Merge pull request #155 from mikey/exceptions
Add decrementer, illegal and system call exceptionspull/157/head
Anton Blanchard
4 years ago
committed by
GitHub
commit
d3291dbdf0
@ -0,0 +1,132 @@
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#include <unistd.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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/*
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* Core UART functions to implement for a port
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*/
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static uint64_t potato_uart_base;
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#define PROC_FREQ 50000000
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#define UART_FREQ 115200
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#define UART_BASE 0xc0002000
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#define POTATO_CONSOLE_TX 0x00
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#define POTATO_CONSOLE_RX 0x08
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#define POTATO_CONSOLE_STATUS 0x10
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#define POTATO_CONSOLE_STATUS_RX_EMPTY 0x01
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#define POTATO_CONSOLE_STATUS_TX_EMPTY 0x02
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#define POTATO_CONSOLE_STATUS_RX_FULL 0x04
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#define POTATO_CONSOLE_STATUS_TX_FULL 0x08
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#define POTATO_CONSOLE_CLOCK_DIV 0x18
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#define POTATO_CONSOLE_IRQ_EN 0x20
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static uint64_t potato_uart_reg_read(int offset)
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{
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uint64_t addr;
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uint64_t val;
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addr = potato_uart_base + offset;
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val = *(volatile uint64_t *)addr;
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return val;
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}
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static void potato_uart_reg_write(int offset, uint64_t val)
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{
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uint64_t addr;
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addr = potato_uart_base + offset;
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*(volatile uint64_t *)addr = val;
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}
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static int potato_uart_rx_empty(void)
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{
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uint64_t val;
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val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);
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if (val & POTATO_CONSOLE_STATUS_RX_EMPTY)
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return 1;
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return 0;
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}
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static int potato_uart_tx_full(void)
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{
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uint64_t val;
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val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);
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if (val & POTATO_CONSOLE_STATUS_TX_FULL)
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return 1;
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return 0;
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}
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static char potato_uart_read(void)
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{
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uint64_t val;
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val = potato_uart_reg_read(POTATO_CONSOLE_RX);
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return (char)(val & 0x000000ff);
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}
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static void potato_uart_write(char c)
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{
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uint64_t val;
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val = c;
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potato_uart_reg_write(POTATO_CONSOLE_TX, val);
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}
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static unsigned long potato_uart_divisor(unsigned long proc_freq, unsigned long uart_freq)
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{
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return proc_freq / (uart_freq * 16) - 1;
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}
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void potato_uart_init(void)
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{
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potato_uart_base = UART_BASE;
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potato_uart_reg_write(POTATO_CONSOLE_CLOCK_DIV, potato_uart_divisor(PROC_FREQ, UART_FREQ));
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}
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int getchar(void)
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{
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while (potato_uart_rx_empty())
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/* Do nothing */ ;
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return potato_uart_read();
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}
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void putchar(unsigned char c)
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{
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while (potato_uart_tx_full())
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/* Do Nothing */;
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potato_uart_write(c);
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}
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void putstr(const char *str, unsigned long len)
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{
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for (unsigned long i = 0; i < len; i++) {
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putchar(str[i]);
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}
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}
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size_t strlen(const char *s)
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{
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size_t len = 0;
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while (*s++)
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len++;
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return len;
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}
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@ -0,0 +1,5 @@
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void potato_uart_init(void);
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int getchar(void);
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void putchar(unsigned char c);
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void putstr(const char *str, unsigned long len);
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size_t strlen(const char *s);
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@ -0,0 +1,38 @@
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#!/bin/bash
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# Runs a test and checks the console output against known good output
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if [ $# -ne 1 ]; then
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echo "Usage: run_test.sh <test>"
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exit 1
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fi
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TEST=$1
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TMPDIR=$(mktemp -d)
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function finish {
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rm -rf "$TMPDIR"
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}
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trap finish EXIT
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MICROWATT_DIR=$PWD
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cd $TMPDIR
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cp ${MICROWATT_DIR}/tests/${TEST}.bin main_ram.bin
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${MICROWATT_DIR}/core_tb > /dev/null 2> test1.out || true
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grep -v "Failed to bind debug socket" test1.out > test.out
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cp ${MICROWATT_DIR}/tests/${TEST}.console_out exp.out
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cp test.out /tmp
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cp exp.out /tmp
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diff -q test.out exp.out && echo "$TEST PASS" && exit 0
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echo "$TEST FAIL ********"
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exit 1
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@ -0,0 +1,28 @@
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ARCH = $(shell uname -m)
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ifneq ("$(ARCH)", "ppc64")
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ifneq ("$(ARCH)", "ppc64le")
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CROSS_COMPILE = powerpc64le-linux-
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endif
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endif
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CC = $(CROSS_COMPILE)gcc
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LD = $(CROSS_COMPILE)ld
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OBJCOPY = $(CROSS_COMPILE)objcopy
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CFLAGS = -Os -g -Wall -std=c99 -msoft-float -mno-string -mno-multiple -mno-vsx -mno-altivec -mlittle-endian -fno-stack-protector -mstrict-align -ffreestanding -fdata-sections -ffunction-sections -I ../../hello_world
