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authorAaron Durbin <adurbin@chromium.org>2014-02-08 15:41:52 -0600
committerAaron Durbin <adurbin@google.com>2014-02-09 22:08:53 +0100
commitca4f4b8c9eef77fbcad0af3b21885a337a1f2c83 (patch)
treed6d185b7a25c9a1f8c0e6105f34178cb0658ba71 /src/lib
parent892728c65fcd82cab43e334396b86fc257ecf256 (diff)
downloadcoreboot-ca4f4b8c9eef77fbcad0af3b21885a337a1f2c83.tar.xz
mtrr: only add prefetchable resources as WRCOMB for VGA devices
Be more conservative and only add VGA devices' prefetchable resources as write-combining in the address space. Previously all prefetchable memory was added as a write-combining memory type. Some hardware incorrectly advertises its BAR as prefetchable when it shouldn't be. A new memranges_add_resources_filter() function is added to provide additional filtering on device and resource. Change-Id: I3fc55b90d8c5b694c5aa9e2f34db1b4ef845ce10 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/5169 Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/lib')
-rw-r--r--src/lib/memrange.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/src/lib/memrange.c b/src/lib/memrange.c
index 7fb6ef7b06..a85bc01d49 100644
--- a/src/lib/memrange.c
+++ b/src/lib/memrange.c
@@ -252,6 +252,7 @@ void memranges_insert(struct memranges *ranges,
struct collect_context {
struct memranges *ranges;
unsigned long tag;
+ memrange_filter_t filter;
};
static void collect_ranges(void *gp, struct device *dev, struct resource *res)
@@ -261,12 +262,14 @@ static void collect_ranges(void *gp, struct device *dev, struct resource *res)
if (res->size == 0)
return;
- memranges_insert(ctx->ranges, res->base, res->size, ctx->tag);
+ if (ctx->filter == NULL || ctx->filter(dev, res))
+ memranges_insert(ctx->ranges, res->base, res->size, ctx->tag);
}
-void memranges_add_resources(struct memranges *ranges,
- unsigned long mask, unsigned long match,
- unsigned long tag)
+void memranges_add_resources_filter(struct memranges *ranges,
+ unsigned long mask, unsigned long match,
+ unsigned long tag,
+ memrange_filter_t filter)
{
struct collect_context context;
@@ -276,9 +279,17 @@ void memranges_add_resources(struct memranges *ranges,
context.ranges = ranges;
context.tag = tag;
+ context.filter = filter;
search_global_resources(mask, match, collect_ranges, &context);
}
+void memranges_add_resources(struct memranges *ranges,
+ unsigned long mask, unsigned long match,
+ unsigned long tag)
+{
+ memranges_add_resources_filter(ranges, mask, match, tag, NULL);
+}
+
void memranges_init(struct memranges *ranges,
unsigned long mask, unsigned long match,
unsigned long tag)