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remove unused timer interrupt handler

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This commit is contained in:
Stanislaw Kaushanski 2020-09-16 15:12:21 +02:00
parent 9157a42042
commit 9e9b644e29
6 changed files with 9 additions and 80 deletions
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2
raven/Makefile
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@ -3,7 +3,7 @@ TARGET = hello_raven
C_SRCS = $(wildcard src/*.c) $(BSP_BASE)/drivers/fe300prci/fe300prci_driver.c $(BSP_BASE)/drivers/plic/plic_driver.c
CXX_SRCS = $(wildcard src/*.cpp)
HEADERS = $(wildcard src/*.h)
CFLAGS = -g -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME -DNO_INIT -I./src
CFLAGS = -g -fno-builtin-printf -DUSE_PLIC -I./src
CXXFLAGS = -fno-use-cxa-atexit
LDFLAGS = -Wl,--wrap=printf
LDFLAGS += -g -lstdc++ -fno-use-cxa-atexit -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=medany

BIN
raven/hello_raven
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44
raven/src/hello_raven.cpp
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@ -5,10 +5,7 @@
#include <cstdio>
#include <cstdint>
#include "hifive1_io.h"
#include <array>
#define IOF_ENABLE_TERMINAL (0x30000)
@ -34,21 +31,6 @@ extern "C" void handle_m_ext_interrupt() {
exit(1 + (uintptr_t) int_num);
PLIC_complete_interrupt(&g_plic, int_num);
}
/*! \brief mtime interval interrupt
*
*/
extern "C" void handle_m_time_interrupt(){
clear_csr(mie, MIP_MTIP);
// Reset the timer for 3s in the future.
// This also clears the existing timer interrupt.
volatile uint64_t * mtime = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
uint64_t now = *mtime;
uint64_t then = now + RTC_FREQ;
*mtimecmp = then;
// Re-enable the timer interrupt.
set_csr(mie, MIP_MTIP);
}
/*! \brief dummy interrupt handler
*
*/
@ -83,9 +65,10 @@ static void msi_interrupt_handler(){
*
*/
void platform_init(){
// configure clocks
PRCI_use_hfxosc(1); // is equivalent to
qspi1::sckdiv_reg() = 8;
// UART init section TODO: clarify how to get the functions from init.c?
GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
GPIO_REG(GPIO_IOF_EN) |= IOF0_UART0_MASK;
UART0_REG(UART_REG_TXCTRL) |= UART_TXEN;
F_CPU=PRCI_measure_mcycle_freq(20, RTC_FREQ);
printf("core freq at %d Hz\n", F_CPU);
@ -98,18 +81,10 @@ void platform_init(){
clear_csr(mie, MIP_MTIP);
for (auto& h:g_ext_interrupt_handlers) h=no_interrupt_handler;
configure_irq(1, msi_interrupt_handler);
// Set the machine timer to go off in 1 second.
volatile uint64_t * mtime = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
uint64_t now = *mtime;
uint64_t then = now + RTC_FREQ;
*mtimecmp = then;
// Enable the Machine-External bit in MIE
set_csr(mie, MIP_MEIP);
// Enable the Machine-Timer bit in MIE
set_csr(mie, MIP_MTIP);
// Enable interrupts in general.
set_csr(mstatus, MSTATUS_MIE);
// Enable the Machine-External bit in MIE
set_csr(mie, MIP_MEIP);
}
/*! \brief main function
@ -121,15 +96,12 @@ int main() {
int * plic_b_pending = (int *)(0xA0000000+PLIC_PENDING_OFFSET);
int * local_sync_bit = (int *)(local_mem_base + 10);
int * target_sync_bit = (int *)(target_mem_base + 10);
volatile int * target_sync_bit = (int *)(target_mem_base + 10);
int hartid = read_csr(mhartid);
*local_sync_bit = 0;
GPIO_REG(GPIO_IOF_EN) |= IOF_ENABLE_TERMINAL; // enable GPIO connection to the terminal
platform_init();
// Enable the Machine-External bit in MIE
set_csr(mie, MIP_MEIP);
if (hartid == 0) {
int val_a = 5;

1
raven/src/hello_raven.h
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@ -2,6 +2,5 @@
#define HELLO_RAVEN_H_
extern "C" void handle_m_ext_interrupt();
extern "C" void handle_m_time_interrupt();
#endif /* HELLO_RAVEN_H_ */

16
raven/src/hifive1_io.cpp
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@ -1,16 +0,0 @@
/*
* peripherals.c
*
* Created on: 10.09.2018
* Author: eyck
*/
#include "hifive1_io.h"
template<> volatile bool qspi0::spi_active=false;
template<> volatile bool qspi1::spi_active=false;
template<> volatile bool qspi2::spi_active=false;
template<> volatile bool pwm0::pwm_active=false;
template<> volatile bool pwm1::pwm_active=false;
template<> volatile bool pwm2::pwm_active=false;

26
raven/src/hifive1_io.h
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@ -1,26 +0,0 @@
/*
* peripherals.h
*
* Created on: 29.07.2018
* Author: eyck
*/
#ifndef HIFIVE1_IO_H_
#define HIFIVE1_IO_H_
#include "io/gpio.h"
#include "io/spi.h"
#include "io/pwm.h"
#include "io/uart.h"
using gpio0=gpio_regs<0x10012000>;
using uart0=uart_regs<0x10013000>;
using uart1=uart_regs<0x10023000>;
using qspi0=spi_regs<0x10014000>;
using qspi1=spi_regs<0x10024000>;
using qspi2=spi_regs<0x10034000>;
using pwm0 =pwm_regs<0x10015000>;
using pwm1 =pwm_regs<0x10025000>;
using pwm2 =pwm_regs<0x10035000>;
#endif /* HIFIVE1_IO_H_ */