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ASFLAGS = $(CFLAGS)
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LDFLAGS = -T powerpc.lds
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all: $(TEST).hex
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$(TEST).elf: $(TEST).o head.o ../../hello_world/console.o
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$(LD) $(LDFLAGS) -o $(TEST).elf $(TEST).o head.o ../../hello_world/console.o
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$(TEST).bin: $(TEST).elf
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$(OBJCOPY) -O binary $(TEST).elf $(TEST).bin
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$(TEST).hex: $(TEST).bin
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../../scripts/bin2hex.py $(TEST).bin > $(TEST).hex
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clean:
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@rm -f *.o $(TEST).elf $(TEST).bin $(TEST).hex
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@ -0,0 +1,3 @@
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TEST=decrementer
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include ../Makefile.test
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@ -0,0 +1,54 @@
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#include <unistd.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "console.h"
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#define TEST "Test "
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#define PASS "PASS\r\n"
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#define FAIL "FAIL\r\n"
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extern int dec_test_1(void);
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extern int dec_test_2(void);
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extern int dec_test_3(void);
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// i < 100
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void print_test_number(int i)
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{
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putstr(TEST, strlen(TEST));
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putchar(48 + i/10);
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putchar(48 + i%10);
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putstr(":", 1);
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}
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int main(void)
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{
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int fail = 0;
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potato_uart_init();
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print_test_number(1);
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if (dec_test_1() != 0) {
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fail = 1;
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putstr(FAIL, strlen(FAIL));
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} else
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putstr(PASS, strlen(PASS));
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print_test_number(2);
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if (dec_test_2() != 0) {
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fail = 1;
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putstr(FAIL, strlen(FAIL));
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} else
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putstr(PASS, strlen(PASS));
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print_test_number(3);
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if (dec_test_3() != 0) {
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fail = 1;
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putstr(FAIL, strlen(FAIL));
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} else
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putstr(PASS, strlen(PASS));
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return fail;
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}
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@ -0,0 +1,161 @@
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/* Copyright 2013-2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define STACK_TOP 0x2000
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/* Load an immediate 64-bit value into a register */
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#define LOAD_IMM64(r, e) \
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lis r,(e)@highest; \
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ori r,r,(e)@higher; \
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rldicr r,r, 32, 31; \
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oris r,r, (e)@h; \
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ori r,r, (e)@l;
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.section ".head","ax"
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/*
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* Microwatt currently enters in LE mode at 0x0, so we don't need to
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* do any endian fix ups
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*/
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. = 0
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.global _start
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_start:
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b boot_entry
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.global boot_entry
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boot_entry:
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/* setup stack */
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LOAD_IMM64(%r1, STACK_TOP - 0x100)
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LOAD_IMM64(%r12, main)
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mtctr %r12
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bctrl
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attn // terminate on exit
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b .
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/* test to see if end up at the instruction after the rfid */
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.global dec_test_1
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dec_test_1:
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li %r3, 0
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mtdec %r3
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LOAD_IMM64(%r3, dec_test_1_rfid)
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mtsrr0 %r3
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LOAD_IMM64(%r3, 0x9000000000008003)
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mtsrr1 %r3
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li %r3, 1 // preload with a fail code
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rfid
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dec_test_1_rfid:
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b 1f // should be skipped
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b 1f // should be skipped
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li %r3, 0
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blr
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1:
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li %r3, 1
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blr
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/* test to see if end up at the instruction after the rfid */
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.global dec_test_2
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dec_test_2:
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li %r3, 0x100
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mtdec %r3
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LOAD_IMM64(%r3, dec_test_2_rfid)
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mtsrr0 %r3
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LOAD_IMM64(%r3, 0x9000000000008003)
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mtsrr1 %r3
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li %r3, 1 // preload with a fail code
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rfid
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dec_test_2_rfid:
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b . // should wait here and then be skipped
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b 1f // should be skipped
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li %r3, 0
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blr
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1:
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li %r3, 1
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blr
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/* test mtmsrd */
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.global dec_test_3
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dec_test_3:
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LOAD_IMM64(%r3, 0x9000000000000003)
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mtmsrd %r3 // EE off
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li %r3, 0x0 // shouldn't fire right away
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mtdec %r3
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b 2f
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nop
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b 1f // shouln't get here
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2:
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LOAD_IMM64(%r3, 0x9000000000008003)
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mtmsrd %r3 // EE on
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b 1f // shouln't get here
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b 1f // shouln't get here
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li %r3, 0
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blr
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1:
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li %r3, 1
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blr
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#define EXCEPTION(nr) \
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.= nr ;\
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b .
