aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/acpi/realmode
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-16 10:10:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-16 10:10:02 -0700
commite7fd3b4669f5b835c8afce28425d9f698a558115 (patch)
treed7f254a1d75807cc8b50f416ba3bd13010913ddc /arch/x86/kernel/acpi/realmode
parentfc82e1d59a24cbac01c49d4eb3b28d6abc26a5f4 (diff)
parent2ae9d293b14d17f35eff624272cfecac7979a2ee (diff)
downloadkernel_samsung_tuna-e7fd3b4669f5b835c8afce28425d9f698a558115.zip
kernel_samsung_tuna-e7fd3b4669f5b835c8afce28425d9f698a558115.tar.gz
kernel_samsung_tuna-e7fd3b4669f5b835c8afce28425d9f698a558115.tar.bz2
Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Fix binutils-2.21 symbol related build failures x86-64, trampoline: Remove unused variable x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot x86, reboot: Move the real-mode reboot code to an assembly file x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly x86, trampoline: Use the unified trampoline setup for ACPI wakeup x86, trampoline: Common infrastructure for low memory trampolines Fix up trivial conflicts in arch/x86/kernel/Makefile
Diffstat (limited to 'arch/x86/kernel/acpi/realmode')
-rw-r--r--arch/x86/kernel/acpi/realmode/wakeup.S21
-rw-r--r--arch/x86/kernel/acpi/realmode/wakeup.h5
-rw-r--r--arch/x86/kernel/acpi/realmode/wakeup.lds.S28
3 files changed, 30 insertions, 24 deletions
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index 28595d6..ead21b6 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -6,11 +6,17 @@
#include <asm/page_types.h>
#include <asm/pgtable_types.h>
#include <asm/processor-flags.h>
+#include "wakeup.h"
.code16
- .section ".header", "a"
+ .section ".jump", "ax"
+ .globl _start
+_start:
+ cli
+ jmp wakeup_code
/* This should match the structure in wakeup.h */
+ .section ".header", "a"
.globl wakeup_header
wakeup_header:
video_mode: .short 0 /* Video mode number */
@@ -30,14 +36,11 @@ wakeup_jmp: .byte 0xea /* ljmpw */
wakeup_jmp_off: .word 3f
wakeup_jmp_seg: .word 0
wakeup_gdt: .quad 0, 0, 0
-signature: .long 0x51ee1111
+signature: .long WAKEUP_HEADER_SIGNATURE
.text
- .globl _start
.code16
wakeup_code:
-_start:
- cli
cld
/* Apparently some dimwit BIOS programmers don't know how to
@@ -77,12 +80,12 @@ _start:
/* Check header signature... */
movl signature, %eax
- cmpl $0x51ee1111, %eax
+ cmpl $WAKEUP_HEADER_SIGNATURE, %eax
jne bogus_real_magic
/* Check we really have everything... */
movl end_signature, %eax
- cmpl $0x65a22c82, %eax
+ cmpl $WAKEUP_END_SIGNATURE, %eax
jne bogus_real_magic
/* Call the C code */
@@ -147,3 +150,7 @@ wakeup_heap:
wakeup_stack:
.space 2048
wakeup_stack_end:
+
+ .section ".signature","a"
+end_signature:
+ .long WAKEUP_END_SIGNATURE
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.h b/arch/x86/kernel/acpi/realmode/wakeup.h
index 69d38d0..e1828c0 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.h
+++ b/arch/x86/kernel/acpi/realmode/wakeup.h
@@ -35,7 +35,8 @@ struct wakeup_header {
extern struct wakeup_header wakeup_header;
#endif
-#define HEADER_OFFSET 0x3f00
-#define WAKEUP_SIZE 0x4000
+#define WAKEUP_HEADER_OFFSET 8
+#define WAKEUP_HEADER_SIGNATURE 0x51ee1111
+#define WAKEUP_END_SIGNATURE 0x65a22c82
#endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.lds.S b/arch/x86/kernel/acpi/realmode/wakeup.lds.S
index 060fff8..d4f8010 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.lds.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.lds.S
@@ -13,9 +13,19 @@ ENTRY(_start)
SECTIONS
{
. = 0;
+ .jump : {
+ *(.jump)
+ } = 0x90909090
+
+ . = WAKEUP_HEADER_OFFSET;
+ .header : {
+ *(.header)
+ }
+
+ . = ALIGN(16);
.text : {
*(.text*)
- }
+ } = 0x90909090
. = ALIGN(16);
.rodata : {
@@ -33,11 +43,6 @@ SECTIONS
*(.data*)
}
- .signature : {
- end_signature = .;
- LONG(0x65a22c82)
- }
-
. = ALIGN(16);
.bss : {
__bss_start = .;
@@ -45,20 +50,13 @@ SECTIONS
__bss_end = .;
}
- . = HEADER_OFFSET;
- .header : {
- *(.header)
+ .signature : {
+ *(.signature)
}
- . = ALIGN(16);
_end = .;
/DISCARD/ : {
*(.note*)
}
-
- /*
- * The ASSERT() sink to . is intentional, for binutils 2.14 compatibility:
- */
- . = ASSERT(_end <= WAKEUP_SIZE, "Wakeup too big!");
}