patch-2.1.96 linux/arch/arm/mm/mm-ebsa285.c

• Lines: 98
• Date: Sun Apr 12 11:42:15 1998
• Orig file: v2.1.95/linux/arch/arm/mm/mm-ebsa285.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.95/linux/arch/arm/mm/mm-ebsa285.c linux/arch/arm/mm/mm-ebsa285.c
@@ -0,0 +1,97 @@
+/*
+ * arch/arm/mm/mm-ebsa285.c
+ *
+ * Extra MM routines for the EBSA285 architecture
+ *
+ * Copyright (C) 1998 Russell King
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+ 
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/io.h>
+#include <asm/proc/mm-init.h>
+ 
+/*    Logical    Physical
+ * 0xfff00000	0x40000000	X-Bus
+ * 0xffe00000	0x7c000000	PCI I/O space
+ * 0xfe000000	0x42000000	CSR
+ * 0xfd000000	0x78000000	Outbound write flush
+ * 0xfc000000	0x79000000	PCI IACK/special space
+ * 0xf9000000	0x7a000000	PCI Config type 1
+ * 0xf8000000	0x7b000000	PCI Config type 0
+ */
+
+static struct mapping {
+	unsigned long virtual;
+	unsigned long physical;
+	unsigned long length;
+} io_mapping[] = {
+	/*
+	 * This is to allow us to fiddle with the EEPROM
+	 *  This entry will go away in time
+	 */
+	{ 0xd8000000, 0x41000000, 0x00400000 },
+
+	/*
+	 * These ones are so that we can fiddle
+	 *  with the various cards (eg VGA)
+	 *  until we're happy with them...
+	 */
+	{ 0xdc000000, 0x7c000000, 0x00100000 },
+	{ 0xe0000000, 0x80000000, 0x10000000 },
+
+	{ 0xf8000000, 0x7b000000, 0x01000000 },	/* Type 0 Config */
+
+	{ 0xf9000000, 0x7a000000, 0x01000000 },	/* Type 1 Config */
+
+	{ 0xfc000000, 0x79000000, 0x01000000 },	/* PCI IACK	 */
+	{ 0xfd000000, 0x78000000, 0x01000000 },	/* Outbound wflsh*/
+	{ 0xfe000000, 0x42000000, 0x01000000 },	/* CSR		 */
+	{ 0xffe00000, 0x7c000000, 0x00100000 },	/* PCI I/O	 */
+	{ 0xfff00000, 0x40000000, 0x00100000 },	/* X-Bus	 */
+};
+
+#define SIZEOFIO (sizeof(io_mapping) / sizeof(io_mapping[0]))
+
+/* map in IO */
+unsigned long setup_io_pagetables(unsigned long start_mem)
+{
+	struct mapping *mp;
+	int i;
+
+	for (i = 0, mp = io_mapping; i < SIZEOFIO; i++, mp++) {
+		while ((mp->virtual & 1048575 || mp->physical & 1048575) && mp->length >= PAGE_SIZE) {
+			alloc_init_page(&start_mem, mp->virtual, mp->physical, DOMAIN_IO,
+					PTE_AP_WRITE);
+
+			mp->length -= PAGE_SIZE;
+			mp->virtual += PAGE_SIZE;
+			mp->physical += PAGE_SIZE;
+		}
+
+		while (mp->length >= 1048576) {
+if (mp->virtual > 0xf0000000)
+			alloc_init_section(&start_mem, mp->virtual, mp->physical, DOMAIN_IO,
+					   PMD_SECT_AP_WRITE);
+else
+alloc_init_section(&start_mem, mp->virtual, mp->physical, DOMAIN_USER, PMD_SECT_AP_WRITE | PMD_SECT_AP_READ);
+
+			mp->length -= 1048576;
+			mp->virtual += 1048576;
+			mp->physical += 1048576;
+		}
+
+		while (mp->length >= PAGE_SIZE) {
+			alloc_init_page(&start_mem, mp->virtual, mp->physical, DOMAIN_IO,
+					PTE_AP_WRITE);
+
+			mp->length -= PAGE_SIZE;
+			mp->virtual += PAGE_SIZE;
+			mp->physical += PAGE_SIZE;
+		}
+	}
+	return start_mem;
+}
+