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/* More exception stubs */
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EXCEPTION(0x300)
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EXCEPTION(0x380)
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EXCEPTION(0x400)
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EXCEPTION(0x480)
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EXCEPTION(0x500)
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EXCEPTION(0x600)
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EXCEPTION(0x700)
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EXCEPTION(0x800)
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. = 0x900
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mtsprg0 %r3
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LOAD_IMM64(%r3, 0x000000000ffffff)
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mtdec %r3
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mfsrr0 %r3
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addi %r3, %r3, 8 // skip 2 instructions
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mtsrr0 %r3
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mfsprg0 %r3
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rfid
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EXCEPTION(0x980)
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EXCEPTION(0xa00)
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EXCEPTION(0xb00)
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EXCEPTION(0xc00)
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EXCEPTION(0xd00)
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EXCEPTION(0xe00)
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EXCEPTION(0xe20)
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EXCEPTION(0xe40)
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EXCEPTION(0xe60)
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EXCEPTION(0xe80)
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EXCEPTION(0xf00)
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EXCEPTION(0xf20)
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EXCEPTION(0xf40)
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EXCEPTION(0xf60)
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EXCEPTION(0xf80)
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#if 0
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EXCEPTION(0x1000)
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EXCEPTION(0x1100)
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EXCEPTION(0x1200)
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EXCEPTION(0x1300)
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EXCEPTION(0x1400)
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EXCEPTION(0x1500)
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EXCEPTION(0x1600)
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#endif
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@ -0,0 +1,13 @@
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SECTIONS
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{
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_start = .;
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. = 0;
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.head : {
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KEEP(*(.head))
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}
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. = 0x1000;
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.text : { *(.text) }
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. = 0x2000;
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.data : { *(.data) }
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.bss : { *(.bss) }
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}
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@ -0,0 +1,3 @@
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TEST=illegal
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include ../Makefile.test
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@ -0,0 +1,125 @@
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/* Copyright 2013-2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
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*
|
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* http://www.apache.org/licenses/LICENSE-2.0
|
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*
|
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* Unless required by applicable law or agreed to in writing, software
|
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* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
* implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
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|
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#define STACK_TOP 0x2000
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/* Load an immediate 64-bit value into a register */
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#define LOAD_IMM64(r, e) \
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lis r,(e)@highest; \
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ori r,r,(e)@higher; \
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rldicr r,r, 32, 31; \
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oris r,r, (e)@h; \
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ori r,r, (e)@l;
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.section ".head","ax"
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/*
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* Microwatt currently enters in LE mode at 0x0, so we don't need to
|
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* do any endian fix ups
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*/
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. = 0
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.global _start
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_start:
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b boot_entry
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.global boot_entry
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boot_entry:
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/* setup stack */
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LOAD_IMM64(%r1, STACK_TOP - 0x100)
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LOAD_IMM64(%r12, main)
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mtctr %r12
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bctrl
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attn // terminate on exit
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b .
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/* test illegal */
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.global ill_test_1
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ill_test_1:
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li %r3, 1 // preload a failure
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.long 0x0 // illegal will be skipped + 1 more
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b 1f // skipped
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li %r3, 1 // preload a failure
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.long 0x0 // illegal will be skipped + 1 more
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b 1f // skipped
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li %r3, 0
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blr
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1:
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li %r3, 1
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blr
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#define EXCEPTION(nr) \
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.= nr ;\
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b .
