src/northbridge/amd/amdk8/misc_control.c

   1 /* Turn off machine check triggers when reading
   2  * pci space where there are no devices.
   3  * This is necessary when scaning the bus for
   4  * devices which is done by the kernel */
   5
   6 #include <console/console.h>
   7 #include <device/device.h>
   8 #include <device/pci.h>
   9 #include <device/pci_ids.h>
  10 #include <device/pci_ops.h>
  11 #include "./cpu_rev.c"
  12
  13 static void misc_control_init(struct device *dev)
  14 {
  15         uint32_t cmd;
  16
  17         printk_debug("NB: Function 3 Misc Control.. ");
  18         cmd = pci_read_config32(dev, 0x44);
  19         cmd |= (1<<6) | (1<<25);
  20         pci_write_config32(dev, 0x44, cmd );
  21         if (is_cpu_pre_c0()) {
  22                 /* errata 58 */
  23                 cmd = pci_read_config32(dev, 0x80);
  24                 cmd &= ~(1<<0);
  25                 pci_write_config32(dev, 0x80, cmd );
  26                 cmd = pci_read_config32(dev, 0x84);
  27                 cmd &= ~(1<<24);
  28                 cmd &= ~(1<<8);
  29                 pci_write_config32(dev, 0x84, cmd );
  30                 /* errata 66 */
  31                 cmd = pci_read_config32(dev, 0x70);
  32                 cmd &= ~(1<<0);
  33                 cmd |= (1<<1);
  34                 pci_write_config32(dev, 0x70, cmd );
  35                 cmd = pci_read_config32(dev, 0x7c);
  36                 cmd &= ~(3<<4);
  37                 pci_write_config32(dev, 0x7c, cmd );
  38         }
  39         else {
  40                 /* errata 98 */
  41 #if 0
  42                 cmd = pci_read_config32(dev, 0xd4);
  43                 if(cmd != 0x04e20707) {
  44                         cmd = 0x04e20707;
  45                         pci_write_config32(dev, 0xd4, cmd );
  46                         hard_reset();
  47                 }
  48 #endif
  49
  50                 cmd = 0x04e20707;
  51                 pci_write_config32(dev, 0xd4, cmd );
  52         }
  53 #if 1
  54         cmd = pci_read_config32(dev, 0xdc);
  55         if((cmd & 0x0000ff00) != 0x02500) {
  56                 cmd &= 0xffff00ff;
  57                 cmd |= 0x00002500;
  58                 pci_write_config32(dev, 0xdc, cmd );
  59                 printk_debug("resetting cpu\n");
  60                 hard_reset();
  61         }
  62 #endif
  63         printk_debug("done.\n");
  64 }
  65
  66 static struct device_operations mcf3_ops  = {
  67         .read_resources   = pci_dev_read_resources,
  68         .set_resources    = pci_dev_set_resources,
  69         .enable_resources = pci_dev_enable_resources,
  70         .init             = misc_control_init,
  71         .scan_bus         = 0,
  72 };
  73
  74 static struct pci_driver mcf3_driver __pci_driver = {
  75         .ops    = &mcf3_ops,
  76         .vendor = PCI_VENDOR_ID_AMD,
  77         .device = 0x1103,
  78 };
  79