2015-07-01 21:43:42 +02:00
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/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <errno.h>
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2015-07-17 15:43:55 +02:00
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#include "uart.h"
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2015-07-23 23:17:55 +02:00
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#include "helpers.h"
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2015-07-17 15:43:55 +02:00
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#define CONSOLE_OUTPUT_DEV QUARK_X1000_UART_1
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2015-07-17 15:21:31 +02:00
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#define HEAP_MAX_SIZE 2048
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static char _heap[HEAP_MAX_SIZE];
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static char *prog_break = _heap;
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2015-07-01 21:43:42 +02:00
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int
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_close_r(struct _reent *ptr, int file)
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{
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/* Stubbed function */
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ptr->_errno = ENOTSUP;
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return -1;
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}
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/*---------------------------------------------------------------------------*/
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2015-07-23 23:17:55 +02:00
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void
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_exit(int status)
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{
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halt();
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}
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/*---------------------------------------------------------------------------*/
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int
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_getpid_r(struct _reent *ptr)
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{
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/* Stubbed function */
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ptr->_errno = ENOTSUP;
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return -1;
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}
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/*---------------------------------------------------------------------------*/
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2015-07-01 21:43:42 +02:00
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int
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_isatty_r(struct _reent *ptr, int file)
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{
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/* Stubbed function */
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2015-07-23 23:17:55 +02:00
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ptr->_errno = ENOTSUP;
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2015-07-01 21:43:42 +02:00
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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int
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2015-07-23 23:17:55 +02:00
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_kill_r(struct _reent *ptr, int pid, int signal)
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{
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/* Stubbed function */
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ptr->_errno = ENOTSUP;
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return -1;
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}
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/*---------------------------------------------------------------------------*/
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int
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2015-07-01 21:43:42 +02:00
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_read_r(struct _reent *ptr, int file, char *buf, int len)
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{
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/* Stubbed function */
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ptr->_errno = ENOTSUP;
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2015-07-23 23:17:55 +02:00
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return -1;
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2015-07-01 21:43:42 +02:00
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}
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/*---------------------------------------------------------------------------*/
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int
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_write_r(struct _reent *ptr, int file, const char *buf, int len)
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{
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2015-07-17 15:43:55 +02:00
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int ret;
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int i;
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switch(file) {
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case 0:
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ptr->_errno = EBADF;
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ret = -1;
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break;
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case 1:
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case 2:
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for(i = 0; i < len; i++) {
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/* Since file descriptors 1 and 2 (stdout and stderr) are mapped to a
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* serial console, we should translate the 'newline' escape sequence
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* to 'carriage return' (CR) followed by 'line feed' (LF) ASCII
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* characters.
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*/
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if(buf[i] == '\n') {
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quarkX1000_uart_tx(CONSOLE_OUTPUT_DEV, '\r');
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}
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quarkX1000_uart_tx(CONSOLE_OUTPUT_DEV, buf[i]);
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}
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ret = len;
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break;
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default:
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/* We don't support any filesystem yet. */
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ptr->_errno = ENOTSUP;
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ret = -1;
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break;
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}
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return ret;
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2015-07-01 21:43:42 +02:00
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}
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/*---------------------------------------------------------------------------*/
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int
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_lseek_r(struct _reent *ptr, int file, int p, int dir)
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{
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/* Stubbed function */
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ptr->_errno = ENOTSUP;
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2015-07-23 23:17:55 +02:00
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return -1;
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2015-07-01 21:43:42 +02:00
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}
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/*---------------------------------------------------------------------------*/
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int
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_fstat_r(struct _reent *ptr, int file, struct stat *st)
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{
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2015-07-17 15:43:55 +02:00
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/* We don't support the standard input yet so file descriptor 0 is not
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* supported by this function. Additionally, we don't have support for
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* any filesystem thus file descriptors greater than 2 are not supported
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* as well.
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*
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* We support standard ouput and error (file descriptors 1 and 2) only.
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*/
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if(file == 0 || file > 2) {
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ptr->_errno = ENOTSUP;
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return -1;
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}
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st->st_mode = S_IFCHR;
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return 0;
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2015-07-01 21:43:42 +02:00
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}
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/*---------------------------------------------------------------------------*/
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caddr_t
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_sbrk_r(struct _reent *ptr, int incr)
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{
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2015-07-17 15:21:31 +02:00
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char *prev_prog_break;
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/* If the new program break overruns the maximum heap address, we return
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* "Out of Memory" error to the user.
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*/
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if(prog_break + incr > _heap + HEAP_MAX_SIZE) {
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ptr->_errno = ENOMEM;
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return NULL;
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}
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prev_prog_break = prog_break;
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prog_break += incr;
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return prev_prog_break;
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2015-07-01 21:43:42 +02:00
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}
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