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csantifort |
/*****************************************************************
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// //
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// Amber 2 Core Instruction Test //
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// //
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// This file is part of the Amber project //
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// http://www.opencores.org/project,amber //
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// //
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// Description //
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// Tests instruction and data flow. //
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// Specifically tests that a stm writing to cached memory //
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// also writes all data through to main memory. //
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// //
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// Author(s): //
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// - Conor Santifort, csantifort.amber@gmail.com //
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// //
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//////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2010 Authors and OPENCORES.ORG //
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// //
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// This source file may be used and distributed without //
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// restriction provided that this copyright statement is not //
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// removed from the file and that any derivative work contains //
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// the original copyright notice and the associated disclaimer. //
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// //
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// This source file is free software; you can redistribute it //
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// and/or modify it under the terms of the GNU Lesser General //
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// Public License as published by the Free Software Foundation; //
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// either version 2.1 of the License, or (at your option) any //
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// later version. //
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// //
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// This source is distributed in the hope that it will be //
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// useful, but WITHOUT ANY WARRANTY; without even the implied //
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
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// PURPOSE. See the GNU Lesser General Public License for more //
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// details. //
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// //
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// You should have received a copy of the GNU Lesser General //
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// Public License along with this source; if not, download it //
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// from http://www.opencores.org/lgpl.shtml //
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// //
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*****************************************************************/
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#include "amber_registers.h"
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.section .text
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.globl main
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main:
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@ ---------------------
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@ Enable the cache
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@ ---------------------
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mvn r0, #0
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mcr 15, 0, r0, cr3, cr0, 0 @ cacheable area
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mov r0, #1
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mcr 15, 0, r0, cr2, cr0, 0 @ cache enable
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mov r13, #0x1000
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orr r13, r13, #0x08
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ldr r0, =Data1
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ldm r0, {r1-r5}
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stm r13, {r1-r5}
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@ load the data values back to put them into the data cache
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ldm r13, {r6-r10}
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ldr r0, =Data2
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ldm r0, {r1-r5}
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@ second stm will be to cached memory
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stm r13, {r1-r5}
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csantifort |
@ load it back from the cache to check that
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@ it was written to the cache correctly
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ldm r13, {r6-r10}
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cmp r1, r6
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cmpeq r2, r7
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cmpeq r3, r8
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cmpeq r4, r9
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cmpeq r5, r10
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movne r10, #100
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bne testfail
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@ Clear the cache and read back the data from main memory
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@ Write any value to cp15 reg1 to flush the cache
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mcr 15, 0, r0, cr1, cr0, 0
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ldm r13, {r6-r10}
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cmp r1, r6
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cmpeq r2, r7
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cmpeq r3, r8
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cmpeq r4, r9
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cmpeq r5, r10
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movne r10, #200
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bne testfail
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b testpass
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testfail:
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ldr r11, AdrTestStatus
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str r10, [r11]
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b testfail
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testpass:
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ldr r11, AdrTestStatus
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mov r10, #17
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str r10, [r11]
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b testpass
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/* Write 17 to this address to generate a Test Passed message */
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AdrTestStatus: .word ADR_AMBER_TEST_STATUS
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Data1: .word 0x3
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.word 0x4
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.word 0x5
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.word 0x6
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.word 0x7
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Data2: .word 0x13
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.word 0x14
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.word 0x15
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.word 0x16
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.word 0x17
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/* ========================================================================= */
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/* ========================================================================= */
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