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[ARM] Make kernel link address depend on PAGE_OFFSET

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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>
This commit is contained in:
Russell King
2006-01-03 17:28:33 +00:00
committed by Russell King
parent 88026842b0
commit 9d4f13e531
5 changed files with 17 additions and 18 deletions
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2
arch/arm/kernel/Makefile
View File

@@ -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.

2
arch/arm/kernel/head.S
View File

@@ -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

14
arch/arm/kernel/vmlinux.lds.S
View File

@@ -17,15 +17,13 @@ jiffies = jiffies_64;
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;
#ifdef CONFIG_XIP_KERNEL
. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
#else
. = PAGE_OFFSET + TEXT_OFFSET;
#endif
.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 = .;