patch-2.4.5 linux/arch/ppc/amiga/chipram.c

• Lines: 187
• Date: Mon May 21 17:04:46 2001
• Orig file: v2.4.4/linux/arch/ppc/amiga/chipram.c
• Orig date: Tue Jul 11 11:18:53 2000

diff -u --recursive --new-file v2.4.4/linux/arch/ppc/amiga/chipram.c linux/arch/ppc/amiga/chipram.c
@@ -1,183 +1,4 @@
 /*
-**  linux/amiga/chipram.c
-**
-**      Modified 03-May-94 by Geert Uytterhoeven <geert@linux-m68k.org>
-**          - 64-bit aligned allocations for full AGA compatibility
-*/
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/zorro.h>
-#include <asm/amigahw.h>
-
-struct chip_desc {
-	unsigned first   :  1;
-	unsigned last    :  1;
-	unsigned alloced :  1;
-	unsigned length  : 24;
-	long pad;					/* We suppose this makes this struct 64 bits long!! */
-};
-
-#define DP(ptr) ((struct chip_desc *)(ptr))
-
-u_long amiga_chip_size;
-static unsigned long chipavail;
-
-static struct resource chipram = { "Chip RAM", 0 };
-
-unsigned long amiga_chip_avail( void )
-{
-#ifdef DEBUG
-	printk("chip_avail : %ld bytes\n",chipavail);
-#endif
-	return chipavail;
-}
-
-
-void __init amiga_chip_init (void)
-{
-  struct chip_desc *dp;
-
-  if (!AMIGAHW_PRESENT(CHIP_RAM))
-    return;
-
-#ifndef CONFIG_APUS_FAST_EXCEPT
-  /*
-   * Remove the first 4 pages where PPC exception handlers will
-   * be located.
-   */
-  amiga_chip_size -= 0x4000;
-#endif
-  chipram.end = amiga_chip_size-1;
-  request_resource(&iomem_resource, &chipram);
-
-  /* initialize start boundary */
-
-  dp = DP(chipaddr);
-  dp->first = 1;
-
-  dp->alloced = 0;
-  dp->length = amiga_chip_size - 2*sizeof(*dp);
-
-  /* initialize end boundary */
-  dp = DP(chipaddr + amiga_chip_size) - 1;
-  dp->last = 1;
-  
-  dp->alloced = 0;
-  dp->length = amiga_chip_size - 2*sizeof(*dp);
-  chipavail = dp->length;  /*MILAN*/
-
-#ifdef DEBUG
-  printk ("chipram end boundary is %p, length is %d\n", dp,
-	  dp->length);
-#endif
-}
-
-void *amiga_chip_alloc(long size, const char *name)
-{
-	/* last chunk */
-	struct chip_desc *dp;
-	void *ptr;
-
-	/* round off */
-	size = (size + 7) & ~7;
-
-#ifdef DEBUG
-   printk("amiga_chip_alloc: allocate %ld bytes\n", size);
-#endif
-
-	/*
-	 * get pointer to descriptor for last chunk by 
-	 * going backwards from end chunk
-	 */
-	dp = DP(chipaddr + amiga_chip_size) - 1;
-	dp = DP((unsigned long)dp - dp->length) - 1;
-	
-	while ((dp->alloced || dp->length < size)
-	       && !dp->first)
-		dp = DP ((unsigned long)dp - dp[-1].length) - 2;
-
-	if (dp->alloced || dp->length < size) {
-		printk ("no chipmem available for %ld allocation\n", size);
-		return NULL;
-	}
-
-	if (dp->length < (size + 2*sizeof(*dp))) {
-		/* length too small to split; allocate the whole thing */
-		dp->alloced = 1;
-		ptr = (void *)(dp+1);
-		dp = DP((unsigned long)ptr + dp->length);
-		dp->alloced = 1;
-#ifdef DEBUG
-		printk ("amiga_chip_alloc: no split\n");
-#endif
-	} else {
-		/* split the extent; use the end part */
-		long newsize = dp->length - (2*sizeof(*dp) + size);
-
-#ifdef DEBUG
-		printk ("amiga_chip_alloc: splitting %d to %ld\n", dp->length,
-			newsize);
-#endif
-		dp->length = newsize;
-		dp = DP((unsigned long)(dp+1) + newsize);
-		dp->first = dp->last = 0;
-		dp->alloced = 0;
-		dp->length = newsize;
-		dp++;
-		dp->first = dp->last = 0;
-		dp->alloced = 1;
-		dp->length = size;
-		ptr = (void *)(dp+1);
-		dp = DP((unsigned long)ptr + size);
-		dp->alloced = 1;
-		dp->length = size;
-	}
-
-#ifdef DEBUG
-	printk ("amiga_chip_alloc: returning %p\n", ptr);
-#endif
-
-	if ((unsigned long)ptr & 7)
-		panic("amiga_chip_alloc: alignment violation\n");
-
-    chipavail -= size + (2*sizeof(*dp)); /*MILAN*/
-
-    if (!request_mem_region(ZTWO_PADDR(ptr), size, name))
-	printk(KERN_WARNING "amiga_chip_alloc: region of size %ld at 0x%08lx "
-	       "is busy\n", size, ZTWO_PADDR(ptr));
-
-    return ptr;
-}
-
-void amiga_chip_free (void *ptr)
-{
-	struct chip_desc *sdp = DP(ptr) - 1, *dp2;
-	struct chip_desc *edp = DP((unsigned long)ptr + sdp->length);
-
-    chipavail += sdp->length + (2* sizeof(sdp)); /*MILAN*/
-#ifdef DEBUG
-   printk("chip_free: free %ld bytes at %p\n",sdp->length,ptr);
-#endif
-	/* deallocate the chunk */
-	sdp->alloced = edp->alloced = 0;
-	release_mem_region(ZTWO_PADDR(ptr), sdp->length);
-
-	/* check if we should merge with the previous chunk */
-	if (!sdp->first && !sdp[-1].alloced) {
-		dp2 = DP((unsigned long)sdp - sdp[-1].length) - 2;
-		dp2->length += sdp->length + 2*sizeof(*sdp);
-		edp->length = dp2->length;
-		sdp = dp2;
-	}
-
-	/* check if we should merge with the following chunk */
-	if (!edp->last && !edp[1].alloced) {
-		dp2 = DP((unsigned long)edp + edp[1].length) + 2;
-		dp2->length += edp->length + 2*sizeof(*sdp);
-		sdp->length = dp2->length;
-		edp = dp2;
-	}
-}
+ * BK Id: SCCS/s.chipram.c 1.7 05/21/01 00:49:49 cort
+ */
+#include "../../m68k/amiga/chipram.c"