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/* More exception stubs */
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EXCEPTION(0x300)
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EXCEPTION(0x380)
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EXCEPTION(0x400)
|
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EXCEPTION(0x480)
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EXCEPTION(0x500)
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EXCEPTION(0x600)
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. = 0x700
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mtsprg0 %r3
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mtsprg1 %r4
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// test for bit 44 being set for ILL
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mfsrr1 %r3
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li %r4, 1
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sldi %r4, %r4, (63-44)
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and. %r4, %r4, %r3
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li %r4, 8 // PASS so skip 2 instructions
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bne 1f
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li %r4, 4 // FAIL so only skip 1 instruction. Return will catch
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1:
|
||||
mfsrr0 %r3
|
||||
add %r3, %r3, %r4 // skip some instructions
|
||||
mtsrr0 %r3
|
||||
|
||||
mfsprg0 %r3
|
||||
mfsprg1 %r4
|
||||
rfid
|
||||
|
||||
EXCEPTION(0x800)
|
||||
EXCEPTION(0x900)
|
||||
EXCEPTION(0x980)
|
||||
EXCEPTION(0xa00)
|
||||
EXCEPTION(0xb00)
|
||||
EXCEPTION(0xc00)
|
||||
EXCEPTION(0xd00)
|
||||
EXCEPTION(0xe00)
|
||||
EXCEPTION(0xe20)
|
||||
EXCEPTION(0xe40)
|
||||
EXCEPTION(0xe60)
|
||||
EXCEPTION(0xe80)
|
||||
EXCEPTION(0xf00)
|
||||
EXCEPTION(0xf20)
|
||||
EXCEPTION(0xf40)
|
||||
EXCEPTION(0xf60)
|
||||
EXCEPTION(0xf80)
|
||||
#if 0
|
||||
EXCEPTION(0x1000)
|
||||
EXCEPTION(0x1100)
|
||||
EXCEPTION(0x1200)
|
||||
EXCEPTION(0x1300)
|
||||
EXCEPTION(0x1400)
|
||||
EXCEPTION(0x1500)
|
||||
EXCEPTION(0x1600)
|
||||
#endif
|
||||
|
||||
|
||||
@ -0,0 +1,37 @@
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
#include "console.h"
|
||||
|
||||
#define TEST "Test "
|
||||
#define PASS "PASS\r\n"
|
||||
#define FAIL "FAIL\r\n"
|
||||
|
||||
extern int ill_test_1(void);
|
||||
|
||||
// i < 100
|
||||
void print_test_number(int i)
|
||||
{
|
||||
putstr(TEST, strlen(TEST));
|
||||
putchar(48 + i/10);
|
||||
putchar(48 + i%10);
|
||||
putstr(":", 1);
|
||||
}
|
||||
|
||||
int main(void)
|
||||
{
|
||||
int fail = 0;
|
||||
|
||||
potato_uart_init();
|
||||
|
||||
print_test_number(1);
|
||||
if (ill_test_1() != 0) {
|
||||
fail = 1;
|
||||
putstr(FAIL, strlen(FAIL));
|
||||
} else
|
||||
putstr(PASS, strlen(PASS));
|
||||
|
||||
return fail;
|
||||
}
|
||||
@ -0,0 +1,13 @@
|
||||
SECTIONS
|
||||
{
|
||||
_start = .;
|
||||
. = 0;
|
||||
.head : {
|
||||
KEEP(*(.head))
|
||||
}
|
||||
. = 0x1000;
|
||||
.text : { *(.text) }
|
||||
. = 0x2000;
|
||||
.data : { *(.data) }
|
||||
.bss : { *(.bss) }
|
||||
}
|
||||
@ -0,0 +1,3 @@
|
||||
TEST=sc
|
||||
|
||||
include ../Makefile.test
|
||||
@ -0,0 +1,111 @@
|
||||
/* Copyright 2013-2014 IBM Corp.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
* implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
#define STACK_TOP 0x2000
|
||||
|
||||
/* Load an immediate 64-bit value into a register */
|
||||
#define LOAD_IMM64(r, e) \
|
||||
lis r,(e)@highest; \
|
||||
ori r,r,(e)@higher; \
|
||||
rldicr r,r, 32, 31; \
|
||||
oris r,r, (e)@h; \
|
||||
ori r,r, (e)@l;
|
||||
|
||||
.section ".head","ax"
|
||||
|
||||
/*
|
||||
* Microwatt currently enters in LE mode at 0x0, so we don't need to
|
||||
* do any endian fix ups
|
||||
*/
|
||||
. = 0
|
||||
.global _start
|
||||
_start:
|
||||
b boot_entry
|
||||
|
||||
.global boot_entry
|
||||
boot_entry:
|
||||
/* setup stack */
|
||||
LOAD_IMM64(%r1, STACK_TOP - 0x100)
|
||||
LOAD_IMM64(%r12, main)
|
||||
mtctr %r12
|
||||
bctrl
|
||||
attn // terminate on exit
|
||||
b .
|
||||
|
||||
/* test sc */
|
||||
.global sc_test_1
|
||||
sc_test_1:
|
||||
li %r3, 1 // preload a failure
|
||||
sc
|
||||
b 1f // skipped
|
||||
b 1f // skipped
|
||||
b 2f // return here is good!
