Initial suspend/resume support for amd64.

This code is heavily inspired by Takanori Watanabe's experimental SMP patch
for i386 and large portion was shamelessly cut and pasted from Peter Wemm's
AP boot code.

1 files changed, 26 insertions, 1 deletions

diff --git a/sys/amd64/acpica/acpi_machdep.c b/sys/amd64/acpica/acpi_machdep.c
index e9e9235..8b4840e 100644
--- a/sys/amd64/acpica/acpi_machdep.c
+++ b/sys/amd64/acpica/acpi_machdep.c
@@ -31,25 +31,50 @@ __FBSDID("$FreeBSD$");
 #include <sys/bus.h>
 #include <sys/kernel.h>
 #include <sys/module.h>
+#include <sys/sysctl.h>
 
 #include <contrib/dev/acpica/acpi.h>
 #include <dev/acpica/acpivar.h>
 
 #include <machine/nexusvar.h>
 
+SYSCTL_DECL(_debug_acpi);
+
+uint32_t acpi_resume_beep;
+TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
+SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
+    0, "Beep the PC speaker when resuming");
+uint32_t acpi_reset_video;
+TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
+
 static int intr_model = ACPI_INTR_PIC;
+static struct apm_clone_data acpi_clone;
 
 int
 acpi_machdep_init(device_t dev)
 {
-	struct	acpi_softc *sc;
+	struct acpi_softc	*sc;
 
 	sc = devclass_get_softc(devclass_find("acpi"), 0);
+
+	/* Create a fake clone for /dev/acpi. */
+	STAILQ_INIT(&sc->apm_cdevs);
+	acpi_clone.cdev = sc->acpi_dev_t;
+	acpi_clone.acpi_sc = sc;
+	ACPI_LOCK(acpi);
+	STAILQ_INSERT_TAIL(&sc->apm_cdevs, &acpi_clone, entries);
+	ACPI_UNLOCK(acpi);
+	sc->acpi_clone = &acpi_clone;
 	acpi_install_wakeup_handler(sc);
 
 	if (intr_model != ACPI_INTR_PIC)
 		acpi_SetIntrModel(intr_model);
 
+	SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
+	    SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
+	    "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
+	    "Call the VESA reset BIOS vector on the resume path");
+
 	return (0);
 }