[src/trunk]: src/sys/arch/x86/acpi When getting the frequency, use APERF/MPER...

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/53cd0c7ef611
branches:  trunk
changeset: 765790:53cd0c7ef611
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Mon Jun 06 07:42:32 2011 +0000

description:
When getting the frequency, use APERF/MPERF as a fallback method.

diffstat:

 sys/arch/x86/acpi/acpi_cpu_md.c |  16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diffs (37 lines):

diff -r 55579c44a7db -r 53cd0c7ef611 sys/arch/x86/acpi/acpi_cpu_md.c
--- a/sys/arch/x86/acpi/acpi_cpu_md.c   Mon Jun 06 06:59:16 2011 +0000
+++ b/sys/arch/x86/acpi/acpi_cpu_md.c   Mon Jun 06 07:42:32 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_cpu_md.c,v 1.59 2011/05/31 14:45:36 jruoho Exp $ */
+/* $NetBSD: acpi_cpu_md.c,v 1.60 2011/06/06 07:42:32 jruoho Exp $ */
 
 /*-
  * Copyright (c) 2010, 2011 Jukka Ruohonen <jruohonen%iki.fi@localhost>
@@ -27,7 +27,7 @@
  * SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.59 2011/05/31 14:45:36 jruoho Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.60 2011/06/06 07:42:32 jruoho Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -755,6 +755,18 @@
                }
        }
 
+       /*
+        * If the value was not found, try APERF/MPERF.
+        * The state is P0 if the return value is 100 %.
+        */
+       if ((sc->sc_flags & ACPICPU_FLAG_P_HWF) != 0) {
+
+               if (acpicpu_md_pstate_hwf(sc->sc_ci) == 100) {
+                       *freq = sc->sc_pstate[0].ps_freq;
+                       return 0;
+               }
+       }
+
        return EIO;
 }