[U-Boot] [RFC PATCH 03/11] SPL: FIT: factor out spl_load_fit_image()
André Przywara
andre.przywara at arm.com
Tue Jan 24 00:07:48 CET 2017
On 23/01/17 08:53, Lokesh Vutla wrote:
Hi Lokesh,
thanks a lot for having a thorough look at it!
>> On Friday 20 January 2017 07:23 AM, Andre Przywara wrote:
>> At the moment we load two images from a FIT image: the actual U-Boot
>> image and the DTB. Both times we have very similar code to deal with
>> alignment requirement the media we load from imposes upon us.
>> Factor out this code into a new function, which we just call twice.
>>
>> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>> ---
>> common/spl/spl_fit.c | 122 +++++++++++++++++++++------------------------------
>> 1 file changed, 51 insertions(+), 71 deletions(-)
>>
>> diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c
>> index 381ed1f..d4149c5 100644
>> --- a/common/spl/spl_fit.c
>> +++ b/common/spl/spl_fit.c
>> @@ -138,19 +138,58 @@ static int get_aligned_image_size(struct spl_load_info *info, int data_size,
>> return (data_size + info->bl_len - 1) / info->bl_len;
>> }
>>
>> +static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
>> + void *fit, ulong base_offset, int node,
>> + struct spl_image_info *image_info)
>> +{
>> + ulong offset;
>> + size_t length;
>> + ulong load, entry;
>> + void *src;
>> + ulong overhead;
>> + int nr_sectors;
>> +
>> + offset = fdt_getprop_u32(fit, node, "data-offset") + base_offset;
>> + length = fdt_getprop_u32(fit, node, "data-size");
>> + load = fdt_getprop_u32(fit, node, "load");
>> + if (load == -1U && image_info)
>> + load = image_info->load_addr;
>
> What if load_addr is not aligned with ARCH_DMA_MINALIGN like in case of
> DT loading (u-boot's load_addr + size cannot be always aligned with
> DMA). I keep getting this error when loading DT: "FAT: Misaligned buffer
> address (808675a0)."
Ah, good point, though I didn't encounter this error.
> Something similar is required to fix it:
> http://pastebin.ubuntu.com/23850970/
Yeah, looks like it. I try to bake this in an upcoming release.
>> + entry = fdt_getprop_u32(fit, node, "entry");
>> +
>> + overhead = get_aligned_image_overhead(info, offset);
>> + nr_sectors = get_aligned_image_size(info, overhead + length, offset);
> ^^^^
> Need not add overhead here as get_aligned_image_size() takes care of
> adding overhead.
Right, I somehow got lost in translation here, probably during some
rebasing/refactoring.
>> +
>> + if (info->read(info, sector + get_aligned_image_offset(info, offset),
>> + nr_sectors, (void*)load) != nr_sectors)
>> + return -EIO;
>> + debug("image: dst=%lx, offset=%lx, size=%lx\n", load, offset,
>> + (unsigned long)length);
>> +
>> + src = (void *)load + overhead;
>> +#ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS
>> + board_fit_image_post_process(&src, &length);
>> +#endif
>> +
>> + memcpy((void*)load, src, length);
>> +
>> + if (image_info) {
>> + image_info->load_addr = load;
>> + image_info->size = length;
>> + image_info->entry_point = entry;
>
> If entry_point is not provided can we default to load_addr?
> Existing U-Boot fit image generation does not provide entry option. So
> this patch alone breaks boot.(I understand that it is fixed in next
> patch but this is breaking git bisectability).
Good point, this is indeed a good idea.
Cheers,
Andre.
