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| author | Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> | 2019-05-24 22:07:04 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-06-07 11:03:39 -0400 |
| commit | 2577015dc5c48e7892dea8731a27530543606673 (patch) | |
| tree | fbc3cff0721a1be36cb343b841ad7374e33606fb /common | |
| parent | dfe252b11e23e9aa54e87aadc8d8ac5c1ab56861 (diff) | |
| download | u-boot-2577015dc5c48e7892dea8731a27530543606673.zip u-boot-2577015dc5c48e7892dea8731a27530543606673.tar.gz u-boot-2577015dc5c48e7892dea8731a27530543606673.tar.bz2 | |
spl: add overall SPL size check
This adds a size check for SPL that can dynamically check generated
SPL binaries (including devicetree) for a size limit that ensures
this image plus global data, heap and stack fit in initial SRAM.
Since some of these sizes are not available to make, a new host tool
'spl_size_limit' is added that dumps the resulting maximum size for
an SPL binary to stdout. This tool is used in toplevel Makefile to
implement the size check on SPL binaries.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Diffstat (limited to 'common')
| -rw-r--r-- | common/spl/Kconfig | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/common/spl/Kconfig b/common/spl/Kconfig index c7cd344..6a98536 100644 --- a/common/spl/Kconfig +++ b/common/spl/Kconfig @@ -25,6 +25,42 @@ config SPL_FRAMEWORK supports MMC, NAND and YMODEM and other methods loading of U-Boot and the Linux Kernel. If unsure, say Y. +config SPL_SIZE_LIMIT + hex "Maximum size of SPL image" + depends on SPL + default 0 + help + Specifies the maximum length of the U-Boot SPL image. + If this value is zero, it is ignored. + +config SPL_SIZE_LIMIT_SUBTRACT_GD + bool "SPL image size check: provide space for global data" + depends on SPL_SIZE_LIMIT > 0 + help + If enabled, aligned size of global data is reserved in + SPL_SIZE_LIMIT check to ensure such an image does not overflow SRAM + if SPL_SIZE_LIMIT describes the size of SRAM available for SPL when + pre-reloc global data is put into this SRAM, too. + +config SPL_SIZE_LIMIT_SUBTRACT_MALLOC + bool "SPL image size check: provide space for malloc() pool before relocation" + depends on SPL_SIZE_LIMIT > 0 + help + If enabled, SPL_SYS_MALLOC_F_LEN is reserved in SPL_SIZE_LIMIT check + to ensure such an image does not overflow SRAM if SPL_SIZE_LIMIT + describes the size of SRAM available for SPL when pre-reloc malloc + pool is put into this SRAM, too. + +config SPL_SIZE_LIMIT_PROVIDE_STACK + hex "SPL image size check: provide stack space before relocation" + depends on SPL_SIZE_LIMIT > 0 + default 0 + help + If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such + an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size + of SRAM available for SPL when the stack required before reolcation + uses this SRAM, too. + config HANDOFF bool "Pass hand-off information from SPL to U-Boot proper" depends on BLOBLIST |