fsb.c File Reference

#include <arch/cpu.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/tsc.h>
#include <cpu/intel/speedstep.h>
#include <cpu/intel/fsb.h>
#include <console/console.h>
#include <commonlib/helpers.h>
#include <delay.h>

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Macros
#define	MSR_PLATFORM_INFO   0xce

Functions
static int	get_fsb_tsc (int *fsb, int *ratio)
static void	resolve_timebase (void)
u32	get_timer_fsb (void)
unsigned long	tsc_freq_mhz (void)
int	get_ia32_fsb_x3 (void)
	Returns three times the FSB clock in MHz. More...

Variables
static u32	timer_fsb
static u32	timer_tsc

Macro Definition Documentation

MSR_PLATFORM_INFO

#define MSR_PLATFORM_INFO   0xce

Definition at line 16 of file fsb.c.

Function Documentation

get_fsb_tsc()

static int get_fsb_tsc ( int *  fsb, int *  ratio  )

static

Definition at line 18 of file fsb.c.

References c, cpuid_eax(), get_fms(), msr_struct::hi, IA32_PERF_STATUS, msr_struct::lo, MSR_EBC_FREQUENCY_ID, MSR_FSB_FREQ, MSR_PLATFORM_INFO, and rdmsr().

Referenced by resolve_timebase().

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get_ia32_fsb_x3()

int get_ia32_fsb_x3

(

void

)

Returns three times the FSB clock in MHz.

The result of calculations with the returned value shall be divided by 3. This helps to avoid rounding errors.

Definition at line 133 of file fsb.c.

References BIOS_ERR, DIV_ROUND_CLOSEST, get_timer_fsb(), and printk.

Referenced by gen_pstate_entries().

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get_timer_fsb()

u32 get_timer_fsb

(

void

)

Definition at line 109 of file fsb.c.

References resolve_timebase(), and timer_fsb.

Referenced by get_ia32_fsb_x3(), and udelay().

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resolve_timebase()

static void resolve_timebase ( void  )

static

Definition at line 87 of file fsb.c.

References BIOS_ERR, DIV_ROUND_CLOSEST, get_fsb_tsc(), printk, timer_fsb, and timer_tsc.

Referenced by get_timer_fsb(), and tsc_freq_mhz().

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tsc_freq_mhz()

unsigned long tsc_freq_mhz

(

void

)

Definition at line 118 of file fsb.c.

References resolve_timebase(), and timer_tsc.

Referenced by baytrail_run_reference_code(), bootblock_c_entry(), init_timer(), lb_arch_add_records(), timestamp_get(), timestamp_tick_freq_mhz(), and udelay().

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Variable Documentation

timer_fsb

u32 timer_fsb

static

Definition at line 12 of file fsb.c.

Referenced by get_timer_fsb(), resolve_timebase(), and udelay().

timer_tsc

u32 timer_tsc

static

Definition at line 13 of file fsb.c.

Referenced by resolve_timebase(), and tsc_freq_mhz().