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bloblist: Support allocating the bloblist

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Typically the bloblist is positioned at a fixed address in memory until
relocation. This is convenient when it is set up in SPL or before
relocation.

But for EFI we want to set it up only when U-Boot proper is running. Add
a way to allocate it using malloc() and update the documentation to cover
this aspect of bloblist.

Note there are no tests of this feature at present, nor any direct testing
of bloblist_init().

This can be added, e.g. by making this option controllable at runtime.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-11-03 21:09:20 -06:00
parent e2f0474b05
commit d5b6e91ba2
4 changed files with 50 additions and 5 deletions
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16
common/bloblist.c
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@@ -7,6 +7,7 @@
#include <common.h>
#include <bloblist.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <spl.h>
#include <asm/global_data.h>
@@ -416,10 +417,21 @@ int bloblist_init(void)
ret = bloblist_check(CONFIG_BLOBLIST_ADDR,
CONFIG_BLOBLIST_SIZE);
if (ret) {
ulong addr;
log(LOGC_BLOBLIST, expected ? LOGL_WARNING : LOGL_DEBUG,
"Existing bloblist not found: creating new bloblist\n");
ret = bloblist_new(CONFIG_BLOBLIST_ADDR, CONFIG_BLOBLIST_SIZE,
0);
if (IS_ENABLED(CONFIG_BLOBLIST_ALLOC)) {
void *ptr = memalign(BLOBLIST_ALIGN,
CONFIG_BLOBLIST_SIZE);
if (!ptr)
return log_msg_ret("alloc", -ENOMEM);
addr = map_to_sysmem(ptr);
} else {
addr = CONFIG_BLOBLIST_ADDR;
}
ret = bloblist_new(addr, CONFIG_BLOBLIST_SIZE, 0);
} else {
log(LOGC_BLOBLIST, LOGL_DEBUG, "Found existing bloblist\n");
}