/* $OpenBSD: pci_kn20aa.c,v 1.23 2008/07/22 18:45:51 miod Exp $ */ /* $NetBSD: pci_kn20aa.c,v 1.21 1996/11/17 02:05:27 cgd Exp $ */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sio.h" #if NSIO #include #endif int dec_kn20aa_intr_map(struct pci_attach_args *, pci_intr_handle_t *); const char *dec_kn20aa_intr_string(void *, pci_intr_handle_t); int dec_kn20aa_intr_line(void *, pci_intr_handle_t); void *dec_kn20aa_intr_establish(void *, pci_intr_handle_t, int, int (*func)(void *), void *, char *); void dec_kn20aa_intr_disestablish(void *, void *); #define KN20AA_PCEB_IRQ 31 #define KN20AA_MAX_IRQ 32 #define PCI_STRAY_MAX 5 struct alpha_shared_intr *kn20aa_pci_intr; struct evcount kn20aa_intr_count; void kn20aa_iointr(void *arg, unsigned long vec); void kn20aa_enable_intr(int irq); void kn20aa_disable_intr(int irq); void pci_kn20aa_pickintr(ccp) struct cia_config *ccp; { int i; bus_space_tag_t iot = &ccp->cc_iot; pci_chipset_tag_t pc = &ccp->cc_pc; pc->pc_intr_v = ccp; pc->pc_intr_map = dec_kn20aa_intr_map; pc->pc_intr_string = dec_kn20aa_intr_string; pc->pc_intr_line = dec_kn20aa_intr_line; pc->pc_intr_establish = dec_kn20aa_intr_establish; pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; /* Not supported on KN20AA. */ pc->pc_pciide_compat_intr_establish = NULL; pc->pc_pciide_compat_intr_disestablish = NULL; kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); for (i = 0; i < KN20AA_MAX_IRQ; i++) alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, PCI_STRAY_MAX); #if NSIO sio_intr_setup(pc, iot); kn20aa_enable_intr(KN20AA_PCEB_IRQ); #endif } int dec_kn20aa_intr_map(pa, ihp) struct pci_attach_args *pa; pci_intr_handle_t *ihp; { pcitag_t bustag = pa->pa_intrtag; int buspin = pa->pa_intrpin; pci_chipset_tag_t pc = pa->pa_pc; int device; int kn20aa_irq; if (buspin == 0) { /* No IRQ used. */ return 1; } if (buspin > 4) { printf("pci_map_int: bad interrupt pin %d\n", buspin); return 1; } /* * Slot->interrupt translation. Appears to work, though it * may not hold up forever. * * The DEC engineers who did this hardware obviously engaged * in random drug testing. */ pci_decompose_tag(pc, bustag, NULL, &device, NULL); switch (device) { case 11: case 12: kn20aa_irq = ((device - 11) + 0) * 4; break; case 7: kn20aa_irq = 8; break; case 9: kn20aa_irq = 12; break; case 6: /* 21040 on AlphaStation 500 */ kn20aa_irq = 13; break; case 8: kn20aa_irq = 16; break; default: printf("dec_kn20aa_intr_map: weird device number %d\n", device); return 1; } kn20aa_irq += buspin - 1; if (kn20aa_irq > KN20AA_MAX_IRQ) panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)", kn20aa_irq); *ihp = kn20aa_irq; return (0); } const char * dec_kn20aa_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { static char irqstr[15]; /* 11 + 2 + NULL + sanity */ if (ih > KN20AA_MAX_IRQ) panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x", ih); snprintf(irqstr, sizeof irqstr, "kn20aa irq %ld", ih); return (irqstr); } int dec_kn20aa_intr_line(ccv, ih) void *ccv; pci_intr_handle_t ih; { return (ih); } void * dec_kn20aa_intr_establish(ccv, ih, level, func, arg, name) void *ccv, *arg; pci_intr_handle_t ih; int level; int (*func)(void *); char *name; { void *cookie; if (ih > KN20AA_MAX_IRQ) panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x", ih); cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, level, func, arg, name); if (cookie != NULL && alpha_shared_intr_firstactive(kn20aa_pci_intr, ih)) { scb_set(0x900 + SCB_IDXTOVEC(ih), kn20aa_iointr, NULL); kn20aa_enable_intr(ih); } return (cookie); } void dec_kn20aa_intr_disestablish(ccv, cookie) void *ccv, *cookie; { struct alpha_shared_intrhand *ih = cookie; unsigned int irq = ih->ih_num; int s; s = splhigh(); alpha_shared_intr_disestablish(kn20aa_pci_intr, cookie, "kn20aa irq"); if (alpha_shared_intr_isactive(kn20aa_pci_intr, irq) == 0) { kn20aa_disable_intr(irq); alpha_shared_intr_set_dfltsharetype(kn20aa_pci_intr, irq, IST_NONE); scb_free(0x900 + SCB_IDXTOVEC(irq)); } splx(s); } void kn20aa_iointr(arg, vec) void *arg; unsigned long vec; { int irq; irq = SCB_VECTOIDX(vec - 0x900); if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { alpha_shared_intr_stray(kn20aa_pci_intr, irq, "kn20aa irq"); if (ALPHA_SHARED_INTR_DISABLE(kn20aa_pci_intr, irq)) kn20aa_disable_intr(irq); } else alpha_shared_intr_reset_strays(kn20aa_pci_intr, irq); } void kn20aa_enable_intr(irq) int irq; { /* * From disassembling small bits of the OSF/1 kernel: * the following appears to enable a given interrupt request. * "blech." I'd give valuable body parts for better docs or * for a good decompiler. */ alpha_mb(); REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ alpha_mb(); } void kn20aa_disable_intr(irq) int irq; { alpha_mb(); REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ alpha_mb(); }