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ChibiOS
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1541 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2010-01-23 11:45:27 +00:00
parent 7fc714884a
commit 461b44091f
1 changed files with 8 additions and 15 deletions
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23
os/ports/GCC/ARMCM3/chcore.c
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@ -70,24 +70,17 @@ void SysTickVector(void) {
/**
* @brief SVC vector.
* @details The SVC vector is used for commanded context switch.
* @details The SVC vector is used for commanded context switch. Structures
* @p intctx are saved and restored from the process stacks of the
* switched threads.
*
* @param otp the thread to be switched out
* @param ntp the thread to be switched it
*/
/** @cond never */
#if !defined(__DOXYGEN__)
__attribute__((naked))
/** @endcond */
#endif
void SVCallVector(Thread *otp, Thread *ntp) {
/* { r0 = otp, r1 = ntp } */
/* get the BASEPRI in r3 */
/* get the PSP in r12 */
/* push the registers on the PSP stack */
/* stores the modified PSP into the thread context */
/* fetches the PSP position from the new thread context */
/* pop the registers from the PSP stack */
/* set the PSP from r12 */
/* set the BASEPRI from R3 */
(void)otp;
(void)ntp;
#ifdef CH_CURRP_REGISTER_CACHE
@ -146,9 +139,9 @@ void SVCallVector(Thread *otp, Thread *ntp) {
/**
* @brief Preemption code.
*/
/** @cond never */
#ifndef __DOXYGEN__
__attribute__((naked))
/** @endcond */
#endif
void PendSVVector(void) {
Thread *otp;
register struct intctx *sp_thd asm("r12");
@ -161,7 +154,7 @@ void PendSVVector(void) {
(currp = fifo_remove(&rlist.r_queue))->p_state = THD_STATE_CURRENT;
chSchReadyI(otp);
#if CH_TIME_QUANTUM > 0
/* set the round-robin time quantum */
/* Set the round-robin time quantum.*/
rlist.r_preempt = CH_TIME_QUANTUM;
#endif
chDbgTrace(otp, currp);