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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2022 tinylab.org
* Author: Bin Meng <bmeng@tinylab.org>
*/
#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_ */