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

• Lines: 85
• Date: Sun Apr 12 11:42:15 1998
• Orig file: v2.1.95/linux/arch/arm/mm/mm-rpc.c
• Orig date: Tue Jan 20 16:39:42 1998

diff -u --recursive --new-file v2.1.95/linux/arch/arm/mm/mm-rpc.c linux/arch/arm/mm/mm-rpc.c
@@ -6,7 +6,14 @@
  * Copyright (C) 1998 Russell King
  */
 
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <asm/pgtable.h>
 #include <asm/setup.h>
+#include <asm/io.h>
+#include <asm/proc/mm-init.h>
+#include <asm/arch/mm-init.h>
 
 #define NR_DRAM_BANKS	4
 #define NR_VRAM_BANKS	1
@@ -21,8 +28,8 @@
 #define FIRST_DRAM_ADDR	0x10000000
 
 #define PHYS_TO_BANK(x)	(((x) >> BANK_SHIFT) & (NR_DRAM_BANKS - 1))
-#define BANK_TO_PHYS(x)	((FIRST_DRAM_ADDR) +
-			    (((x) - FIRST_DRAM_BANK) << BANK_SHIFT)
+#define BANK_TO_PHYS(x)	((FIRST_DRAM_ADDR) + \
+			    (((x) - FIRST_DRAM_BANK) << BANK_SHIFT))
 
 struct ram_bank {
 	unsigned int virt_addr;		/* virtual address of the *end* of this bank + 1 */
@@ -75,6 +82,56 @@
 		rambank[bank].virt_addr   = PAGE_OFFSET + bytes;
 	}
 
-	drambank[4].phys_offset = 0xd6000000;
-	drambank[4].virt_addr   = 0xd8000000;
+	rambank[FIRST_VRAM_BANK].phys_offset = 0xd6000000;
+	rambank[FIRST_VRAM_BANK].virt_addr   = 0xd8000000;
+
+	current->tss.memmap = __virt_to_phys((unsigned long)swapper_pg_dir);
+}
+
+static struct mapping {
+	unsigned long virtual;
+	unsigned long physical;
+	unsigned long length;
+} io_mapping[] = {
+	{ SCREEN2_BASE,	SCREEN_START,	2*1048576	},	/* VRAM		*/
+	{ IO_BASE,	IO_START,	IO_SIZE		}	/* IO space	*/
+};
+
+#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) {
+			alloc_init_section(&start_mem, mp->virtual, mp->physical, DOMAIN_IO,
+					   PMD_SECT_AP_WRITE);
+			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;
 }