[U-Boot] [PATCH v3 019/108] spl: Add a size check for TPL

[Simon Glass]

We have the ability to enforce a maximum size for SPL but not yet for TPL.
Add a new option for this.

Document the size check macro while we are here.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v3: None
Changes in v2: None

 Makefile           | 7 +++++++
 common/spl/Kconfig | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/Makefile b/Makefile
index cbacf1cfe2c..3a29b5a90f9 100644
--- a/Makefile
+++ b/Makefile
@@ -806,6 +806,12 @@ else
 SPL_SIZE_CHECK =
 endif
 
+ifneq ($(CONFIG_TPL_SIZE_LIMIT),0)
+TPL_SIZE_CHECK = @$(call size_check,$@,$(CONFIG_TPL_SIZE_LIMIT))
+else
+TPL_SIZE_CHECK =
+endif
+
 # Statically apply RELA-style relocations (currently arm64 only)
 # This is useful for arm64 where static relocation needs to be performed on
 # the raw binary, but certain simulators only accept an ELF file (but don't
@@ -1795,6 +1801,7 @@ spl/boot.bin: spl/u-boot-spl
 tpl/u-boot-tpl.bin: tools prepare \
 		$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb)
 	$(Q)$(MAKE) obj=tpl -f $(srctree)/scripts/Makefile.spl all
+	$(TPL_SIZE_CHECK)
 
 TAG_SUBDIRS := $(patsubst %,$(srctree)/%,$(u-boot-dirs) include)
 
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 86d7edfee1b..c661809923a 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1232,6 +1232,14 @@ config TPL
 
 if TPL
 
+config TPL_SIZE_LIMIT
+	hex "Maximum size of TPL image"
+	depends on TPL
+	default 0
+	help
+	  Specifies the maximum length of the U-Boot TPL image.
+	  If this value is zero, it is ignored.
+
 config TPL_HANDOFF
 	bool "Pass hand-off information from TPL to SPL and U-Boot proper"
 	depends on HANDOFF && TPL_BLOBLIST
-- 
2.23.0.866.gb869b98d4c-goog