oh/elink/hdl/elink_regmap.v

//MEMORY MAP

//[31:20] = LINKID
//[19:16] = GROUP SELECT
//[15]    = MMU SELECT (for RX/TX)
//[14:6]  = USED BY MMU ONLY 
//[5:2]   = REGISTER ADDRESS (0..15)
//[1:0]   = IGNORED (no byte access)

//Link register groups addr[19:16]
`define EGROUP_CHIP   4'hF //reserved for chip MMR
`define EGROUP_TX     4'hE 
`define EGROUP_RX     4'hD

//ELINK TX registers
`define ELTXCFG       4'h0 //E0000-config
`define ELTXSTATUS    4'h1 //E0004-tx status
`define ELTXGPIO      4'h2 //E0008-direct data for tx pins
`define ELRESET       4'h3 //E000C-reset
`define ELCLK         4'h4 //E0010-clock configuration
`define ELCHIPID      4'h5 //E0014-Epiphany chip id for colid/rowid pins 
`define ELVERSION     4'h6 //E0018-version #
`define ELTXTEST      4'h7 //E001C-control for driving SERDES directly
`define ELTXDSTADDR   4'h8 //E0020-static addr (for testing)
`define ELTXDATA      4'h9 //E0024-static data (for testing)
`define ELTXSRCADDR   4'hA //E0028-static source addr (for testing)

//ELINK RX registers
`define ELRXCFG       4'h0 //D0000-config
`define ELRXSTATUS    4'h1 //D0004-status register
`define ELRXGPIO      4'h2 //D0008-sampled data
`define ELRXRR        4'h3 //D000C-read response address
`define ELRXBASE      4'h4 //D0010-memory base for remap
`define ELRESERVED    4'h5 //D0014-reserved
`define EMAILBOXLO    4'h6 //D0018-mailbox
`define EMAILBOXHI    4'h7 //D001c-mailbox
`define EDMACFG       4'h8 //D0020-dma
`define EDMACOUNT     4'h9 //D0024-dma
`define EDMASTRIDE    4'hA //D0028-dma 
`define EDMASRCADDR   4'hB //D002c-dma
`define EDMADSTADDR   4'hC //D0028-dma
`define EDMASTATUS    4'hD //D0030-dma