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coreboot memrange: Two changes for zero size or empty memrange 

1) Add check for zero size in memrange.
2) Add public memrange_init_empty function to allow initializing only the
memrange structure without filling in device resources

BUG=None
BRANCH=None
TEST=Compiles and runs succesfully for rush MMU memranges.

Original-Change-Id: I8e4d864cbc9a770cd208f8a9f83f509dc7ace894
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/208957
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 5c42301c2a51a1a2a29ef58012f210d03bd37f94)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8d63abb15efda74270ef6fa3c0df55c05659595d
Reviewed-on: http://review.coreboot.org/8597
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
This commit is contained in:
Furquan Shaikh 2014-07-18 10:25:54 -07:00 committed by Marc Jones
parent 2dd161f556
commit 196ee2b029
2 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/include/memrange.h
View File

@ -75,6 +75,9 @@ static inline void range_entry_update_tag(struct range_entry *r,
#define memranges_each_entry(r, ranges) \
for (r = (ranges)->entries; r != NULL; r = r->next)
/* Initialize memranges structure */
void memranges_init_empty(struct memranges *ranges);
/* Initialize and fill a memranges structure according to the
* mask and match type for all memory resources. Tag each entry with the
* specified type. */

10
src/lib/memrange.c
View File

@ -228,6 +228,9 @@ static void do_action(struct memranges *ranges,
resource_t end;
resource_t begin;
if (size == 0)
return;
/* The addresses are aligned to 4096 bytes: the begin address is
* aligned down while the end address is aligned up to be conservative
* about the full range covered. */
@ -290,11 +293,16 @@ void memranges_add_resources(struct memranges *ranges,
memranges_add_resources_filter(ranges, mask, match, tag, NULL);
}
void memranges_init_empty(struct memranges *ranges)
{
ranges->entries = NULL;
}
void memranges_init(struct memranges *ranges,
unsigned long mask, unsigned long match,
unsigned long tag)
{
ranges->entries = NULL;
memranges_init_empty(ranges);
memranges_add_resources(ranges, mask, match, tag);
}