參數(shù)資料
型號: SII0680A
廠商: Silicon Image, Inc.
英文描述: PCI to IDE/ATA
中文描述: PCI到IDE / ATA的
文件頁數(shù): 73/124頁
文件大小: 820K
代理商: SII0680A
Silicon Image, Inc.
9.7.3
PCI Bus Master – IDE1
Address Offset: 08
H
Access Type: Read/Write
Reset Value: 0x0000_0000
SiI0680A PCI to IDE/ATA
Data Sheet
2006 Silicon Image, Inc.
SiI-DS-0069-C
73
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
P
Reserved
P
P
R
I
P
P
Reserved
Reserved
P
R
P
This register defines the PCI bus master register for IDE Channel #1 in the SiI 0680A. The register bits are defined below.
Bit [31:24]
: Reserved (R). This bit field is reserved and returns zeros on a read.
Bit [23]
: PBM Simplex (R) – PCI Bus Master Simplex Only. This read-only bit field is hardwired to zero to
indicate that both IDE channels can operate as PCI bus master at any time.
Bit [22]
: PBM DMA Cap 1 (R/W) – PCI Bus Master DMA Capable – Device 1. This bit field has no effect. The
device is always capable of DMA as a PCI bus master.
Bit [21]
: PBM DMA Cap 0 (R/W) – PCI Bus Master DMA Capable – Device 0. This bit field has no effect. The
device is always capable of DMA as a PCI bus master.
Bit [20:19]
: Reserved (R). This bit field is reserved and returns zeros on a read.
Bit [18]
: IDE1 DMA Comp (R/W1C) – IDE1 DMA Completion Interrupt. During write DMA operation, this bit set
indicates that the IDE1 interrupt has been asserted and all data has been written to system memory. During
Read
DMA,
this
bit
set
indicates
that
This bit must be W1C by software when set during DMA operation (bit 0 is set). During normal operation, this bit
reflects IDE1 interrupt line.
Bit [17]
: PBM Error (R/W1C) – PCI Bus Master Error – IDE1. This bit set indicates that a PCI bus error
occurred while the SiI 0680A was bus master. Additional information is available in the PCI Status register in PCI
Configuration space.
Bit [16]
: PBM Active (R) – PCI Bus Master Active – IDE1. This bit set indicates that the SiI 0680A is currently
active in a data transfer as PCI bus master. This bit is cleared by the hardware when all data transfers have
completed or PBM Enable bit is not set.
Bit [15:08]
: Reserved (R). This bit field is reserved and returns zeros on a read.
Bit [07:04]
: Reserved (R). This bit field is reserved and returns zeros on a read.
Bit [03]
: PBM Rd-Wr (R/W) – PCI Bus Master Read-Write Control. This bit is set to specify a DMA write
operation from IDE1 to system memory. This bit is cleared to specify a DMA read operation from system
memory to an IDE1 device.
Bit [02:01]
: Reserved (R). This bit field is reserved and returns zeros on a read.
Bit [00]
: PBM Enable (R/W) – PCI Bus Master Enable – IDE1. This bit is set to enable PCI bus master
operations for IDE Channel #1. PCI bus master operations can be halted by clearing this bit, but will erase all
state information in the control logic. If this bit is cleared while the PCI bus master is active, the operation will be
aborted and the data discarded. While this bit is set, accessing IDE1 Task File or PIO data registers will be
terminated with Target-Abort.
the
IDE1
interrupt
has
been
asserted.
9.7.4
Address Offset: 0C
H
Access Type: Read/Write
Reset Value: 0x0000_0000
PRD Table Address – IDE1
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
PRD Table Address – IDE1
R
This register defines the PRD Table Address register for IDE Channel #1 in the SiI 0680A. The register bits are defined below.
Bit [31:02]
: PRD Table Address (R/W) – Physical Region Descriptor Table Address. This bit field defines the
Descriptor Table base address.
Bit [01:00]
: Reserved (R). This bit field is reserved and returns zeros on a read.
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