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| author | Andrew Thoelke <andrew.thoelke@arm.com> | 2014-06-20 00:36:14 +0100 |
|---|---|---|
| committer | Andrew Thoelke <andrew.thoelke@arm.com> | 2014-06-23 14:56:12 +0100 |
| commit | 6c0b45d1ceb13cb409f8d62d712d6f0c44feab6c (patch) | |
| tree | 19791165a5a11459b1c176885060f3764d80dc7c /docs | |
| parent | 13ac44a5c7336657ba7518ea31c66f7e7dd7eea8 (diff) | |
Correctly dimension the PSCI aff_map_node array
The array of affinity nodes is currently allocated for 32 entries
with the PSCI_NUM_AFFS value defined in psci.h. This is not enough
for large systems, and will substantially over allocate the array
for small systems.
This patch introduces an optional platform definition
PLATFORM_NUM_AFFS to platform_def.h. If defined this value is
used for PSCI_NUM_AFFS, otherwise a value of two times the number
of CPU cores is used.
The FVP port defines PLATFORM_NUM_AFFS to be 10 which saves
nearly 1.5KB of memory.
Fixes ARM-software/tf-issues#192
Change-Id: I68e30ac950de88cfbd02982ba882a18fb69c1445
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/porting-guide.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index d970190..f854af9 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -150,6 +150,11 @@ file is found in [plat/fvp/include/platform_def.h]. Defines the maximum number of CPUs that can be implemented within a cluster on the platform. +* **#define : PLATFORM_NUM_AFFS** + + Defines the total number of nodes in the affinity heirarchy at all affinity + levels used by the platform. + * **#define : PRIMARY_CPU** Defines the `MPIDR` of the primary CPU on the platform. This value is used |