spm/common/sp_debug.c

/*
 * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <drivers/arm/pl011.h>
#include <drivers/console.h>
#include <ffa_helpers.h>
#include <ffa_svc.h>
#include <sp_debug.h>
#include <spm_helpers.h>

static int (*putc_impl)(int);

static int putc_hypcall(int c)
{
	hvc_args args = {
		.fid = FFA_CONSOLE_LOG_SMC32,
		.arg1 = 1,
		.arg2 = c
	};

	(void)tftf_hvc(&args);
	return c;
}
static int putc_ffacall(int c)
{
	struct ffa_value args = {
		.fid = FFA_CONSOLE_LOG_SMC32,
		.arg1 = 1,
		.arg2 = c
	};

	ffa_service_call(&args);

	return c;
}

static int putc_uart(int c)
{
	console_pl011_putc(c);

	return c;
}

void set_putc_impl(enum stdout_route route)
{
	switch (route) {

	case FFA_HVC_CALL_AS_STDOUT:
		putc_impl = putc_hypcall;
		return;
	case FFA_SVC_SMC_CALL_AS_STDOUT:
		putc_impl = putc_ffacall;
		return;
	case PL011_AS_STDOUT:
	default:
		break;
	}

	putc_impl = putc_uart;
}

int console_putc(int c)
{
	if (!putc_impl) {
		return -1;
	}

	return putc_impl(c);
}