149 lines
4.3 KiB
C
149 lines
4.3 KiB
C
/****************************************************************************
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* boards/z80/ez80/z20x/src/sd_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/mount.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <hex2bin.h>
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#include <assert.h>
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#include <errno.h>
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#include <arch/irq.h>
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#include "z20x.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MMCSD_BLOCKDEV "/dev/mmcsd0"
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#define MMCSD_MOUNTPT "/mnt/sdcard"
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#define MMCSD_HEXFILE "/mnt/sdcard/nuttx.hex"
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#define SRAM_ENTRY ((sram_entry_t)PROGSTART)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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typedef CODE void (*sram_entry_t)(void);
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sd_main
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*
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* Description:
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* sd_main is a tiny program that runs in FLASH. sd_main will
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* configure SRAM and load an Intel HEX file into SRAM,
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* and either start that program or wait for you to break in with the
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* debugger.
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*
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****************************************************************************/
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int sd_main(int argc, char *argv[])
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{
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int fd;
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int ret;
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/* SRAM was already initialized at boot time, so we are ready to load the
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* Intel HEX stream into SRAM.
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*/
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#ifndef CONFIG_BOARD_LATE_INITIALIZE
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/* Perform board-level initialization. This should include registering
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* the MMC/SD block driver at /dev/mmcsd0.
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*/
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DEBUGVERIFY(ez80_bringup());
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#endif
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syslog(LOG_INFO, "Loading %s\n", MMCSD_HEXFILE);
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/* Mount the MMC/SD block drivers at /mnt/sdcard */
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ret = mount(MMCSD_BLOCKDEV, MMCSD_MOUNTPT, "vfat", 0, NULL);
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if (ret < 0)
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{
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int errcode = errno;
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syslog(LOG_ERR, "ERROR: Failed to mount filesystem at %s: %d\n",
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MMCSD_MOUNTPT, errcode);
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goto halt;
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}
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/* Open the file /mnt/sdcard/nuttx.hex */
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fd = open(MMCSD_HEXFILE, O_RDONLY);
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if (fd < 0)
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{
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int errcode = errno;
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syslog(LOG_ERR, "ERROR: Failed to mount filesystem at %s: %d\n",
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MMCSD_MOUNTPT, errcode);
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goto halt_with_mount;
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}
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/* Load the HEX image into memory */
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ret = hex2mem(fd, (uint32_t)PROGSTART, (uint32_t)PROGEND, 0);
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if (ret < 0)
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{
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/* We failed to load the HEX image */
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syslog(LOG_ERR, "ERROR: Intel HEX file load failed: %d\n", ret);
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goto halt_with_hexfile;
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}
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close(fd);
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umount(MMCSD_MOUNTPT);
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/* The reset vector should now be present at the beginning of SRAM.
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* This assumes that the image was loaded at 0x040000 and that the reset
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* vector is the first thing in memory.
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*/
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syslog(LOG_INFO, "Starting at %p\n", SRAM_ENTRY);
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/* Interrupts must be disabled through the following. */
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up_irq_save();
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/* Then jump into SRAM via the reset vector at 0x040000 */
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SRAM_ENTRY();
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goto halt;
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halt_with_hexfile:
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close(fd);
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halt_with_mount:
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umount(MMCSD_MOUNTPT);
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halt:
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for (; ; );
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return 0; /* Will not get here */
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}
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