参数资料
型号: GT-48001A
厂商: Galileo Technology Services, LLC
英文描述: Switched Ethernet Controller For 10BaseX(10BaseX交换式快速以太网控制器)
中文描述: 交换式以太网控制器10BaseX(10BaseX交换式快速以太网控制器)
文件页数: 37/101页
文件大小: 1235K
代理商: GT-48001A
GT-48001A Switched Ethernet Controller
40
Revision 1.6
10.3.7 PACKET_TRANSFER Message (GalNet to CPU 16 Block Buffer)
A burst of up to 8 32-bit words from the source GalNet device to the target CPU buffer which contains the packet. This
message is used when the GalNet device forwards one of the following packets directly to the CPU 16 block buffer:
Unicast packets destined for the CPU (Device Number in the address table is equal to the CPU number)
Multicast packets
Unknown packets (if set by bit 6 in the Global Control Register, 0x140028)
BPDU messages
Sniffer packets when the CPU is the target sniffer
EASE packets
The data is entered starting at the 8th word (33rd byte) of the next free block. Words 1 to 7 are left empty for user pur-
poses. The address of this packet transfer is based upon the CPU Buffer Base Address.
Table 17: PACKET_TRANSFER Message (GalNet to CPU)
The PACKET_TRANSFER message can be transferred using any burst size over the PCI. The GalNet device uses a
burst of 8 words.
PCI Bi ts
D escr ip tio n
Address
[31:15]
[14:11]
[10:2]
[1:0]
CPU Buffer Base Address (0x140034)
Offset Counter (16 total blocks)
Address within the buffer
‘0’
Data 0
[31:0]
Data 0
----
Data 7
[31:0]
Data 7
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