374 lines
9.5 KiB
C
374 lines
9.5 KiB
C
/* $NetBSD: tc.c,v 1.8 1996/01/29 22:52:44 jonathan Exp $ */
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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Jonathan Stone
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#define TC_DEBUG /* until decstatn autoconfig works with dev/tc/tc.c*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <dev/cons.h>
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#include <dev/tc/tcvar.h>
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#include <machine/autoconf.h>
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/* Which TC framebuffers have drivers, for configuring a console device. */
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#include <cfb.h>
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#include <mfb.h>
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#include <sfb.h>
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extern int pmax_boardtype;
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/*
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* Old-style model-specific autoconfiguration description.
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*/
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struct tcbus_attach_args {
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u_int tca_nslots;
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struct tc_slotdesc *tca_slots;
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u_int tca_nbuiltins;
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const struct tc_builtin *tca_builtins;
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void (*tca_intr_establish) __P((struct device *dev, void *cookie,
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tc_intrlevel_t level,
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intr_handler_t handler,
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void *arg));
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void (*tca_intr_disestablish) __P((struct device *, void *));
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};
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/* Return the appropriate tc_attach_args for a given cputype */
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extern struct tc_attach_args * cpu_tcdesc __P ((int cputype));
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/* Definition of the driver for autoconfig. */
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int tcmatch(struct device *, void *, void *);
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void tcattach(struct device *, struct device *, void *);
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int tcprint(void *, char *);
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void tc_ds_intr_establish __P((struct device *, void *, tc_intrlevel_t,
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intr_handler_t handler, intr_arg_t arg));
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void tc_intr_disestablish __P((struct device *dev, void *cookie));
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caddr_t tc_cvtaddr __P((struct confargs *));
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extern int cputype;
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extern int tc_findconsole __P((int prom_slot));
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/* Forward declarations */
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int consprobeslot __P((int slot));
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/*
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* TurboChannel autoconfiguration declarations and tables for DECstations.
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*/
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#include <machine/machConst.h>
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#include <pmax/pmax/pmaxtype.h>
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#include <pmax/pmax/trap.h>
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#include <pmax/pmax/asic.h>
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#include <pmax/pmax/kn03.h>
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#include <pmax/pmax/kn02.h>
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#include <pmax/pmax/kmin.h>
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#include <pmax/pmax/maxine.h>
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#include <pmax/pmax/turbochannel.h>
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/*#include <pmax/pmax/nameglue.h>*/
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#define KV(x) ((tc_addr_t)MACH_PHYS_TO_UNCACHED(x))
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void tc_ds_ioasic_intr_setup __P((void));
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void tc_ds_ioasic_intr_establish __P((struct device *dev, void *cookie,
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tc_intrlevel_t level,
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intr_handler_t handler,
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void *arg));
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void tc_ds_ioasic_intr_disestablish __P((struct device *, void *));
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void tc_ds_ioasic_iointr __P((void *, int));
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int tc_ds_ioasic_getdev __P((struct confargs *));
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/* XXX*/
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/* should be handled elsewhere? */
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typedef void (*tc_enable_t) __P ((u_int slotno, intr_handler_t,
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void *intr_arg, int on));
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typedef int (*tc_handler_t) __P((void *intr_arg));
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extern void (*tc_enable_interrupt) __P ((u_int slotno, tc_handler_t,
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void *intr_arg, int on));
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extern void kn03_enable_intr __P((u_int slot, tc_handler_t,
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void *intr_arg, int on));
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extern void kn02_enable_intr __P ((u_int slot, tc_handler_t,
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void *intr_arg, int on));
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extern void kmin_enable_intr __P ((u_int slot, tc_handler_t,
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void *intr_arg, int on));
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extern void xine_enable_intr __P ((u_int slot, tc_handler_t,
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void *intr_arg, int on));
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/*
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* Configuration tables for the four models of
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* Decstation that have turbochannels.
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* None of the four are the same.
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*/
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#include "ds-tc-conf.c"
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/*
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* Function to map from a CPU code to a tcbus tc_attach_args struct.
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* This should really be in machine-dependent code, where
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* it could even be a macro.
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*/
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struct tc_attach_args *
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cpu_tcdesc(cpu)
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int cpu;
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{
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if (cpu == DS_3MAXPLUS) {
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tc_enable_interrupt = kn03_enable_intr;
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return &kn03_tc_desc;
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} else if (cpu == DS_3MAX) {
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tc_enable_interrupt = kn02_enable_intr;
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return &kn02_tc_desc;
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} else if (cpu == DS_3MIN) {
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tc_enable_interrupt = kmin_enable_intr;
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return &kmin_tc_desc;
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} else if (cpu == DS_MAXINE) {
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tc_enable_interrupt = xine_enable_intr;
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return &xine_tc_desc;
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} else if (cpu == DS_PMAX) {
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#ifdef DIAGNOSTIC
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printf("tcattach: PMAX, no turbochannel\n");
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#endif
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return NULL;
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} else if (cpu == DS_MIPSFAIR) {
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printf("tcattach: Mipsfair (5100), no turbochannel\n");
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return NULL;
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} else {
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panic("cpu_tc: Unrecognized bus type 0x%x\n", cpu);
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}
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}
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/*
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* We have a TurboChannel bus. Configure it.
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*/
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void
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config_tcbus(parent, cputype, printfn)
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struct device *parent;
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int cputype;
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int printfn __P((void *, char *));
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{
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struct tc_attach_args tc;
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struct tc_attach_args * tcbus = cpu_tcdesc(pmax_boardtype);
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/*
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* Set up important CPU/chipset information.
