bloblist: add support for CONFIG_BLOBLIST_PASSAGE
When the configuration option CONFIG_BLOBLIST_PASSAGE is selected, the
bloblist present in the incoming standard passage is utilised in-place.
There is no need to specify the size of the bloblist as the system
automatically detects it using the header information.
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/common/Kconfig b/common/Kconfig
index f948987..7b2db46 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -1066,6 +1066,12 @@
specify a fixed address on systems where this is unknown or can
change at runtime.
+config BLOBLIST_PASSAGE
+ bool "Use bloblist in-place"
+ help
+ Use a bloblist in the incoming standard passage. The size is detected
+ automatically so CONFIG_BLOBLIST_SIZE can be 0.
+
endchoice
config BLOBLIST_ADDR
@@ -1080,6 +1086,7 @@
config BLOBLIST_SIZE
hex "Size of bloblist"
+ default 0x0 if BLOBLIST_PASSAGE
default 0x400
help
Sets the size of the bloblist in bytes. This must include all
@@ -1090,7 +1097,6 @@
config BLOBLIST_SIZE_RELOC
hex "Size of bloblist after relocation"
default BLOBLIST_SIZE if BLOBLIST_FIXED || BLOBLIST_ALLOC
- default 0x0 if BLOBLIST_PASSAGE
default 0x20000 if (ARM && EFI_LOADER && GENERATE_ACPI_TABLE)
help
Sets the size of the bloblist in bytes after relocation. Since U-Boot
diff --git a/common/bloblist.c b/common/bloblist.c
index 110bb9d..1fcd387 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -475,6 +475,9 @@
{
struct bloblist_hdr *hdr;
+ if (!to_size)
+ return 0;
+
if (to_size < gd->bloblist->total_size)
return -ENOSPC;
@@ -505,13 +508,6 @@
* at a fixed address.
*/
bool from_addr = fixed && !xpl_is_first_phase();
- /*
- * If U-Boot is in the first phase that an arch custom routine should
- * install the bloblist passed from previous loader to this fixed
- * address.
- */
- bool from_boot_arg = fixed && xpl_is_first_phase();
-
if (xpl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
from_addr = false;
if (fixed)
@@ -519,7 +515,13 @@
CONFIG_BLOBLIST_ADDR);
size = CONFIG_BLOBLIST_SIZE;
- if (from_boot_arg)
+
+ /*
+ * If the current boot stage is the first phase of U-Boot, then an
+ * architecture-specific routine should be used to handle the bloblist
+ * passed from the previous boot loader
+ */
+ if (xpl_is_first_phase() && !IS_ENABLED(CONFIG_BLOBLIST_ALLOC))
ret = xferlist_from_boot_arg(addr, size);
else if (from_addr)
ret = bloblist_check(addr, size);