nb,soc/amd/*/iommu: fix comment about IOMMU MMIO resource
This comment was added with the AMD family 15h Trinity IOMMU support in
commit 88ebbeb7e2a914330c869147bacb190b4270532f and looks like a copy of
the comment about the subtractive decode ranges in the LPC device. The
IOMMU doesn't have any subtractively decoded I/O or MMIO ranges and this
is also not what the code does. This resource is the MMIO region to
configure the IOMMU instead, so fix the comment in all copies of the
IOMMU support code.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I2e1e3a46b839b9e58b836932c1bc9b41b1b1dc02
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61631
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
diff --git a/src/northbridge/amd/agesa/family15tn/iommu.c b/src/northbridge/amd/agesa/family15tn/iommu.c
index 7af6538..587e737 100644
--- a/src/northbridge/amd/agesa/family15tn/iommu.c
+++ b/src/northbridge/amd/agesa/family15tn/iommu.c
@@ -13,7 +13,7 @@
/* Get the normal pci resources of this device */
pci_dev_read_resources(dev);
- /* Add an extra subtractive resource for both memory and I/O. */
+ /* IOMMU MMIO registers */
res = new_resource(dev, 0x44);
res->size = 512 * 1024;
res->align = log2(res->size);
diff --git a/src/northbridge/amd/pi/00730F01/iommu.c b/src/northbridge/amd/pi/00730F01/iommu.c
index ef478dd..c79ddb5 100644
--- a/src/northbridge/amd/pi/00730F01/iommu.c
+++ b/src/northbridge/amd/pi/00730F01/iommu.c
@@ -12,7 +12,7 @@
/* Get the normal pci resources of this device */
pci_dev_read_resources(dev);
- /* Add an extra subtractive resource for both memory and I/O. */
+ /* IOMMU MMIO registers */
res = new_resource(dev, 0x44);
res->size = 512 * 1024;
res->align = log2(res->size);
diff --git a/src/soc/amd/common/block/iommu/iommu.c b/src/soc/amd/common/block/iommu/iommu.c
index 67abe9e..9d4f38e 100644
--- a/src/soc/amd/common/block/iommu/iommu.c
+++ b/src/soc/amd/common/block/iommu/iommu.c
@@ -12,7 +12,7 @@
/* Get the normal pci resources of this device */
pci_dev_read_resources(dev);
- /* Add an extra subtractive resource for both memory and I/O. */
+ /* IOMMU MMIO registers */
res = new_resource(dev, 0x44);
res->size = 512 * KiB;
res->align = log2(res->size);