diff options
Diffstat (limited to 'bsp/env/freedom-e300-arty/init.c')
-rw-r--r-- | bsp/env/freedom-e300-arty/init.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/bsp/env/freedom-e300-arty/init.c b/bsp/env/freedom-e300-arty/init.c deleted file mode 100644 index a6f4b39..0000000 --- a/bsp/env/freedom-e300-arty/init.c +++ /dev/null @@ -1,87 +0,0 @@ -//See LICENSE for license details. -#include <stdint.h> -#include <stdio.h> -#include <unistd.h> - -#include "platform.h" -#include "encoding.h" - -extern int main(int argc, char** argv); -extern void trap_entry(); - -static unsigned long get_cpu_freq() -{ - return 65000000; -} - -unsigned long get_timer_freq() -{ - return get_cpu_freq(); -} - -uint64_t get_timer_value() -{ -#if __riscv_xlen == 32 - while (1) { - uint32_t hi = read_csr(mcycleh); - uint32_t lo = read_csr(mcycle); - if (hi == read_csr(mcycleh)) - return ((uint64_t)hi << 32) | lo; - } -#else - return read_csr(mcycle); -#endif -} - -static void uart_init(size_t baud_rate) -{ - GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK; - GPIO_REG(GPIO_IOF_EN) |= IOF0_UART0_MASK; - UART0_REG(UART_REG_DIV) = get_cpu_freq() / baud_rate - 1; - UART0_REG(UART_REG_TXCTRL) |= UART_TXEN; -} - - -#ifdef USE_PLIC -extern void handle_m_ext_interrupt(); -#endif - -#ifdef USE_M_TIME -extern void handle_m_time_interrupt(); -#endif - -uintptr_t handle_trap(uintptr_t mcause, uintptr_t epc) -{ - if (0){ -#ifdef USE_PLIC - // External Machine-Level interrupt from PLIC - } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_EXT)) { - handle_m_ext_interrupt(); -#endif -#ifdef USE_M_TIME - // External Machine-Level interrupt from PLIC - } else if ((mcause & MCAUSE_INT) && ((mcause & MCAUSE_CAUSE) == IRQ_M_TIMER)){ - handle_m_time_interrupt(); -#endif - } - else { - write(1, "Unhandled Trap:\n", 16); - _exit(1 + mcause); - } - return epc; -} - -void _init() -{ - #ifndef NO_INIT - uart_init(115200); - - printf("core freq at %d Hz\n", get_cpu_freq()); - - write_csr(mtvec, &trap_entry); - #endif -} - -void _fini() -{ -} |