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500 lines
11 KiB
C
500 lines
11 KiB
C
/**************************************************************************
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**
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** $Id: pcibus.c,v 1.5 1995/03/21 23:06:07 se Exp $
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**
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** pci bus subroutines for i386 architecture.
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**
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** 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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#define __PCIBUS_C___ "pl4 95/03/21"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <i386/isa/icu.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 <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <pci/pcibus.h>
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#ifdef DENTARO
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#define SFAKE (32)
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static void
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dec21050 (u_int*reg) {
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reg[0] = 0x00011011;
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reg[1]&= 0x000001e7;
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reg[2] = 0x06040001;
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reg[3]&= 0x0000f8ff;
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reg[3]|= 0x000100ff;
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reg[4] = 0x00000000;
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reg[5] = 0x00000000;
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reg[6]&= 0xf8ffffff;
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reg[7]&= 0x0000f0f0; /* io-limit */
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reg[8]&= 0xfff0fff0; /* mem-limit, non prefatchable */
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reg[9]&= 0xfff0fff0; /* mem-limit, prefetchable memory */
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reg[10] = 0x00000000;
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reg[11] = 0x00000000;
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reg[12] = 0x00000000;
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reg[13] = 0x00000000;
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reg[14] = 0x00000000;
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reg[15]&= 0x00ef0000;
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}
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static void
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dec21140 (u_int*reg) {
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reg[0] = 0x00091011u;
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reg[4]&= 0xfffffffdu;
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reg[4]|= 0x00000001u;
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reg[5]&= 0xffffff00u;
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}
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struct fake {
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u_int tag;
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void (*proc)(u_int*);
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};
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struct fake faketable [] = {
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{ 0xc70000f1, dec21050 },
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{ 0xc00001f1, dec21140 },
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{ 0xc40001f1, dec21140 },
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{ 0xc80001f1, dec21140 },
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{ 0xcc0001f1, dec21140 },
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};
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#define NFAKE (sizeof faketable / sizeof (struct fake))
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static u_int fakedata[NFAKE * SFAKE];
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u_int* findfake (pcici_t tag)
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{
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u_int *p;
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int i;
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for (i=0; i<NFAKE; i++)
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if (faketable[i].tag == tag.tag)
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break;
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if (i>=NFAKE)
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return (0);
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p = &fakedata[i*SFAKE];
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(*faketable[i].proc)(p);
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return (p);
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}
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#endif /*DENTARO*/
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/*-----------------------------------------------------------------
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**
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** The following functions are provided by the pci bios.
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** They are used only by the pci configuration.
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**
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** pcibus_setup():
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** Probes for a pci system.
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** Sets pci_maxdevice and pci_mechanism.
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**
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** pcibus_tag():
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** Creates a handle for pci configuration space access.
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** This handle is given to the read/write functions.
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**
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** pcibus_ftag():
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** Creates a modified handle.
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**
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** pcibus_read():
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** Read a long word from the pci configuration space.
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** Requires a tag (from pcitag) and the register
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** number (should be a long word alligned one).
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**
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** pcibus_write():
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** Writes a long word to the pci configuration space.
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** Requires a tag (from pcitag), the register number
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** (should be a long word alligned one), and a value.
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**
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** pcibus_regirq():
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** Register an interupt handler for a pci device.
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** Requires a tag (from pcitag), the register number
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** (should be a long word alligned one), and a value.
