dma_cookie_t cookie, dma_cookie_t*last, dma_cookie_t *used) {structdma_tx_state state;enumdma_status status; status= chan->device->device_tx_status(chan, cookie, &state);if(last)*last =state.last;if(used)*used =state.used;returnstatus; } 然后在callback()中发送SIGIO信号: staticvoid...
If the device supports DMA, the driver sets up a buffer usingkmalloc()or a similar interface, which returns a virtual address (X). The virtual memory system maps X to a physical address (Y) in system RAM. The driver can use virtual address X to access the buffer, but the device itsel...
Disable D-Cache for part of the memory. This can be done by configuring the memory protection unit (MPU). The downside is that the MPU regions have certain alignment restrictions and you need to place the DMA buffers to specific parts of memory. Each toolchain (GCC, IAR, KEIL) needs to ...
UnmapReservedLogicalRangeA pointer to the IOMMU_UNMAP_RESERVED_LOGICAL_RANGE function that unmaps a previously mapped reserved logical range.CreateDeviceA pointer to the IOMMU_DEVICE_CREATE function that takes a physical device object and creates an IOMMU_DMA_DEVICE.DeleteDevice...
12、aded Materials without Maps没有贴图的明暗处理材质Shaded Materials with Maps有贴图的明暗处理材质Realistic Materials without Maps没有贴图的真实材质Realistic Materials with Maps有贴图的真实材质Viewport Lighting and Shadows视口照明和阴影Auto Display Selected Lights自动显示选定的灯光Lock Selected Lights锁定选定...
+ * Unmaps segments, except for ones marked as pci_p2pdma which do not + * require any further action as they contain a bus address. + */ void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) ...
9 10 11 12 VMMDLL_PROCESS_INFORMATION ProcessInformation = { 0 };ProcessInformation.magic = VMM...
context_tracking_state.h cookie.h cordic.h coredump.h coresight-pmu.h coresight-stm.h coresight.h count_zeros.h counter.h cper.h cpu.h cpu_cooling.h cpu_pm.h cpu_rmap.h cpu_smt.h cpufeature.h cpufreq.h cpuhotplug.h cpuhplock.h cpuidle.h cpuidle_haltpoll.h...
void DMA_IRQHandler(void) { Chip_GPIO_SetPinState(LPC_GPIO,TEST_PORT,true); /* Rrror interrupt on channel 0? */ if ((Chip_DMA_GetIntStatus(LPC_DMA) & DMA_INTSTAT_ACTIVEERRINT) != 0) { /* This shouldn't happen for this simple DMA example, so set the LED to indicat...
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