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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-01-03 17:28:33 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-03 17:28:33 +0000
commit9d4f13e531b4722fe40cc8e28c02a495bdd49267 (patch)
tree4fe18552620677dbe4f6831c4d9d0ecdb34e678a
parent88026842b0a760145aa71d69e74fbc9ec118ca44 (diff)
downloadlinux-9d4f13e531b4722fe40cc8e28c02a495bdd49267.tar.bz2
[ARM] Make kernel link address depend on PAGE_OFFSET
We are coding the kernel link address into the makefiles, which is invisibly dependent on PAGE_OFFSET. If PAGE_OFFSET is changed, the makefiles also need to be changed. Make adjustments such that the makefiles encode just the offset from PAGE_OFFSET for the kernel link address, and use PAGE_OFFSET in the linker scripts directly. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/Makefile15
-rw-r--r--arch/arm/boot/Makefile2
-rw-r--r--arch/arm/kernel/Makefile2
-rw-r--r--arch/arm/kernel/head.S2
-rw-r--r--arch/arm/kernel/vmlinux.lds.S12
5 files changed, 16 insertions, 17 deletions
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 81bd2193fe6d..afaf3a1e903c 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 = -DKERNEL_RAM_ADDR=$(TEXTADDR)
+CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
OBJCOPYFLAGS :=-O binary -R .note -R .comment -S
GZFLAGS :=-9
#CFLAGS +=-pipe
@@ -65,7 +65,7 @@ CHECKFLAGS += -D__arm__
#Default value
head-y := arch/arm/kernel/head.o arch/arm/kernel/init_task.o
-textaddr-y := 0xC0008000
+textofs-y := 0x00008000
machine-$(CONFIG_ARCH_RPC) := rpc
machine-$(CONFIG_ARCH_EBSA110) := ebsa110
@@ -73,22 +73,20 @@ textaddr-y := 0xC0008000
incdir-$(CONFIG_ARCH_CLPS7500) := cl7500
machine-$(CONFIG_FOOTBRIDGE) := footbridge
incdir-$(CONFIG_FOOTBRIDGE) := ebsa285
-textaddr-$(CONFIG_ARCH_CO285) := 0x60008000
machine-$(CONFIG_ARCH_CO285) := footbridge
incdir-$(CONFIG_ARCH_CO285) := ebsa285
machine-$(CONFIG_ARCH_SHARK) := shark
machine-$(CONFIG_ARCH_SA1100) := sa1100
ifeq ($(CONFIG_ARCH_SA1100),y)
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
-textaddr-$(CONFIG_SA1111) := 0xc0208000
+ textofs-$(CONFIG_SA1111) := 0x00208000
endif
machine-$(CONFIG_ARCH_PXA) := pxa
machine-$(CONFIG_ARCH_L7200) := l7200
machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
machine-$(CONFIG_ARCH_CAMELOT) := epxa10db
-textaddr-$(CONFIG_ARCH_CLPS711X) := 0xc0028000
+ textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000
machine-$(CONFIG_ARCH_CLPS711X) := clps711x
-textaddr-$(CONFIG_ARCH_FORTUNET) := 0xc0008000
machine-$(CONFIG_ARCH_IOP3XX) := iop3xx
machine-$(CONFIG_ARCH_IXP4XX) := ixp4xx
machine-$(CONFIG_ARCH_IXP2000) := ixp2000
@@ -110,7 +108,8 @@ CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
export CFLAGS_3c589_cs.o
endif
-TEXTADDR := $(textaddr-y)
+# The byte offset of the kernel image in RAM from the start of RAM.
+TEXT_OFFSET := $(textofs-y)
ifeq ($(incdir-y),)
incdir-y := $(machine-y)
@@ -123,7 +122,7 @@ else
MACHINE :=
endif
-export TEXTADDR GZFLAGS
+export TEXT_OFFSET GZFLAGS
# Do we have FASTFPE?
FASTFPE :=arch/arm/fastfpe
diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index 937a353bc37c..a174d63395ea 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -15,7 +15,7 @@ include $(srctree)/$(MACHINE)/Makefile.boot
endif
# Note: the following conditions must always be true:
-# ZRELADDR == virt_to_phys(TEXTADDR)
+# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
# PARAMS_PHYS must be within 4MB of ZRELADDR
# INITRD_PHYS must be in RAM
ZRELADDR := $(zreladdr-y)
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index c11169b5ed9a..25b14c3fdc4a 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-AFLAGS_head.o := -DKERNEL_RAM_ADDR=$(TEXTADDR)
+AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Object file lists.
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index d7d69fd7039f..1e985f2cd70f 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -33,6 +33,8 @@
#define MACHINFO_PGOFFIO 12
#define MACHINFO_NAME 16
+#define KERNEL_RAM_ADDR (PAGE_OFFSET + TEXT_OFFSET)
+
/*
* 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
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 9a47770114d4..2b254e88595c 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -17,15 +17,13 @@ jiffies = jiffies_64;
jiffies = jiffies_64 + 4;
#endif
+SECTIONS
+{
#ifdef CONFIG_XIP_KERNEL
-#define TEXTADDR XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR)
+ . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
#else
-#define TEXTADDR KERNEL_RAM_ADDR
+ . = PAGE_OFFSET + TEXT_OFFSET;
#endif
-
-SECTIONS
-{
- . = TEXTADDR;
.init : { /* Init code and data */
_stext = .;
_sinittext = .;
@@ -104,7 +102,7 @@ SECTIONS
#ifdef CONFIG_XIP_KERNEL
__data_loc = ALIGN(4); /* location in binary */
- . = KERNEL_RAM_ADDR;
+ . = PAGE_OFFSET + TEXT_OFFSET;
#else
. = ALIGN(THREAD_SIZE);
__data_loc = .;