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aapic.c revision 1.1 
      1 /* 	$NetBSD: aapic.c,v 1.1 2004/04/18 18:34:22 fvdl Exp $	*/
      2 
      3 #include <sys/cdefs.h>
      4 __KERNEL_RCSID(0, "$NetBSD: aapic.c,v 1.1 2004/04/18 18:34:22 fvdl Exp $");
      5 
      6 #include <sys/param.h>
      7 #include <sys/systm.h>
      8 #include <sys/kernel.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 <arch/x86/pci/amd8131reg.h>
     16 
     17 static int	aapic_match __P((struct device *, struct cfdata *, void *));
     18 static void	aapic_attach __P((struct device *, struct device *, void *));
     19 
     20 struct aapic_softc {
     21 	struct device sc_dev;
     22 };
     23 
     24 CFATTACH_DECL(aapic, sizeof(struct aapic_softc),
     25     aapic_match, aapic_attach, NULL, NULL);
     26 
     27 static int
     28 aapic_match(parent, match, aux)
     29 	struct device *parent;
     30 	struct cfdata *match;
     31 	void *aux;
     32 {
     33 	struct pci_attach_args *pa = aux;
     34 
     35 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD &&
     36 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PCIX8131_APIC)
     37 		return (1);
     38 
     39 	return (0);
     40 }
     41 
     42 static void
     43 aapic_attach(parent, self, aux)
     44 	struct device *parent, *self;
     45 	void *aux;
     46 {
     47 	struct pci_attach_args *pa = aux;
     48 	char devinfo[256];
     49 	int bus, dev, func, rev;
     50 	pcitag_t tag;
     51 	pcireg_t reg;
     52 
     53 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
     54 	rev = PCI_REVISION(pa->pa_class);
     55 	printf(": %s (rev. 0x%02x)\n", devinfo, rev);
     56 
     57 	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMD8131_IOAPIC_CTL);
     58 	if ((reg & AMD8131_IOAEN) == 0) {
     59 		reg |= AMD8131_IOAEN;
     60 		pci_conf_write(pa->pa_pc, pa->pa_tag, AMD8131_IOAPIC_CTL, reg);
     61 	}
     62 
     63 	/*
     64 	 * Work around erratum #22 for A0 and B0 revisions.
     65 	 */
     66 	if (rev == 0x01 || rev == 0x11) {
     67 		pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &dev, &func);
     68 		func = 0;
     69 		tag = pci_make_tag(pa->pa_pc, bus, dev, func);
     70 		reg = pci_conf_read(pa->pa_pc, tag, AMD8131_PCIX_MISC);
     71 		reg &= ~0x00000001;
     72 		pci_conf_write(pa->pa_pc, tag, AMD8131_PCIX_MISC, reg);
     73 	}
     74 }
     75