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bsp/atsam: Optimize XDMAD_Handler()

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Load the channel interrupt mask only once.
This commit is contained in:
Sebastian Huber
2019-03-06 13:06:27 +01:00
parent 847638af35
commit b82a4b4f52
1 changed files with 14 additions and 8 deletions
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22
bsps/arm/atsam/contrib/libraries/libchip/source/xdmad.c
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@@ -307,10 +307,7 @@ static void XDMAD_Handler(void *arg)
{
sXdmad *pDmad;
Xdmac *pXdmac;
sXdmadChannel *pCh;
uint32_t xdmaChannelIntStatus, xdmaGlobaIntStatus, xdmaGlobalChStatus;
uint8_t bExec;
uint8_t _iChannel;
uint32_t xdmaGlobaIntStatus, xdmaGlobalChStatus;
pDmad = arg;
pXdmac = pDmad->pXdmacs;
@@ -318,17 +315,26 @@ static void XDMAD_Handler(void *arg)
xdmaGlobalChStatus = XDMAC_GetGlobalChStatus(pXdmac);
while (xdmaGlobaIntStatus != 0) {
_iChannel = 31 - __builtin_clz(xdmaGlobaIntStatus);
xdmaGlobaIntStatus &= ~(UINT32_C(1) << _iChannel);
uint8_t _iChannel;
sXdmadChannel *pCh;
uint8_t bExec;
_iChannel = 31 - __builtin_clz(xdmaGlobaIntStatus);
pCh = &pDmad->XdmaChannels[_iChannel];
bExec = 0;
xdmaGlobaIntStatus &= ~(UINT32_C(1) << _iChannel);
if ((xdmaGlobalChStatus & (XDMAC_GS_ST0 << _iChannel)) == 0) {
xdmaChannelIntStatus = XDMAC_GetMaskChannelIsr(pXdmac, _iChannel);
uint32_t xdmaChannelIntMask;
uint32_t xdmaChannelIntStatus;
xdmaChannelIntMask = XDMAC_GetChannelItMask(pXdmac, _iChannel);
xdmaChannelIntStatus = XDMAC_GetChannelIsr(pXdmac, _iChannel);
xdmaChannelIntStatus &= xdmaChannelIntMask;
if (xdmaChannelIntStatus & XDMAC_CIS_BIS) {
if ((XDMAC_GetChannelItMask(pXdmac, _iChannel) & XDMAC_CIM_LIM) == 0) {
if ((xdmaChannelIntMask & XDMAC_CIM_LIM) == 0) {
pCh->state = XDMAD_STATE_DONE;
bExec = 1;
}