5 files changed, 36 insertions, 52 deletions

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 299bc0468702..64cf480b0b02 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -8,7 +8,7 @@
 # Copyright (C) 1995-2001 by Russell King
 
 LDFLAGS_vmlinux :=-p --no-undefined -X
-CPPFLAGS_vmlinux.lds = -DTEXTADDR=$(TEXTADDR) -DDATAADDR=$(DATAADDR)
+CPPFLAGS_vmlinux.lds = -DKERNEL_RAM_ADDR=$(TEXTADDR)
 OBJCOPYFLAGS    :=-O binary -R .note -R .comment -S
 GZFLAGS         :=-9
 #CFLAGS         +=-pipe
@@ -108,27 +108,19 @@ export CFLAGS_3c589_cs.o
 endif
 
 TEXTADDR := $(textaddr-y)
-ifeq ($(CONFIG_XIP_KERNEL),y)
-  DATAADDR := $(TEXTADDR)
-  xipaddr-$(CONFIG_ARCH_CO285) := 0x5f000000
-  xipaddr-y ?= 0xbf000000
-  # Replace phys addr with virt addr while keeping offset from base.
-  TEXTADDR := $(shell echo $(CONFIG_XIP_PHYS_ADDR) $(xipaddr-y) | \
-                      awk --non-decimal-data '/[:xdigit:]/ \
-                          { printf("0x%x\n", and($$1, 0x000fffff) + $$2) }' )
-endif
 
 ifeq ($(incdir-y),)
 incdir-y := $(machine-y)
 endif
 INCDIR   := arch-$(incdir-y)
+
 ifneq ($(machine-y),)
 MACHINE  := arch/arm/mach-$(machine-y)/
 else
 MACHINE  :=
 endif
   
-export  TEXTADDR DATAADDR GZFLAGS
+export  TEXTADDR GZFLAGS
 
 # Do we have FASTFPE?
 FASTFPE         :=arch/arm/fastfpe
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 3e1b0327e4d7..c11169b5ed9a 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR) -DDATAADDR=$(DATAADDR)
+AFLAGS_head.o := -DKERNEL_RAM_ADDR=$(TEXTADDR)
 
 # Object file lists.
 
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index dd5d0f07d358..8d8748407cbe 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -34,52 +34,28 @@
 #define MACHINFO_PGOFFIO        12
 #define MACHINFO_NAME           16
 
-#ifndef CONFIG_XIP_KERNEL
 /*
- * We place the page tables 16K below TEXTADDR.  Therefore, we must make sure
- * that TEXTADDR is correctly set.  Currently, we expect the least significant
- * 16 bits to be 0x8000, but we could probably relax this restriction to
- * TEXTADDR >= PAGE_OFFSET + 0x4000
- *
- * Note that swapper_pg_dir is the virtual address of the page tables, and
- * pgtbl gives us a position-independent reference to these tables.  We can
- * do this because stext == TEXTADDR
+ * swapper_pg_dir is the virtual address of the initial page table.
+ * We place the page tables 16K below KERNEL_RAM_ADDR.  Therefore, we must
+ * make sure that KERNEL_RAM_ADDR is correctly set.  Currently, we expect
+ * the least significant 16 bits to be 0x8000, but we could probably
+ * relax this restriction to KERNEL_RAM_ADDR >= PAGE_OFFSET + 0x4000.
  */
-#if (TEXTADDR & 0xffff) != 0x8000
-#error TEXTADDR must start at 0xXXXX8000
+#if (KERNEL_RAM_ADDR & 0xffff) != 0x8000
+#error KERNEL_RAM_ADDR must start at 0xXXXX8000
 #endif
 
         .globl  swapper_pg_dir
-        .equ    swapper_pg_dir, TEXTADDR - 0x4000
+        .equ    swapper_pg_dir, KERNEL_RAM_ADDR - 0x4000
 
-        .macro  pgtbl, rd, phys
-        adr     \rd, stext
-        sub     \rd, \rd, #0x4000
+        .macro  pgtbl, rd
+        ldr     \rd, =(__virt_to_phys(KERNEL_RAM_ADDR - 0x4000))
         .endm
-#else
-/*
- * XIP Kernel:
- *
- * We place the page tables 16K below DATAADDR.  Therefore, we must make sure
- * that DATAADDR is correctly set.  Currently, we expect the least significant
- * 16 bits to be 0x8000, but we could probably relax this restriction to
- * DATAADDR >= PAGE_OFFSET + 0x4000
- *
- * Note that pgtbl is meant to return the physical address of swapper_pg_dir.
- * We can't make it relative to the kernel position in this case since
- * the kernel can physically be anywhere.
- */
-#if (DATAADDR & 0xffff) != 0x8000
-#error DATAADDR must start at 0xXXXX8000
-#endif
-
-        .globl  swapper_pg_dir
-        .equ    swapper_pg_dir, DATAADDR - 0x4000
 
-        .macro  pgtbl, rd, phys
-        ldr     \rd, =((DATAADDR - 0x4000) - PAGE_OFFSET)
-        add     \rd, \rd, \phys
-        .endm
+#ifdef CONFIG_XIP_KERNEL
+#define TEXTADDR  XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+#else
+#define TEXTADDR  KERNEL_RAM_ADDR
 #endif
 
 /*
@@ -280,7 +256,7 @@ __turn_mmu_on:
         .type   __create_page_tables, %function
 __create_page_tables:
         ldr     r5, [r8, #MACHINFO_PHYSRAM]     @ physram
-        pgtbl   r4, r5                          @ page table address
+        pgtbl   r4                              @ page table address
 
         /*
          * Clear the 16K level 1 swapper page table
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 0d5db5279c5c..80c8e4c8cefa 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -6,14 +6,23 @@
 #include <asm-generic/vmlinux.lds.h>
 #include <linux/config.h>
 #include <asm/thread_info.h>
+#include <asm/memory.h>
         
 OUTPUT_ARCH(arm)
 ENTRY(stext)
+
 #ifndef __ARMEB__
 jiffies = jiffies_64;
 #else
 jiffies = jiffies_64 + 4;
 #endif
+
+#ifdef CONFIG_XIP_KERNEL
+#define TEXTADDR  XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+#else
+#define TEXTADDR  KERNEL_RAM_ADDR
+#endif
+
 SECTIONS
 {
         . = TEXTADDR;
@@ -95,7 +104,7 @@ SECTIONS
 
 #ifdef CONFIG_XIP_KERNEL
         __data_loc = ALIGN(4);          /* location in binary */
-        . = DATAADDR;
+        . = KERNEL_RAM_ADDR;
 #else
         . = ALIGN(THREAD_SIZE);
         __data_loc = .;
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index bee10fcf7e83..a547ee598c6c 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -68,6 +68,13 @@
 #error Top of user space clashes with start of module space
 #endif
 
+/*
+ * The XIP kernel gets mapped at the bottom of the module vm area.
+ * Since we use sections to map it, this macro replaces the physical address
+ * with its virtual address while keeping offset from the base section.
+ */
+#define XIP_VIRT_ADDR(physaddr)  (MODULE_START + ((physaddr) & 0x000fffff))
+
 #ifndef __ASSEMBLY__
 
 /*