patch-2.4.19 linux-2.4.19/arch/arm/mach-clps711x/edb7211-mm.c

• Lines: 75
• Date: Fri Aug 2 17:39:42 2002
• Orig file: linux-2.4.18/arch/arm/mach-clps711x/edb7211-mm.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/arm/mach-clps711x/edb7211-mm.c linux-2.4.19/arch/arm/mach-clps711x/edb7211-mm.c
@@ -0,0 +1,74 @@
+/*
+ *  linux/arch/arm/mach-clps711x/mm.c
+ *
+ *  Extra MM routines for the EDB7211 board
+ *
+ *  Copyright (C) 2000, 2001 Blue Mug, Inc.  All Rights Reserved.
+ *
+ * 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
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+ 
+#include <asm/mach/map.h>
+
+#define MB1 1048576	/* one megabyte == size of an MMU section */
+
+extern void clps711x_map_io(void);
+
+/*
+ * The on-chip registers are given a size of 1MB so that a section can
+ * be used to map them; this saves a page table.  This is the place to
+ * add mappings for ROM, expansion memory, PCMCIA, etc.  (if static
+ * mappings are chosen for those areas).
+ *
+ * Here is a physical memory map (to be fleshed out later):
+ *
+ * Physical Address  Size  Description
+ * ----------------- ----- ---------------------------------
+ * c0000000-c001ffff 128KB reserved for video RAM [1]
+ * c0020000-c0023fff  16KB parameters (see Documentation/arm/Setup)
+ * c0024000-c0027fff  16KB swapper_pg_dir (task 0 page directory)
+ * c0028000-...            kernel image (TEXTADDR)
+ *
+ * [1] Unused pages should be given back to the VM; they are not yet.
+ *     The parameter block should also be released (not sure if this
+ *     happens).
+ */
+static struct map_desc edb7211_io_desc[] __initdata = {
+ /* virtual, physical, length, domain, r, w, c, b */
+
+ /* memory-mapped extra keyboard row and CS8900A Ethernet chip */
+ { EP7211_VIRT_EXTKBD, EP7211_PHYS_EXTKBD, MB1, DOMAIN_IO, 1, 1, 0, 0 }, 
+ { EP7211_VIRT_CS8900A, EP7211_PHYS_CS8900A, MB1, DOMAIN_IO, 1, 1, 0, 0 },
+
+ /* flash banks */
+ { EP7211_VIRT_FLASH1, EP7211_PHYS_FLASH1, MB1 * 8, DOMAIN_KERNEL, 1, 1, 0, 0 },
+ { EP7211_VIRT_FLASH2, EP7211_PHYS_FLASH2, MB1 * 8, DOMAIN_KERNEL, 1, 1, 0, 0 },
+
+ LAST_DESC
+};
+
+void __init edb7211_map_io(void)
+{
+        clps711x_map_io();
+        iotable_init(edb7211_io_desc);
+}
+