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authorJacob Pan <jacob.jun.pan@intel.com>2009-09-02 16:37:17 +0200
committerH. Peter Anvin <hpa@zytor.com>2010-02-24 20:01:21 +0100
commitbb24c4716185f6e116c440462c65c1f56649183b (patch)
tree70af8cb5932207d0b16330f47829bbf084f7b04e /Documentation
parentx86, mrst: Add vrtc platform data setup code (diff)
downloadlinux-bb24c4716185f6e116c440462c65c1f56649183b.tar.xz
linux-bb24c4716185f6e116c440462c65c1f56649183b.zip
x86, apbt: Moorestown APB system timer driver
Moorestown platform does not have PIT or HPET platform timers. Instead it has a bank of eight APB timers. The number of available timers to the os is exposed via SFI mtmr tables. All APB timer interrupts are routed via ioapic rtes and delivered as MSI. Currently, we use timer 0 and 1 for per cpu clockevent devices, timer 2 for clocksource. Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com> LKML-Reference: <43F901BD926A4E43B106BF17856F0755A318D2D2@orsmsx508.amr.corp.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 51bceb0fb277..917220459e2a 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2793,6 +2793,12 @@ and is between 256 and 4096 characters. It is defined in the file
default x2apic cluster mode on platforms
supporting x2apic.
+ x86_mrst_timer= [X86-32,APBT]
+ Choose timer option for x86 Moorestown MID platform.
+ Two valid options are apbt timer only and lapic timer
+ plus one apbt timer for broadcast timer.
+ x86_mrst_timer=apbt_only | lapic_and_apbt
+
xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks.
xd_geo= See header of drivers/block/xd.c.