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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
1 changed files with 4 additions and 4 deletions
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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).
![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).
![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).
![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.
![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)