1993/0915/pc/scsi.c (diff list | history)

pc/scsi.c on 1993/0915
1993/0915		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "../port/error.h" /* * Known to devscsi.c. int scsidebugs[8]; int scsiownid = CtlrID; */ void initscsi(void) { } /* * Quick hack. Need to do a better job of dynamic initialisation * for machines with peculiar memory/cache restictions. * Also, what about 16Mb address limit on the Adaptec? */ static ulong bufdatasize; void scsibufreset(ulong datasize) { bufdatasize = datasize; } Scsibuf * scsibuf(void) { Scsibuf *b; b = smalloc(sizeof(*b)); b->virt = smalloc(bufdatasize); b->phys = (void *)(PADDR(b->virt)); return b; } void scsifree(Scsibuf *b) { free(b->virt); free(b); } /* * Hack for devvid */ Scsibuf * scsialloc(ulong n) { Scsibuf *b; b = smalloc(sizeof(*b)); b->virt = smalloc(n); b->phys = (void *)(PADDR(b->virt)); return b; } extern int (*aha1542reset(void))(Scsi*, int); extern int (*ultra14freset(void))(Scsi*, int); static int (*exec)(Scsi*, int); int scsiexec(Scsi *p, int rflag) { if(exec == 0) error(Enonexist); return (*exec)(p, rflag); } void resetscsi(void) { if(exec = aha1542reset()) return; exec = ultra14freset(); }