sys_config.h

Minix3.11的源码。[MINIX 3是一个为高可靠性应用而设计的自由且简洁的类UNIX系统。]

#ifndef _MINIX_SYS_CONFIG_H
#define _MINIX_SYS_CONFIG_H 1

/*===========================================================================*
 *		This section contains user-settable parameters		     *
 *===========================================================================*/
#define _MINIX_MACHINE       _MACHINE_IBM_PC

#define _MACHINE_IBM_PC             1	/* any  8088 or 80x86-based system */
#define _MACHINE_SUN_4             40	/* any Sun SPARC-based system */
#define _MACHINE_SUN_4_60	   40	/* Sun-4/60 (aka SparcStation 1 or Campus) */
#define _MACHINE_ATARI             60	/* ATARI ST/STe/TT (68000/68030) */
#define _MACHINE_MACINTOSH         62	/* Apple Macintosh (68000) */

/* Word size in bytes (a constant equal to sizeof(int)). */
#if __ACK__ || __GNUC__
#define _WORD_SIZE	_EM_WSIZE
#define _PTR_SIZE	_EM_WSIZE
#endif

#define _NR_PROCS	100
#define _NR_SYS_PROCS	32
#define _NR_HOLES (2*_NR_PROCS+4)  /* No. of memory holes maintained by PM */

/* Set the CHIP type based on the machine selected. The symbol CHIP is actually
 * indicative of more than just the CPU.  For example, machines for which
 * CHIP == INTEL are expected to have 8259A interrrupt controllers and the
 * other properties of IBM PC/XT/AT/386 types machines in general. */
#define _CHIP_INTEL             1	/* CHIP type for PC, XT, AT, 386 and clones */
#define _CHIP_M68000            2	/* CHIP type for Atari, Amiga, Macintosh    */
#define _CHIP_SPARC             3	/* CHIP type for SUN-4 (e.g. SPARCstation)  */

/* Set the FP_FORMAT type based on the machine selected, either hw or sw    */
#define _FP_NONE		  0	/* no floating point support                */
#define _FP_IEEE		  1	/* conform IEEE floating point standard     */

#if (_MINIX_MACHINE == _MACHINE_IBM_PC)
#define _MINIX_CHIP          _CHIP_INTEL
#endif

#if (_MINIX_MACHINE == _MACHINE_ATARI) || (_MINIX_MACHINE == _MACHINE_MACINTOSH)
#define _MINIX_CHIP         _CHIP_M68000
#endif

#if (_MINIX_MACHINE == _MACHINE_SUN_4) || (_MINIX_MACHINE == _MACHINE_SUN_4_60)
#define _MINIX_CHIP          _CHIP_SPARC
#define _MINIX_FP_FORMAT   _FP_IEEE
#endif

#if (_MINIX_MACHINE == _MACHINE_ATARI) || (_MINIX_MACHINE == _MACHINE_SUN_4)
#define _ASKDEV            1	/* ask for boot device */
#define _FASTLOAD          1	/* use multiple block transfers to init ram */
#endif

#ifndef _MINIX_FP_FORMAT
#define _MINIX_FP_FORMAT   _FP_NONE
#endif

#ifndef _MINIX_MACHINE
error "In <minix/sys_config.h> please define _MINIX_MACHINE"
#endif

#ifndef _MINIX_CHIP
error "In <minix/sys_config.h> please define _MINIX_MACHINE to have a legal value"
#endif

#if (_MINIX_MACHINE == 0)
error "_MINIX_MACHINE has incorrect value (0)"
#endif

#endif /* _MINIX_SYS_CONFIG_H */