const.h

一个简单的操作系统minix的核心代码

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				src/mm/const.h	 	 
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15900	/* Constants used by the Memory Manager. */
15901	
15902	#define NO_MEM ((phys_clicks) 0)  /* returned by alloc_mem() with mem is up */
15903	
15904	#if (CHIP == INTEL && _WORD_SIZE == 2)
15905	/* These definitions are used in size_ok and are not needed for 386.
15906	 * The 386 segment granularity is 1 for segments smaller than 1M and 4096
15907	 * above that.  
15908	 */
15909	#define PAGE_SIZE         16    /* how many bytes in a page (s.b.HCLICK_SIZE)*/
15910	#define MAX_PAGES       4096    /* how many pages in the virtual addr space */
15911	#endif
15912	
15913	#define printf        printk
15914	
15915	#define INIT_PID           1    /* init's process id number */