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spl: fit: allocate a temporary buffer to load the overlays

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If the node describing an overlay does not specify a load address, it will
be loaded at the address previously used.
Fixing it by allocating a temporary buffer that will be used as a
default load address. By default, the size of the buffer is 64kB which
should be plenty for most use cases.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jean-Jacques Hiblot
2019-10-22 16:39:13 +02:00
committed by Tom Rini
parent 99329be2c5
commit ea376ebc9b
2 changed files with 38 additions and 5 deletions
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34
common/spl/spl_fit.c
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@@ -9,11 +9,16 @@
#include <fpga.h>
#include <gzip.h>
#include <image.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <spl.h>
#include <linux/libfdt.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
#define CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ (64 * 1024)
#endif
#ifndef CONFIG_SYS_BOOTM_LEN
#define CONFIG_SYS_BOOTM_LEN (64 << 20)
#endif
@@ -314,33 +319,52 @@ static int spl_fit_append_fdt(struct spl_image_info *spl_image,
spl_image->fdt_addr = (void *)image_info.load_addr;
#if !CONFIG_IS_ENABLED(FIT_IMAGE_TINY)
if (CONFIG_IS_ENABLED(LOAD_FIT_APPLY_OVERLAY)) {
void *tmpbuffer = NULL;
for (; ; index++) {
node = spl_fit_get_image_node(fit, images, FIT_FDT_PROP,
index);
if (node < 0) {
debug("%s: No additional FDT node\n", __func__);
return 0;
break;
}
if (!tmpbuffer) {
/*
* allocate memory to store the DT overlay
* before it is applied. It may not be used
* depending on how the overlay is stored, so
* don't fail yet if the allocation failed.
*/
tmpbuffer = malloc(CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ);
if (!tmpbuffer)
debug("%s: unable to allocate space for overlays\n",
__func__);
}
image_info.load_addr = (ulong)tmpbuffer;
ret = spl_load_fit_image(info, sector, fit, base_offset,
node, &image_info);
if (ret < 0)
return ret;
break;
/* Make room in FDT for changes from the overlay */
ret = fdt_increase_size(spl_image->fdt_addr,
image_info.size);
if (ret < 0)
return ret;
break;
ret = fdt_overlay_apply_verbose(spl_image->fdt_addr,
(void *)image_info.load_addr);
if (ret)
return ret;
break;
debug("%s: DT overlay %s applied\n", __func__,
fit_get_name(fit, node, NULL));
}
if (tmpbuffer)
free(tmpbuffer);
if (ret)
return ret;
}
/* Try to make space, so we can inject details on the loadables */
ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);