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| author | Patrick Delaunay <patrick.delaunay@foss.st.com> | 2021-03-10 12:16:31 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-04-22 21:09:45 +0300 |
| commit | 6d66502bc74182105c7fc77efe7bf8d04ac4e345 (patch) | |
| tree | 753e7f81b935265fc0bbc931099f740d9fb71ebf /lib/Kconfig | |
| parent | a57b596e8b3eb3b24af31ce91b2fd6a57d8df0ba (diff) | |
| download | u-boot-6d66502bc74182105c7fc77efe7bf8d04ac4e345.tar.xz | |
lmb: Add 2 config to define the max number of regions
Add 2 configs CONFIG_LMB_MEMORY_REGIONS and CONFIG_LMB_RESERVED_REGIONS
to change independently the max number of the regions in lmb
library.
When CONFIG_LMB_USE_MAX_REGIONS=y, move the lmb property arrays to
struct lmb and manage the array size with the element 'max' of struct
lmb_region; their are still allocated in stack.
When CONFIG_LMB_USE_MAX_REGIONS=n, keep the current location in
struct lmb_region to allow compiler optimization.
Increase CONFIG_LMB_RESERVED_REGIONS is useful to avoid lmb errors in
bootm when the number of reserved regions (not adjacent) is reached:
+ 1 region for relocated U-Boot
+ 1 region for initrd
+ 1 region for relocated linux device tree
+ reserved memory regions present in Linux device tree.
The current limit of 8 regions is reached with only 5 reserved regions
in DT.
see Linux kernel commit bf23c51f1f49 ("memblock: Move memblock arrays
to static storage in memblock.c and make their size a variable")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Diffstat (limited to 'lib/Kconfig')
| -rw-r--r-- | lib/Kconfig | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index e46c51f123..6d2d41de30 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -707,14 +707,41 @@ config LMB help Support the library logical memory blocks. +config LMB_USE_MAX_REGIONS + bool "Use a commun number of memory and reserved regions in lmb lib" + depends on LMB + default y + help + Define the number of supported memory regions in the library logical + memory blocks. + This feature allow to reduce the lmb library size by using compiler + optimization when LMB_MEMORY_REGIONS == LMB_RESERVED_REGIONS. config LMB_MAX_REGIONS int "Number of memory and reserved regions in lmb lib" - depends on LMB + depends on LMB && LMB_USE_MAX_REGIONS default 8 help Define the number of supported regions, memory and reserved, in the library logical memory blocks. + +config LMB_MEMORY_REGIONS + int "Number of memory regions in lmb lib" + depends on LMB && !LMB_USE_MAX_REGIONS + default 8 + help + Define the number of supported memory regions in the library logical + memory blocks. + The minimal value is CONFIG_NR_DRAM_BANKS. + +config LMB_RESERVED_REGIONS + int "Number of reserved regions in lmb lib" + depends on LMB && !LMB_USE_MAX_REGIONS + default 8 + help + Define the number of supported reserved regions in the library logical + memory blocks. + endmenu config PHANDLE_CHECK_SEQ |