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[/] [amber/] [trunk/] [hw/] [tests/] [stm_stream.S] - Rev 71
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/*****************************************************************
// //
// Amber 2 Core Instruction Test //
// //
// This file is part of the Amber project //
// http://www.opencores.org/project,amber //
// //
// Description //
// Generates as dense a stream of writes as possible to check //
// that the memory subsystem can cope with this worst case. //
// //
// 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"
#include "amber_macros.h"
.section .text
.globl main
main:
@ ---------------------
@ Enable the cache
@ ---------------------
@ The instruction space is cached and the data space is not.
@ So when the written data is read back, it comes from
@ main memory and not the dcache.
mov r0, #0x1
mcr 15, 0, r0, cr3, cr0, 0 @ cacheable area
mov r0, #1
mcr 15, 0, r0, cr2, cr0, 0 @ cache enable
mov r14, #3
loop: mov r0, #0x1000000
add r1, r14, #0x1
add r2, r14, #0x2
add r3, r14, #0x3
add r4, r14, #0x4
add r5, r14, #0x5
add r6, r14, #0x6
add r7, r14, #0x7
add r8, r14, #0x8
@ ---------------------
@ write 1024 bytes
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
stm r0!, {r1-r8}
@ Read back and check
mov r0, #0x1000000
mov r13, #320
1: mov r9, r14
2: add r9, r9, #1
ldr r12, [r0], #4
compare r12, r9, __LINE__
add r10, r14, #8
cmp r9, r10
bne 2b
subs r13, r13, #10
bne 1b
subs r14, r14, #1
bne loop
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
Data1: .word Data2
Data2: .word 0xff
/* ========================================================================= */
/* ========================================================================= */
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