671 lines
15 KiB
C
671 lines
15 KiB
C
/**************************************************************************
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**
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** $Id: pci.c,v 1.7 1994/10/12 02:33:21 se Exp $
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**
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** General subroutines for the PCI bus on 80*86 systems.
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** pci_configure ()
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**
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** 386bsd / FreeBSD
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**
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**-------------------------------------------------------------------------
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**
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** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**
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***************************************************************************
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*/
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#include <pci.h>
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#if NPCI > 0
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#ifndef __FreeBSD2__
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#if __FreeBSD__ >= 2
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#define __FreeBSD2__
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#endif
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#endif
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/*========================================================
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**
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** #includes and declarations
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**
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**========================================================
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/icu.h>
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#include <i386/pci/pcireg.h>
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/*
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** Function prototypes missing in system headers
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*/
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#ifndef __FreeBSD2__
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extern pmap_t pmap_kernel(void);
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static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize);
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/*
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* Type of the first (asm) part of an interrupt handler.
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*/
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typedef void inthand_t __P((u_int cs, u_int ef, u_int esp, u_int ss));
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/*
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* Usual type of the second (C) part of an interrupt handler. Some bogus
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* ones need the arg to be the interrupt frame (and not a copy of it, which
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* is all that is possible in C).
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*/
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typedef void inthand2_t __P((int unit));
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/*
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** XXX @FreeBSD2@
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**
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** Unfortunately, the mptr argument is _no_ pointer in 2.0 FreeBSD.
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** We would prefer a pointer because it enables us to install
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** new interrupt handlers at any time.
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** (This is just going to be changed ... <se> :)
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** In 2.0 FreeBSD later installed interrupt handlers may change
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** the xyz_imask, but this would not be recognized by handlers
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** which are installed before.
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*/
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static int
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register_intr __P((int intr, int device_id, unsigned int flags,
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inthand2_t *handler, unsigned int * mptr, int unit));
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extern unsigned intr_mask[ICU_LEN];
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#endif /* !__FreeBSD2__ */
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/*========================================================
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**
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** Autoconfiguration of pci devices.
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**
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** This is reverse to the isa configuration.
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** (1) find a pci device.
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** (2) look for a driver.
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**
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**========================================================
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*/
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/*--------------------------------------------------------
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**
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** The pci devices can be mapped to any address.
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** As default we start at the last gigabyte.
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**
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**--------------------------------------------------------
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*/
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#ifndef PCI_PMEM_START
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#define PCI_PMEM_START 0xc0000000
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#endif
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static vm_offset_t pci_paddr = PCI_PMEM_START;
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/*--------------------------------------------------------
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**
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** The pci device interrupt lines should have been
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** assigned by the bios. But if the bios failed to
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** to it, we set it.
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**
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**--------------------------------------------------------
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*/
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#ifndef PCI_IRQ
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#define PCI_IRQ 0
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#endif
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static u_long pci_irq = PCI_IRQ;
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/*---------------------------------------------------------
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**
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** pci_configure ()
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**
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** Probe all devices on pci bus and attach them.
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**
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** May be called more than once.
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** Any device is attached only once.
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** (Attached devices are remembered in pci_seen.)
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**
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**---------------------------------------------------------
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*/
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static void not_supported (pcici_t tag, u_long type);
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static unsigned long pci_seen[NPCI];
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static int pci_conf_count;
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void pci_configure()
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{
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u_char device,last_device;
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u_short bus;
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pcici_t tag;
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pcidi_t type;
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u_long data;
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int unit;
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int pci_mechanism;
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int pciint;
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int irq;
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char* name=0;
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int newdev=0;
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struct pci_driver *drp=0;
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struct pci_device *dvp;
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/*
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** check pci bus present
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*/
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pci_mechanism = pci_conf_mode ();
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if (!pci_mechanism) return;
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last_device = pci_mechanism==1 ? 31 : 15;
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/*
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** hello world ..
