diff options
Diffstat (limited to 'docs/porting-guide.rst')
| -rw-r--r-- | docs/porting-guide.rst | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/docs/porting-guide.rst b/docs/porting-guide.rst index a737cf4e6..5462cc1ec 100644 --- a/docs/porting-guide.rst +++ b/docs/porting-guide.rst @@ -1997,6 +1997,25 @@ state. This function must return a pointer to the ``entry_point_info`` structure (that was copied during ``bl31_early_platform_setup()``) if the image exists. It should return NULL otherwise. +Function : bl31_plat_enable_mmu [optional] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +:: + + Argument : uint32_t + Return : void + +This function enables the MMU. The boot code calls this function with MMU and +caches disabled. This function should program necessary registers to enable +translation, and upon return, the MMU on the calling PE must be enabled. + +The function must honor flags passed in the first argument. These flags are +defined by the translation library, and can be found in the file +``include/lib/xlat_tables/xlat_mmu_helpers.h``. + +On DynamIQ systems, this function must not use stack while enabling MMU, which +is how the function in xlat table library version 2 is implementated. + Function : plat\_get\_syscnt\_freq2() [mandatory] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |