boot.h

一个简单的操作系统minix的核心代码

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				include/minix/boot.h	 	 
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03700	/* boot.h */
03701	
03702	#ifndef _BOOT_H
03703	#define _BOOT_H
03704	
03705	/* Redefine root and root image devices as variables.
03706	 * This keeps the diffs small but may cause future confusion.
03707	 */
03708	#define ROOT_DEV   (boot_parameters.bp_rootdev)
03709	#define IMAGE_DEV  (boot_parameters.bp_ramimagedev)
03710	
03711	/* Device numbers of RAM, floppy and hard disk devices.
03712	 * h/com.h defines RAM_DEV but only as the minor number.
03713	 */
03714	#define DEV_FD0   0x200
03715	#define DEV_HD0   0x300
03716	#define DEV_RAM   0x100
03717	#define DEV_SCSI  0x700 /* Atari TT only */
03718	
03719	/* Structure to hold boot parameters. */
03720	struct bparam_s
03721	{
03722	  dev_t bp_rootdev;
03723	  dev_t bp_ramimagedev;
03724	  unsigned short bp_ramsize;
03725	  unsigned short bp_processor;
03726	};
03727	
03728	extern struct bparam_s boot_parameters;
03729	#endif /* _BOOT_H */