Texas Instruments TMS320C645X User Manual
Page 23
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SRIO Functional Description
The type of received packet determines how the packet routing is handled. Reserved or undefined packet
types are destroyed before being processed by the logical layer functional blocks. This prevents erroneous
allocation of resources to them. Unsupported packet types are responded to with an error response
packet.
details the handling of such packets.
2.1.2.4
SRIO Packet Ftype/Ttype
The type of SRIO packet is determined by the combination of Ftype and Ttype fields in the packet.
lists all supported combinations of Ftype/Ttype and the corresponding decoded actions on the packets.
Table 2. Packet Type
Ftype
Ttype
Packet Type
Ftype=0,
Ttype=don't care
Ftype=2,
Ttype=0100b,
NREAD
Ttype=1100b,
Atomic inc
Ttype=1101b,
Atomic dec
Ttype=1110b,
Atomic set
Ttype=1111b,
Atomic clr
Ttype=others,
Ftype=5,
Ttype=0100b,
NWRITE
Ttype=0101b,
NWRITE_R
Ttype=1110b,
Atomic t&s
Ttype=others,
Ftype=6,
Ttype=don't care,
SWRITE
Ftype=7,
Ttype=don't care,
Congestion
Ftype=8,
Ttype=0000b,
Mtn Rd
Ttype=0001b,
Mtn Wr
Ttype=0010b,
Mtn Rd Resp
Ttype=0011b,
Mtn Wr Resp
Ttype=0100b,
Mtn Pt-Wr
Ttype=others,
Ftype=10,
Ttype=don't care,
Doorbell
Ftype=11,
Ttype=don't care,
Message
Ftype=13,
Ttype=0000b,
Resp(+Dbll Resp)
Ttype=0001b,
Message Resp
Ttype=1000b,
Resp w/payload
Ttype=other,
Undefined Ftype (1,3,4,9,12,14,15):
Packet type definition:
#define REQ_MAINT_RD
0x80 //0b10000000
// ftype=8
#define REQ_MAINT_WR
0x81 //0b10000001
// ftype=8
#define REQ_MAINT_PW
0x84 //0b10000100
// ftype=8
#define REQ_ATOMIC_INC 0x2C //0b00101100
// ftype=2
#define REQ_ATOMIC_DEC 0x2D //0b00101101
// ftype=2
#define REQ_ATOMIC_SET 0x2E //0b00101110
// ftype=2
#define REQ_ATOMIC_CLR 0x2F //0b00101111
// ftype=2
#define REQ_ATOMIC_TNS 0x5E //0b01011110
// ftype=5
#define REQ_NREAD
0x24 //0b00100100
// ftype=2
#define REQ_NWRITE
0x54 //0b01010100
// ftype=5
#define REQ_NWRITE_R
0x55 //0b01010101
// ftype=5
#define REQ_SWRITE
0x60 //0b01100000
// ftype=6
#define REQ_DOORBELL
0xA0 //0b10100000
// ftype=10
SPRU976 – March 2006
Serial RapidIO (SRIO)
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