PCI设备中断重构，删去USB相关代码 (#285)

* 修复ecam无法获取MCFG table的问题

* 完善pcie

* 完善irq的错误检测机制

kernel/src/arch/x86_64/mod.rs

@@ -5,6 +5,7 @@ pub mod cpu;
 pub mod fpu;
 pub mod interrupt;
 pub mod mm;
+pub mod msi;
 pub mod pci;
 pub mod rand;
 pub mod sched;

kernel/src/arch/x86_64/msi.rs

@@ -0,0 +1,23 @@
+use crate::driver::pci::pci_irq::TriggerMode;
+/// @brief 获得MSI Message Address
+/// @param processor 目标CPU ID号
+/// @return MSI Message Address
+pub fn ia64_pci_get_arch_msi_message_address(processor: u16) -> u32 {
+    0xfee00000 as u32 | ((processor as u32) << 12)
+}
+/// @brief 获得MSI Message Data
+/// @param vector 分配的中断向量号
+/// @param processor 目标CPU ID号
+/// @param trigger  申请中断的触发模式，MSI默认为边沿触发
+/// @return MSI Message Address
+pub fn ia64_pci_get_arch_msi_message_data(
+    vector: u16,
+    processor: u16,
+    trigger: TriggerMode,
+) -> u32 {
+    match trigger {
+        TriggerMode::EdgeTrigger => vector as u32,
+        TriggerMode::AssertHigh => vector as u32 | 1 << 15 | 1 << 14,
+        TriggerMode::AssertLow => vector as u32 | 1 << 15,
+    }
+}

kernel/src/arch/x86_64/pci/pci.rs

@@ -50,6 +50,10 @@ impl TraitPciArch for X86_64PciArch {
         unsafe {
             acpi_iter_SDT(Some(acpi_get_MCFG), data_point as *mut usize as *mut c_void);
         };
+        // 防止无PCIE的机器找不到MCFG Table导致的错误
+        if data == 0 {
+            return Err(PciError::McfgTableNotFound);
+        }
         //kdebug!("{}",data);
         //loop{}
         let head = NonNull::new(data as *mut acpi_system_description_table_header_t).unwrap();