Intel CONTROLLERS 413808 - Manual (Page 451)

Intel ® 413808 and 413812 I/O Controllers in TPER Mode
October 2007 Developer’s Manual
Order Number: 317805-001US 451
SRAM DMA Unit (SDMA)—Intel
®
413808 and 413812
5.4.6 LocalToHost Control/Status Register - L2H_CSR
The LocalToHost Control/Status Register (L2H_CSR) provides the control and status for
the LocalToHost channel.
Table 304. LocalToHost Control/Status Register - L2H_CSR
Bit Default Description
31:27 00000
2
Reserved
26:24 000
2
Error Flags - Read/Clear
One or more of these bits is set to indicate an error has occurred with the DMA operation. The precise
cause of the error is determined by reading the ATU or XSISC error registers.
23:02 0000H Reserved
01 0
2
Channel Go (CHGO) - Read/Set
Set this bit to begin the DMA operation.
This bit must be cleared while the DMA registers are being set up. The CHGO bit is set by firmware to
begin the DMA operation. When the DMA operation begins the hardware clears this bit. Note that
clearing of this bit does not indicate the DMA operation is complete, rather that the hardware has
started processing it.
00 0
2
Enable Register - Read/Write
Must be set for proper operation. A value of zero (when the CHGO bit is set) has unpredictable results.
Coprocessor
IOP
Attributes
Attributes
28 24 20 16 12 8 4 0 31
rv
na
rv
na
rv
na
rv
na
rv
na
rc
na
rv
na
rc
na
rv
na
rv
na
rv
na
rv
na
rv
na
rv
na
rv
na
rc
na
rv
na
rv
na
rv
na
rv
na
rv
na
rv
na
rv
na
rw
na
rv
na
rv
na
rv
na
rv
na
rv
na
rv
na
rs
na
rw
na
Attribute Legend:
RV = Reserved
PR = Preserved
RS = Read/Set
RW = Read/Write
RC = Read Clear
RO = Read Only
NA = Not Accessible
Internal bus address offset
1823CH