src/soc/intel/quark/northcluster.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <cbmem.h>
  16 #include <device/pci.h>
  17 #include <device/pci_ids.h>
  18 #include <soc/iomap.h>
  19 #include <soc/ramstage.h>
  20
  21 #define RES_IN_KIB(r) ((r) >> 10)
  22
  23 static void nc_read_resources(struct device *dev)
  24 {
  25         unsigned long base_k;
  26         int index = 0;
  27         unsigned long size_k;
  28
  29         /* Read standard PCI resources. */
  30         pci_dev_read_resources(dev);
  31
  32         /* 0 -> 0xa0000 */
  33         base_k = 0;
  34         size_k = 0xa0000 - base_k;
  35         ram_resource(dev, index++, RES_IN_KIB(base_k), RES_IN_KIB(size_k));
  36
  37         /*
  38          * Reserve everything between A segment and 1MB:
  39          *
  40          * 0xa0000 - 0xbffff: legacy VGA
  41          * 0xc0000 - 0xdffff: RAM
  42          * 0xe0000 - 0xfffff: ROM shadow
  43          */
  44         base_k += size_k;
  45         size_k = 0xc0000 - base_k;
  46         mmio_resource(dev, index++, RES_IN_KIB(base_k), RES_IN_KIB(size_k));
  47
  48         base_k += size_k;
  49         size_k = 0x100000 - base_k;
  50         reserved_ram_resource(dev, index++, RES_IN_KIB(base_k),
  51                 RES_IN_KIB(size_k));
  52
  53         /* 0x100000 -> cbmem_top - cacheable and usable */
  54         base_k += size_k;
  55         size_k = (unsigned long)cbmem_top() - base_k;
  56         ram_resource(dev, index++, RES_IN_KIB(base_k), RES_IN_KIB(size_k));
  57
  58         /* cbmem_top -> 0xc0000000 - reserved */
  59         base_k += size_k;
  60         size_k = 0xc0000000 - base_k;
  61         reserved_ram_resource(dev, index++, RES_IN_KIB(base_k),
  62                 RES_IN_KIB(size_k));
  63
  64         /* 0xc0000000 -> 4GiB is mmio. */
  65         base_k += size_k;
  66         size_k = 0x100000000ull - base_k;
  67         mmio_resource(dev, index++, RES_IN_KIB(base_k), RES_IN_KIB(size_k));
  68 }
  69
  70 static struct device_operations nc_ops = {
  71         .read_resources   = nc_read_resources,
  72         .set_resources    = pci_dev_set_resources,
  73         .enable_resources = pci_dev_enable_resources,
  74 };
  75
  76 static const struct pci_driver systemagent_driver __pci_driver = {
  77         .ops    = &nc_ops,
  78         .vendor = PCI_VENDOR_ID_INTEL,
  79         .device = QUARK_MC_DEVICE_ID
  80 };