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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>
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@ -23,6 +23,7 @@
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#include <asm/mrst.h>
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#include <asm/io.h>
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#include <asm/i8259.h>
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#include <asm/apb_timer.h>
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static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM];
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static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];
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@ -166,11 +167,55 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table)
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return 0;
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}
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/*
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* the secondary clock in Moorestown can be APBT or LAPIC clock, default to
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* APBT but cmdline option can also override it.
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*/
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static void __cpuinit mrst_setup_secondary_clock(void)
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{
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/* restore default lapic clock if disabled by cmdline */
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if (disable_apbt_percpu)
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return setup_secondary_APIC_clock();
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apbt_setup_secondary_clock();
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}
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static unsigned long __init mrst_calibrate_tsc(void)
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{
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unsigned long flags, fast_calibrate;
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local_irq_save(flags);
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fast_calibrate = apbt_quick_calibrate();
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local_irq_restore(flags);
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if (fast_calibrate)
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return fast_calibrate;
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return 0;
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}
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void __init mrst_time_init(void)
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{
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sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
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pre_init_apic_IRQ0();
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apbt_time_init();
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}
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void __init mrst_rtc_init(void)
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{
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sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
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}
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/*
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* if we use per cpu apb timer, the bootclock already setup. if we use lapic
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* timer and one apbt timer for broadcast, we need to set up lapic boot clock.
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*/
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static void __init mrst_setup_boot_clock(void)
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{
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pr_info("%s: per cpu apbt flag %d \n", __func__, disable_apbt_percpu);
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if (disable_apbt_percpu)
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setup_boot_APIC_clock();
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};
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/*
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* Moorestown specific x86_init function overrides and early setup
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* calls.
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@ -180,6 +225,14 @@ void __init x86_mrst_early_setup(void)
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x86_init.resources.probe_roms = x86_init_noop;
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x86_init.resources.reserve_resources = x86_init_noop;
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x86_init.timers.timer_init = mrst_time_init;
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x86_init.timers.setup_percpu_clockev = mrst_setup_boot_clock;
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x86_init.irqs.pre_vector_init = x86_init_noop;
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x86_cpuinit.setup_percpu_clockev = mrst_setup_secondary_clock;
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x86_platform.calibrate_tsc = mrst_calibrate_tsc;
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x86_init.pci.init = pci_mrst_init;
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x86_init.pci.fixup_irqs = x86_init_noop;
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