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cpu/cortex-m: Enable STKALIGN to make the Cortex-M keep the stack 8 byte aligned on 4 byte aligned stack pointers

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This commit is contained in:
DipSwitch 2016-04-07 00:27:26 +02:00
parent 5b386597c6
commit b6140f15f3
1 changed files with 8 additions and 0 deletions
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8
cpu/cortexm_common/cortexm_init.c
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@ -52,4 +52,12 @@ void cortexm_init(void)
/* enable wake up on events for __WFE CPU sleep */
SCB->SCR |= SCB_SCR_SEVONPEND_Msk;
/* for Cortex-M3 r1p0 and up the STKALIGN option was added, but not automatically
* enabled until revision r2p0. For 64bit function arguments to work properly this
* needs to be enabled.
*/
#ifdef SCB_CCR_STKALIGN_Msk
SCB->CCR |= SCB_CCR_STKALIGN_Msk;
#endif
}