add directory study

study/linux-travel/MINIX-1.5/1.5/Source/amoeba/kernel/util.c

@@ -0,0 +1,50 @@
+#include "kernel.h"
+#include "minix/com.h"
+#include "proc.h"
+#include "dp8390.h"
+#include "assert.h"
+#include "dp8390info.h"
+
+#include "eplinfo.h"
+
+
+struct eplinfo eplinfo = {0x280};
+
+struct dp8390info dp8390info = {0x290, 6, 27, EPLUS_BASE, EPLUS_BASE};
+
+extern vir_bytes eplus_seg;
+
+
+#if !NONET
+getheader(paddr, pkthead)
+    phys_bytes paddr;
+    struct rcvdheader *pkthead;
+{
+  vir_bytes  offset;
+  char get_byte();
+
+  offset = (paddr - EPLUS_BASE)&0xFFFF;
+  pkthead->rp_status = get_byte(eplus_seg, offset);
+  pkthead->rp_next = get_byte(eplus_seg, offset+1);
+  pkthead->rp_rbcl = get_byte(eplus_seg, offset+2);
+  pkthead->rp_rbch = get_byte(eplus_seg, offset+3);
+}
+
+
+short
+getbint(paddr)
+    phys_bytes paddr;
+{
+  vir_bytes offset;
+  short t;
+    
+  offset = (paddr - EPLUS_BASE)&0xFFFF;
+  return (((short)get_byte(eplus_seg, offset) & 0xFF)<<8) + 
+	((short)get_byte(eplus_seg, offset+1) & 0xFF);
+}
+#endif
+
+
+
+
+