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authorRudolf Marek <r.marek@assembler.cz>2013-05-27 16:06:43 +0200
committerRonald G. Minnich <rminnich@gmail.com>2013-06-24 00:52:50 +0200
commit88ebbeb7e2a914330c869147bacb190b4270532f (patch)
treea103bcdc268657fdd803ac22e6b40e1e13b82399 /src/northbridge
parent81d3d7d00173eafff0ef134bdf1ee5e632f3868a (diff)
downloadcoreboot-88ebbeb7e2a914330c869147bacb190b4270532f.tar.xz
AMD Fam15tn: Add IOMMU BAR allocation to northbridge
For IOMMU we need to allocate a 512 KB BAR in a non-standard location. Use the standard allocator for that and limit the BAR to 32-bits to be compatible with older systems. Change-Id: I44414ce6b264b7f1c086a9b1c7ea275a0830205e Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-on: http://review.coreboot.org/3314 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/agesa/family15tn/Makefile.inc1
-rw-r--r--src/northbridge/amd/agesa/family15tn/iommu.c73
2 files changed, 74 insertions, 0 deletions
diff --git a/src/northbridge/amd/agesa/family15tn/Makefile.inc b/src/northbridge/amd/agesa/family15tn/Makefile.inc
index b609ee6c95..afec3c05b5 100644
--- a/src/northbridge/amd/agesa/family15tn/Makefile.inc
+++ b/src/northbridge/amd/agesa/family15tn/Makefile.inc
@@ -20,6 +20,7 @@
romstage-y += fam15tn_callouts.c
romstage-y += dimmSpd.c
+ramstage-y += iommu.c
ramstage-y += northbridge.c
ramstage-y += fam15tn_callouts.c
ramstage-y += dimmSpd.c
diff --git a/src/northbridge/amd/agesa/family15tn/iommu.c b/src/northbridge/amd/agesa/family15tn/iommu.c
new file mode 100644
index 0000000000..3765f2008f
--- /dev/null
+++ b/src/northbridge/amd/agesa/family15tn/iommu.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Rudolf Marek <r.marek@assembler.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <lib.h>
+
+static void iommu_read_resources(device_t dev)
+{
+ struct resource *res;
+
+ /* Get the normal pci resources of this device */
+ pci_dev_read_resources(dev);
+
+ /* Add an extra subtractive resource for both memory and I/O. */
+ res = new_resource(dev, 0x44);
+ res->size = 512 * 1024;
+ res->align = log2(res->size);
+ res->gran = log2(res->size);
+ res->limit = 0xffffffff; /* 4G */
+ res->flags = IORESOURCE_MEM;
+}
+
+static void iommu_set_resources(device_t dev)
+{
+ struct resource *res;
+
+ pci_dev_set_resources(dev);
+
+ res = find_resource(dev, 0x44);
+ /* Remember this resource has been stored */
+ res->flags |= IORESOURCE_STORED;
+ /* For now, do only 32-bit space allocation */
+ pci_write_config32(dev, 0x48, 0x0);
+ pci_write_config32(dev, 0x44, res->base | (1 << 0));
+}
+
+static struct pci_operations lops_pci = {
+ .set_subsystem = pci_dev_set_subsystem,
+};
+
+static struct device_operations iommu_ops = {
+ .read_resources = iommu_read_resources,
+ .set_resources = iommu_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = 0,
+ .scan_bus = 0,
+ .ops_pci = &lops_pci,
+};
+
+static const struct pci_driver iommu_driver __pci_driver = {
+ .ops = &iommu_ops,
+ .vendor = PCI_VENDOR_ID_AMD,
+ .device = PCI_DEVICE_ID_AMD_15H_NB_IOMMU,
+};