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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>
This commit is contained in:
Rudolf Marek 2013-05-27 16:06:43 +02:00 committed by Ronald G. Minnich
parent 81d3d7d001
commit 88ebbeb7e2
3 changed files with 75 additions and 0 deletions
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1
src/include/device/pci_ids.h
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@ -287,6 +287,7 @@
#define PCI_DEVICE_ID_AMD_15H_MODEL_000F_NB_HT 0x1600
#define PCI_DEVICE_ID_AMD_15H_MODEL_001F_NB_HT 0x1400
#define PCI_DEVICE_ID_AMD_10H_NB_HT 0x1200
#define PCI_DEVICE_ID_AMD_15H_NB_IOMMU 0x1419
#define PCI_DEVICE_ID_ATI_SB600_LPC 0x438D
#define PCI_DEVICE_ID_ATI_SB600_SATA 0x4380

1
src/northbridge/amd/agesa/family15tn/Makefile.inc
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@ -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

73
src/northbridge/amd/agesa/family15tn/iommu.c Normal file
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@ -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,
};