sel4-sys 0.0.28

Rust interface to the seL4 kernel
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/*
 * Copyright 2014, General Dynamics C4 Systems
 *
 * This software may be distributed and modified according to the terms of
 * the GNU General Public License version 2. Note that NO WARRANTY is provided.
 * See "LICENSE_GPLv2.txt" for details.
 *
 * @TAG(GD_GPL)
 */

#include <config.h>
#include <stdint.h>
#include <util.h>
#include <machine/io.h>
#include <plat/machine/devices.h>

#define UTHR 0x00 /* UART Transmit Holding Register */
#define ULSR 0x14 /* UART Line Status Register */
#define ULSR_THRE 0x20 /* Transmit Holding Register Empty */

#define UART_REG(x) ((volatile uint32_t *)(UART3_PPTR + (x)))

#if defined(CONFIG_DEBUG_BUILD) || defined(CONFIG_PRINTING)
void
putDebugChar(unsigned char c)
{
    while ((*UART_REG(ULSR) & ULSR_THRE) == 0);

    *UART_REG(UTHR) = c;
}
#endif

#ifdef CONFIG_DEBUG_BUILD
unsigned char
getDebugChar(void)
{
    return 0;
}
#endif