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**
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**-----------------------------------------------------------------
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*/
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static void
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pcibus_setup (void);
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static pcici_t
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pcibus_tag (u_char bus, u_char device, u_char func);
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static pcici_t
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pcibus_ftag (pcici_t tag, u_char func);
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static u_long
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pcibus_read (pcici_t tag, u_long reg);
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static void
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pcibus_write (pcici_t tag, u_long reg, u_long data);
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static int
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pcibus_ihandler_attach (int irq, void(*ihandler)(), int arg, unsigned* maskp);
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static int
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pcibus_ihandler_detach (int irq, void(*handler)());
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static int
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pcibus_imask_include (int irq, unsigned* maskptr);
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static int
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pcibus_imask_exclude (int irq, unsigned* maskptr);
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struct pcibus i386pci = {
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"pci",
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pcibus_setup,
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pcibus_tag,
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pcibus_ftag,
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pcibus_read,
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pcibus_write,
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ICU_LEN,
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pcibus_ihandler_attach,
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pcibus_ihandler_detach,
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pcibus_imask_include,
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pcibus_imask_exclude,
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};
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/*
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** Announce structure to generic driver
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*/
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DATA_SET (pcibus_set, i386pci);
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/*--------------------------------------------------------------------
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**
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** Determine configuration mode
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**
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**--------------------------------------------------------------------
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*/
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#define CONF1_ENABLE 0x80000000ul
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#define CONF1_ADDR_PORT 0x0cf8
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#define CONF1_DATA_PORT 0x0cfc
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#define CONF2_ENABLE_PORT 0x0cf8
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#define CONF2_FORWARD_PORT 0x0cfa
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static void
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pcibus_setup (void)
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{
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u_long result, oldval;
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/*---------------------------------------
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** Configuration mode 2 ?
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**---------------------------------------
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*/
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outb (CONF2_ENABLE_PORT, 0);
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outb (CONF2_FORWARD_PORT, 0);
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if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
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pci_mechanism = 2;
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pci_maxdevice = 16;
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};
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/*---------------------------------------
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** Configuration mode 1 ?
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**---------------------------------------
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*/
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oldval = inl (CONF1_ADDR_PORT);
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outl (CONF1_ADDR_PORT, CONF1_ENABLE);
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result = inl (CONF1_ADDR_PORT);
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outl (CONF1_ADDR_PORT, oldval);
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if (result == CONF1_ENABLE) {
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pci_mechanism = 1;
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pci_maxdevice = 32;
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};
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/*---------------------------------------
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** No PCI bus available.
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**---------------------------------------
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*/
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}
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/*--------------------------------------------------------------------
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**
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** Build a pcitag from bus, device and function number
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**
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**--------------------------------------------------------------------
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*/
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static pcici_t
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pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
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{
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pcici_t tag;
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tag.cfg1 = 0;
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if (device >= 32) return tag;
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if (func >= 8) return tag;
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switch (pci_mechanism) {
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case 1:
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tag.cfg1 = CONF1_ENABLE
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| (((u_long) bus ) << 16ul)
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| (((u_long) device) << 11ul)
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| (((u_long) func ) << 8ul);
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break;
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case 2:
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if (device >= 16) break;
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tag.cfg2.port = 0xc000 | (device << 8ul);
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tag.cfg2.enable = 0xf1 | (func << 1ul);
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tag.cfg2.forward = bus;
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break;
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};
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return tag;
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}
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static pcici_t
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pcibus_ftag (pcici_t tag, u_char func)
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{
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switch (pci_mechanism) {
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case 1:
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tag.cfg1 &= ~0x700ul;
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tag.cfg1 |= (((u_long) func) << 8ul);
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break;
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case 2:
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tag.cfg2.enable = 0xf1 | (func << 1ul);
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break;
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};
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return tag;
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}
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/*--------------------------------------------------------------------
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**
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** Read register from configuration space.
