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[PATCH]: libpayload: Document the architecture specific routines

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Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3552 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Jordan Crouse
2008-08-28 23:12:22 +00:00
parent 483926648e
commit b746178e65
2 changed files with 35 additions and 2 deletions
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26
payloads/libpayload/i386/timer.c
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@ -27,9 +27,17 @@
* SUCH DAMAGE.
*/
/** @file i386/timer.c
* @brief i386 specific timer routines
*/
#include <libpayload.h>
#include <arch/rdtsc.h>
/**
* @ingroup arch
* Global variable containing the speed of the processor in KHz
*/
u32 cpu_khz;
/**
@ -72,21 +80,39 @@ static inline void _delay(unsigned int delta)
while (rdtsc() < timeout) ;
}
/**
* Delay for a specified number of nanoseconds
* @param n Number of nanoseconds to delay for
*/
void ndelay(unsigned int n)
{
_delay(n * cpu_khz / 1000000);
}
/**
* Delay for a specified number of microseconds
* @param n Number of microseconds to delay for
*/
void udelay(unsigned int n)
{
_delay(n * cpu_khz / 1000);
}
/**
* Delay for a specified number of milliseconds
* @param n Number of milliseconds to delay for
*/
void mdelay(unsigned int m)
{
_delay(m * cpu_khz);
}
/**
* Delay for a specified number of seconds
* @param n Number of seconds to delay for
*/
void delay(unsigned int s)
{
_delay(s * cpu_khz * 1000);