[PATCH v4] FIT: Parse `load` and `entry` addresses.
Christian Mauderer
christian.mauderer at embedded-brains.de
Tue Jul 14 05:15:50 EDT 2020
On 14/07/2020 11:15, Ahmad Fatoum wrote:
> On 7/14/20 11:11 AM, Christian Mauderer wrote:
>> According to the U-Boot documentation for the FIT file format, the load
>> and entry have to be allways defined for a "kernel" or "standalone".
>> But Barebox ignored the parameters. That changes with this patch.
>>
>> For backward compatibility the default address is still used for images
>> without `load` or `entry`.
>>
>> Signed-off-by: Christian Mauderer <christian.mauderer at embedded-brains.de>
>
> Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
>
> Thanks
> Ahmad
Thanks for the review and for your patience.
Best regards
Christian
>
>> ---
>> arch/arm/mach-layerscape/ppa.c | 3 +-
>> common/bootm.c | 7 +++--
>> common/image-fit.c | 50 ++++++++++++++++++++++++++++++++--
>> include/image-fit.h | 3 +-
>> 4 files changed, 56 insertions(+), 7 deletions(-)
>>
>> diff --git a/arch/arm/mach-layerscape/ppa.c b/arch/arm/mach-layerscape/ppa.c
>> index 477e89478..3eb7ab641 100644
>> --- a/arch/arm/mach-layerscape/ppa.c
>> +++ b/arch/arm/mach-layerscape/ppa.c
>> @@ -82,7 +82,8 @@ static int ppa_init(void *ppa, size_t ppa_size, void *sec_firmware_addr)
>> }
>>
>>
>> - ret = fit_open_image(fit, conf, "firmware", &buf, &firmware_size);
>> + ret = fit_open_image(fit, conf, "firmware", &buf, &firmware_size,
>> + NULL, NULL);
>> if (ret) {
>> pr_err("Cannot open firmware image in ppa FIT image: %s\n",
>> strerror(-ret));
>> diff --git a/common/bootm.c b/common/bootm.c
>> index 366f31455..94600cae3 100644
>> --- a/common/bootm.c
>> +++ b/common/bootm.c
>> @@ -222,7 +222,7 @@ int bootm_load_initrd(struct image_data *data, unsigned long load_address)
>> unsigned long initrd_size;
>>
>> ret = fit_open_image(data->os_fit, data->fit_config, "ramdisk",
>> - &initrd, &initrd_size);
>> + &initrd, &initrd_size, NULL, NULL);
>>
>> data->initrd_res = request_sdram_region("initrd",
>> load_address,
>> @@ -348,7 +348,7 @@ void *bootm_get_devicetree(struct image_data *data)
>> unsigned long of_size;
>>
>> ret = fit_open_image(data->os_fit, data->fit_config, "fdt",
>> - &of_tree, &of_size);
>> + &of_tree, &of_size, NULL, NULL);
>> if (ret)
>> return ERR_PTR(ret);
>>
>> @@ -622,7 +622,8 @@ int bootm_boot(struct bootm_data *bootm_data)
>> }
>>
>> ret = fit_open_image(data->os_fit, data->fit_config, "kernel",
>> - &data->fit_kernel, &data->fit_kernel_size);
>> + &data->fit_kernel, &data->fit_kernel_size,
>> + &data->os_address, &data->os_entry);
>> if (ret)
>> goto err_out;
>> }
>> diff --git a/common/image-fit.c b/common/image-fit.c
>> index 2681d62a9..6dd541634 100644
>> --- a/common/image-fit.c
>> +++ b/common/image-fit.c
>> @@ -517,12 +517,30 @@ int fit_has_image(struct fit_handle *handle, void *configuration,
>> return 1;
>> }
>>
>> +static int fit_get_address(struct device_node *image, const char *property,
>> + unsigned long *addr)
>> +{
>> + const __be32 *cell;
>> + int len = 0;
>> +
>> + cell = of_get_property(image, property, &len);
>> + if (!cell)
>> + return -EINVAL;
>> + if (len > sizeof(*addr))
>> + return -ENOTSUPP;
>> +
>> + *addr = (unsigned long)of_read_number(cell, len / sizeof(*cell));
>> + return 0;
>> +}
>> +
>> /**
>> * fit_open_image - Open an image in a FIT image
>> * @handle: The FIT image handle
>> * @name: The name of the image to open
>> * @outdata: The returned image
>> * @outsize: Size of the returned image
>> + * @load: The load address given by the image
>> + * @entry: The entry address given by the image
>> *
>> * Open an image in a FIT image. The returned image is freed during fit_close().
>> * @configuration holds the cookie returned from fit_open_configuration() if
>> @@ -532,11 +550,16 @@ int fit_has_image(struct fit_handle *handle, void *configuration,
>> * then only the hash is checked (because opening the configuration already
>> * checks the RSA signature of all involved nodes).
>> *
>> + * The load address and entry point of the image description in the FIT will be
>> + * parsed if they exist and if the @load and @entry parameters are not NULL.
>> + * Otherwise @load and @entry won't be changed.
>> + *
>> * Return: 0 for success, negative error code otherwise
>> */
>> int fit_open_image(struct fit_handle *handle, void *configuration,
>> const char *name, const void **outdata,
>> - unsigned long *outsize)
>> + unsigned long *outsize, unsigned long *load,
>> + unsigned long *entry)
>> {
>> struct device_node *image;
>> const char *unit, *type = NULL, *desc= "(no description)";
>> @@ -559,7 +582,30 @@ int fit_open_image(struct fit_handle *handle, void *configuration,
>> return -ENOENT;
>>
>> of_property_read_string(image, "description", &desc);
>> - pr_info("image '%s': '%s'\n", unit, desc);
>> + pr_info("image '%s': '%s'", unit, desc);
>> +
>> + if (load) {
>> + ret = fit_get_address(image, "load", load);
>> + if (ret < 0)
>> + pr_info("; Couldn't get load address in %s. Use default.\n",
>> + image->full_name);
>> + else
>> + pr_cont("; load: 0x%lx", *load);
>> + }
>> +
>> + if (load && entry) {
>> + ret = fit_get_address(image, "entry", entry);
>> + if (ret < 0) {
>> + pr_info("Couldn't get entry point in %s. Use default.\n",
>> + image->full_name);
>> + } else {
>> + /* Barebox uses an entry relative to load but the FIT
>> + * images assume an absolute entry. */
>> + *entry -= *load;
>> + pr_cont("; entry (relative to load): 0x%lx", *entry);
>> + }
>> + }
>> + pr_cont("\n");
>>
>> of_property_read_string(image, "type", &type);
>> if (!type) {
>> diff --git a/include/image-fit.h b/include/image-fit.h
>> index 27c9e8351..038732d0d 100644
>> --- a/include/image-fit.h
>> +++ b/include/image-fit.h
>> @@ -31,7 +31,8 @@ int fit_has_image(struct fit_handle *handle, void *configuration,
>> const char *name);
>> int fit_open_image(struct fit_handle *handle, void *configuration,
>> const char *name, const void **outdata,
>> - unsigned long *outsize);
>> + unsigned long *outsize, unsigned long *load,
>> + unsigned long *entry);
>>
>> void fit_close(struct fit_handle *handle);
>>
>>
>
--
--------------------------------------------
embedded brains GmbH
Herr Christian Mauderer
Dornierstr. 4
D-82178 Puchheim
Germany
email: christian.mauderer at embedded-brains.de
Phone: +49-89-18 94 741 - 18
Fax: +49-89-18 94 741 - 08
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