From 6c0b45d1ceb13cb409f8d62d712d6f0c44feab6c Mon Sep 17 00:00:00 2001 From: Andrew Thoelke Date: Fri, 20 Jun 2014 00:36:14 +0100 Subject: 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 --- docs/porting-guide.md | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'docs') diff --git a/docs/porting-guide.md b/docs/porting-guide.md index d9701906..f854af91 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 -- cgit