Pavel Machek wrote:
diff --git a/arch/x86/kernel/acpi/rm/wakemain.c
b/arch/x86/kernel/acpi/rm/wakemain.c
new file mode 100644
index 0000000..d3173cc
--- /dev/null
+++ b/arch/x86/kernel/acpi/rm/wakemain.c
@@ -0,0 +1,18 @@
+#include "wakeup.h"
+#include "boot.h"
+
+extern struct wakeup_header wakeup_header;
+
+void main(void)
+{
+ asm volatile("lcallw $0xc000,$3; movw %cs, %ax; movw %ax, %ds;
movw %ax, %es; movw %ax, %ss");
+
+// asm volatile("inb $97, %al; outb %al, $0x80;
movb $3, %al; outb %al, $97; outb %al, $0x80;
movb $-74, %al; outb %al, $67; outb %al, $0x80;
movb $-119, %al; outb %al, $66; outb %al,
$0x80; movb $15, %al; outb %al, $66");
+
+ /* Need to call BIOS */
+ probe_cards(0);
+// set_mode(wakeup_header.video_mode);
+ set_mode(6);
+
+ /* Set up GDT and IDT here, possibly CR4 and EFER */
+}
Surely this needs some cleaning up? ;)
diff --git a/arch/x86/kernel/acpi/rm/wakeup.S b/arch/x86/kernel/acpi/rm/wakeup.S
new file mode 100644
index 0000000..bfa348c
--- /dev/null
+++ b/arch/x86/kernel/acpi/rm/wakeup.S
@@ -0,0 +1,129 @@
+/*
+ * ACPI wakeup real mode startup stub
+ */
+#include <asm/segment.h>
+#include <asm/msr-index.h>
+
+
+#define BEEP \
+ inb $97, %al; \
+ outb %al, $0x80; \
+ movb $3, %al; \
+ outb %al, $97; \
+ outb %al, $0x80; \
+ movb $-74, %al; \
+ outb %al, $67; \
+ outb %al, $0x80; \
+ movb $-119, %al; \
+ outb %al, $66; \
+ outb %al, $0x80; \
+ movb $15, %al; \
+ outb %al, $66;
+
BEEP isn't actually used here and should probably be a C function if
needed. Note: in real mode you can also produce a beep by calling
int $0x10 with %ax = 0x0e07. Please note that some int $0x10
implementations clobber certain registers... see the INT10 macro in the
bootup code.
Seriously cool, though, that you're getting this far.
-hpa
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