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doc: Clean up SYS_MALLOC_SIMPLE

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Move the useful help to Kconfig.

Drop mention of CONFIG_SYS_MALLOC_SIMPLE since it doesn't exist.

Correct a 'CONFIGSYS_MALLOC_F_LEN' typo

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2023-09-26 08:14:29 -06:00
committed by Tom Rini
parent 34bacebd0a
commit 5bcacd1ad5
3 changed files with 12 additions and 23 deletions
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15
Kconfig
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@@ -277,10 +277,17 @@ config SYS_MALLOC_F_LEN
default 0x10000 if ARCH_IMX8 || ARCH_IMX8M
default 0x2000
help
Before relocation, memory is very limited on many platforms. Still,
we can provide a small malloc() pool if needed. Driver model in
particular needs this to operate, so that it can allocate the
initial serial device and any others that are needed.
Size of the malloc() pool for use before relocation. If
this is defined, then a very simple malloc() implementation
will become available before relocation. The address is just
below the global data, and the stack is moved down to make
space.
This feature allocates regions with increasing addresses
within the region. calloc() is supported, but realloc()
is not available. free() is supported but does nothing.
The memory will be freed (or in fact just forgotten) when
U-Boot relocates itself.
config SYS_MALLOC_LEN
hex "Define memory for Dynamic allocation"