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/*
* 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.
*/
#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,
};
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