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Juan Castillo 0e5dcdd254 ARM plat: add build option to unlock access to non-secure timer 
Currently, Trusted Firmware on ARM platforms unlocks access to the
timer frame registers that will be used by the Non-Secure world. This
unlock operation should be done by the Non-Secure software itself,
instead of relying on secure firmware settings.

This patch adds a new ARM specific build option 'ARM_CONFIG_CNTACR'
to unlock access to the timer frame by setting the corresponding
bits in the CNTACR<N> register. The frame id <N> is defined by
'PLAT_ARM_NSTIMER_FRAME_ID'. Default value is true (unlock timer
access).

Documentation updated accordingly.

Fixes ARM-software/tf-issues#170

Change-Id: Id9d606efd781e43bc581868cd2e5f9c8905bdbf6
2016-01-20 09:49:45 +00:00
..
diagrams Merge pull request #472 from danh-arm/dh/fwu-docs 2015-12-17 17:37:15 +00:00
plat docs: fix the command to compile BL31 on Tegra 2015-08-01 11:14:32 +05:30
spd Tegra: retrieve BL32's bootargs from bl32_ep_info 2015-07-31 10:26:22 +05:30
auth-framework.md Remove dashes from image names: 'BL3-x' --> 'BL3x' 2015-12-14 12:31:37 +00:00
change-log.md Update change-log.md for v1.2 release 2015-12-21 18:17:12 +00:00
cpu-specific-build-macros.md cortex_a53: Add A53 errata #826319, #836870 2015-08-05 19:58:39 +08:00
firmware-design.md Documentation: Fix broken links in ToCs 2016-01-12 11:19:39 +00:00
firmware-update.md Documentation: Fix broken links in ToCs 2016-01-12 11:19:39 +00:00
interrupt-framework-design.md Documentation: Fix broken links in ToCs 2016-01-12 11:19:39 +00:00
platform-migration-guide.md Remove dashes from image names: 'BL3-x' --> 'BL3x' 2015-12-14 12:31:37 +00:00
porting-guide.md Add 'MAX_MMAP_REGIONS' and 'ADDR_SPACE_SIZE' to the Porting Guide 2016-01-13 11:05:21 +00:00
psci-pd-tree.md PSCI: Introduce new platform interface to describe topology 2015-08-13 16:28:26 +01:00
reset-design.md Introduce the ARM TF reset design document 2015-12-15 15:14:43 +00:00
rt-svc-writers-guide.md Miscellaneous doc fixes for v1.2 2015-12-21 18:10:12 +00:00
trusted-board-boot.md FWU: Add documentation for Firmware Update feature 2015-12-17 16:39:37 +00:00
user-guide.md ARM plat: add build option to unlock access to non-secure timer 2016-01-20 09:49:45 +00:00