Module Name: src
Committed By: jruoho
Date: Fri Jul 23 13:54:21 UTC 2010
Modified Files:
src/sys/arch/x86/acpi: acpi_cpu_md.c
src/sys/dev/acpi: acpi_cpu_cstate.c
Log Message:
Make sure we use MWAIT with MONITOR.
Also clarify when we have interrupts disabled.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/x86/acpi/acpi_cpu_md.c
cvs rdiff -u -r1.7 -r1.8 src/sys/dev/acpi/acpi_cpu_cstate.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/x86/acpi/acpi_cpu_md.c
diff -u src/sys/arch/x86/acpi/acpi_cpu_md.c:1.2 src/sys/arch/x86/acpi/acpi_cpu_md.c:1.3
--- src/sys/arch/x86/acpi/acpi_cpu_md.c:1.2 Sun Jul 18 09:39:45 2010
+++ src/sys/arch/x86/acpi/acpi_cpu_md.c Fri Jul 23 13:54:21 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_cpu_md.c,v 1.2 2010/07/18 09:39:45 jruoho Exp $ */
+/* $NetBSD: acpi_cpu_md.c,v 1.3 2010/07/23 13:54:21 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <[email protected]>
@@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.2 2010/07/18 09:39:45 jruoho Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.3 2010/07/23 13:54:21 jruoho Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -164,24 +164,35 @@
return 0;
}
+/*
+ * The MD idle loop. Called with interrupts disabled.
+ */
void
acpicpu_md_idle_enter(int method, int state)
{
-
- KASSERT(native_idle != NULL);
+ struct cpu_info *ci = curcpu();
switch (method) {
case ACPICPU_C_STATE_FFH:
+
+ x86_enable_intr();
+ x86_monitor(&ci->ci_want_resched, 0, 0);
+
+ if (__predict_false(ci->ci_want_resched) != 0)
+ return;
+
x86_mwait((state - 1) << 4, 0);
break;
case ACPICPU_C_STATE_HALT:
- x86_stihlt();
- break;
- default:
- (*native_idle)();
+ if (__predict_false(ci->ci_want_resched) != 0) {
+ x86_enable_intr();
+ return;
+ }
+
+ x86_stihlt();
break;
}
}
Index: src/sys/dev/acpi/acpi_cpu_cstate.c
diff -u src/sys/dev/acpi/acpi_cpu_cstate.c:1.7 src/sys/dev/acpi/acpi_cpu_cstate.c:1.8
--- src/sys/dev/acpi/acpi_cpu_cstate.c:1.7 Fri Jul 23 08:11:49 2010
+++ src/sys/dev/acpi/acpi_cpu_cstate.c Fri Jul 23 13:54:21 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_cpu_cstate.c,v 1.7 2010/07/23 08:11:49 jruoho Exp $ */
+/* $NetBSD: acpi_cpu_cstate.c,v 1.8 2010/07/23 13:54:21 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <[email protected]>
@@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_cstate.c,v 1.7 2010/07/23 08:11:49 jruoho Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_cstate.c,v 1.8 2010/07/23 13:54:21 jruoho Exp $");
#include <sys/param.h>
#include <sys/cpu.h>
@@ -720,30 +720,28 @@
struct acpicpu_softc *sc;
int state;
- if (__predict_false(ci->ci_want_resched) != 0)
- return;
+ acpi_md_OsDisableInterrupt();
KASSERT(acpicpu_sc != NULL);
KASSERT(ci->ci_cpuid < maxcpus);
KASSERT(ci->ci_ilevel == IPL_NONE);
- if (__predict_false(acpi_suspended != 0)) {
- acpicpu_md_idle_enter(0, 0);
- return;
- }
-
sc = acpicpu_sc[ci->ci_cpuid];
/*
- * If all CPUs do not have an ACPI counterpart,
- * the softc may be NULL. In this case use C1.
+ * If all CPUs do not have their ACPI counterparts, the softc
+ * may be NULL. In this case fall back to normal C1 with HALT.
*/
if (__predict_false(sc == NULL)) {
- acpicpu_md_idle_enter(0, 0);
+ acpicpu_md_idle_enter(ACPICPU_C_STATE_HALT, ACPI_STATE_C1);
+ return;
+ }
+
+ if (__predict_false(acpi_suspended != 0)) {
+ acpicpu_md_idle_enter(ACPICPU_C_STATE_HALT, ACPI_STATE_C1);
return;
}
- acpi_md_OsDisableInterrupt();
state = acpicpu_cstate_latency(sc);
/*
@@ -822,7 +820,7 @@
break;
default:
- acpicpu_md_idle_enter(0, 0);
+ acpicpu_md_idle_enter(ACPICPU_C_STATE_HALT, ACPI_STATE_C1);
break;
}