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*/
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for (bus=0;bus<NPCI;bus++) {
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#ifndef PCI_QUIET
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printf ("pci%d: scanning device 0..%d, mechanism=%d.\n",
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bus, last_device, pci_mechanism);
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#endif
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for (device=0; device<=last_device; device ++) {
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if (pci_seen[bus] & (1ul << device))
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continue;
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tag = pcitag (bus, device, 0);
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type = pci_conf_read (tag, PCI_ID_REG);
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if ((!type) || (type==0xfffffffful)) continue;
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/*
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** lookup device in ioconfiguration:
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*/
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for (dvp = pci_devtab; dvp->pd_name; dvp++) {
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drp = dvp->pd_driver;
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if (!drp)
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continue;
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if ((name=(*drp->probe)(tag, type)))
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break;
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};
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if (!dvp->pd_name) {
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#ifndef PCI_QUIET
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if (pci_conf_count)
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continue;
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printf("pci%d:%d: ", bus, device);
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not_supported (tag, type);
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#endif
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continue;
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};
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pci_seen[bus] |= (1ul << device);
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/*
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** Get and increment the unit.
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*/
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unit = (*drp->count)++;
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/*
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** ignore device ?
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*/
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if (!*name) continue;
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/*
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** Announce this device
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*/
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newdev++;
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printf ("%s%d <%s>", dvp->pd_name, unit, name);
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/*
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** Get the int pin number (pci interrupt number a-d)
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** from the pci configuration space.
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*/
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data = pci_conf_read (tag, PCI_INTERRUPT_REG);
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pciint = PCI_INTERRUPT_PIN_EXTRACT(data);
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if (pciint) {
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printf (" int %c", 0x60+pciint);
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/*
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** If the interrupt line register is not set,
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** set it now from PCI_IRQ.
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*/
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if (!(PCI_INTERRUPT_LINE_EXTRACT(data))) {
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irq = pci_irq & 0x0f;
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pci_irq >>= 4;
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data = PCI_INTERRUPT_LINE_INSERT(data, irq);
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printf (" (config)");
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pci_conf_write (tag, PCI_INTERRUPT_REG, data);
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};
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irq = PCI_INTERRUPT_LINE_EXTRACT(data);
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/*
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** If it's zero, the isa irq number is unknown,
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** and we cannot bind the pci interrupt to isa.
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*/
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if (irq)
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printf (" irq %d", irq);
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else
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printf (" not bound");
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};
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/*
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** enable memory access
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*/
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data = (pci_conf_read (tag, PCI_COMMAND_STATUS_REG)
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& 0xffff) | PCI_COMMAND_MEM_ENABLE;
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pci_conf_write (tag, (u_char) PCI_COMMAND_STATUS_REG, data);
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/*
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** attach device
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** may produce additional log messages,
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** i.e. when installing subdevices.
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*/
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printf (" on pci%d:%d\n", bus, device);
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(*drp->attach) (tag, unit);
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};
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};
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#ifndef PCI_QUIET
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if (newdev)
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printf ("pci uses physical addresses from 0x%lx to 0x%lx\n",
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(u_long)PCI_PMEM_START, (u_long)pci_paddr);
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#endif
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pci_conf_count++;
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}
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/*-----------------------------------------------------------------------
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**
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** Map device into port space.
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**
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** PCI-Specification: 6.2.5.1: address maps
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**
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**-----------------------------------------------------------------------
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*/
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int pci_map_port (pcici_t tag, u_long reg, u_short* pa)
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{
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/*
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** @MAPIO@ not yet implemented.
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*/
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printf ("pci_map_port failed: not yet implemented\n");
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return (0);
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}
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/*-----------------------------------------------------------------------
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**
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** Map device into virtual and physical space
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**
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** PCI-Specification: 6.2.5.1: address maps
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**
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**-----------------------------------------------------------------------
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*/
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int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
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{
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u_long data;
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vm_size_t vsize;
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vm_offset_t vaddr;
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/*
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** sanity check
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*/
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if (reg < PCI_MAP_REG_START || reg >= PCI_MAP_REG_END || (reg & 3)) {
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printf ("pci_map_mem failed: bad register=0x%x\n",
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(unsigned)reg);
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return (0);
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};
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/*
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** get size and type of memory
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**
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** type is in the lowest four bits.
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** If device requires 2^n bytes, the next
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** n-4 bits are read as 0.