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**
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**--------------------------------------------------------------------
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*/
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static u_long
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pcibus_read (pcici_t tag, u_long reg)
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{
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u_long addr, data = 0;
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#ifdef DENTARO
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u_int*p = findfake(tag);
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if (p) {
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#if 0
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printf ("fake conf_read (tag=%x reg=%d val=%08x).\n",
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tag.tag, (unsigned) reg, (unsigned) p[reg/4]);
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#endif
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return (p[reg/4]);
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}
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#endif
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if (!tag.cfg1) return (0xfffffffful);
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switch (pci_mechanism) {
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case 1:
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addr = tag.cfg1 | (reg & 0xfc);
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#ifdef PCI_DEBUG
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printf ("pci_conf_read(1): addr=%x ", addr);
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#endif
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outl (CONF1_ADDR_PORT, addr);
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data = inl (CONF1_DATA_PORT);
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outl (CONF1_ADDR_PORT, 0 );
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break;
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case 2:
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addr = tag.cfg2.port | (reg & 0xfc);
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#ifdef PCI_DEBUG
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printf ("pci_conf_read(2): addr=%x ", addr);
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#endif
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outb (CONF2_ENABLE_PORT , tag.cfg2.enable );
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outb (CONF2_FORWARD_PORT, tag.cfg2.forward);
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data = inl ((u_short) addr);
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outb (CONF2_ENABLE_PORT, 0);
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outb (CONF2_FORWARD_PORT, 0);
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break;
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};
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#ifdef PCI_DEBUG
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printf ("data=%x\n", data);
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#endif
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return (data);
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}
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/*--------------------------------------------------------------------
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**
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** Write register into configuration space.
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**
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**--------------------------------------------------------------------
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*/
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static void
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pcibus_write (pcici_t tag, u_long reg, u_long data)
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{
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u_long addr;
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#ifdef DENTARO
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u_int*p = findfake(tag);
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if (p) {
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#if 0
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printf ("fake conf_write (tag=%x reg=%d val=%08x).\n",
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tag.tag, (unsigned) reg, (unsigned) data);
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#endif
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p[reg/4]=data;
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return;
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}
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#endif
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if (!tag.cfg1) return;
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switch (pci_mechanism) {
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case 1:
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addr = tag.cfg1 | (reg & 0xfc);
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#ifdef PCI_DEBUG
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printf ("pci_conf_write(1): addr=%x data=%x\n",
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addr, data);
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#endif
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outl (CONF1_ADDR_PORT, addr);
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outl (CONF1_DATA_PORT, data);
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outl (CONF1_ADDR_PORT, 0 );
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break;
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case 2:
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addr = tag.cfg2.port | (reg & 0xfc);
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#ifdef PCI_DEBUG
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printf ("pci_conf_write(2): addr=%x data=%x\n",
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addr, data);
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#endif
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outb (CONF2_ENABLE_PORT, tag.cfg2.enable);
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outb (CONF2_FORWARD_PORT, tag.cfg2.forward);
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outl ((u_short) addr, data);
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outb (CONF2_ENABLE_PORT, 0);
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outb (CONF2_FORWARD_PORT, 0);
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break;
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};
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}
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/*-----------------------------------------------------------------------
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**
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** Register an interupt handler for a pci device.
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**
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**-----------------------------------------------------------------------
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*/
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static int
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pcibus_ihandler_attach (int irq, void(*func)(), int arg, unsigned * maskptr)
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{
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int result;
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result = 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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arg); /* handler arg */
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if (result) {
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printf ("@@@ pcibus_ihandler_attach: result=%d\n", result);
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return (result);
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};
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update_intr_masks();
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INTREN ((1ul<<irq));
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return (0);
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}
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static int
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pcibus_ihandler_detach (int irq, void(*func)())
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{
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int result;
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INTRDIS ((1ul<<irq));
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result = unregister_intr (irq, (inthand2_t*) func);
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if (result)
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printf ("@@@ pcibus_ihandler_detach: result=%d\n", result);
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update_intr_masks();
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return (result);
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}
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static int
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pcibus_imask_include (int irq, unsigned* maskptr)
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{
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unsigned mask;
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if (!maskptr) return (0);
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mask = 1ul << irq;
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if (*maskptr & mask)
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return (-1);
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INTRMASK (*maskptr, mask);
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update_intr_masks();
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return (0);
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}
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static int
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pcibus_imask_exclude (int irq, unsigned* maskptr)
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{
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unsigned mask;
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if (!maskptr) return (0);
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mask = 1ul << irq;
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if (! (*maskptr & mask))
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return (-1);
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*maskptr &= ~mask;
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update_intr_masks();
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return (0);
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}
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