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*/
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tc.tca_nslots = tcbus->tca_nslots;
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tc.tca_slots = tcbus->tca_slots;
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tc.tca_nbuiltins = tcbus->tca_nbuiltins;
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tc.tca_builtins = tcbus->tca_builtins;
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tc.tca_intr_establish = tc_ds_intr_establish; /*XXX*/
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tc.tca_intr_disestablish = tc_ds_ioasic_intr_disestablish; /*XXX*/
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config_found(parent, (struct confargs*)&tc, printfn);
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}
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/*
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* Probe the turbochannel for a framebuffer option card, starting
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* at the preferred slot and then scanning all slots. Configure the first
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* supported framebuffer device found, if any, as the console, and return
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* 1 if found.
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* Called before autoconfiguration, to find a system console.
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*/
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int
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tc_findconsole(preferred_slot)
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int preferred_slot;
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{
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int slot;
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struct tc_attach_args * sc_desc;
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/* First, try the slot configured as console in NVRAM. */
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/* if (consprobeslot(preferred_slot)) return (1); */
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/*
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* Try to configure each turbochannel (or CPU-internal) device.
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* Knows about gross internals of TurboChannel bus autoconfig
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* descriptor, which needs to be fixed badly.
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*/
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if ((sc_desc = cpu_tcdesc(pmax_boardtype)) == NULL)
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return 0;
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for (slot = 0; slot < sc_desc->tca_nslots; slot++) {
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if (tc_consprobeslot(slot))
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return (1);
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}
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return (0);
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}
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/*
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* Try and configure one slot as framebuffer console.
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* Accept only the framebuffers for which driver are configured into
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* the kernel. If a suitable framebuffer is found, attach it and
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* set up glass-tty emulation.
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*/
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int
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tc_consprobeslot(slot)
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int slot;
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{
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void *slotaddr;
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char name[20];
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struct tc_attach_args * sc_desc;
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if (slot < 0 || ((sc_desc = cpu_tcdesc(pmax_boardtype)) == NULL))
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return 0;
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slotaddr = (void *)(sc_desc->tca_slots[slot].tcs_addr);
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if (tc_badaddr(slotaddr))
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return (0);
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if (tc_checkslot(slotaddr, name) == 0)
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return (0);
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/*
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* We found an device in the given slot. Now see if it's a
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* framebuffer for which we have a driver.
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*/
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/*printf(", trying to init a \"%s\"", name);*/
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#define DRIVER_FOR_SLOT(slotname, drivername) \
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(strcmp (slotname, drivername) == 0)
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#if NMFB > 0
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if (DRIVER_FOR_SLOT(name, "PMAG-AA ") &&
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mfbinit(slotaddr, 0, 1)) {
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return (1);
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}
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#endif /* NMFB */
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#if NSFB > 0
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if (DRIVER_FOR_SLOT(name, "PMAGB-BA") &&
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sfbinit(slotaddr, 0, 1)) {
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return (1);
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}
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#endif /* NSFB */
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#if NCFB > 0
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/*"cfb"*/
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if (DRIVER_FOR_SLOT(name, "PMAG-BA ") &&
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cfbinit(NULL, slotaddr, 0, 1)) {
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return (1);
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}
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#endif /* NCFB */
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return (0);
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}
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/*
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* Estabish an interrupt handler, but on what bus -- TC or ioctl asic?
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*/
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void
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tc_ds_intr_establish(dev, cookie, level, handler, val)
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struct device *dev;
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void *cookie;
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tc_intrlevel_t level;
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intr_handler_t handler;
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void *val;
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{
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/* Never tested on these processors */
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if (cputype == DS_3MIN || cputype == DS_MAXINE)
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printf("tc_enable %s sc %x slot %d\n",
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dev->dv_xname, (int)val, cookie);
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#ifdef DIAGNOSTIC
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if (tc_enable_interrupt == NULL)
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panic("tc_intr_establish: tc_enable not set\n");
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#endif
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#ifdef DEBUG
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printf("tc_intr_establish: slot %d level %d handler %p sc %p on\n",
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(int) cookie, (int) level, handler, val);
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#endif
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/*
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* Enable the interrupt from tc (or ioctl asic) slot with NetBSD/pmax
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* sw-convention name ``cookie'' on this CPU.
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* XXX store the level somewhere for selective enabling of
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* interrupts from TC option slots.
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*/
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(*tc_enable_interrupt) ((int)cookie, handler, val, 1);
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}
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/* hack for kn03 ioasic */
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void
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tc_ds_ioasic_intr_setup ()
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{
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printf("not setting up TC intrs\n");
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}
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/*
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* establish an interrupt handler for an ioasic device.
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* On NetBSD/pmax, there is currently a single, merged interrupt handler for
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* both TC and ioasic. Just use the tc interrupt-establish function.
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*/
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void
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tc_ds_ioasic_intr_establish(dev, cookie, level, handler, val)
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struct device *dev;
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void *cookie;
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tc_intrlevel_t level;
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intr_handler_t handler;
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void *val;
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{
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tc_intr_establish(dev, cookie, level, handler, val);
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}
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void
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tc_ds_ioasic_intr_disestablish(dev, arg)
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struct device *dev;
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void *arg;
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{
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/*(*tc_enable_interrupt) (ca->ca_slot, handler, 0);*/
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printf("cannot dis-establish IOASIC interrupts\n");
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}
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void
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tc_ds_ioasic_iointr (framep, vec)
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void * framep;
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int vec;
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{
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printf("bogus interrupt handler fp %x vec %d\n", framep, vec);
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}
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/* XXX */
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#include <dev/tc/tc.c>
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