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*/
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pci_conf_write (tag, reg, 0xfffffffful);
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data = pci_conf_read (tag, reg);
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switch (data & 0x0f) {
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case PCI_MAP_MEMORY_TYPE_32BIT: /* 32 bit non cachable */
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break;
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default: /* unknown */
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printf ("pci_map_mem failed: bad memory type=0x%x\n",
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(unsigned) data);
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return (0);
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};
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/*
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** mask out the type,
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** and round up to a page size
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*/
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vsize = round_page (-(data & PCI_MAP_MEMORY_ADDRESS_MASK));
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if (!vsize) return (0);
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/*
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** align physical address to virtual size
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*/
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if ((data = pci_paddr % vsize))
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pci_paddr += vsize - data;
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vaddr = (vm_offset_t) pmap_mapdev (pci_paddr, vsize);
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if (!vaddr) return (0);
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#ifndef PCI_QUIET
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/*
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** display values.
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*/
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printf ("\treg%d: virtual=0x%lx physical=0x%lx\n",
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(unsigned) reg, (u_long)vaddr, (u_long)pci_paddr);
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#endif
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/*
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** return them to the driver
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*/
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*va = vaddr;
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*pa = pci_paddr;
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/*
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** set device address
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*/
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pci_conf_write (tag, reg, pci_paddr);
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/*
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** and don't forget to increment pci_paddr
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*/
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pci_paddr += vsize;
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return (1);
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}
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/*-----------------------------------------------------------------------
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**
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** Map pci interrupts to isa interrupts.
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**
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**-----------------------------------------------------------------------
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*/
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static unsigned int pci_int_mask [16];
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int pci_map_int (pcici_t tag, int(*func)(), void* arg, unsigned* maskptr)
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{
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int irq;
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unsigned mask;
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irq = PCI_INTERRUPT_LINE_EXTRACT(
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pci_conf_read (tag, PCI_INTERRUPT_REG));
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if (irq >= 16 || irq <= 0) {
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printf ("pci_map_int failed: no int line set.\n");
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return (0);
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}
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mask = 1ul << irq;
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if (!maskptr)
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maskptr = &pci_int_mask[irq];
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INTRMASK (*maskptr, mask);
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register_intr(
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irq, /* isa irq */
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0, /* deviced?? */
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0, /* flags? */
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(inthand2_t*) func, /* handler */
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maskptr, /* mask pointer */
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(int) arg); /* handler arg */
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#ifdef __FreeBSD2__
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/*
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** XXX See comment at beginning of file.
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**
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** Have to update all the interrupt masks ... Grrrrr!!!
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*/
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{
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unsigned * mp = &intr_mask[0];
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/*
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** update the isa interrupt masks.
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*/
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for (mp=&intr_mask[0]; mp<&intr_mask[ICU_LEN]; mp++)
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if (*mp & *maskptr)
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*mp |= mask;
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/*
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** update the pci interrupt masks.
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*/
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for (mp=&pci_int_mask[0]; mp<&pci_int_mask[16]; mp++)
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if (*mp & *maskptr)
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*mp |= mask;
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};
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#endif
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INTREN (mask);
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return (1);
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}
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/*-----------------------------------------------------------
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**
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** Display of unknown devices.
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**
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**-----------------------------------------------------------
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*/
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struct vt {
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u_short ident;
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char* name;
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};
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static struct vt VendorTable[] = {
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{0x1002, "ATI TECHNOLOGIES INC"},
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{0x1011, "DIGITAL EQUIPMENT CORPORATION"},
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{0x101A, "NCR"},
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{0x102B, "MATROX"},
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{0x1045, "OPTI"},
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{0x5333, "S3 INC."},
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{0x8086, "INTEL CORPORATION"},
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{0,0}
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};
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static const char *const majclasses[] = {
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"old", "storage", "network", "display",
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"multimedia", "memory", "bridge"
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};
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void not_supported (pcici_t tag, u_long type)
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{
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u_char reg;
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u_long data;
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struct vt * vp;
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/*
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** lookup the names.
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*/
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for (vp=VendorTable; vp->ident; vp++)
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if (vp->ident == (type & 0xffff))
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break;
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/*
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** and display them.
