/* $NetBSD: pci_eb164.c,v 1.4 1996/11/25 03:47:05 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 #ifndef EVCNT_COUNTERS #include #endif #include "sio.h" #if NSIO #include #endif int dec_eb164_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *)); const char *dec_eb164_intr_string __P((void *, pci_intr_handle_t)); void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t, int, int (*func)(void *), void *)); void dec_eb164_intr_disestablish __P((void *, void *)); #define EB164_SIO_IRQ 4 #define EB164_MAX_IRQ 24 #define PCI_STRAY_MAX 5 struct alpha_shared_intr *eb164_pci_intr; #ifdef EVCNT_COUNTERS struct evcnt eb164_intr_evcnt; #endif bus_space_tag_t eb164_intrgate_iot; bus_space_handle_t eb164_intrgate_ioh; void eb164_iointr __P((void *framep, unsigned long vec)); extern void eb164_intr_enable __P((int irq)); /* pci_eb164_intr.S */ extern void eb164_intr_disable __P((int irq)); /* pci_eb164_intr.S */ void pci_eb164_pickintr(ccp) struct cia_config *ccp; { bus_space_tag_t iot = ccp->cc_iot; pci_chipset_tag_t pc = &ccp->cc_pc; int i; pc->pc_intr_v = ccp; pc->pc_intr_map = dec_eb164_intr_map; pc->pc_intr_string = dec_eb164_intr_string; pc->pc_intr_establish = dec_eb164_intr_establish; pc->pc_intr_disestablish = dec_eb164_intr_disestablish; eb164_intrgate_iot = iot; if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0, &eb164_intrgate_ioh) != 0) panic("pci_eb164_pickintr: couldn't map interrupt PLD"); for (i = 0; i < EB164_MAX_IRQ; i++) eb164_intr_disable(i); eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ); for (i = 0; i < EB164_MAX_IRQ; i++) alpha_shared_intr_set_maxstrays(eb164_pci_intr, i, PCI_STRAY_MAX); #if NSIO sio_intr_setup(iot); eb164_intr_enable(EB164_SIO_IRQ); #endif set_iointr(eb164_iointr); } int dec_eb164_intr_map(ccv, bustag, buspin, line, ihp) void *ccv; pcitag_t bustag; int buspin, line; pci_intr_handle_t *ihp; { struct cia_config *ccp = ccv; pci_chipset_tag_t pc = &ccp->cc_pc; int device; int eb164_irq, pinbase, pinoff; if (buspin == 0) { /* No IRQ used. */ return 1; } if (buspin > 4) { printf("pci_map_int: bad interrupt pin %d\n", buspin); return 1; } pci_decompose_tag(pc, bustag, NULL, &device, NULL); switch (device) { #if 0 /* THIS CODE SHOULD NEVER BE CALLED FOR THE SIO */ case 8: /* SIO */ eb164_irq = 4; break; #endif case 11: eb164_irq = 5; /* IDE */ break; case 5: case 6: case 7: case 9: switch (buspin) { case 1: pinbase = 0; break; case 2: case 3: case 4: pinbase = (buspin * 4) - 1; break; #ifdef DIAGNOSTIC default: panic("dec_eb164_intr_map: slot buspin switch"); #endif }; switch (device) { case 5: pinoff = 2; break; case 6: case 7: case 9: pinoff = device - 6; break; #ifdef DIAGNOSTIC default: panic("dec_eb164_intr_map: slot device switch"); #endif } eb164_irq = pinoff + pinbase; break; default: panic("pci_eb164_map_int: invalid device number %d\n", device); } if (eb164_irq > EB164_MAX_IRQ) panic("pci_eb164_map_int: eb164_irq too large (%d)\n", eb164_irq); *ihp = eb164_irq; return (0); } const char * dec_eb164_intr_string(ccv, ih) void *ccv; pci_intr_handle_t ih; { #if 0 struct cia_config *ccp = ccv; #endif static char irqstr[15]; /* 11 + 2 + NULL + sanity */ if (ih > EB164_MAX_IRQ) panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih); sprintf(irqstr, "eb164 irq %d", ih); return (irqstr); } void * dec_eb164_intr_establish(ccv, ih, level, func, arg) void *ccv, *arg; pci_intr_handle_t ih; int level; int (*func) __P((void *)); { #if 0 struct cia_config *ccp = ccv; #endif void *cookie; if (ih > EB164_MAX_IRQ) panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih); cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL, level, func, arg, "eb164 irq"); if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih)) eb164_intr_enable(ih); return (cookie); } void dec_eb164_intr_disestablish(ccv, cookie) void *ccv, *cookie; { #if 0 struct cia_config *ccp = ccv; #endif panic("dec_eb164_intr_disestablish not implemented"); /* XXX */ } void eb164_iointr(framep, vec) void *framep; unsigned long vec; { int irq; if (vec >= 0x900) { if (vec >= 0x900 + (EB164_MAX_IRQ << 4)) panic("eb164_iointr: vec 0x%x out of range\n", vec); irq = (vec - 0x900) >> 4; #ifdef EVCNT_COUNTERS eb164_intr_evcnt.ev_count++; #else if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN) panic("eb164 interrupt counter sizes inconsistent"); intrcnt[INTRCNT_EB164_IRQ + irq]++; #endif if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) { alpha_shared_intr_stray(eb164_pci_intr, irq, "eb164 irq"); if (eb164_pci_intr[irq].intr_nstrays == eb164_pci_intr[irq].intr_maxstrays) eb164_intr_disable(irq); } return; } #if NSIO if (vec >= 0x800) { sio_iointr(framep, vec); return; } #endif panic("eb164_iointr: weird vec 0x%x\n", vec); } #if 0 /* THIS DOES NOT WORK! see pci_eb164_intr.S. */ u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff }; void eb164_intr_enable(irq) int irq; { int byte = (irq / 8), bit = (irq % 8); #if 1 printf("eb164_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit); #endif eb164_intr_mask[byte] &= ~(1 << bit); bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, eb164_intr_mask[byte]); } void eb164_intr_disable(irq) int irq; { int byte = (irq / 8), bit = (irq % 8); #if 1 printf("eb164_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit); #endif eb164_intr_mask[byte] |= (1 << bit); bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, eb164_intr_mask[byte]); } #endif