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x86, mrst: Platform clock setup code 

Add Moorestown platform clock setup code to the x86_init abstraction.

Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
LKML-Reference: <43F901BD926A4E43B106BF17856F0755A318D2D4@orsmsx508.amr.corp.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Jacob Pan 2010-02-12 05:01:12 -08:00 committed by H. Peter Anvin
parent bb24c47161
commit 3746c6b6e2
1 changed files with 53 additions and 0 deletions
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53
arch/x86/kernel/mrst.c
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@ -23,6 +23,7 @@
#include <asm/mrst.h>
#include <asm/io.h>
#include <asm/i8259.h>
#include <asm/apb_timer.h>
static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM];
static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];
@ -166,11 +167,55 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table)
return 0;
}
/*
* the secondary clock in Moorestown can be APBT or LAPIC clock, default to
* APBT but cmdline option can also override it.
*/
static void __cpuinit mrst_setup_secondary_clock(void)
{
/* restore default lapic clock if disabled by cmdline */
if (disable_apbt_percpu)
return setup_secondary_APIC_clock();
apbt_setup_secondary_clock();
}
static unsigned long __init mrst_calibrate_tsc(void)
{
unsigned long flags, fast_calibrate;
local_irq_save(flags);
fast_calibrate = apbt_quick_calibrate();
local_irq_restore(flags);
if (fast_calibrate)
return fast_calibrate;
return 0;
}
void __init mrst_time_init(void)
{
sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
pre_init_apic_IRQ0();
apbt_time_init();
}
void __init mrst_rtc_init(void)
{
sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
}
/*
* if we use per cpu apb timer, the bootclock already setup. if we use lapic
* timer and one apbt timer for broadcast, we need to set up lapic boot clock.
*/
static void __init mrst_setup_boot_clock(void)
{
pr_info("%s: per cpu apbt flag %d \n", __func__, disable_apbt_percpu);
if (disable_apbt_percpu)
setup_boot_APIC_clock();
};
/*
* Moorestown specific x86_init function overrides and early setup
* calls.
@ -180,6 +225,14 @@ void __init x86_mrst_early_setup(void)
x86_init.resources.probe_roms = x86_init_noop;
x86_init.resources.reserve_resources = x86_init_noop;
x86_init.timers.timer_init = mrst_time_init;
x86_init.timers.setup_percpu_clockev = mrst_setup_boot_clock;
x86_init.irqs.pre_vector_init = x86_init_noop;
x86_cpuinit.setup_percpu_clockev = mrst_setup_secondary_clock;
x86_platform.calibrate_tsc = mrst_calibrate_tsc;
x86_init.pci.init = pci_mrst_init;
x86_init.pci.fixup_irqs = x86_init_noop;