ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 178

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
4.4: GPDMA Source Address Register
Used to set and keep track of the Source Address during a DMA transfer. This is the system address that
increments during a DMA transfer. A bit in the Transfer Count and Flag Register determines if the source
address is internal to the IBM3206K0424 or is a system address.
Length
Type
Address
Power on Value
Restrictions
General Purpose DMA (GPDMA)
Page 178 of 676
Bit(s)
8-7
4-3
6
5
2
1
0
Word Swap Mode
Disable access to internal array
Enable limiting DMA burst to
cache line size
PCI target cache line size
Data Transfer Break Type
Enable Receive DMAs
Enable Transmit DMAs
Function
64 bits
Read/Write
XXXX 0128
X’0000000000000000’
None
This field controls word swapping for data being transferred to PCINT. The word swap-
ping is done as part of endian alignment. The bits are defined as follows:
00
01
10
11
When this bit is set, the internal array cannot be read or written. This can be used to
ensure that the array is not inadvertently read or written while DMAs are in progress,
causing unpredictable results.
This bit on causes a DMA burst to terminate upon crossing a cache line boundary of the
PCI target.
This field indicates the cache line size if aligning DMAs to the cache line size of the PCI
target (see bit 5).
00
01
10
11
This bit on causes a re-arbitrate request from PCI to "immediately" stop moving data
and resurface a new request to move the remainder of the data. When reset, GPDMA
stops data movement at the next Cache line boundary.
This bit on enables DMA transfers out of the IBM3206K0424.
This bit on enables DMA transfers into the IBM3206K0424.
No Swap: The 32-bit words being transferred will not be swapped by PCINT
Swap: The 32-bit words being transferred will always be swapped by PCINT
Endian Swap: The words will be swapped if byte swapping is being done.
Anti-endian Swap: The words will be swapped if byte swapping is not being done.
32 bytes
64 bytes
128 bytes
256 bytes
Description
pnr25.chapt04.01
August 14, 2000
Preliminary