remove unused timer interrupt handler

raven/Makefile

@@ -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

raven/src/hello_raven.cpp

@@ -5,10 +5,7 @@
 
 #include <cstdio>
 #include <cstdint>
-
+#include <array>
-#include "hifive1_io.h"
-
-
 
 #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
+	// UART init section TODO: clarify how to get the functions from init.c?
-    PRCI_use_hfxosc(1); // is equivalent to
+	GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
-    qspi1::sckdiv_reg() = 8;
+	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;

raven/src/hello_raven.h

@@ -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_ */

raven/src/hifive1_io.cpp

@@ -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;
-

raven/src/hifive1_io.h

@@ -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_ */