* adjust __spin_table alignment to match ePAPR v0.94 spec
* loop over all cpus when determing who is up. This fixes an issue if
the "boot cpu" isn't core0. The "boot cpu" will already be in the
cpu_up_mask so there is no harm
* Added some protection in the code to ensure proper behavior. These
changes are explicitly needed but don't hurt:
- Added eieio to ensure the "hot word" of the table is written after
all other table updates have occurred.
- Added isync to ensure we don't prefetch loading of table entries
until we a released
These issues we raised by Dave Liu.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
We were looking at the wrong memory offset to determine of a secondary
cpu had been spun up or not. Also added a warning message if the
all the secondary cpus we expect don't spin up.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Provide a board_lmb_reserve helper function to ensure we reserve
the page of memory we are using for the boot page translation code.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The following changes are needed to be inline with ePAPR v0.81:
* r4, r5 and now always set to 0 on boot release
* r7 is used to pass the size of the initial map area (IMA)
* EPAPR_MAGIC value changed for book-e processors
* changes in the spin table layout
* spin table supports a 64-bit physical release address
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Added the cpu command that provides a generic mechanism to get status,
reset, and release secondary cores in multicore processors.
Added support for using the ePAPR defined spin-table mechanism on 85xx.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Kumar Gala