|
||||
b 1f // shouldn't hit here
|
||||
2:
|
||||
li %r3, 0
|
||||
blr
|
||||
1:
|
||||
li %r3, 1
|
||||
blr
|
||||
|
||||
#define EXCEPTION(nr) \
|
||||
.= nr ;\
|
||||
b .
|
||||
|
||||
/* More exception stubs */
|
||||
EXCEPTION(0x300)
|
||||
EXCEPTION(0x380)
|
||||
EXCEPTION(0x400)
|
||||
EXCEPTION(0x480)
|
||||
EXCEPTION(0x500)
|
||||
EXCEPTION(0x600)
|
||||
EXCEPTION(0x700)
|
||||
EXCEPTION(0x800)
|
||||
EXCEPTION(0x900)
|
||||
EXCEPTION(0x980)
|
||||
EXCEPTION(0xa00)
|
||||
EXCEPTION(0xb00)
|
||||
|
||||
. = 0xc00
|
||||
mtsprg0 %r3
|
||||
mfsrr0 %r3
|
||||
addi %r3, %r3, 8 // skip 2 instructions
|
||||
mtsrr0 %r3
|
||||
mfsprg0 %r3
|
||||
rfid
|
||||
|
||||
EXCEPTION(0xd00)
|
||||
EXCEPTION(0xe00)
|
||||
EXCEPTION(0xe20)
|
||||
EXCEPTION(0xe40)
|
||||
EXCEPTION(0xe60)
|
||||
EXCEPTION(0xe80)
|
||||
EXCEPTION(0xf00)
|
||||
EXCEPTION(0xf20)
|
||||
EXCEPTION(0xf40)
|
||||
EXCEPTION(0xf60)
|
||||
EXCEPTION(0xf80)
|
||||
#if 0
|
||||
EXCEPTION(0x1000)
|
||||
EXCEPTION(0x1100)
|
||||
EXCEPTION(0x1200)
|
||||
EXCEPTION(0x1300)
|
||||
EXCEPTION(0x1400)
|
||||
EXCEPTION(0x1500)
|
||||
EXCEPTION(0x1600)
|
||||
#endif
|
||||
|
||||
|
||||
@ -0,0 +1,13 @@
|
||||
SECTIONS
|
||||
{
|
||||
_start = .;
|
||||
. = 0;
|
||||
.head : {
|
||||
KEEP(*(.head))
|
||||
}
|
||||
. = 0x1000;
|
||||
.text : { *(.text) }
|
||||
. = 0x2000;
|
||||
.data : { *(.data) }
|
||||
.bss : { *(.bss) }
|
||||
}
|
||||
@ -0,0 +1,37 @@
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
#include "console.h"
|
||||
|
||||
#define TEST "Test "
|
||||
#define PASS "PASS\r\n"
|
||||
#define FAIL "FAIL\r\n"
|
||||
|
||||
extern int sc_test_1(void);
|
||||
|
||||
// i < 100
|
||||
void print_test_number(int i)
|
||||
{
|
||||
putstr(TEST, strlen(TEST));
|
||||
putchar(48 + i/10);
|
||||
putchar(48 + i%10);
|
||||
putstr(":", 1);
|
||||
}
|
||||
|
||||
int main(void)
|
||||
{
|
||||
int fail = 0;
|
||||
|
||||
potato_uart_init();
|
||||
|
||||
print_test_number(1);
|
||||
if (sc_test_1() != 0) {
|
||||
fail = 1;
|
||||
putstr(FAIL, strlen(FAIL));
|
||||
} else
|
||||
putstr(PASS, strlen(PASS));
|
||||
|
||||
return fail;
|
||||
}
|
||||
Binary file not shown.
@ -0,0 +1,3 @@
|
||||
Test 01:PASS
|
||||
Test 02:PASS
|
||||
Test 03:PASS
|
||||
Binary file not shown.
@ -0,0 +1 @@
|
||||
Test 01:PASS
|
||||
Binary file not shown.
@ -0,0 +1 @@
|
||||
Test 01:PASS
|
||||
@ -0,0 +1,14 @@
|
||||
#!/bin/bash
|
||||
#
|
||||
# Script to update console related tests from source
|
||||
#
|
||||
|
||||
for i in sc illegal decrementer ; do
|
||||
cd $i
|
||||
make
|
||||
cd -
|
||||
cp $i/$i.bin test_$i.bin
|
||||
ln -s test_$i.bin main_ram.bin
|
||||
../core_tb > /dev/null 2> test_$i.console_out
|
||||
rm main_ram.bin
|
||||
done
|
||||
Loading…
Reference in New Issue