patch-2.4.19 linux-2.4.19/arch/mips/sibyte/swarm/memory.c

• Lines: 49
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/sibyte/swarm/memory.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/sibyte/swarm/memory.c linux-2.4.19/arch/mips/sibyte/swarm/memory.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+/*
+ * Memory related routines 
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <asm/page.h>
+
+extern phys_t swarm_mem_region_addrs[];
+extern phys_t swarm_mem_region_sizes[];
+extern unsigned int swarm_mem_region_count;
+
+int page_is_ram(unsigned long pagenr)
+{
+	phys_t addr = pagenr << PAGE_SHIFT;
+#ifdef CONFIG_SWARM_STANDALONE
+	if (addr < (CONFIG_SIBYTE_SWARM_RAM_SIZE * 1024 * 1024)) {
+		return 1;
+	}
+#else
+	int i;
+	for (i = 0; i < swarm_mem_region_count; i++) {
+		if ((addr >= swarm_mem_region_addrs[i]) 
+		    && (addr < (swarm_mem_region_addrs[i] + swarm_mem_region_sizes[i]))) {
+			return 1;
+		}
+	}
+#endif
+	return 0;
+}