src/northbridge/amd/pi/00730F01/iommu.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/device.h>
   4 #include <device/pci.h>
   5 #include <device/pci_ids.h>
   6 #include <lib.h>
   7
   8 static void iommu_read_resources(struct device *dev)
   9 {
  10         struct resource *res;
  11
  12         /* Get the normal pci resources of this device */
  13         pci_dev_read_resources(dev);
  14
  15         /* IOMMU MMIO registers */
  16         res = new_resource(dev, 0x44);
  17         res->size = 512 * 1024;
  18         res->align = log2(res->size);
  19         res->gran = log2(res->size);
  20         res->limit = 0xffffffff;        /* 4G */
  21         res->flags = IORESOURCE_MEM;
  22 }
  23
  24 struct device_operations amd_pi_iommu_ops = {
  25         .read_resources = iommu_read_resources,
  26         .set_resources = pci_dev_set_resources,
  27         .enable_resources = pci_dev_enable_resources,
  28         .ops_pci = &pci_dev_ops_pci,
  29 };