote memory segment */
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#define NR_REMOTE_SEGS 3 /* # remote memory regions (variable) */
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#define BIOS_SEG 0x0200 /* flags indicating BIOS memory segment */
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#define NR_BIOS_SEGS 3 /* # BIOS memory regions (variable) */
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#define PHYS_SEG 0x0300 /* flag indicating entire physical memory */
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/* Labels used to disable code sections for different reasons. */
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#define DEAD_CODE 0 /* unused code in normal configuration */
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#define FUTURE_CODE 0 /* new code to be activated + tested later */
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#define TEMP_CODE 1 /* active code to be removed later */
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/* Process name length in the process table, including '\0'. */
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#define PROC_NAME_LEN 16
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/* Miscellaneous */
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#define BYTE 0377 /* mask for 8 bits */
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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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#define NO_NUM 0x8000 /* used as numerical argument to panic() */
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#define NIL_PTR (char *) 0 /* generally useful expression */
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#define HAVE_SCATTERED_IO 1 /* scattered I/O is now standard */
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/* Macros. */
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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/* Memory is allocated in clicks. */
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#if (CHIP == INTEL)
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#define CLICK_SIZE 1024 /* unit in which memory is allocated */
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#define CLICK_SHIFT 10 /* log2 of CLICK_SIZE */
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#endif
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#if (CHIP == SPARC) || (CHIP == M68000)
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#define CLICK_SIZE 4096 /* unit in which memory is allocated */
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#define CLICK_SHIFT 12 /* log2 of CLICK_SIZE */
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#endif
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/* Click to byte conversions (and vice versa). */
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#define HCLICK_SHIFT 4 /* log2 of HCLICK_SIZE */
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#define HCLICK_SIZE 16 /* hardware segment conversion magic */
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#if CLICK_SIZE >= HCLICK_SIZE
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#define click_to_hclick(n) ((n) << (CLICK_SHIFT - HCLICK_SHIFT))
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#else
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#define click_to_hclick(n) ((n) >> (HCLICK_SHIFT - CLICK_SHIFT))
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#endif
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#define hclick_to_physb(n) ((phys_bytes) (n) << HCLICK_SHIFT)
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#define physb_to_hclick(n) ((n) >> HCLICK_SHIFT)
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#define ABS -999 /* this process means absolute memory */
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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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/* Some limits. */
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#define MAX_BLOCK_NR ((block_t) 077777777) /* largest block number */
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#define HIGHEST_ZONE ((zone_t) 077777777) /* largest zone number */
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#define MAX_INODE_NR ((ino_t) 037777777777) /* largest inode number */
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#define MAX_FILE_POS ((off_t) 037777777777) /* largest legal file offset */
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#define NO_BLOCK ((block_t) 0) /* absence of a block number */
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#define NO_ENTRY ((ino_t) 0) /* absence of a dir entry */
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#define NO_ZONE ((zone_t) 0) /* absence of a zone number */
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#define NO_DEV ((dev_t) 0) /* absence of a device numb */
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