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Add burst test
Add test for writes to same address. Apparently consecutive 64-bit writes to the same address can turn into burst writes. From: aolofsson#37 Andreas: > Remembered that we have a long forgotten mode in the epiphany chip elink > (not impemented in the fpga elink) that creates bursts when you write > doubles to the same address. (F**K!) > So the writes were likely coming in as bursts. > Looks like the mailbox works fine when you write in "int"s (I tested it on > the board with consecutive) > (see "mailbox_test" in elink/sw0) Signed-off-by: Ola Jeppsson <[email protected]>
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‎elink/sw/burst-test/README.md

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# Test burst writes
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https://github.com/parallella/oh/issues/37
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> Remembered that we have a long forgotten mode in the epiphany chip elink
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> (not impemented in the fpga elink) that creates bursts when you write
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> doubles to the same address. (F**K!)
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> So the writes were likely coming in as bursts.
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> Looks like the mailbox works fine when you write in "int"s (I tested it on
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> the board with consecutive)
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> (see "mailbox_test" in elink/sw0)
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‎elink/sw/burst-test/build.sh

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#!/bin/bash
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set -e
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ESDK=${EPIPHANY_HOME}
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ELIBS="-L ${ESDK}/tools/host/lib"
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EINCS="-I ${ESDK}/tools/host/include"
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ELDF=${ESDK}/bsps/current/internal.ldf
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# Create the binaries directory
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mkdir -p bin/
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if [ -z "${CROSS_COMPILE+xxx}" ]; then
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case $(uname -p) in
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arm*)
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# Use native arm compiler (no cross prefix)
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CROSS_COMPILE=
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;;
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*)
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# Use cross compiler
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CROSS_COMPILE="arm-linux-gnueabihf-"
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;;
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esac
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fi
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# Build HOST side application
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${CROSS_COMPILE}gcc src/main.c -g -o bin/main.elf ${EINCS} ${ELIBS} -le-hal -le-loader -lpthread
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# Build DEVICE side program
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OPT=3
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e-gcc -g -T ${ELDF} -O${OPT} src/emain.c src/etest.S -o bin/emain.elf -le-lib
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‎elink/sw/burst-test/run.sh

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#!/bin/bash
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set -e
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SCRIPT=$(readlink -f "$0")
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EXEPATH=$(dirname "$SCRIPT")
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cd $EXEPATH/bin
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./main.elf
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‎elink/sw/burst-test/src/common.h

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#pragma once
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#define STATUS_ADDR 0x6000
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#define NEXPECTED 8
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/* External memory */
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#define DRAM_RESULT_OFFSET 0x01100000
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#define DRAM_RESULT_ADDR 0x8f100000
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/* On-chip SRAM */
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#define ERAM_RESULT_OFFSET 0x00001000
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#define ERAM_RESULT_ADDR 0x80901000
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#define EXPECTED_0 0x12345678
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#define EXPECTED_1 0xffffffff
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#define EXPECTED_2 0xf0f0f0f0
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#define EXPECTED_3 0xffff0000
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#define EXPECTED_4 0xff00ff00
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#define EXPECTED_5 0xaaaaaaaa
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#define EXPECTED_6 0x55555555
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#define EXPECTED_7 0xa55aa55a
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‎elink/sw/burst-test/src/emain.c

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#include <e-lib.h>
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#include <stdint.h>
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#include "common.h"
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extern void test_dram();
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extern void test_eram();
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int main()
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{
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volatile uint32_t *status = (uint32_t *) STATUS_ADDR;
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test_dram();
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test_eram();
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/* Tell host we're done */
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*status = 1;
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}

