x86, realmode: header for trampoline code
Added header for trampoline code that can be used to supply
input data to it. This makes interface between real mode code
and kernel cleaner and simpler. Replaced two confusing pointers
to level4 pgt in trampoline_64.S with a single pointer to the
beginning of the page table.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-21-git-send-email-jarkko.sakkinen@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/realmode/rm/header.S b/arch/x86/realmode/rm/header.S
index c83005c..b4c3263 100644
--- a/arch/x86/realmode/rm/header.S
+++ b/arch/x86/realmode/rm/header.S
@@ -7,28 +7,25 @@
#include <linux/linkage.h>
#include <asm/page_types.h>
- .section ".header", "a"
+ .section ".header", "a"
GLOBAL(real_mode_header)
- .long pa_text_start
- .long pa_ro_end
-#ifdef CONFIG_X86_32
- .long pa_machine_real_restart_asm
+ .long pa_text_start
+ .long pa_ro_end
+ /* SMP trampoline */
+ .long pa_trampoline_start
+ .long pa_trampoline_status
+ .long pa_trampoline_header
+#ifdef CONFIG_X86_64
+ .long pa_trampoline_pgd;
#endif
- /* SMP trampoline */
- .long pa_trampoline_data
- .long pa_trampoline_status
-#ifdef CONFIG_X86_32
- .long pa_startup_32_smp
- .long pa_boot_gdt
-#else
- .long pa_startup_64_smp
- .long pa_level3_ident_pgt
- .long pa_level3_kernel_pgt
-#endif
- /* ACPI sleep */
+ /* ACPI S3 wakeup */
#ifdef CONFIG_ACPI_SLEEP
- .long pa_wakeup_start
- .long pa_wakeup_header
+ .long pa_wakeup_start
+ .long pa_wakeup_header
+#endif
+ /* APM/BIOS reboot */
+#ifdef CONFIG_X86_32
+ .long pa_machine_real_restart_asm
#endif
END(real_mode_header)