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Document: add PLAT_PARTITION_MAX_ENTRIES define 

Partition driver requires the "PLAT_PARTITION_MAX_ENTRIES" definition.

By default, it's defined to 128 in partition driver. But it costs a lot
of memory, and only a few partition entries are really used in platform
partition table. If user wants use memory efficiently, user should
define the build flag in platform.mk instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
This commit is contained in:
Haojian Zhuang 2016-08-17 21:05:07 +08:00
parent 201b66b7e7
commit 7813aae423
1 changed files with 11 additions and 0 deletions
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docs/porting-guide.md
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@ -501,6 +501,17 @@ optionally be defined:
PLAT_PL061_MAX_GPIOS := 160
$(eval $(call add_define,PLAT_PL061_MAX_GPIOS))
If the platform port uses the partition driver, the following constant may
optionally be defined:
* **PLAT_PARTITION_MAX_ENTRIES**
Maximum number of partition entries required by the platform. This allows
control how much memory is allocated for partition entries. The default
value is 128.
[For example, define the build flag in platform.mk]:
PLAT_PARTITION_MAX_ENTRIES := 12
$(eval $(call add_define,PLAT_PARTITION_MAX_ENTRIES))
### File : plat_macros.S [mandatory]