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

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This commit is contained in:
jruoho 2011-06-06 07:42:32 +00:00
parent a3db9f0052
commit 33432cfc01
1 changed files with 14 additions and 2 deletions
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16
sys/arch/x86/acpi/acpi_cpu_md.c
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@ -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>
@ -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 @@ acpicpu_md_pstate_get(struct acpicpu_softc *sc, uint32_t *freq)
}
}
/*
* 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;
}