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| author | Soby Mathew <soby.mathew@arm.com> | 2017-04-10 22:35:42 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2017-04-19 12:07:05 +0100 |
| commit | bcc3c49c90a1e79befa72b8871d4d4c6031c15b7 (patch) | |
| tree | b8db9a6092fe72f8f20ece477832b5ac87cbfce6 /docs | |
| parent | 9423f8eca723ba2dc410f9ed0907cfafbe8a070e (diff) | |
PSCI: Build option to enable D-Caches early in warmboot
This patch introduces a build option to enable D-cache early on the CPU
after warm boot. This is applicable for platforms which do not require
interconnect programming to enable cache coherency (eg: single cluster
platforms). If this option is enabled, then warm boot path enables
D-caches immediately after enabling MMU.
Fixes ARM-Software/tf-issues#456
Change-Id: I44c8787d116d7217837ced3bcf0b1d3441c8d80e
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/user-guide.md | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/docs/user-guide.md b/docs/user-guide.md index a1df9652..af7741e6 100644 --- a/docs/user-guide.md +++ b/docs/user-guide.md @@ -349,7 +349,8 @@ performed. initiate the operations, and the rest is managed in hardware, minimizing active software management. In such systems, this boolean option enables ARM Trusted Firmware to carry out build and run-time optimizations during boot - and power management operations. This option defaults to 0. + and power management operations. This option defaults to 0 and if it is + enabled, then it implies `WARMBOOT_ENABLE_DCACHE_EARLY` is also enabled. * `LOAD_IMAGE_V2`: Boolean option to enable support for new version (v2) of image loading, which provides more flexibility and scalability around what @@ -508,6 +509,12 @@ performed. to a string formed by concatenating the version number, build type and build string. +* `WARMBOOT_ENABLE_DCACHE_EARLY` : Boolean option to enable D-cache early on + the CPU after warm boot. This is applicable for platforms which do not + require interconnect programming to enable cache coherency (eg: single + cluster platforms). If this option is enabled, then warm boot path + enables D-caches immediately after enabling MMU. This option defaults to 0. + #### ARM development platform specific build options * `ARM_BL31_IN_DRAM`: Boolean option to select loading of BL31 in TZC secured |