chapter6 - PacoReinaCampo/PU-OR1K GitHub Wiki

DATA FORMATS

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INSTRUCTION CACHE

Instruction Inputs/Outputs AMBA4 AXI-Lite Bus

Signals of the Read and Write Address channels

...

Write Port	Read Port	Size	Direction	Description
`AWID`	`ARID`	`AXI_ID_WIDTH`	Output	Address ID, to identify multiple streams
`AWADDR`	`ARADDR`	`AXI_ADDR_WIDTH`	Output	Address of the first beat of the burst
`AWLEN`	`ARLEN`	8	Output	Number of beats inside the burst
`AWSIZE`	`ARSIZE`	3	Output	Size of each beat
`AWBURST`	`ARBURST`	2	Output	Type of the burst
`AWLOCK`	`ARLOCK`	1	Output	Lock type, to provide atomic operations
`AWCACHE`	`ARCACHE`	4	Output	Memory type, progress through the system
`AWPROT`	`ARPROT`	3	Output	Protection type
`AWQOS`	`ARQOS`	4	Output	Quality of Service of the transaction
`AWREGION`	`ARREGION`	4	Output	Region identifier, physical to logical
`AWUSER`	`ARUSER`	`AXI_USER_WIDTH`	Output	User-defined data
`AWVALID`	`ARVALID`	1	Output	xVALID handshake signal
`AWREADY`	`ARREADY`	1	Input	xREADY handshake signal

:Signals of the Read and Write Address channels

Signals of the Read and Write Data channels

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Write Port	Read Port	Size	Direction	Description
`WID`	`RID`	`AXI_ID_WIDTH`	Output	Data ID, to identify multiple streams
`WDATA`	`RDATA`	`AXI_DATA_WIDTH`	Output	Read/Write data
`--`	`RRESP`	2	Output	Read response, current RDATA status
`WSTRB`	`--`	`AXI_STRB_WIDTH`	Output	Byte strobe, WDATA signal
`WLAST`	`RLAST`	1	Output	Last beat identifier
`WUSER`	`RUSER`	`AXI_USER_WIDTH`	Output	User-defined data
`WVALID`	`RVALID`	1	Output	xVALID handshake signal
`WREADY`	`RREADY`	1	Input	xREADY handshake signal

:Signals of the Read and Write Data channels

Signals of the Write Response channel

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Write Port	Size	Direction	Description
`BID`	`AXI_ID_WIDTH`	Input	Write response ID, to identify multiple streams
`BRESP`	2	Input	Write response, to specify the burst status
`BUSER`	`AXI_USER_WIDTH`	Input	User-defined data
`BVALID`	1	Input	xVALID handshake signal
`BREADY`	1	Output	xREADY handshake signal

:Signals of the Write Response channel

Instruction Inputs/Outputs AMBA3 AHB-Lite Bus

Port	Size	Direction	Description
`HRESETn`	1	Input	Asynchronous Active Low Reset
`HCLK`	1	Input	System Clock Input

`IHSEL`	1	Output	Instruction Bus Select
`IHADDR`	`PLEN`	Output	Instruction Address Bus
`IHRDATA`	`XLEN`	Input	Instruction Read Data Bus
`IHWDATA`	`XLEN`	Output	Instruction Write Data Bus
`IHWRITE`	1	Output	Instruction Write Select
`IHSIZE`	3	Output	Instruction Transfer Size
`IHBURST`	3	Output	Instruction Transfer Burst Size
`IHPROT`	4	Output	Instruction Transfer Protection Level
`IHTRANS`	2	Output	Instruction Transfer Type
`IHMASTLOCK`	1	Output	Instruction Transfer Master Lock
`IHREADY`	1	Input	Instruction Slave Ready Indicator
`IHRESP`	1	Input	Instruction Transfer Response

:Instruction Inputs/Outputs AMBA3 AHB-Lite Bus

Instruction Inputs/Outputs WishBone Bus

Port	Size	Direction	Description
`rst`	1	Input	Synchronous Active High Reset
`clk`	1	Input	System Clock Input

`iadr`	`AW`	Input	Instruction Address Bus
`idati`	`DW`	Input	Instruction Input Bus
`idato`	`DW`	Output	Instruction Output Bus
`isel`	`DW/8`	Input	Byte Select Signals
`iwe`	1	Input	Write Enable Input
`istb`	1	Input	Strobe Signal/Core Select Input
`icyc`	1	Input	Valid Bus Cycle Input
`iack`	1	Output	Bus Cycle Acknowledge Output
`ierr`	1	Output	Bus Cycle Error Output
`iint`	1	Output	Interrupt Signal Output

:Instruction Inputs/Outputs WishBone Bus

DATA CACHE

Data Inputs/Outputs AMBA4 AXI-Lite Bus

Signals of the Read and Write Address channels

...

