[U-Boot-Users] [PATCH 3/6] [new uImage] Add gen_get_image() routine

Kumar Gala
2008-02-20T19:19:39Z

> +/**
> + * gen_get_image - get image from special storage (if necessary)
> + * @img_addr: image start address
> + *
> + * gen_get_image() checks if provided image start adddress is located
> + * in a dataflash storage. If so, image is moved to a system RAM
> memory.
> + *
> + * returns:
> + * image start address after possible relocation from special
> storage
> + */
> +ulong gen_get_image (ulong img_addr)
> +{
> + ulong ram_addr, h_size, d_size;
> +
> + h_size = image_get_header_size ();
> +#if defined(CONFIG_FIT)
> + if (sizeof(struct fdt_header) > h_size)
> + h_size = sizeof(struct fdt_header);
> +#endif
> +
> +#ifdef CONFIG_HAS_DATAFLASH
> + if (addr_dataflash (img_addr)){
> + ram_addr = CFG_LOAD_ADDR;
> + debug (" Reading image header from dataflash address "
> + "%08lx to RAM address %08lx\n", img_addr, ram_addr);
> + read_dataflash (img_addr, h_size, (char *)ram_addr);
> + } else
> +#endif
> + ram_addr = img_addr;

can we not early out at this point?

> +
> + switch (gen_image_get_format ((void *)ram_addr)) {
> + case IMAGE_FORMAT_LEGACY:
> + d_size = image_get_data_size ((image_header_t *)ram_addr);
> + debug (" Legacy format image found at 0x%08lx, size 0x%08lx\n",
> + ram_addr, d_size);
> + break;
> +#if defined(CONFIG_FIT)
> + case IMAGE_FORMAT_FIT:
> + d_size = fdt_totalsize((void *)ram_addr) - h_size;
> + debug (" FIT/FDT format image found at 0x%08lx, size 0x%08lx\n",
> + ram_addr, d_size);
> +
> + break;
> +#endif
> + default:
> + printf (" No valid image found at 0x%08lx\n", img_addr);
> + return ram_addr;
> + }
> +
> +#ifdef CONFIG_HAS_DATAFLASH
> + if (addr_dataflash (img_addr)) {
> + debug (" Reading image remaining data from dataflash address "
> + "%08lx to RAM address %08lx\n", img_addr + h_size,
> + ram_addr + h_size);
> +
> + read_dataflash (img_addr + h_size, d_size,
> + (char *)(ram_addr + h_size));
> + }
> +#endif
> +
> + return ram_addr;
> +}