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| author | Nico Huber <nico.h@gmx.de> | 2020-05-25 00:03:14 +0200 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2022-09-04 16:35:22 +0000 |
| commit | 526c64249a0a0c7b83d1914b88d4f938ede7dc1c (patch) | |
| tree | 639322f2e32b0c11e629cc329e16c5c681c54781 /src/include/memrange.h | |
| parent | 38688519cf4bca485c41b48ac5c0cc334daa8ba7 (diff) | |
| download | coreboot-526c64249a0a0c7b83d1914b88d4f938ede7dc1c.tar.gz coreboot-526c64249a0a0c7b83d1914b88d4f938ede7dc1c.tar.bz2 coreboot-526c64249a0a0c7b83d1914b88d4f938ede7dc1c.zip | |
allocator_v4: Introduce RESOURCE_ALLOCATION_TOP_DOWN
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>
Diffstat (limited to 'src/include/memrange.h')
| -rw-r--r-- | src/include/memrange.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/include/memrange.h b/src/include/memrange.h index a8a8de9c2d33..f7c5bfce1e7e 100644 --- a/src/include/memrange.h +++ b/src/include/memrange.h @@ -161,15 +161,17 @@ struct range_entry *memranges_next_entry(struct memranges *ranges, const struct range_entry *r); /* Steals memory from the available list in given ranges as per the constraints: - * limit = Upper bound for the memory range to steal (Inclusive). - * size = Requested size for the stolen memory. - * align = Required alignment(log 2) for the starting address of the stolen memory. - * tag = Use a range that matches the given tag. + * limit = Upper bound for the memory range to steal (Inclusive). + * size = Requested size for the stolen memory. + * align = Required alignment(log 2) for the starting address of the stolen memory. + * tag = Use a range that matches the given tag. + * from_top = Steal the highest possible range. * * If the constraints can be satisfied, this function creates a hole in the memrange, * writes the base address of that hole to stolen_base and returns true. Otherwise it returns * false. */ bool memranges_steal(struct memranges *ranges, resource_t limit, resource_t size, - unsigned char align, unsigned long tag, resource_t *stolen_base); + unsigned char align, unsigned long tag, resource_t *stolen_base, + bool from_top); #endif /* MEMRANGE_H_ */ |