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memranges: add memranges_update_tag() functionality

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The memranges_update_tag() function replaces all instances
that are tagged with old_tag and update to new_tag. This
can be helpful in the MTRR code by adjusting the address
space if certain memory types cause the MTRR usage to
become too large.

Change-Id: Ie5c405204de2fdd9fd1dd5d6190b223925d6d318
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5150
Tested-by: build bot (Jenkins)
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
This commit is contained in:
Aaron Durbin 2014-02-05 15:44:30 -06:00 committed by Aaron Durbin
parent 3d6ffe76f8
commit ed9307db13
2 changed files with 17 additions and 0 deletions
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4
src/include/memrange.h
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@ -110,6 +110,10 @@ void memranges_create_hole(struct memranges *ranges,
void memranges_insert(struct memranges *ranges, void memranges_insert(struct memranges *ranges,
resource_t base, resource_t size, unsigned long tag); resource_t base, resource_t size, unsigned long tag);
/* Update all entries with old_tag to new_tag. */
void memranges_update_tag(struct memranges *ranges, unsigned long old_tag,
unsigned long new_tag);
/* Returns next entry after the provided entry. NULL if r is last. */ /* Returns next entry after the provided entry. NULL if r is last. */
struct range_entry *memranges_next_entry(struct memranges *ranges, struct range_entry *memranges_next_entry(struct memranges *ranges,
const struct range_entry *r); const struct range_entry *r);

13
src/lib/memrange.c
View File

@ -204,6 +204,19 @@ static void merge_add_memranges(struct memranges *ranges,
merge_neighbor_entries(ranges); merge_neighbor_entries(ranges);
} }
void memranges_update_tag(struct memranges *ranges, unsigned long old_tag,
unsigned long new_tag)
{
struct range_entry *r;
memranges_each_entry(r, ranges) {
if (range_entry_tag(r) == old_tag)
range_entry_update_tag(r, new_tag);
}
merge_neighbor_entries(ranges);
}
typedef void (*range_action_t)(struct memranges *ranges, typedef void (*range_action_t)(struct memranges *ranges,
resource_t begin, resource_t end, resource_t begin, resource_t end,
unsigned long tag); unsigned long tag);