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Subject[PATCH 8/8] x86/mrst: platform clock setup code
From 7010894891c0838b150fee70235bd4bef9066fda Mon Sep 17 00:00:00 2001
From: Jacob Pan <jacob.jun.pan@intel.com>
Date: Fri, 12 Feb 2010 05:01:12 -0800
Subject: [PATCH 8/8] x86/mrst: platform clock setup code

add moorestwon platform clock setup code to the x86_init abstraction

Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
---
arch/x86/kernel/mrst.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
index b7fa049..0f1fa6f 100644
--- a/arch/x86/kernel/mrst.c
+++ b/arch/x86/kernel/mrst.c
@@ -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];
@@ -166,12 +167,56 @@ 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 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;

--
1.6.5.3


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