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- /* netIEMem.c -
- *
- * Routines to manage the control block memory for the ethernet board. All
- * of the memory lies in one big block. This block is divided up into equal
- * sized chunks and each chunk is allocated sequentially.
- *
- * Copyright 1985, 1988 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- *
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /cdrom/src/kernel/Cvsroot/kernel/net/sun4.md/netIEMem.c,v 9.2 90/10/19 15:47:23 jhh Exp $ SPRITE (Berkeley)";
- #endif
-
- #include <sprite.h>
- #include <sys.h>
- #include <list.h>
- #include <netIEInt.h>
- #include <vm.h>
- #include <vmMach.h>
- #include <stdio.h>
-
- static Address memAddr;
-
-
- /*
- *----------------------------------------------------------------------
- *
- * NetIEMemInit --
- *
- * Initialize the control block memory structures. This involves
- * allocating the memory and initializing the pointer to the
- * beginning of free memory.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Pointer to beginning of free memory list is initialized.
- *
- *----------------------------------------------------------------------
- */
-
- void
- NetIEMemInit(statePtr)
- NetIEState *statePtr;
- {
- if (!statePtr->running) {
- statePtr->memBase = (int) VmMach_NetMemAlloc(NET_IE_MEM_SIZE);
- printf("Initializing Intel memory at 0x%x.\n",statePtr->memBase);
- }
- memAddr = (Address) statePtr->memBase;
- return;
- }
-
-
- /*
- *----------------------------------------------------------------------
- *
- * NetIEMemAlloc --
- *
- * Return a pointer to the next free chunk of memory. Return NIL if none
- * left.
- *
- *
- * Results:
- * Pointer to next free chunk of memory, NIL if none left.
- *
- * Side effects:
- * Pointer to beginning of free memory is incremented.
- *
- *----------------------------------------------------------------------
- */
-
- Address
- NetIEMemAlloc(statePtr)
- NetIEState *statePtr;
- {
- Address addr;
-
- addr = memAddr;
- memAddr += NET_IE_CHUNK_SIZE;
- if (memAddr > (Address) (statePtr->memBase) + NET_IE_MEM_SIZE) {
- return((Address) NIL);
- }
-
- return(addr);
- }
-