1 use crate::arch::TraitPciArch; 2 use crate::driver::acpi::acpi::mcfg_find_segment; 3 use crate::driver::pci::pci::{ 4 BusDeviceFunction, PciAddr, PciError, PciRoot, SegmentGroupNumber, PORT_PCI_CONFIG_ADDRESS, 5 PORT_PCI_CONFIG_DATA, 6 }; 7 use crate::include::bindings::bindings::{ 8 acpi_get_MCFG, acpi_iter_SDT, acpi_system_description_table_header_t, io_in32, io_out32, 9 }; 10 11 use core::ffi::c_void; 12 use core::ptr::NonNull; 13 pub struct X86_64PciArch {} 14 impl TraitPciArch for X86_64PciArch { 15 fn read_config(bus_device_function: &BusDeviceFunction, offset: u8) -> u32 { 16 // 构造pci配置空间地址 17 let address = ((bus_device_function.bus as u32) << 16) 18 | ((bus_device_function.device as u32) << 11) 19 | ((bus_device_function.function as u32 & 7) << 8) 20 | (offset & 0xfc) as u32 21 | (0x80000000); 22 let ret = unsafe { 23 io_out32(PORT_PCI_CONFIG_ADDRESS, address); 24 let temp = io_in32(PORT_PCI_CONFIG_DATA); 25 temp 26 }; 27 return ret; 28 } 29 30 fn write_config(bus_device_function: &BusDeviceFunction, offset: u8, data: u32) { 31 let address = ((bus_device_function.bus as u32) << 16) 32 | ((bus_device_function.device as u32) << 11) 33 | ((bus_device_function.function as u32 & 7) << 8) 34 | (offset & 0xfc) as u32 35 | (0x80000000); 36 unsafe { 37 io_out32(PORT_PCI_CONFIG_ADDRESS, address); 38 // 写入数据 39 io_out32(PORT_PCI_CONFIG_DATA, data); 40 } 41 } 42 43 fn address_pci_to_physical(pci_address: PciAddr) -> usize { 44 return pci_address.data(); 45 } 46 47 fn ecam_root(segement: SegmentGroupNumber) -> Result<PciRoot, PciError> { 48 let mut data: usize = 0; 49 let data_point = &mut data; 50 unsafe { 51 acpi_iter_SDT(Some(acpi_get_MCFG), data_point as *mut usize as *mut c_void); 52 }; 53 //kdebug!("{}",data); 54 //loop{} 55 let head = NonNull::new(data as *mut acpi_system_description_table_header_t).unwrap(); 56 let outcome = unsafe { mcfg_find_segment(head).as_ref() }; 57 for segmentgroupconfiguration in outcome { 58 if segmentgroupconfiguration.segement_group_number == segement { 59 return Ok(PciRoot { 60 physical_address_base: segmentgroupconfiguration.base_address, 61 mmio_base: None, 62 segement_group_number: segement, 63 bus_begin: segmentgroupconfiguration.bus_begin, 64 bus_end: segmentgroupconfiguration.bus_end, 65 }); 66 } 67 } 68 return Err(PciError::SegmentNotFound); 69 } 70 } 71