wini.c

一个简单的操作系统minix的核心代码

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				src/kernel/wini.c	 	 
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10000	/*      wini.c - choose a winchester driver.            Author: Kees J. Bot
10001	 *                                                              28 May 1994
10002	 * Several different winchester drivers may be compiled
10003	 * into the kernel, but only one may run.  That one is chosen here using
10004	 * the boot variable 'hd'.
10005	 */
10006	
10007	#include "kernel.h"
10008	#include "driver.h"
10009	
10010	#if ENABLE_WINI
10011	
10012	/* Map driver name to task function. */
10013	struct hdmap {
10014	  char          *name;
10015	  task_t        *task;
10016	} hdmap[] = {
10017	
10018	#if ENABLE_AT_WINI
10019	  { "at",       at_winchester_task      },
10020	#endif
10021	
10022	#if ENABLE_BIOS_WINI
10023	  { "bios",     bios_winchester_task    },
10024	#endif
10025	
10026	#if ENABLE_ESDI_WINI
10027	  { "esdi",     esdi_winchester_task    },
10028	#endif
10029	
10030	#if ENABLE_XT_WINI
10031	  { "xt",       xt_winchester_task      },
10032	#endif
10033	
10034	};
10035	
10036	
10037	/*===========================================================================*
10038	 *                              winchester_task                              *
10039	 *===========================================================================*/
10040	PUBLIC void winchester_task()
10041	{
10042	  /* Call the default or selected winchester task. */
10043	  char *hd;
10044	  struct hdmap *map;
10045	
10046	  hd = k_getenv("hd");
10047	
10048	  for (map = hdmap; map < hdmap + sizeof(hdmap)/sizeof(hdmap[0]); map++) {
10049	        if (hd == NULL || strcmp(hd, map->name) == 0) {
10050	                /* Run the selected winchester task. */
10051	                (*map->task)();
10052	        }
10053	  }
10054	  panic("no hd driver", NO_NUM);
10055	}
10056	#endif /* ENABLE_WINI */