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| author | Aaron Durbin <adurbin@chromium.org> | 2018-05-03 13:49:41 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-05-14 08:39:18 +0000 |
| commit | 223fb436fe89a265f4ddbe7f8fe38a35b47a8253 (patch) | |
| tree | e4c4b0d95dadf15da2a8946ae50930c637d3f8c6 /src/include/cpu/x86/mp.h | |
| parent | e6cc21e262aec4846831dd1da57d34cc8fc9099f (diff) | |
| download | coreboot-223fb436fe89a265f4ddbe7f8fe38a35b47a8253.tar.xz | |
cpu/x86/mp: pass pointers to structures for AP callbacks
In order to extend the MP callback infrastructure prepare for
easier changes by making the AP callback get signalled by a
single pointer to a local variable on the signaller's stack.
When the APs see the callback they will copy the structure
to a local variable and then set the acknowledgement by
clearing out the slot.
The reading and writing to the slots were implemented using inline
assembly which forces a memory access and a compiler barrier.
BUG=b:74436746
Change-Id: Ia46133a49c03ce3ce0e73ae3d30547316c7ec43c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/26043
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/include/cpu/x86/mp.h')
0 files changed, 0 insertions, 0 deletions