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[/] [amber/] [trunk/] [hw/] [tests/] [ethmac_tx.S] - Rev 20
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/*****************************************************************// //// Amber 2 System Ethernet MAC Test //// //// This file is part of the Amber project //// http://www.opencores.org/project,amber //// //// Description //// Tests ethernet MAC frame transmit and receive functions //// and Ethmac DMA access to hiboot mem. Ethmac is put in //// loopback mode and a packet is transmitted and received. //// //// Author(s): //// - Conor Santifort, csantifort.amber@gmail.com //// ////////////////////////////////////////////////////////////////////// //// Copyright (C) 2010 Authors and OPENCORES.ORG //// //// This source file may be used and distributed without //// restriction provided that this copyright statement is not //// removed from the file and that any derivative work contains //// the original copyright notice and the associated disclaimer. //// //// This source file is free software; you can redistribute it //// and/or modify it under the terms of the GNU Lesser General //// Public License as published by the Free Software Foundation; //// either version 2.1 of the License, or (at your option) any //// later version. //// //// This source is distributed in the hope that it will be //// useful, but WITHOUT ANY WARRANTY; without even the implied //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// PURPOSE. See the GNU Lesser General Public License for more //// details. //// //// You should have received a copy of the GNU Lesser General //// Public License along with this source; if not, download it //// from http://www.opencores.org/lgpl.shtml //// //*****************************************************************/#include "amber_registers.h".section .text.globl mainmain:ldr r0, AdrEthMacMemBase/* Write the Transmit Packet Buffer Descriptor */ldr r1, TxBufferW0str r1, [r0]ldr r1, TxBufferW1add r1, r1, #2 @ shift start by 2 bytesstr r1, [r0, #4]/* Write the Receive Packet Buffer Descriptor */ldr r1, RxBufferW0str r1, [r0, #0x200]ldr r1, RxBufferW1str r1, [r0, #0x204]/* Copy a Frame into the transmit buffer */ldr r0, TxBufferW1ldr r1, =TxFrameldr r2, =EndTxFrame@ copy 8 words at a time1: ldmia r1!, {r3-r10}stmia r0!, {r3-r10}cmp r1, r2blt 1b/* Set Mode Register */ldr r0, AdrEthMacModerldr r1, EthMacModerValuestr r1, [r0]/* Start transmit */ldr r0, AdrEthMacMemBaseldr r1, TxBufferW0orr r1, r1, #0x8000str r1, [r0]/* Wait until receive complete - Wait for Empty bit to go low */2: ldr r1, [r0, #0x200]ands r1, r1, #0x8000bne 2b/* Wait a bit */mov r0, #203: subs r0, r0, #1bne 3b/* Check receive buffer */ldr r0, RxBufferW1add r3, r0, #2ldr r1, =TxFrameadd r1, r1, #4ldr r2, =EndTxFrame@ end of frame is crc which is different so dont check itsub r2, r2, #4@ there is a 2-byte shift from tx to rx buffer@ so load in the data from the rx buffer in 2 byte chunks@ and re-arrange to match the tx buffer4: ldr r4, [r0, #4]!mov r6, r4, lsl #16ldr r5, [r3], #4ldr r12, LoMaskand r5, r5, r12orr r7, r5, r6ldr r8, [r1], #4cmp r7, r8movne r10, #100bne testfailcmp r1, r2blt 4bb testpasstestfail:ldr r11, AdrTestStatusstr r10, [r11]b testfailtestpass:ldr r11, AdrTestStatusmov r10, #17str r10, [r11]b testpass/* Write 17 to this address to generate a Test Passed message */AdrTestStatus: .word ADR_AMBER_TEST_STATUSAdrEthMacModer: .word ADR_ETHMAC_MODERAdrEthMacMIIModer: .word ADR_ETHMAC_MIIMODERAdrEthMacMIICommand: .word ADR_ETHMAC_MIICOMMANDAdrEthMacMIIAddress: .word ADR_ETHMAC_MIIADDRESSAdrEthMacMIITxData: .word ADR_ETHMAC_MIITXDATAAdrEthMacMIIRxData: .word ADR_ETHMAC_MIIRXDATAAdrEthMacMIIStatus: .word ADR_ETHMAC_MIISTATUSAdrEthMacMemBase: .word ADR_ETHMAC_BDBASEEthMacModerDefault: .word 0x0000a000ExpectedMIIReadBack: .word 0x0000ffffLoMask: .word 0x0000ffff/* [31:16] = length in bytes, Bit[15] = ready, Bit [13] = wrap bit */TxBufferW0: .word 0x00a02800/* [31:16] = length in bytes, Bit[15] = empty, Bit [13] = wrap bit */RxBufferW0: .word 0x0000a800/* Buffer Pointer */TxBufferW1: .word 0x28001000RxBufferW1: .word 0x28001200/*Ethmac Mode Register[15] = Add pads to short frames[13] = CRCEN[7] = loopback[5] = 1 for promiscuous, 0 rx only frames that match mac address[1] = txen[0] = rxen*/EthMacModerValue: .word 0xa0a3TxFrame:.word 0x0e000000.word 0xa0583e0c @ rx 1200: 3e0c 0e00.word 0x554e5300 @ rx 1204: 5300 a058.word 0x0008304c.word 0x90000045.word 0x00400000.word 0xd5b61140.word 0x0501a8c0.word 0x3201a8c0.word 0x01080203.word 0xb6c47c00.word 0xf67d4fc7.word 0x00000000.word 0x02000000.word 0xa3860100.word 0x03000000.word 0x06000000.word 0x01000000.word 0x18000000.word 0x025b8f02.word 0x02000000.word 0x00003170.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x24000000.word 0x01070001.word 0x00143ed5.word 0x00000000.word 0x2c043c7f.word 0x6c41657c.word 0x8cc37e87.word 0x2340a928.word 0x0026048e.word 0xec587a0e.word 0x00000000.word 0x00080000.word 0x00080000.word 0x00000000EndTxFrame:.word 0.word 0.word 0.word 0.word 0.word 0.word 0/* ========================================================================= *//* ========================================================================= */
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