Sample Code Name
https://sourceforge.net/u/efipy/svn/HEAD/tree/Trunk/PciScan.py
Description
PCI Scan program is the sample for combination between EfiPy and CorePy.
PCI scan with EfiPy, it uses below functions, constants and structure in EfiPy.MdePkg.IndustryStandard.Pci
Structure PCI_TYPE_GENERIC
Structure PCI_CONFIG_ACCESS_CF8
PCI_MAX_BUS
PCI_MAX_DEVICE
PCI_MAX_FUNC
IS_PCI_MULTI_FUNC
PCI scan with CorePy, it uses I/O port 0x0cf8, 0x0cfc for PCI generic register scanning by assembly language.
It also needs input parameter for assigning PCI bus, Device, function and registers.
EfiPy full package is from https://sourceforge.net/projects/efipy/
Pseudo Sample Code
class PciScan:
#
# Prebuild assembly code
#
def __init__ (self):
self.code.add(x86.mov(reg.rax, mem.MemRef(reg.rbp, 16)))
self.code.add(x86.mov(reg.dx, 0x0cf8))
self.code.add(x86.out(reg.dx, reg.eax))
self.code.add(x86.mov(reg.dx, 0x0cfc))
self.code.add(x86.in_(reg.eax, reg.dx))
#
# Get PCI register entry, return UINT32 value
#
def scan (self, Bus = 0, Dev = 0, Func = 0, Reg = 0):
reg = pci.PCI_CONFIG_ACCESS_CF8((Reg & 0xFC, Func, Dev, Bus, 0, 1))
self.params.p1 = reg.Uint32
ret = self.proc.execute(self.code,
params = self.params,
mode = 'int')
return ret
if __name__ == '__main__':
PciDev = PciScan()
ret = PciDev.scan(Bus, Dev, Func, Reg)
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