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[/] [amber/] [trunk/] [hw/] [tests/] [ddr33.S] - Rev 61
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/*****************************************************************
// //
// Amber 2 Core DDR3 Memory Access //
// //
// This file is part of the Amber project //
// http://www.opencores.org/project,amber //
// //
// Description //
// Test back to back write-read accesses to DDR3 memory //
// //
// 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"
#define ARRAY_WORDS 0x40
.section .text
.globl main
main:
ldr r10, DDRBase
mov r5, #40 @ main loop count
1: ldr r0, AdrRanNum
ldmia r0,{r1-r2}
orr r2, r2, r1, lsl #8
mov r2, r2, lsl #2
add r2, r2, r10
ldr r3, Data0
ldr r6, Data1
ldr r8, Data2
@ DDR accesses
str r3, [r2]
ldr r4, [r2], #4
str r6, [r2], #4
str r8, [r2], #-4
ldr r7, [r2], #4
ldr r9, [r2]
cmp r3, r4
movne r10, #10
bne testfail
cmp r6, r7
movne r10, #20
bne testfail
cmp r8, r9
movne r10, #30
bne testfail
subs r5, r5, #1
bne 1b
b testpass
testfail:
ldr r11, AdrTestStatus
str r10, [r11]
b testfail
testpass:
ldr r11, AdrTestStatus
mov r10, #17
str r10, [r11]
b testpass
/* Write 17 to this address to generate a Test Passed message */
AdrTestStatus: .word ADR_AMBER_TEST_STATUS
AdrRanNum: .word ADR_AMBER_TEST_RANDOM_NUM
DDRBase: .word 0x20000
Data0: .word 0xff00cc55
Data1: .word 0x7711ff17
Data2: .word 0x12345678
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