爲什麼lscpi的輸出相對於不一致吧

下面是我的lspci -xxxx -vvvv -nn爲什麼lscpi的輸出相對於不一致吧

00:02.0 VGA compatible controller [0300]: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter [80ee:beef] (prog-if 00 [VGA controller]) 
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- 
    Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- 
    Latency: 0 
    Interrupt: pin A routed to IRQ 18 
    Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M] 
    Expansion ROM at <unassigned> [disabled] 
    Kernel driver in use: vboxvideo 
00: ee 80 ef be 07 00 00 00 00 00 00 03 00 00 00 00 
10: 08 00 00 e0 00 00 00 00 00 00 00 00 00 00 00 00 
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 01 00 00 
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

輸出具體來說，我想請教一下下面幾行：

Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M]

和

10: 08 00 00 e0 00 00 00 00 00 00 00 00 00 00 00 00

基於this (look at section 12.1.3)BAR0的值應該是e0000008而不是e0000000，即最後的字節應該是08而不是00，就像它在Region 0的描述中所說的那樣。這是爲什麼呢？我錯過了什麼？

來源

2016-07-20 flashburn

低4位實際上不是地址的一部分。該特定位（值爲0x08的位＃3）是將該區域標記爲可預取的位。請參閱https://en.wikipedia.org/wiki/PCI_configuration_space#Bus_enumeration或http://wiki.osdev.org/PCI#Base_Address_Registers或者只是在網頁上搜索「PCI配置空間標題」

來源

2016-07-21 13:12:09

爲什麼lscpi的輸出相對於不一致吧

回答

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