Write Port	Read Port	Size	Direction	Description
`AWID`	`ARID`	`AXI_ID_WIDTH`	Output	Address ID, to identify multiple streams
`AWADDR`	`ARADDR`	`AXI_ADDR_WIDTH`	Output	Address of the first beat of the burst
`AWLEN`	`ARLEN`	8	Output	Number of beats inside the burst
`AWSIZE`	`ARSIZE`	3	Output	Size of each beat
`AWBURST`	`ARBURST`	2	Output	Type of the burst
`AWLOCK`	`ARLOCK`	1	Output	Lock type, to provide atomic operations
`AWCACHE`	`ARCACHE`	4	Output	Memory type, progress through the system
`AWPROT`	`ARPROT`	3	Output	Protection type
`AWQOS`	`ARQOS`	4	Output	Quality of Service of the transaction
`AWREGION`	`ARREGION`	4	Output	Region identifier, physical to logical
`AWUSER`	`ARUSER`	`AXI_USER_WIDTH`	Output	User-defined data
`AWVALID`	`ARVALID`	1	Output	xVALID handshake signal
`AWREADY`	`ARREADY`	1	Input	xREADY handshake signal

:Signals of the Read and Write Address channels

Signals of the Read and Write Data channels

...

Write Port	Read Port	Size	Direction	Description
`WID`	`RID`	`AXI_ID_WIDTH`	Output	Data ID, to identify multiple streams
`WDATA`	`RDATA`	`AXI_DATA_WIDTH`	Output	Read/Write data
`--`	`RRESP`	2	Output	Read response, current RDATA status
`WSTRB`	`--`	`AXI_STRB_WIDTH`	Output	Byte strobe, WDATA signal
`WLAST`	`RLAST`	1	Output	Last beat identifier
`WUSER`	`RUSER`	`AXI_USER_WIDTH`	Output	User-defined data
`WVALID`	`RVALID`	1	Output	xVALID handshake signal
`WREADY`	`RREADY`	1	Input	xREADY handshake signal

:Signals of the Read and Write Data channels

Signals of the Write Response channel

...

Write Port	Size	Direction	Description
`BID`	`AXI_ID_WIDTH`	Input	Write response ID, to identify multiple streams
`BRESP`	2	Input	Write response, to specify the burst status
`BUSER`	`AXI_USER_WIDTH`	Input	User-defined data
`BVALID`	1	Input	xVALID handshake signal
`BREADY`	1	Output	xREADY handshake signal

:Signals of the Write Response channel

Data Inputs/Outputs AMBA3 AHB-Lite Bus

Port	Size	Direction	Description
`HRESETn`	1	Input	Asynchronous Active Low Reset
`HCLK`	1	Input	System Clock Input

`DHSEL`	1	Output	Data Bus Select
`DHADDR`	`PLEN`	Output	Data Address Bus
`DHRDATA`	`XLEN`	Input	Data Read Data Bus
`DHWDATA`	`XLEN`	Output	Data Write Data Bus
`DHWRITE`	1	Output	Data Write Select
`DHSIZE`	3	Output	Data Transfer Size
`DHBURST`	3	Output	Data Transfer Burst Size
`DHPROT`	4	Output	Data Transfer Protection Level
`DHTRANS`	2	Output	Data Transfer Type
`DHMASTLOCK`	1	Output	Data Transfer Master Lock
`DHREADY`	1	Input	Data Slave Ready Indicator
`DHRESP`	1	Input	Data Transfer Response

:Data Inputs/Outputs AMBA3 AHB-Lite Bus

Data Inputs/Outputs WishBone Bus

Port	Size	Direction	Description
`rst`	1	Input	Synchronous Active High Reset
`clk`	1	Input	System Clock Input

`dadr`	`AW`	Input	Data Address Bus
`ddati`	`DW`	Input	Data Input Bus
`ddato`	`DW`	Output	Data Output Bus
`dsel`	`DW/8`	Input	Byte Select Signals
`dwe`	1	Input	Write Enable Input
`dstb`	1	Input	Strobe Signal/Core Select Input
`dcyc`	1	Input	Valid Bus Cycle Input
`dack`	1	Output	Bus Cycle Acknowledge Output
`derr`	1	Output	Bus Cycle Error Output
`dint`	1	Output	Interrupt Signal Output

:Data Inputs/Outputs WishBone Bus