CH4_SWHSSRCREG

         Channelx Software handshake Source Register.


Module Instance	Base Address	Register Address
`i_dma__dmac1_ahb_slv__10dc0000__Channel4_Registers_Address_Block__SEG_L4_AHB_dmac1_s_0x0_0x10000`	`0x10DC0400`	`0x10DC0438`

Size: 64

Offset: 0x38

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.


Bit Fields
63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48
`RSVD_DMAC_CHx_SWHSSRCREG_6to63` `RO 0x0`
47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
`RSVD_DMAC_CHx_SWHSSRCREG_6to63` `RO 0x0`
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
`RSVD_DMAC_CHx_SWHSSRCREG_6to63` `RO 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`RSVD_DMAC_CHx_SWHSSRCREG_6to63` `RO 0x0`										`SWHS_LST_SRC_WE` `WO 0x0`	`SWHS_LST_SRC` `RW 0x0`	`SWHS_SGLREQ_SRC_WE` `WO 0x0`	`SWHS_SGLREQ_SRC` `RW 0x0`	`SWHS_REQ_SRC_WE` `WO 0x0`	`SWHS_REQ_SRC` `RW 0x0`

CH4_SWHSSRCREG Fields

Bit Name Description Access Reset

63:6

RSVD_DMAC_CHx_SWHSSRCREG_6to63

DMAC Channelx Software Handshake Source Register (bits 6to63) Reserved bits - Read Only

RO

0x0

SWHS_LST_SRC_WE

Write Enable bit for Software Handshake Last Request for Channel Source.

Value	Description
0x0	Disables write to the SWHS_LAST_SRC bit
0x1	Enables write to the SWHS_LAST_SRC bit

WO

0x0

SWHS_LST_SRC

Software Handshake Last Request for Channel Source.
This bit is used to request LAST dma source data transfer if software handshaking method is
selected for the source of the corresponding channel.
This bit is ignored if software handshaking is not enabled for the source of the Channelx or if the source of Channelx is not the flow
controller.
CHx_SWHSSrcReg.SWHS_Req_Src bit must be set to 1 for DW_axi_dmac to treat it as a valid software handshaking request.
If CHx_SWHSSrcReg.SWHS_SglReq_Src is set to 1, the LAST
request is for SINGLE dma transaction (AXI burst length = 1), else the request is treated as a BURST transaction request.
DW_axi_dmac clears this bit to 0 once software reads
CHx_SWHSSrcReg.SWHS_Ack_Src bit and sees it as 1.
Software can only set this bit to 1; it is not allowed to clear this bit to 0; only DW_axi_dmac can clear this bit.
Note: SWHS_Lst_Src bit is written only if the corresponding write enable bit, SWHS_Lst_Src_WE is asserted on the same register write operation and if the Channelx is enabled in the DMAC_ChEnReg register. This allows software to set a bit in the CHx_SWHSSrcReg register without performing a read-modified write operation.

Value	Description
0x0	Source peripheral indication that the curent transfer is not the last transfer
0x1	Source peripheral indication to dmac that the current transfer is the last transfer

RW

0x0

SWHS_SGLREQ_SRC_WE

Write Enable bit for Software Handshake Single Request for Channel Source.

Value	Description
0x0	Disables write to the SWHS_SGLREQ_SRC bit
0x1	Enables write to the SWHS_SGLREQ_SRC bit

WO

0x0

SWHS_SGLREQ_SRC

Software Handshake Single Request for Channel Source.
This bit is used to request SINGLE (AXI burst length = 1) dma source data transfer if
software handshaking method is selected for the source of the corresponding channel. This bit is ignored if software handshaking is not enabled for the source of the Channelx. The functionality of
this field depends on whether the peripheral is the flow controller.
DW_axi_dmac clears this bit to 0 once software reads CHx_SWHSSrcReg.SWHS_Ack_Src bit and sees it as 1. Software can only set
this bit to 1; it is not allowed to clear this bit to 0; only DW_axi_dmac can clear this bit.
Note: SWHS_SglReq_Src bit is written only if the corresponding write enable bit, SWHS_SglReq_Src_WE is asserted on the same register write operation and if the Channelx is enabled in the DMAC_ChEnReg register. This allows software to set a bit in the CHx_SWHSSrcReg register without performing a read-modified write operation.

Value	Description
0x0	Source peripheral is not requesting for a single transfer
0x1	Source peripheral request for a single dma transfer

RW

0x0

SWHS_REQ_SRC_WE

Write Enable bit for Software Handshake Request for Channel Source.
Note: This bit always returns 0 on a read back.

Value	Description
0x0	Disables write to the SWHS_REQ_SRC bit
0x1	Enables write to the SWHS_REQ_SRC bit

WO

0x0

SWHS_REQ_SRC

Software Handshake Request for Channel Source.
This bit is used to request dma source data transfer if software handshaking method is selected
for the source of the corresponding channel.
This bit is ignored if software handshaking is not enabled for the source of the Channelx. The functionality of this field depends on whether the
peripheral is the flow controller or not.
DW_axi_dmac clears this bit to 0 once software reads CHx_SWHSSrcReg.SWHS_Ack_Src bit and sees it as 1. Software can only set this bit to 1; it is not
allowed to clear this bit to 0; only DW_axi_dmac can clear this bit.
Note: SWHS_Req_Src bit is written only if the corresponding write enable bit, SWHS_Req_Src_WE is asserted on the same register write operation and if the Channelx is enabled in the DMAC_ChEnReg register. This allows software to set a bit in the CHx_SWHSSrcReg register without performing a read-modified write operation.

Value	Description
0x0	Source peripheral is not requesting for a burst transfer
0x1	Source peripheral request for a dma transfer

RW

0x0