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bl_common: add image_size() 

Fixes ARM-software/tf-issues#42

Some callers of load_image() may need to get the size of the image
before/after loading it.

Change-Id: I8dc067b69fc711433651a560ba5a8c3519445857
Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
This commit is contained in:
Ryan Harkin 2014-02-04 11:43:57 +00:00 committed by Dan Handley
parent 48e2ca7967
commit ee9ad7856c
2 changed files with 45 additions and 0 deletions
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44
common/bl_common.c
View File

@ -251,6 +251,50 @@ static void dump_load_info(unsigned long image_load_addr,
#endif
}
/* Generic function to return the size of an image */
unsigned long image_size(const char *image_name)
{
io_dev_handle dev_handle;
io_handle image_handle;
void *image_spec;
size_t image_size = 0;
int io_result = IO_FAIL;
assert(image_name != NULL);
/* Obtain a reference to the image by querying the platform layer */
io_result = plat_get_image_source(image_name, &dev_handle, &image_spec);
if (io_result != IO_SUCCESS) {
WARN("Failed to obtain reference to image '%s' (%i)\n",
image_name, io_result);
return 0;
}
/* Attempt to access the image */
io_result = io_open(dev_handle, image_spec, &image_handle);
if (io_result != IO_SUCCESS) {
WARN("Failed to access image '%s' (%i)\n",
image_name, io_result);
return 0;
}
/* Find the size of the image */
io_result = io_size(image_handle, &image_size);
if ((io_result != IO_SUCCESS) || (image_size == 0)) {
WARN("Failed to determine the size of the image '%s' file (%i)\n",
image_name, io_result);
}
io_result = io_close(image_handle);
/* Ignore improbable/unrecoverable error in 'close' */
/* TODO: Consider maintaining open device connection from this
* bootloader stage
*/
io_result = io_dev_close(dev_handle);
/* Ignore improbable/unrecoverable error in 'dev_close' */
return image_size;
}
/*******************************************************************************
* Generic function to load an image into the trusted RAM,
* given a name, extents of free memory & whether the image should be loaded at

1
include/bl_common.h
View File

@ -133,6 +133,7 @@ extern void init_bl2_mem_layout(meminfo *,
extern void init_bl31_mem_layout(const meminfo *,
meminfo *,
unsigned int) __attribute__((weak));
extern unsigned long image_size(const char *);
extern unsigned long load_image(meminfo *, const char *, unsigned int, unsigned long);
extern void __dead2 run_image(unsigned long entrypoint,
unsigned long spsr,