[U-Boot] [PATCH v3] 85xx: Add support for not releasing secondary cores via 'mp_holdoff'

[Kumar Gala]

On Sep 30, 2010, at 12:22 PM, Peter Tyser wrote:

> From: Aaron Sierra <asierra at xes-inc.com>
> 
> Some OSes require that secondary cores not be initialized when they
> are booted (eg VxWorks).  By default when U-Boot is compiled with the
> CONFIG_MP option all secondary cores are brought out of reset and held
> in spinloops.  Setting the "mp_holdoff" environment variable to 'yes'
> or '1' will cause U-Boot to leave secondary cores in their default
> state.
> 
> Signed-off-by: Aaron Sierra <asierra at xes-inc.com>
> Signed-off-by: Peter Tyser <ptyser at xes-inc.com>
> ---
> Changes since v1:
> - Update 'enable-method' in dtb appropriately
> - Don't set cpu-release-addr if spin-table isn't used
> - Add hold_cores_in_reset() function with more intelligent mp_holdoff
>  environment variable checking
> 
> Changes since v2:
> - Fixed enable-method inconsistency pointed out by Scott
> 
> arch/powerpc/cpu/mpc85xx/fdt.c |   22 +++++++++++++++++++---
> arch/powerpc/cpu/mpc85xx/mp.c  |   31 +++++++++++++++++++++++++++++++
> arch/powerpc/cpu/mpc85xx/mp.h  |    1 +
> 3 files changed, 51 insertions(+), 3 deletions(-)

applied to 85xx

- k