參數(shù)資料
型號: GT-48004A
廠商: Galileo Technology Services, LLC
英文描述: Four Port Switched Fast Ethernet Controller(四端口、交換式快速以太網(wǎng)控制器)
中文描述: 四端口交換式快速以太網(wǎng)控制器(四端口,交換式快速以太網(wǎng)控制器)
文件頁數(shù): 44/106頁
文件大?。?/td> 953K
代理商: GT-48004A
GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
42
11.3.3 BUFFER_REQUEST Message (GalNet to CPU)
A message from the source GalNet device to the target CPU to request a buffer
. This message is only used when a
unicast packet’s destination address is marked for Intervention Mode and will be forwarded to the CPU buffer.
Table 13: BUFFER_REQUEST Message (GalNet to CPU)
The BUFFER_REQUEST message must be transferred in a burst of two words over the PCI.
11.3.4 BUFFER_REQUEST Message (CPU to GalNet)
A message from the source CPU to the target GalNet device to request a buffer
.
Table 14: BUFFER_REQUEST Message (CPU to GalNet)
PC I B i t s
D escr ip ti on
Address
[31:11]
[10:3]
[2:0]
CPU Intervention Base Address (0ffset: 0x140048)
Offset Counter (256 total entries)
‘000’
Data 0
[31]
[30]
[29:28]
[27:25]
[24:22]
[21]
[20:10]
[9:0]
Sniffer (0-Sniffer type message)
Unknown (0-Unknown message)
‘0’
Source Port Number
Target Port Number
Multicast/Unicast (0-Unicast)
Byte Count
Source Buffer Address (divided by 0x600)
Data 1
[31:29]
[28:24]
[23:0]
‘0’
Target Device Number
‘0’
PC I B i t s
D escr ip ti on
Address
[31:27]
[26:22]
[21]
[20:18]
[17:13]
[12:0]
GalNet Protocol Region
Target Device Number
‘0’ (Internal registers)
‘101’ (BUFFER_REQUEST message)
Source CPU Device Number (bits [12:8] in 0x14 0030)
‘0’
Data 0
[31]
[30]
[29:28]
[27:25]
[24:22]
[21]
[20:10]
[9:0]
Sniffer (0-Sniffer type message)
Unknown (0-Unknown message)
‘0’
Reserved
Target Port Number
Multicast/Unicast (0-Unicast)
Byte Count
Reserved
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