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60 lines
1.2 KiB
60 lines
1.2 KiB
#include "hal.h"
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#include <stddef.h>
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/* Murax UART */
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typedef struct {
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volatile uint32_t DATA;
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volatile uint32_t STATUS;
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volatile uint32_t CLOCK_DIVIDER;
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volatile uint32_t FRAME_CONFIG;
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} Uart_Reg;
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enum UartParity { NONE = 0, EVEN = 1, ODD = 2 };
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enum UartStop { ONE = 0, TWO = 1 };
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typedef struct {
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uint32_t dataLength;
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enum UartParity parity;
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enum UartStop stop;
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uint32_t clockDivider;
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} Uart_Config;
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static uint32_t uart_writeAvailability(Uart_Reg* reg)
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{
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return (reg->STATUS >> 16) & 0xFF;
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}
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static void uart_write(Uart_Reg* reg, uint32_t data)
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{
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while (uart_writeAvailability(reg) == 0)
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;
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reg->DATA = data;
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}
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#define UART ((Uart_Reg*)(0xF0010000))
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void hal_send(const uint8_t* in, const size_t len) {
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for (size_t i = 0; i < len; i++) {
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uart_write(UART, in[i]);
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}
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}
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void hal_send_str(const char* in)
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{
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const char* cur = in;
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while(*cur) {
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uart_write(UART, *cur);
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cur += 1;
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}
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}
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__attribute__((naked)) uint64_t hal_get_time(void)
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{
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#define LE "\n\t"
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asm volatile (LE"csrr a1, mcycleh"
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LE"csrr a0, mcycle"
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LE"csrr a2, mcycleh"
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LE"bne a1, a2, hal_get_time"
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LE"ret");
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}
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