//
//The following routine scans all devices on one system bus,and inserts them into
//system bus's device list.
//
static VOID PciScanDevices(__SYSTEM_BUS* lpSysBus)
{
DWORD dwConfigReg = 0x80000000;
DWORD dwLoop = 0;
DWORD dwTmp = 0;
if(NULL == lpSysBus) //Parameter check.
return;
dwTmp = lpSysBus->dwBusNum;
dwTmp &= 0x000000FF; //Only reserve the lowest 7 bits.
dwConfigReg += (dwTmp << 16); //Now,dwConfigReg value countains the bus number.
//
//The following code scans all devices and functions in one PCI bus,if there is
//a device or function,it calles PciAddDevice routine to initialize it and add it
//to system bus's device list.
//
for(dwLoop = 0;dwLoop < 0x100;dwLoop ++) //For every devices and functions.
{
dwConfigReg &= 0xFFFF0000;
dwConfigReg += (dwLoop << 8); //Now,dwConfigReg countains the bus number,device number,
//and function number.
__outd(CONFIG_REGISTER,dwConfigReg);
dwTmp = __ind(DATA_REGISTER);
if(0xFFFFFFFF == dwTmp) //The device or function does not exist.
continue;
/*
//
//Now,find one PCI device,first,we check if it is a multi-function device,
//if so,enumerate all sub-functions of this physical device,and add them to
//system bus,otherwise,add the current physical device to system bus,and
//increment 7 to dwLoop to skip all functions bound to this physical device.
//
dwConfigReg += PCI_CONFIG_OFFSET_CACHELINESZ;
__outd(CONFIG_REGISTER,dwConfigReg);
dwTmp = __ind(DATA_REGISTER); //Read one double word countaining the header
//type segment.
dwConfigReg -= PCI_CONFIG_OFFSET_CACHELINESZ;
if(dwTmp & 0x00800000) //This is a multiple function device.
{
PciAddDevice(dwConfigReg,lpSysBus);
}
else //This is a single function device.
{
PciAddDevice(dwConfigReg,lpSysBus);
dwLoop += 7; //Skip all other functions of current device.
}*/
PciAddDevice(dwConfigReg,lpSysBus); //Add to system device.
}
return;
}
/*
* Scans all devices on one system bus,and inserts them into
* system bus's device list.
*/
static VOID PciScanDevices(__SYSTEM_BUS* lpSysBus)
{
DWORD dwConfigReg = 0x80000000;
DWORD dwLoop = 0, dwTmp = 0;
if (NULL == lpSysBus)
{
return;
}
dwTmp = lpSysBus->dwBusNum;
dwTmp &= 0x000000FF; //Only reserve the lowest 7 bits.
dwConfigReg += (dwTmp << 16); //Now,dwConfigReg value countains the bus number.
/*
* The following code scans all devices and functions in one PCI bus,if there is
* a device or function,it calles PciAddDevice routine to initialize it and add it
* to system bus's device list.
*/
for(dwLoop = 0;dwLoop < 0x100;dwLoop ++)
{
dwConfigReg &= 0xFFFF0000;
/* Now,dwConfigReg countains the bus number,device number, and function number. */
dwConfigReg += (dwLoop << 8);
__outd(CONFIG_REGISTER,dwConfigReg);
dwTmp = __ind(DATA_REGISTER);
/* The device or function does not exist. */
if (0xFFFFFFFF == dwTmp)
{
continue;
}
/* Add the probed device into system. */
PciAddDevice(dwConfigReg,lpSysBus);
}
return;
}
