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I can see from help-search that there's a "<port_space>.read", but I don't know how to find the <port_space> name for the CPU.

OOO
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  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Oct 26 '21 at 14:19

2 Answers2

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port_space attribute of a processor core points to a memory space object that is used for port accesses. You can access to memory space object directly using get/set (for non-architectural access), read/write (for architectural access) for example:

simics> board.mb.cpu0.core[0][0]->port_space 
"board.mb.cpu0.ports_proxy[0][0]"
simics> board.mb.cpu0.ports_proxy[0][0].write 0xcf9 0xff size=1
[board.mb.nb.pci_bus info] sending hot_reset

You can also traverse the memory space to find what is exactly mapped there:

simics> board.mb.cpu0.ports_proxy[0][0].map 
+---------+-------------------+--+------+------+------+----+-----+----+
|     Base|Object             |Fn|Offset|Length|Target|Prio|Align|Swap|
+---------+-------------------+--+------+------+------+----+-----+----+
|-default-|board.mb.port_mem_m|  |   0x0|      |      |    |     |    |
+---------+-------------------+--+------+------+------+----+-----+----+
simics> board.mb.port_mem_m.map 
+----+-----------------+--+------+-------+------+----+-----+----+
|Base|Object           |Fn|Offset| Length|Target|Prio|Align|Swap|
+----+-----------------+--+------+-------+------+----+-----+----+
| 0x0|board.mb.port_mem|  |   0x0|0x10000|      |   0|     |    |
+----+-----------------+--+------+-------+------+----+-----+----+
simics> board.mb.port_mem.map 
+---------+-------------------------------+--+------+------+------+----+-----+----+
|     Base|Object                         |Fn|Offset|Length|Target|Prio|Align|Swap|
+---------+-------------------------------+--+------+------+------+----+-----+----+
|    0x402|board.mb.conf                  |  |   0x0|   0x1|      |   0|     |    |
|    0x510|board.mb.conf                  | 3|   0x0|   0x2|      |   0|     |    |
|    0x511|board.mb.conf                  | 4|   0x0|   0x1|      |   0|     |    |
|    0xcf8|board.mb.nb.bridge.bank.io_regs|  | 0xcf8|   0x4|      |   0|     |    |
|    0xcf9|board.mb.sb.cf9                |  |   0x0|   0x1|      |   0|     |    |
|    0xcfc|board.mb.nb.bridge.bank.io_regs|  | 0xcfc|   0x4|      |   0|     |    |
|    0xcfd|board.mb.nb.bridge.bank.io_regs|  | 0xcfd|   0x2|      |   0|     |    |
|    0xcfe|board.mb.nb.bridge.bank.io_regs|  | 0xcfe|   0x2|      |   0|     |    |
|    0xcff|board.mb.nb.bridge.bank.io_regs|  | 0xcff|   0x1|      |   0|     |    |
|   0xfff0|board.mb.conf                  |  |   0x0|   0x1|      |   0|     |    |
|   0xfff1|board.mb.conf                  | 1|   0x0|   0x1|      |   0|     |    |
|   0xfff2|board.mb.conf                  | 2|   0x0|   0x2|      |   0|     |    |
|   0xfff4|board.mb.shadow                |  |   0x0|   0x1|      |   0|     |    |
|   0xfff5|board.mb.shadow                |  |   0x1|   0x1|      |   0|     |    |
|-default-|board.mb.nb.pci_bus.io_space   |  |   0x0|      |      |    |     |    |
+---------+-------------------------------+--+------+------+------+----+-----+----+
Evgenii Iuliugin
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0

To find a port_space object, you can try below command in CLI (command line interface) window:

simics> list-objects iface = port_space -all
Lin Yonghui
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