> Thanks and regards,
> Lokesh
>
>
>> + }
>> +
>> + return 0;
>> +}
>> +
>> int spl_load_simple_fit(struct spl_image_info *spl_image,
>> struct spl_load_info *info, ulong sector, void *fit)
>> {
>> int sectors;
>> - ulong size, load;
>> + ulong size;
>> unsigned long count;
>> + struct spl_image_info image_info;
>> int node, images;
>> - void *load_ptr;
>> - int fdt_offset, fdt_len;
>> - int data_offset, data_size;
>> int base_offset, align_len = ARCH_DMA_MINALIGN - 1;
>> - int src_sector;
>> - void *dst, *src;
>>
>> /*
>> * Figure out where the external images start. This is the base for the
>> @@ -202,82 +241,23 @@ int spl_load_simple_fit(struct spl_image_info *spl_image,
>> return -1;
>> }
>>
>> - /* Get its information and set up the spl_image structure */
>> - data_offset = fdt_getprop_u32(fit, node, "data-offset");
>> - data_size = fdt_getprop_u32(fit, node, "data-size");
>> - load = fdt_getprop_u32(fit, node, "load");
>> - debug("data_offset=%x, data_size=%x\n", data_offset, data_size);
>> - spl_image->load_addr = load;
>> - spl_image->entry_point = load;
>> + /* Load the image and set up the spl_image structure */
>> + spl_load_fit_image(info, sector, fit, base_offset, node, spl_image);
>> spl_image->os = IH_OS_U_BOOT;
>>
>> - /*
>> - * Work out where to place the image. We read it so that the first
>> - * byte will be at 'load'. This may mean we need to load it starting
>> - * before then, since we can only read whole blocks.
>> - */
>> - data_offset += base_offset;
>> - sectors = get_aligned_image_size(info, data_size, data_offset);
>> - load_ptr = (void *)load;
>> - debug("U-Boot size %x, data %p\n", data_size, load_ptr);
>> - dst = load_ptr;
>> -
>> - /* Read the image */
>> - src_sector = sector + get_aligned_image_offset(info, data_offset);
>> - debug("Aligned image read: dst=%p, src_sector=%x, sectors=%x\n",
>> - dst, src_sector, sectors);
>> - count = info->read(info, src_sector, sectors, dst);
>> - if (count != sectors)
>> - return -EIO;
>> - debug("image: dst=%p, data_offset=%x, size=%x\n", dst, data_offset,
>> - data_size);
>> - src = dst + get_aligned_image_overhead(info, data_offset);
>> -
>> -#ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS
>> - board_fit_image_post_process((void **)&src, (size_t *)&data_size);
>> -#endif
>> -
>> - memcpy(dst, src, data_size);
>> -
>> /* Figure out which device tree the board wants to use */
>> node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP, 0);
>> if (node < 0) {
>> debug("%s: cannot find FDT node\n", __func__);
>> return node;
>> }
>> - fdt_offset = fdt_getprop_u32(fit, node, "data-offset");
>> - fdt_len = fdt_getprop_u32(fit, node, "data-size");
>>
>> /*
>> - * Read the device tree and place it after the image. There may be
>> - * some extra data before it since we can only read entire blocks.
>> - * And also align the destination address to ARCH_DMA_MINALIGN.
>> + * Read the device tree and place it after the image.
>> + * Align the destination address to ARCH_DMA_MINALIGN.
>> */
>> - dst = (void *)((load + data_size + align_len) & ~align_len);
>> - fdt_offset += base_offset;
>> - sectors = get_aligned_image_size(info, fdt_len, fdt_offset);
>> - src_sector = sector + get_aligned_image_offset(info, fdt_offset);
>> - count = info->read(info, src_sector, sectors, dst);
>> - debug("Aligned fdt read: dst %p, src_sector = %x, sectors %x\n",
>> - dst, src_sector, sectors);
>> - if (count != sectors)
>> - return -EIO;
>> -
>> - /*
>> - * Copy the device tree so that it starts immediately after the image.
>> - * After this we will have the U-Boot image and its device tree ready
>> - * for us to start.
>> - */
>> - debug("fdt: dst=%p, data_offset=%x, size=%x\n", dst, fdt_offset,
>> - fdt_len);
>> - src = dst + get_aligned_image_overhead(info, fdt_offset);
>> - dst = load_ptr + data_size;
>> -
>> -#ifdef CONFIG_SPL_FIT_IMAGE_POST_PROCESS
>> - board_fit_image_post_process((void **)&src, (size_t *)&fdt_len);
>> -#endif
>> -
>> - memcpy(dst, src, fdt_len);
>> + image_info.load_addr = spl_image->load_addr + spl_image->size;
>> + spl_load_fit_image(info, sector, fit, base_offset, node, &image_info);
>>
>> return 0;
>> }
>>
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