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csantifort |
/*****************************************************************
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// //
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// Amber 2 Core Cache 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 that the cache can write to and read back multiple //
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// times from 2k words in sequence in memory - the size of //
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// the cache. //
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// //
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// 256 lines x 4 words x 1 way = 1024 words //
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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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mov r0, #0xffffffff
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mcr p15, 0, r0, c3, c0, 0 @ cacheable area
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mov r0, #1
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mcr p15, 0, r0, c2, c0, 0 @ cache enable
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nop
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nop
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@ ---------------------
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@ Write to 2k locations
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@ ---------------------
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ldr r2, AdrTestBase
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mov r3, #0
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write_loop:
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str r3, [r2], #4
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add r3, r3, #1
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cmp r3, #1024
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bne write_loop
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@ ---------------------
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@ Read back - caches the reads
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@ ---------------------
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ldr r2, AdrTestBase
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mov r3, #0
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mov r0, #0
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read1_loop:
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ldr r1, [r2], #4
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add r0, r0, r1
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add r3, r3, #1
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cmp r3, #1024
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bne read1_loop
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ldr r4, MagicNumber1024
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cmp r0, r4
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movne r10, #10
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bne testfail
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@ ---------------------
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@ Read back a second time and check the values
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@ These reads will all be from the cache
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@ ---------------------
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ldr r2, AdrTestBase
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mov r3, #0
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mov r0, #0
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read2_loop:
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ldr r1, [r2], #4
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add r0, r0, r1
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add r3, r3, #1
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cmp r3, #1024
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bne read2_loop
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ldr r4, MagicNumber1024
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cmp r0, r4
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movne r10, #10
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bne testfail
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b testpass
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@ ------------------------------------------
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@ ------------------------------------------
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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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AdrTestBase : .word 0x20000
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/* sum of numbers 0 to 2047 inclusive */
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MagicNumber1024 : .word 523776
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MagicNumber2048 : .word 2096128
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/* ========================================================================= */
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/* ========================================================================= */
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