x86: move suspend wakeup code to C

Move wakeup code to .c, so that video mode setting code can be shared
between boot and wakeup. Remove nasty assembly code in 64-bit case by
re-using trampoline code. Stack setup was fixed to clear high 16bits
of %esp, maybe that fixes some machines.

.c code sharing and morse code was done H. Peter Anvin, Sam Ravnborg
reviewed kbuild related stuff, and it seems okay to him. Rafael did
some cleanups.

[rjw:
* Made the patch stop breaking compilation on x86-32
* Added arch/x86/kernel/acpi/sleep.h
* Got rid of compiler warnings in arch/x86/kernel/acpi/sleep.c
* Fixed 32-bit compilation on x86-64 systems
* Added include/asm-x86/trampoline.h and fixed the non-SMP
  compilation on 64-bit x86
* Removed arch/x86/kernel/acpi/sleep_32.c which was not used
* Fixed some breakage caused by the integration of smpboot.c done
  under us in the meantime]

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/x86/boot/video-vga.c b/arch/x86/boot/video-vga.c
index 7259387b7d19..330d6589a2ad 100644
--- a/arch/x86/boot/video-vga.c
+++ b/arch/x86/boot/video-vga.c
@@ -210,6 +210,8 @@ static int vga_set_mode(struct mode_info *mode)
  */
 static int vga_probe(void)
 {
+        u16 ega_bx;
+
         static const char *card_name[] = {
                 "CGA/MDA/HGC", "EGA", "VGA"
         };
@@ -226,12 +228,16 @@ static int vga_probe(void)
         u8 vga_flag;
 
         asm(INT10
-            : "=b" (boot_params.screen_info.orig_video_ega_bx)
+            : "=b" (ega_bx)
             : "a" (0x1200), "b" (0x10) /* Check EGA/VGA */
             : "ecx", "edx", "esi", "edi");
 
+#ifndef _WAKEUP
+        boot_params.screen_info.orig_video_ega_bx = ega_bx;
+#endif
+
         /* If we have MDA/CGA/HGC then BL will be unchanged at 0x10 */
-        if ((u8)boot_params.screen_info.orig_video_ega_bx != 0x10) {
+        if ((u8)ega_bx != 0x10) {
                 /* EGA/VGA */
                 asm(INT10
                     : "=a" (vga_flag)
@@ -240,7 +246,9 @@ static int vga_probe(void)
 
                 if (vga_flag == 0x1a) {
                         adapter = ADAPTER_VGA;
+#ifndef _WAKEUP
                         boot_params.screen_info.orig_video_isVGA = 1;
+#endif
                 } else {
                         adapter = ADAPTER_EGA;
                 }