Line data    Source code

       1             : /*      $OpenBSD: aapic.c,v 1.6 2015/03/14 03:38:46 jsg Exp $   */
       2             : /*      $NetBSD: aapic.c,v 1.3 2005/01/13 23:40:01 fvdl Exp $   */
       3             : 
       4             : /*
       5             :  * The AMD 8131 IO APIC can hang the box when an APIC IRQ is masked.
       6             :  */
       7             : #include <sys/param.h>
       8             : #include <sys/systm.h>
       9             : #include <sys/device.h>
      10             : 
      11             : #include <dev/pci/pcireg.h>
      12             : #include <dev/pci/pcivar.h>
      13             : #include <dev/pci/pcidevs.h>
      14             : 
      15             : #include "ioapic.h"
      16             : 
      17             : #if NIOAPIC > 0
      18             : extern int nioapics;
      19             : #endif
      20             : 
      21             : #define AMD8131_PCIX_MISC       0x40
      22             : #define AMD8131_NIOAMODE        0x00000001
      23             : 
      24             : #define AMD8131_IOAPIC_CTL      0x44
      25             : #define AMD8131_IOAEN           0x00000002
      26             : 
      27             : int     aapic_match(struct device *, void *, void *);
      28             : void    aapic_attach(struct device *, struct device *, void *);
      29             : 
      30             : struct aapic_softc {
      31             :         struct device sc_dev;
      32             : };
      33             : 
      34             : struct cfattach aapic_ca = {
      35             :         sizeof(struct aapic_softc), aapic_match, aapic_attach
      36             : };
      37             : 
      38             : struct cfdriver aapic_cd = {
      39             :         0, "aapic", DV_DULL
      40             : };
      41             : 
      42             : int
      43           0 : aapic_match(struct device *parent, void *match, void *aux)
      44             : {
      45           0 :         struct pci_attach_args *pa = aux;
      46             : 
      47           0 :         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD &&
      48           0 :             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_8131_PCIX_IOAPIC)
      49           0 :                 return (1);
      50             : 
      51           0 :         return (0);
      52           0 : }
      53             : 
      54             : void
      55           0 : aapic_attach(struct device *parent, struct device *self, void *aux)
      56             : {
      57           0 :         struct pci_attach_args *pa = aux;
      58           0 :         int bus, dev, func;
      59             :         pcitag_t tag;
      60             :         pcireg_t reg;
      61             : 
      62           0 :         printf("\n");
      63             : 
      64             : #if NIOAPIC > 0
      65           0 :         if (nioapics == 0)
      66           0 :                 return;
      67             : #else
      68             :         return;
      69             : #endif
      70             :         
      71           0 :         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMD8131_IOAPIC_CTL);
      72           0 :         reg |= AMD8131_IOAEN;
      73           0 :         pci_conf_write(pa->pa_pc, pa->pa_tag, AMD8131_IOAPIC_CTL, reg);
      74             : 
      75           0 :         pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &dev, &func);
      76           0 :         func = 0;
      77           0 :         tag = pci_make_tag(pa->pa_pc, bus, dev, func);
      78           0 :         reg = pci_conf_read(pa->pa_pc, tag, AMD8131_PCIX_MISC);
      79           0 :         reg &= ~AMD8131_NIOAMODE;
      80           0 :         pci_conf_write(pa->pa_pc, tag, AMD8131_PCIX_MISC, reg);
      81           0 : }