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Date:      Wed, 11 Apr 2012 19:37:36 +0000 (UTC)
From:      John Baldwin <jhb@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org
Subject:   svn commit: r234142 - in stable/8/sys/i386: acpica conf
Message-ID:  <201204111937.q3BJbaau092303@svn.freebsd.org>
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Author: jhb
Date: Wed Apr 11 19:37:36 2012
New Revision: 234142
URL: http://svn.freebsd.org/changeset/base/234142

Log:
  MFC 232742:
  MFamd64:
  - Return failure for a suspend attempt if we have no wake address.
  - Use intr_disable()/intr_restore() instead of ACPI_DISABLE_IRQS().
  - Invoke intr_suspend() earlier and call intr_resume() if suspend
    fails.
  - Use pause in the loop waiting for CPU to suspend.
  - Restore PAT MSR, switchtime, switchticks, and MTRRs on resume.

Modified:
  stable/8/sys/i386/acpica/acpi_wakeup.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/boot/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/e1000/   (props changed)
  stable/8/sys/i386/conf/XENHVM   (props changed)

Modified: stable/8/sys/i386/acpica/acpi_wakeup.c
==============================================================================
--- stable/8/sys/i386/acpica/acpi_wakeup.c	Wed Apr 11 19:37:08 2012	(r234141)
+++ stable/8/sys/i386/acpica/acpi_wakeup.c	Wed Apr 11 19:37:36 2012	(r234142)
@@ -33,6 +33,8 @@ __FBSDID("$FreeBSD$");
 #include <sys/kernel.h>
 #include <sys/bus.h>
 #include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/memrange.h>
 #include <sys/proc.h>
 #include <sys/sysctl.h>
 
@@ -199,13 +201,14 @@ acpi_sleep_machdep(struct acpi_softc *sc
 	uint32_t		cr3;
 	u_long			ef;
 
-	ret = 0;
+	ret = -1;
 	if (sc->acpi_wakeaddr == 0)
-		return (0);
+		return (ret);
 
 	AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
 
-	ef = read_eflags();
+	ef = intr_disable();
+	intr_suspend();
 
 	/*
 	 * Temporarily switch to the kernel pmap because it provides an
@@ -221,10 +224,8 @@ acpi_sleep_machdep(struct acpi_softc *sc
 #endif
 
 	ret_addr = 0;
-	ACPI_DISABLE_IRQS();
 	if (acpi_savecpu()) {
 		/* Execute Sleep */
-		intr_suspend();
 
 		p_gdt = (struct region_descriptor *)
 				(sc->acpi_wakeaddr + physical_gdt);
@@ -266,25 +267,31 @@ acpi_sleep_machdep(struct acpi_softc *sc
 			device_printf(sc->acpi_dev,
 				"AcpiEnterSleepState failed - %s\n",
 				AcpiFormatException(status));
-			ret = -1;
 			goto out;
 		}
 
-		for (;;) ;
+		for (;;)
+			ia32_pause();
 	} else {
-		/* Execute Wakeup */
-		mca_resume();
-		intr_resume();
-
+		pmap_init_pat();
+		PCPU_SET(switchtime, 0);
+		PCPU_SET(switchticks, ticks);
 		if (bootverbose) {
 			acpi_savecpu();
 			acpi_printcpu();
 		}
+		ret = 0;
 	}
 
 out:
 	load_cr3(cr3);
-	write_eflags(ef);
+	mca_resume();
+	intr_resume();
+	intr_restore(ef);
+
+	if (ret == 0 && mem_range_softc.mr_op != NULL &&
+	    mem_range_softc.mr_op->reinit != NULL)
+		mem_range_softc.mr_op->reinit(&mem_range_softc);
 
 	/* If we beeped, turn it off after a delay. */
 	if (acpi_resume_beep)

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