Commit graph

5 commits

Author SHA1 Message Date
Kumar Gala
cf6cc01427 85xx: Additional fixes and cleanup of MP code
* 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>
2008-04-29 09:42:19 -05:00
Kumar Gala
97b3ecb575 85xx: Fix detection of MP cpu spin up
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>
2008-04-11 17:32:56 -05:00
Kumar Gala
dd6c910aad 85xx: Add cpu_mp_lmb_reserve helper to reserve boot page
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>
2008-03-26 11:43:04 -05:00
Kumar Gala
79679d8002 85xx: Update multicore boot mechanism to ePAPR v0.81 spec
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>
2008-03-26 11:43:04 -05:00
Kumar Gala
ec2b74ffd3 85xx: Added support for multicore boot mechanism
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>
2008-03-26 11:43:03 -05:00