Add a standalone routine for fetching the memory size from the

core module on an ARM Integrator board.
2002-04-18 05:30:45 +00:00 · 2002-04-18 05:30:45 +00:00 · 0f3cb4bcae
parent 86920876dd
commit 0f3cb4bcae
1 changed files with 90 additions and 0 deletions
--- a/sys/arch/evbarm/stand/board/integrator_mem.c
+++ b/sys/arch/evbarm/stand/board/integrator_mem.c
@ -0,0 +1,90 @@
+/*	$NetBSD: integrator_mem.c,v 1.1 2002/04/18 05:30:45 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 2002 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file provides the mem_init() function for ARM Integrator
+ * core modules.
+ */
+
+#include <sys/types.h>
+#include <lib/libsa/stand.h>
+
+#include "board.h"
+
+#define	INL(x)		*((__volatile uint32_t *) (x))
+
+void
+mem_init(void)
+{
+	uint32_t cm_sdram;
+	uint32_t heap, size;
+
+	cm_sdram = INL(0x10000020);
+
+	switch ((cm_sdram >> 2) & 0x7) {
+	case 0:
+		size = 16 * 1024 * 1024;
+		break;
+
+	case 1:
+		size = 32 * 1024 * 1024;
+		break;
+
+	case 2:
+		size = 64 * 1024 * 1024;
+		break;
+
+	case 3:
+		size = 128 * 1024 * 1024;
+		break;
+
+	case 4:
+		size = 256 * 1024 * 1024;
+		break;
+
+	default:
+		printf("** CM_SDRAM retuns unknown value, using 16M\n");
+		size = 16 * 1024 * 1024;
+		break;
+	}
+
+	/* Start is always 0. */
+	heap = size - 0x30000;
+
+	printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n", 0, size - 1, heap);
+	setheap((void *)heap, (void *)size);
+}