664b726cd3
- all TTY-related exceptions have now been merged into the regular code paths, allowing non-TTY drivers to expose TTY-like devices; - as part of this, CTTY_MAJOR is now fully managed by VFS instead of being an ugly stepchild of the TTY driver; - device styles have become completely obsolete, support for them has been removed throughout the system; same for device flags, which had already become useless a while ago; - device map open/close and I/O function pointers have lost their use, thus finally making the VFS device code actually readable; - the device-unrelated pm_setsid has been moved to misc.c; - some other small cleanup-related changes. Change-Id: If90b10d1818e98a12139da3e94a15d250c9933da
167 lines
6.5 KiB
C
167 lines
6.5 KiB
C
#ifndef _MINIX_CONST_H
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#define _MINIX_CONST_H
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#include <machine/archconst.h>
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/* The UNUSED annotation tells the compiler or lint not to complain
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* about an unused variable or function parameter.
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*
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* A number of different annotations are used, depending on the
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* compiler or checker that is looking at the code.
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*
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* Note that some variants rename the parameter, so if you use
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* the parameter after all, you'll get a complaint about a missing
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* variable.
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*
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* You use it like this:
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*
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* void foo(int UNUSED(x)){}
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*/
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#ifndef UNUSED
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#if defined _lint
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# define UNUSED(v) /*lint -e(715,818)*/ v
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#elif defined(__GNUC__)
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# define UNUSED(v) UNUSED_ ## v __attribute((unused))
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#elif defined __LCLINT__
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# define UNUSED(v) /*@unused@*/ v
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#else
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# define UNUSED(v) _UNUSED_ ## v
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#endif
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#endif
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#define EXTERN extern /* used in *.h files */
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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 SUPER_USER ((uid_t) 0) /* uid_t of superuser */
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#include <sys/null.h> /* NULL Pointer */
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#define SCPVEC_NR 64 /* max # of entries in a SYS_VSAFECOPY request */
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#define MAPVEC_NR 64 /* max # of entries in a SYS_VUMAP request */
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#define NR_IOREQS 64 /* maximum number of entries in an iorequest */
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#define VUA_READ 0x01 /* for SYS_VUMAP: read access */
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#define VUA_WRITE 0x02 /* for SYS_VUMAP: write access */
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/* Message passing constants. */
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#define MESS_SIZE (sizeof(message)) /* might need usizeof from FS here */
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/* Memory related constants. */
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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 D_OBSOLETE 1 /* proc[i].mem_map[D] is for data */
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#define PHYS_SEG 0x0400 /* flag indicating entire physical memory */
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#define LOCAL_VM_SEG 0x1000 /* same as LOCAL_SEG, but with vm lookup */
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#define MEM_GRANT 3
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#define VIR_ADDR 1
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#define VM_D (LOCAL_VM_SEG | VIR_ADDR)
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#define VM_GRANT (LOCAL_VM_SEG | MEM_GRANT)
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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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/* 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 PEEKING 2 /* retrieve FS data without copying */
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#define HAVE_SCATTERED_IO 1 /* scattered I/O is now standard */
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/* Memory is allocated in clicks. */
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#if defined(__i386__) || defined(__arm__)
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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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#else
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#error Unsupported arch
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#endif
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/* Click alignment macros. */
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#define CLICK_FLOOR(n) (((vir_bytes)(n) / CLICK_SIZE) * CLICK_SIZE)
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#define CLICK_CEIL(n) CLICK_FLOOR((vir_bytes)(n) + CLICK_SIZE-1)
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/* Sizes of memory tables. The boot monitor distinguishes three memory areas,
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* namely low mem below 1M, 1M-16M, and mem after 16M. More chunks are needed
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* for DOS MINIX.
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*/
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#define NR_MEMS 16
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#define CLICK2ABS(v) ((v) << CLICK_SHIFT)
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#define ABS2CLICK(a) ((a) >> CLICK_SHIFT)
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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_UNIX_SOCKET 0140000 /* unix domain socket */
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#define I_SYMBOLIC_LINK 0120000 /* file is a symbolic link */
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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 I_SET_STCKY_BIT 0001000 /* sticky bit */
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#define ALL_MODES 0007777 /* 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_INODE_NR ((ino_t) 037777777777) /* largest inode number */
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#define MAX_FILE_POS ((off_t) 0x7FFFFFFF) /* largest legal file offset */
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#define UMAX_FILE_POS ((unsigned) 0x7FFFFFFF) /* largest legal file offset */
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#define MAX_SYM_LOOPS 8 /* how many symbolic links are recursed */
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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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#define NO_LINK ((nlink_t) 0) /* absence of incoming links */
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#define INVAL_UID ((uid_t) -1) /* invalid uid value */
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#define INVAL_GID ((gid_t) -1) /* invalid gid value */
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#define SERVARNAME "cttyline"
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#define ARCHVARNAME "arch"
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#define BOARDVARNAME "board"
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#define SERBAUDVARNAME "cttybaud"
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/* Bits for s_flags in the privilege structure. */
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#define PREEMPTIBLE 0x002 /* kernel tasks are not preemptible */
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#define BILLABLE 0x004 /* some processes are not billable */
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#define DYN_PRIV_ID 0x008 /* privilege id assigned dynamically */
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#define SYS_PROC 0x010 /* system processes have own priv structure */
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#define CHECK_IO_PORT 0x020 /* check if I/O request is allowed */
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#define CHECK_IRQ 0x040 /* check if IRQ can be used */
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#define CHECK_MEM 0x080 /* check if (VM) mem map request is allowed */
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#define ROOT_SYS_PROC 0x100 /* this is a root system process instance */
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#define VM_SYS_PROC 0x200 /* this is a vm system process instance */
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#define LU_SYS_PROC 0x400 /* this is a live updated sys proc instance */
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#define RST_SYS_PROC 0x800 /* this is a restarted sys proc instance */
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/* Values for the "verbose" boot monitor variable */
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#define VERBOSEBOOT_QUIET 0
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#define VERBOSEBOOT_BASIC 1
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#define VERBOSEBOOT_EXTRA 2
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#define VERBOSEBOOT_MAX 3
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#define VERBOSEBOOTVARNAME "verbose"
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/* magic value to put in struct proc entries for sanity checks. */
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#define PMAGIC 0xC0FFEE1
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/* MINIX_KERNFLAGS flags */
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#define MKF_I386_INTEL_SYSENTER (1L << 0) /* SYSENTER available and supported */
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#define MKF_I386_AMD_SYSCALL (1L << 1) /* SYSCALL available and supported */
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#endif /* _MINIX_CONST_H */
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