spl: Add a size check for TPL

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@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/Makefile b/Makefile
index a96c6ce..3000d30 100644 (file)
--- 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
@@ -1806,6 +1812,7 @@ 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 86d7edf..c661809 100644 (file)
--- 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