From 2a43f3ede48ea3d5790b863b719a1e21c90a3697 Mon Sep 17 00:00:00 2001
From: "Eric W. Biederman" <ebiederm@xmission.com>
Date: Thu, 7 Dec 2006 02:14:04 +0100
Subject: [PATCH] [PATCH] i386: CONFIG_PHYSICAL_START cleanup
Defining __PHYSICAL_START and __KERNEL_START in asm-i386/page.h works but
it triggers a full kernel rebuild for the silliest of reasons. This
modifies the users to directly use CONFIG_PHYSICAL_START and linux/config.h
which prevents the full rebuild problem, which makes the code much
more maintainer and hopefully user friendly.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/i386/boot/compressed/head.S | 7 +++----
arch/i386/boot/compressed/misc.c | 7 +++----
arch/i386/kernel/vmlinux.lds.S | 2 +-
include/asm-i386/page.h | 3 ---
4 files changed, 7 insertions(+), 12 deletions(-)
diff --git a/arch/i386/boot/compressed/head.S b/arch/i386/boot/compressed/head.S
index b5893e4ecd37..40a8de8270a9 100644
--- a/arch/i386/boot/compressed/head.S
+++ b/arch/i386/boot/compressed/head.S
@@ -25,7 +25,6 @@
#include <linux/linkage.h>
#include <asm/segment.h>
-#include <asm/page.h>
.globl startup_32
@@ -75,7 +74,7 @@ startup_32:
popl %esi # discard address
popl %esi # real mode pointer
xorl %ebx,%ebx
- ljmp $(__BOOT_CS), $__PHYSICAL_START
+ ljmp $(__BOOT_CS), $CONFIG_PHYSICAL_START
/*
* We come here, if we were loaded high.
@@ -100,7 +99,7 @@ startup_32:
popl %ecx # lcount
popl %edx # high_buffer_start
popl %eax # hcount
- movl $__PHYSICAL_START,%edi
+ movl $CONFIG_PHYSICAL_START,%edi
cli # make sure we don't get interrupted
ljmp $(__BOOT_CS), $0x1000 # and jump to the move routine
@@ -125,5 +124,5 @@ move_routine_start:
movsl
movl %ebx,%esi # Restore setup pointer
xorl %ebx,%ebx
- ljmp $(__BOOT_CS), $__PHYSICAL_START
+ ljmp $(__BOOT_CS), $CONFIG_PHYSICAL_START
move_routine_end:
diff --git a/arch/i386/boot/compressed/misc.c b/arch/i386/boot/compressed/misc.c
index b2ccd543410d..20970ff44119 100644
--- a/arch/i386/boot/compressed/misc.c
+++ b/arch/i386/boot/compressed/misc.c
@@ -13,7 +13,6 @@
#include <linux/vmalloc.h>
#include <linux/screen_info.h>
#include <asm/io.h>
-#include <asm/page.h>
/*
* gzip declarations
@@ -303,7 +302,7 @@ static void setup_normal_output_buffer(void)
#else
if ((RM_ALT_MEM_K > RM_EXT_MEM_K ? RM_ALT_MEM_K : RM_EXT_MEM_K) < 1024) error("Less than 2MB of memory");
#endif
- output_data = (unsigned char *)__PHYSICAL_START; /* Normally Points to 1M */
+ output_data = (unsigned char *)CONFIG_PHYSICAL_START; /* Normally Points to 1M */
free_mem_end_ptr = (long)real_mode;
}
@@ -326,8 +325,8 @@ static void setup_output_buffer_if_we_run_high(struct moveparams *mv)
low_buffer_size = low_buffer_end - LOW_BUFFER_START;
high_loaded = 1;
free_mem_end_ptr = (long)high_buffer_start;
- if ( (__PHYSICAL_START + low_buffer_size) > ((ulg)high_buffer_start)) {
- high_buffer_start = (uch *)(__PHYSICAL_START + low_buffer_size);
+ if ( (CONFIG_PHYSICAL_START + low_buffer_size) > ((ulg)high_buffer_start)) {
+ high_buffer_start = (uch *)(CONFIG_PHYSICAL_START + low_buffer_size);
mv->hcount = 0; /* say: we need not to move high_buffer */
}
else mv->hcount = -1;
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index c217e18f1081..f8d61ec4c8cb 100644
--- a/arch/i386/kernel/vmlinux.lds.S
+++ b/arch/i386/kernel/vmlinux.lds.S
@@ -27,7 +27,7 @@ PHDRS {
}
SECTIONS
{
- . = __KERNEL_START;
+ . = LOAD_OFFSET + CONFIG_PHYSICAL_START;
phys_startup_32 = startup_32 - LOAD_OFFSET;
/* read-only */
.text : AT(ADDR(.text) - LOAD_OFFSET) {
diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index 5a70501291d6..2b69686107ae 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -112,12 +112,9 @@ extern int page_is_ram(unsigned long pagenr);
#ifdef __ASSEMBLY__
#define __PAGE_OFFSET CONFIG_PAGE_OFFSET
-#define __PHYSICAL_START CONFIG_PHYSICAL_START
#else
#define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET)
-#define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
#endif
-#define __KERNEL_START (__PAGE_OFFSET + __PHYSICAL_START)
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
--
2.34.1