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*/
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if (vp->ident) printf (vp->name);
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else printf ("vendor=0x%lx", type & 0xffff);
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printf (", device=0x%lx", type >> 16);
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data = (pci_conf_read(tag, PCI_CLASS_REG) >> 24) & 0xff;
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if (data < sizeof(majclasses) / sizeof(majclasses[0]))
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printf(", class=%s", majclasses[data]);
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printf (" [not supported]\n");
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for (reg=PCI_MAP_REG_START; reg<PCI_MAP_REG_END; reg+=4) {
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data = pci_conf_read (tag, reg);
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if (!data) continue;
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switch (data&7) {
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case 1:
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case 5:
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printf (" map(%x): io(%lx)\n",
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reg, data & ~3);
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break;
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case 0:
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printf (" map(%x): mem32(%lx)\n",
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reg, data & ~7);
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break;
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case 2:
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printf (" map(%x): mem20(%lx)\n",
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reg, data & ~7);
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break;
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case 4:
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printf (" map(%x): mem64(%lx)\n",
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reg, data & ~7);
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break;
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}
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}
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}
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#ifndef __FreeBSD2__
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/*-----------------------------------------------------------
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**
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** Mapping of physical to virtual memory
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**
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**-----------------------------------------------------------
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*/
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extern vm_map_t kernel_map;
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static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize)
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{
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vm_offset_t vaddr,value;
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u_long result;
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|
||
vaddr = vm_map_min (kernel_map);
|
||
|
||
result = vm_map_find (kernel_map, (void*)0, (vm_offset_t) 0,
|
||
&vaddr, vsize, TRUE);
|
||
|
||
if (result != KERN_SUCCESS) {
|
||
printf (" vm_map_find failed(%d)\n", result);
|
||
return (0);
|
||
};
|
||
|
||
/*
|
||
** map physical
|
||
*/
|
||
|
||
value = vaddr;
|
||
while (vsize >= NBPG) {
|
||
pmap_enter (pmap_kernel(), vaddr, paddr,
|
||
VM_PROT_READ|VM_PROT_WRITE, TRUE);
|
||
vaddr += NBPG;
|
||
paddr += NBPG;
|
||
vsize -= NBPG;
|
||
};
|
||
return (value);
|
||
}
|
||
|
||
/*------------------------------------------------------------
|
||
**
|
||
** Emulate the register_intr() function of FreeBSD 2.0
|
||
**
|
||
** requires a patch:
|
||
** FreeBSD 2.0: "/sys/i386/isa/vector.s"
|
||
** 386bsd0.1: "/sys/i386/isa/icu.s"
|
||
** 386bsd1.0: Please ask Jesus Monroy Jr.
|
||
**
|
||
**------------------------------------------------------------
|
||
*/
|
||
|
||
#include <machine/segments.h>
|
||
|
||
int pci_int_unit [16];
|
||
inthand2_t* (pci_int_hdlr [16]);
|
||
unsigned int * pci_int_mptr [16];
|
||
unsigned int pci_int_count[16];
|
||
|
||
extern void
|
||
Vpci3(), Vpci4(), Vpci5(), Vpci6(), Vpci7(), Vpci8(), Vpci9(),
|
||
Vpci10(), Vpci11(), Vpci12(), Vpci13(), Vpci14(), Vpci15();
|
||
|
||
static inthand_t* pci_int_glue[16] = {
|
||
0, 0, 0, Vpci3, Vpci4, Vpci5, Vpci6, Vpci7, Vpci8,
|
||
Vpci9, Vpci10, Vpci11, Vpci12, Vpci13, Vpci14, Vpci15 };
|
||
|
||
static int
|
||
register_intr __P((int intr, int device_id, unsigned int flags,
|
||
inthand2_t *handler, unsigned int* mptr, int unit))
|
||
{
|
||
if (intr >= 16 || intr <= 2)
|
||
return (EINVAL);
|
||
if (pci_int_hdlr [intr])
|
||
return (EBUSY);
|
||
|
||
pci_int_hdlr [intr] = handler;
|
||
pci_int_unit [intr] = unit;
|
||
pci_int_mptr [intr] = mptr;
|
||
|
||
setidt(NRSVIDT + intr, pci_int_glue[intr], SDT_SYS386IGT, SEL_KPL);
|
||
return (0);
|
||
}
|
||
#endif /* __FreeBSD2__ */
|
||
#endif /* NPCI */
|