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x86, mrst: add more timer config options

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Always-on local APIC timer (ARAT) has been introduced to Medfield, along
with the platform APB timers we have more timer configuration options
between Moorestown and Medfield.

This patch adds run-time detection of avaiable timer features so that
we can treat Medfield as a variant of Moorestown and set up the optimal
timer options for each platform. i.e.

Medfield: per cpu always-on local APIC timer
Moorestown: per cpu APB timer

Manual override is possible via cmdline option x86_mrst_timer.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
LKML-Reference: <1274295685-6774-4-git-send-email-jacob.jun.pan@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Jacob Pan
2010-05-19 12:01:25 -07:00
committed by H. Peter Anvin
parent a0c173bd8a
commit a875c01944
4 changed files with 72 additions and 55 deletions
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1
arch/x86/include/asm/mrst.h
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@ -12,6 +12,7 @@
#define _ASM_X86_MRST_H
extern int pci_mrst_init(void);
extern int mrst_identify_cpu(void);
extern int mrst_timer_options __cpuinitdata;
int __init sfi_parse_mrtc(struct sfi_table_header *table);
/*