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allocator_v4: Introduce RESOURCE_ALLOCATION_TOP_DOWN

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Add option to resource allocator v4 that restores the top-down
allocation approach at the domain level.

This makes it easier to handle 64-bit resources natively. With
the top-down approach, resources that can be placed either above
or below 4G would be placed above, to save precious space below
the 4G boundary.

Change-Id: Iaf463d3e6b37d52e46761d8e210034fded58a8a4
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41957
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
This commit is contained in:
Nico Huber
2020-05-25 00:03:14 +02:00
committed by Martin L Roth
parent 38688519cf
commit 526c64249a
5 changed files with 72 additions and 34 deletions
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5
src/device/Kconfig
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@@ -933,6 +933,11 @@ config RESOURCE_ALLOCATOR_V4
ranges for allocating resources. This allows allocation of resources
above 4G boundary as well.
config RESOURCE_ALLOCATION_TOP_DOWN
bool "Allocate resources from top down"
default y
depends on RESOURCE_ALLOCATOR_V4
config XHCI_UTILS
def_bool n
help