public PCIE_Device(DWORD dwVendorId, DWORD dwDeviceId,
WD_PCI_SLOT slot)
{
m_wdcDevice = new WDC_DEVICE();
m_wdcDevice.id.pciId.dwVendorId = dwVendorId;
m_wdcDevice.id.pciId.dwDeviceId = dwDeviceId;
m_wdcDevice.slot.pciSlot = slot;
m_wdcDeviceMarshaler = new MarshalWdcDevice();
m_eventHandler = new EVENT_HANDLER_DOTNET(NEWAMD86_EventHandler);
m_regs = new PCIE_Regs();
SetDescription();
m_dmaMarshaler = new MarshalWdDma();
}
public void ReadDMA(uint uLocalAddr, uint dwBytes, ref IntPtr data)
{
//开DMA Buffer
IntPtr pDMA = IntPtr.Zero;
wdc_lib_decl.WDC_DMAContigBufLock(this.Handle, ref data, (uint)WD_DMA_OPTIONS.DMA_FROM_DEVICE, dwBytes, ref pDMA);
MarshalWdDma m_wdDmaMarshaler = new MarshalWdDma();
WD_DMA dma = (WD_DMA)m_wdDmaMarshaler.MarshalNativeToManaged(pDMA);
//配置buffer的物理地址到DSP的outbound
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 0, 0x30, 0x0); // 1MB outbound translation size
uint pageBase = (uint)(dma.Page[0].pPhysicalAddr & 0x100000);
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 0, 0x200, pageBase | 0x1);
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 0, 0x204, 0x0);
//将EDMA配置空间(0x02700000)映射到DSP的IB_OFFSET(3)，以便于PC控制DSP的EDMA
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 0, 0x33C, 0x02700000);
/* EDMA registers */
//#define EDMA_TPCC0_BASE_ADDRESS 0x02700000
//#define DMAQNUM0 0x0240
//#define ESR 0x1010
//#define EESR 0x1030
//#define IESR 0x1060
//#define IPR 0x1068
//#define ICR 0x1070
//#define PARAM_0_OPT 0x4000
//#define PARAM_0_SRC 0x4004
//#define PARAM_0_A_B_CNT 0x4008
//#define PARAM_0_DST 0x400C
//#define PARAM_0_SRC_DST_BIDX 0x4010
//#define PARAM_0_LINK_BCNTRLD 0x4014
//#define PARAM_0_SRC_DST_CIDX 0x4018
//#define PARAM_0_CCNT 0x401C
//#define PCIE_DATA 0x60000000
//#define DMA_TRANSFER_SIZE 0x400000 /* 4MB */
/* Payload size in bytes over PCIE link. PCIe module supports
* outbound payload size of 128 bytes and inbound payload size of 256 bytes */
//#define PCIE_TRANSFER_SIZE 0x80
///* For 1MB outbound translation window size */
//#define PCIE_ADLEN_1MB 0x00100000
//#define PCIE_1MB_BITMASK 0xFFF00000
//启动DMA传输
while (true)
{
/* Use TC0 for DBS = 128 bytes */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x0240, 0x0);
//* Set the interrupt enable for 1st Channel (IER). */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x1060, 0x1);
//* Clear any pending interrupt (IPR). */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x1070, 0x1);
//* Populate the Param entry. */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4000, 0x00100004); /* Enable SYNCDIM and TCINTEN, TCC = 0 */
//* Calculate the DSP PCI address for the PC address */
uint tmp = (uint)(0x60000000 + (dma.Page[0].pPhysicalAddr & ~0xFFF00000));
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x400C, tmp);//dst address目标地址
//PARAM_0_A_B_CNT
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4008, 0x10000 | dwBytes);
//PARAM_0_SRC
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4004, (DWORD)uLocalAddr);//src address 源地址
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4010, ((0x80 << 16) | 0x80));
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4014, 0xFFFF);
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x4018, 0x0);
//* C Count is set to 1 since mostly size will not be more than 1.75GB */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x401C, 0x1);
//* Set the Event Enable Set Register. */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x1030, 0x1);
//* Set the event set register. */
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 3, 0x1010, 0x1);
//等待dma结束
while (true)
{
wdc_lib_decl.WDC_ReadAddr32(this.Handle, 3, 0x1068, ref tmp);
if ((tmp & 0x1) == 1)
{
break;
}
}
break;
}
//恢复inbound配置
wdc_lib_decl.WDC_WriteAddr32(this.Handle, 0, 0x33C, 0x80000000);
}
