HyperTransport™ I/O Link Specification - HyperTransport Consortium

HyperTransport I/O Link Specification Revision 3.00
Table 102. System Management Request Broadcast Packet Format
Bit-Time 7 6 5 4 3 2 1 0
0 SeqID[3:2] Cmd[5:0]: 111010
1 PassPW SeqID[1:0] UnitID[4:0]
2 Reserved
3 Reserved
4 SysMgtCmd[7:0]
5 Addr[23:20] SysMgtCmd[11:8]
6 Addr[31:24]
7 Addr[39:32]
For both upstream and downstream cases, the type of system management request (SysMgtCmd[11:0])
is encoded as shown in Table 103. Gen3 devices are required to decode all 12 bits of SysMgtCmd.
Table 103. System Management Request Type Encoding
SysMgtCmd
Command Type
0000 0000 xxxx Reserved
0000 00xx xxxx x86 Encoding, see Appendix F.2.1
0000 0100 xxxx SHUTDOWN
Bits [3:0]: Implementation-specific
0000 0101 xxxx HALT
Bits [3:0]: Implementation-specific
0000 011x xxxx x86 Encoding, see Appendix F.2.1
0000 100x xxxx x86 Encoding, see Appendix F.2.1
0000 1010 xxxx x86 Encoding, see Appendix F.2.1
0000 1011 xxxx INTx Message
Bits [3:2]: INTA/B/C/D select
Bit [1]: Assert=1, Deassert=0
Bit [0]: Reserved
0000 110x xxxx x86 Encoding, see Appendix F.2.1
0000 1110 0000 INT_PENDING
0000 1110 0001 x86 Encoding, see Appendix F.2.1
0000 1110 0010-
0000 1111 1111
Reserved
Chapter 8 System Management 171