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更新文件 PCIe_中的_Capability_结构的寻址.md

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lion187 2018-12-06 12:38:25 +08:00
parent 4b6ab19b81
commit d3294ea32c
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Hardware/Bus/PCI/PCIe_中的_Capability_结构的寻址.md
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@ -10,16 +10,16 @@ PCI-X 和PCIe 总线规范要求其设备必须支持 Capabilities 结构。在P
1. We look at address 34h and see the address of the next capability register set (50h). 1. We look at address 34h and see the address of the next capability register set (50h).
![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/03.jpg) ![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/03.jpg)
2. We jump to 50h and see a capability ID of 05h (MSI Capability Structure). We look at the next capability pointer in 51h to find which address to jump to next (78h). 2. We jump to 50h and see a capability ID of 05h (MSI Capability Structure). We look at the next capability pointer in 51h to find which address to jump to next (78h).
![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/04.jpg) ![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/04.jpg)
3. We jump to 78h and see a capability ID of 01h (Power Management Capability Structure). We look at the next capability pointer in 79h to find which address to jump to the next (80h). 3. We jump to 78h and see a capability ID of 01h (Power Management Capability Structure). We look at the next capability pointer in 79h to find which address to jump to the next (80h).
![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/05.jpg) ![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/05.jpg)
4. We jump to 80h and see a capability ID of 10h (PCI Express Capability Structure). We see 00h as the next capability pointer in 81h signifying the end of the linked list. 4. We jump to 80h and see a capability ID of 10h (PCI Express Capability Structure). We see 00h as the next capability pointer in 81h signifying the end of the linked list.
![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/06.jpg) ![查找 Capability 寄存器](imgs/PCIe_中的_Capability_结构的寻址/06.jpg)