On some SoCs, the SPL needs to be located right in the middle of the GPT
partition entries.
One way to work around that is to create partition entries for a smaller
number of partitions to accomodate with where the SPL will be. Create a
Kconfig option to allow to do that.
Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
---
disk/Kconfig | 13 +++++++++++++
include/part_efi.h | 2 +-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/disk/Kconfig b/disk/Kconfig
index 939656212065..f82beef6e689 100644
--- a/disk/Kconfig
+++ b/disk/Kconfig
@@ -78,6 +78,19 @@ config EFI_PARTITION
common when EFI is the bootloader. Note 2TB partition limit;
see disk/part_efi.c
+config EFI_PARTITION_ENTRIES_NUMBERS
+ int "Number of the EFI partition entries"
+ depends on EFI_PARTITION
+ default 128
+ help
+ Specify the number of partition entries in the GPT. This is
+ meant to allow less than the standard specifies for devices
+ that might need to place their first-stage bootloader in the
+ middle of a regular GPT.
+
+ If unsure, leave at 128 entries, which is the standard
+ number.
+
config EFI_PARTITION_ENTRIES_OFF
int "Offset (in bytes) of the EFI partition entries"
depends on EFI_PARTITION
diff --git a/include/part_efi.h b/include/part_efi.h
index 31e6bc6e140f..4c8f6cc473c8 100644
--- a/include/part_efi.h
+++ b/include/part_efi.h
@@ -27,7 +27,7 @@
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
#define GPT_HEADER_REVISION_V1 0x00010000
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
-#define GPT_ENTRY_NUMBERS 128
+#define GPT_ENTRY_NUMBERS CONFIG_EFI_PARTITION_ENTRIES_NUMBERS
#define GPT_ENTRY_SIZE 128
#define PARTITION_SYSTEM_GUID \
--
2.14.3
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