patch-2.1.9 linux/arch/sparc/mm/generic.c

• Lines: 42
• Date: Sat Nov 9 10:12:16 1996
• Orig file: v2.1.8/linux/arch/sparc/mm/generic.c
• Orig date: Thu Apr 25 13:22:05 1996

diff -u --recursive --new-file v2.1.8/linux/arch/sparc/mm/generic.c linux/arch/sparc/mm/generic.c
@@ -1,4 +1,4 @@
-/* $Id: generic.c,v 1.2 1996/04/25 06:09:30 davem Exp $
+/* $Id: generic.c,v 1.4 1996/10/27 08:36:41 davem Exp $
  * generic.c: Generic Sparc mm routines that are not dependent upon
  *            MMU type but are Sparc specific.
  *
@@ -12,13 +12,34 @@
 #include <asm/pgtable.h>
 #include <asm/page.h>
 
+
+/* Allocate a block of RAM which is aligned to its size.
+ * This procedure can be used until the call to mem_init().
+ */
+void *sparc_init_alloc(unsigned long *kbrk, unsigned long size)
+{
+        unsigned long mask = size - 1;
+        unsigned long ret;
+
+        if(!size)
+                return 0x0;
+        if(size & mask) {
+                prom_printf("panic: sparc_init_alloc botch\n");
+                prom_halt();
+        }
+        ret = (*kbrk + mask) & ~mask;
+        *kbrk = ret + size;
+        memset((void*) ret, 0, size);
+        return (void*) ret;
+}
+
 static inline void forget_pte(pte_t page)
 {
 	if (pte_none(page))
 		return;
 	if (pte_present(page)) {
 		unsigned long addr = pte_page(page);
-		if (addr >= high_memory || PageReserved(mem_map+MAP_NR(addr)))
+		if (MAP_NR(addr) >= max_mapnr || PageReserved(mem_map+MAP_NR(addr)))
 			return;
 		free_page(addr);
 		if (current->mm->rss <= 0)