boa-risc-v

// Copyright © 2024, Julian Scheffers, see LICENSE for more information

#include "power.h"
#include "print.h"
#include "printf_impl.h"
#include "rng.h"
#include "uart.h"

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>

void isr() {
    long mcause;
    asm("csrr %0, mcause" : "=r"(mcause));
    if (mcause < 0) {
        // Interrupt.
        mcause &= 31;
        // Unhandled interrupt.
        print("Interrupt ");
        putd(mcause, 2);
        print("\n");
        halt();

    } else {
        // Trap.
        print("Trap ");
        putd(mcause, 2);
        print("\n");
        halt();
    }
}

void try(int rc) {
    print("Return value: ");
    if (rc < 0) {
        rc = -rc;
        putc('-');
    }
    putd(rc, 10);
    print("\n");
}

void main() {
    // Set up interrupts.
    while (!UART0.status.rx_hasdat) continue;
    try(printf("%02x\n", 0xa00));
    try(printf("%-8x,\n", 0xb00));
    try(printf("%024x\n", 0xc00));
    try(printf("%p\n", &UART0));
    try(printf("%d\n", 1234));
    try(printf("%-10d,\n", 1234));
    try(printf("%10d,\n", 1234));
    try(printf("%-10d,\n", -1234));
    try(printf("%10d,\n", -1234));
    try(printf("%d,%d\n", 10, 10));
    try(printf("%s\n", "This string"));
    softreset();
}