[PATCH v2] ARM: Add BSP_START_NEEDS_REGISTER_INITIALIZATION

[Sebastian Huber]

Hello Martin,

sorry, I should have look at your bsp-start-init-registers.s earlier. 
This stuff looks so generic, that it should go directly into start.S. I 
guess the TMS570 will not remain the only ARM core with a lockstep feature.

You don't have to save and restore the r0 in a function since its a 
volatile register.

On 26/02/15 15:38, Martin Galvan wrote:
> Changes from v1:
>      * Add bsp_start_* prefixes.
>      * Add *_banked_fiq suffixes to make it clear it's referring to the FIQ mode banked regs.
>
> Follow-up from here:
>
> https://lists.rtems.org/pipermail/devel/2015-February/009974.html
>
> This patch adds the macro BSP_START_NEEDS_REGISTER_INITIALIZATION and three hooks for BSP-specific register init code to arm/shared/start.S. Said hooks are bsp_start_init_registers_core (intended for initializing the ARM core registers), bsp_start_init_registers_banked_fiq (for the FIQ mode banked registers) and bsp_start_init_registers_vfp (for the FPU registers). BSP_START_NEEDS_REGISTER_INITIALIZATION would be defined in a BSP's configure.ac (so that it appears in its bspopts.h).
>
> This patch also adds the register init code required by the TMS570. We've tested it with the tms570ls3137_hdk.cfg config and it works fine.

-- 
Sebastian Huber, embedded brains GmbH

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