/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2022 tinylab.org
 * Author: Bin Meng <[email protected]>
 */

#ifndef _RISCV_SEMIHOST_H_
#define _RISCV_SEMIHOST_H_

struct uart_port;

static inline void smh_putc(struct uart_port *port, unsigned char c)
{
    asm volatile("addi    a1, %0, 0\n"
             "addi    a0, zero, 3\n"
             ".balign 16\n"
             ".option push\n"
             ".option norvc\n"
             "slli    zero, zero, 0x1f\n"
             "ebreak\n"
             "srai    zero, zero, 0x7\n"
             ".option pop\n"
             : : "r" (&c) : "a0", "a1", "memory");
}

#endif /* _RISCV_SEMIHOST_H_ */