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authorSimon Goldschmidt <simon.k.r.goldschmidt@gmail.com>2019-10-22 21:29:46 +0200
committerTom Rini <trini@konsulko.com>2019-11-07 18:01:13 -0500
commit93db2b83ed515fd5700b6c5abb0fba612ef2cdcb (patch)
tree6b8a8a625c719feeed920bea7bea25c39ed7795f /Kconfig
parent37e66ba916cf2b911ca03479f3cdcccc9f7932a1 (diff)
downloadu-boot-93db2b83ed515fd5700b6c5abb0fba612ef2cdcb.tar.gz
Kconfig add config ERR_PTR_OFFSET
Some U-Boot pointers have redundant information, so we can use a scheme where we can return either an error code or a pointer with the same return value. The default implementation just casts the pointer to a number, however, this may fail on platforms where the end of the address range is used for valid pointers (e.g. 0xffffff00 is a valid heap pointer in socfpga SPL). For such platforms, this value provides an upper range of those error pointer values - up to 'MAX_ERRNO' bytes below this value must be unused/invalid addresses. Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Diffstat (limited to 'Kconfig')
-rw-r--r--Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/Kconfig b/Kconfig
index 66b059f749..cda4f58ff7 100644
--- a/Kconfig
+++ b/Kconfig
@@ -281,6 +281,20 @@ config SYS_LDSCRIPT
Path within the source tree to the linker script to use for the
main U-Boot binary.
+config ERR_PTR_OFFSET
+ hex
+ default 0x0
+ help
+ Some U-Boot pointers have redundant information, so we can use a
+ scheme where we can return either an error code or a pointer with the
+ same return value. The default implementation just casts the pointer
+ to a number, however, this may fail on platforms where the end of the
+ address range is used for valid pointers (e.g. 0xffffff00 is a valid
+ heap pointer in socfpga SPL).
+ For such platforms, this value provides an upper range of those error
+ pointer values - up to 'MAX_ERRNO' bytes below this value must be
+ unused/invalid addresses.
+
endmenu # General setup
menu "Boot images"