‎elink/sw/burst-test/src/etest.S

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#include "common.h"
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/* ANSI concatenation macros. */
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#define CONCAT1(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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#define STRINGIFY2(a, b) STRINGIFY(a##b)
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#define STRINGIFY(a) #a
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/* Use the right prefix for global labels. */
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#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
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#define FUNC(X) .type SYM(X),@function
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FUNC(test_dram)
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.global SYM(test_dram)
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.align 3
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SYM(test_dram):
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mov r20, %low(EXPECTED_0)
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movt r20, %high(EXPECTED_0)
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mov r21, %low(EXPECTED_1)
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movt r21, %high(EXPECTED_1)
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mov r22, %low(EXPECTED_2)
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movt r22, %high(EXPECTED_2)
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mov r23, %low(EXPECTED_3)
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movt r23, %high(EXPECTED_3)
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mov r24, %low(EXPECTED_4)
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movt r24, %high(EXPECTED_4)
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mov r25, %low(EXPECTED_5)
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movt r25, %high(EXPECTED_5)
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mov r26, %low(EXPECTED_6)
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movt r26, %high(EXPECTED_6)
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mov r27, %low(EXPECTED_7)
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movt r27, %high(EXPECTED_7)
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mov r30, %low(DRAM_RESULT_ADDR)
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movt r30, %high(DRAM_RESULT_ADDR)
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# 32-bit writes
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# 1 writes
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str r20,[r30],+1
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# 2 writes
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str r20,[r30]
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str r21,[r30],+1
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# 3 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30],+1
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# 4 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30],+1
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# 5 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30],+1
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# 6 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30],+1
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# 7 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30]
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str r26,[r30],+1
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# 8 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30]
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str r26,[r30]
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str r27,[r30],+1
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;; repeat w/ 64-bit writes
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# 1 writes
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strd r20,[r30],+1
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# 2 writes
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strd r20,[r30]
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strd r22,[r30],+1
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# 3 writes
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strd r20,[r30]
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strd r22,[r30]
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strd r24,[r30],+1
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# 4 writes
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strd r20,[r30]
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strd r22,[r30]
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strd r24,[r30]
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strd r26,[r30],+1
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rts
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.size SYM(test_dram), .-SYM(test_dram)
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FUNC(test_eram)
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.global SYM(test_eram)
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.align 3
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SYM(test_eram):
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mov r20, %low(EXPECTED_0)
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movt r20, %high(EXPECTED_0)
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mov r21, %low(EXPECTED_1)
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movt r21, %high(EXPECTED_1)
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mov r22, %low(EXPECTED_2)
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movt r22, %high(EXPECTED_2)
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mov r23, %low(EXPECTED_3)
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movt r23, %high(EXPECTED_3)
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mov r24, %low(EXPECTED_4)
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movt r24, %high(EXPECTED_4)
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mov r25, %low(EXPECTED_5)
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movt r25, %high(EXPECTED_5)
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mov r26, %low(EXPECTED_6)
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movt r26, %high(EXPECTED_6)
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mov r27, %low(EXPECTED_7)
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movt r27, %high(EXPECTED_7)
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mov r30, %low(ERAM_RESULT_ADDR)
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movt r30, %high(ERAM_RESULT_ADDR)
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# 32-bit writes
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# 1 writes
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str r20,[r30],+1
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# 2 writes
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str r20,[r30]
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str r21,[r30],+1
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# 3 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30],+1
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# 4 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30],+1
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# 5 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30],+1
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# 6 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30],+1
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# 7 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30]
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str r26,[r30],+1
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# 8 writes
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str r20,[r30]
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str r21,[r30]
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str r22,[r30]
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str r23,[r30]
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str r24,[r30]
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str r25,[r30]
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str r26,[r30]
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str r27,[r30],+1
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;; repeat w/ 64-bit writes
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# 1 writes
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strd r20,[r30],+1
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# 2 writes
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strd r20,[r30]
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strd r22,[r30],+1
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# 3 writes
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strd r20,[r30]
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strd r22,[r30]
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strd r24,[r30],+1
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# 4 writes
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strd r20,[r30]
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strd r22,[r30]
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strd r24,[r30]
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strd r26,[r30],+1
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rts
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.size SYM(test_eram), .-SYM(test_eram)

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