xtensa: handle memmap kernel option

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This option is useful for reserving memory regions for secondary cores
in AMP configurations.

Implement the following memmap variants:
- memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory;
- memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved;
- memmap=nn[KMG]: set end of memory.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

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Max Filippov 2014-03-21 21:04:40 +04:00

parent 6232791833

commit 06bd2824f7

2 changed files with 51 additions and 0 deletions

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arch/xtensa/kernel/setup.c

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50

arch/xtensa/mm/init.c

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