northbridge/intel/i945: Mark legacy VGA memory as reserved
This change adds legacy VGA memory (0xa0000 - 0xbffff) as
mmio_resource in northbridge.c read_resources() to match what is
exposed to the OS in hostbridge.asl. It ensures that the resource
allocator does not use this range for dynamic resource allocation.
Change-Id: I24e3aaf97202575fa9df8408366c8db5bea07145
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41482
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index f814c97..56cad7a 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -110,6 +110,8 @@
uma_resource(dev, 5, uma_memory_base >> 10, uma_memory_size >> 10);
mmio_resource(dev, 6, tseg_memory_base >> 10, tseg_memory_size >> 10);
uma_resource(dev, 7, cbmem_topk, delta_cbmem);
+ /* legacy VGA memory */
+ mmio_resource(dev, 8, 640, 768 - 640);
}
static void mch_domain_set_resources(struct device *dev)