5
PCIe Homework
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Question 1
Question at position 1
For the virt machine, the ECAM for PCIe device 0:0 is memory mapped to which address?
0x8000_0000
0x3000_0000
0x2000_0000
0x4000_0000
2. A PCIe device at bus 14 and slot 6 would use what IRQ number? (32, 33, 34, or 35)?
A PCIe device at bus 14 and slot 6 would use what IRQ number? (32, 33, 34, or 35)?
3.
A PCIe device at bus 3 and slot 7 would use what IRQ number? (32, 33, 34, or 35)?
4.To determine the address space required for a memory mapped address, which of the following would be written to the BAR register?
0
0x7f
-1
0xff
5.
Which of the following 16-bit vendor IDs means that "no device is attached"?
0x1111
0xFFFF
0xBEEF
0x0000
6. To determine if a PCIe device has a capabilities list, you should check which bit index of the status register?
0
1
2
3
4
5
6
7
7. A PCI express device will have which of the following capability IDs?
0xf1
0xfe
0xff
0x10
0x1f
0x09
0x01
0xef
8. A vendor specific capability will have which of the following capability IDs?
0xef
0x1f
0xf1
0x09
0x01
0xfe
0x10
0xff
9. A 64-bit base address register will have bits 2:1 set to which of the following?
00
01
10
11
10. Consider a BAR that I wrote -1 to. It returns 0xFFFF_F00C. How much address space (in bytes) would this device require?
8
16
64
128
256
512
1024
2048
4096
8192
16556
11. Consider a BAR that I wrote -1 to. It returns 0xFFFF_F003. How much address space (in bytes) would this device register require?
8
16
64
128
256
512
1024
2048
4096
8192
16556
12. Consider a BAR that I wrote -1 to. It returns 0xFFFF_FF02. How much address space (in bytes) would this device's register require?
8
16
64
128
256
512
1024
2048
4096
8192
16556
13. What is the maximum number of busses the PCI system will support?
14. What is the maximum number of devices the PCI system will support per bus?