LXR uboot/common/spl/spl

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2022 Sean Anderson <sean.anderson@seco.com>
   4 */
   5
   6#include <common.h>
   7#include <image.h>
   8#include <log.h>
   9#include <semihosting.h>
  10#include <spl.h>
  11
  12static int smh_read_full(long fd, void *memp, size_t len)
  13{
  14        long read;
  15
  16        read = smh_read(fd, memp, len);
  17        if (read < 0)
  18                return read;
  19        if (read != len)
  20                return -EIO;
  21        return 0;
  22}
  23
  24static int spl_smh_load_image(struct spl_image_info *spl_image,
  25                              struct spl_boot_device *bootdev)
  26{
  27        const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;
  28        int ret;
  29        long fd, len;
  30        struct image_header *header =
  31                spl_get_load_buffer(-sizeof(*header), sizeof(*header));
  32
  33        fd = smh_open(filename, MODE_READ | MODE_BINARY);
  34        if (fd < 0) {
  35                log_debug("could not open %s: %ld\n", filename, fd);
  36                return fd;
  37        }
  38
  39        ret = smh_flen(fd);
  40        if (ret < 0) {
  41                log_debug("could not get length of image: %d\n", ret);
  42                goto out;
  43        }
  44        len = ret;
  45
  46        ret = smh_read_full(fd, header, sizeof(struct image_header));
  47        if (ret) {
  48                log_debug("could not read image header: %d\n", ret);
  49                goto out;
  50        }
  51
  52        ret = spl_parse_image_header(spl_image, bootdev, header);
  53        if (ret) {
  54                log_debug("failed to parse image header: %d\n", ret);
  55                goto out;
  56        }
  57
  58        ret = smh_seek(fd, 0);
  59        if (ret) {
  60                log_debug("could not seek to start of image: %d\n", ret);
  61                goto out;
  62        }
  63
  64        ret = smh_read_full(fd, (void *)spl_image->load_addr, len);
  65        if (ret)
  66                log_debug("could not read %s: %d\n", filename, ret);
  67out:
  68        smh_close(fd);
  69        return ret;
  70}
  71SPL_LOAD_IMAGE_METHOD("SEMIHOSTING", 0, BOOT_DEVICE_SMH, spl_smh_load_image);
  72