mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
526 lines
12 KiB
C
526 lines
12 KiB
C
/**************************************************************************
|
|
**
|
|
** $Id: pcibus.c,v 1.21 1995/12/16 00:27:59 bde Exp $
|
|
**
|
|
** pci bus subroutines for i386 architecture.
|
|
**
|
|
** FreeBSD
|
|
**
|
|
**-------------------------------------------------------------------------
|
|
**
|
|
** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**
|
|
***************************************************************************
|
|
*/
|
|
|
|
#include "vector.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <machine/cpu.h> /* bootverbose */
|
|
|
|
#include <i386/isa/icu.h>
|
|
#include <i386/isa/isa.h>
|
|
#include <i386/isa/isa_device.h>
|
|
|
|
#include <pci/pcivar.h>
|
|
#include <pci/pcireg.h>
|
|
#include <pci/pcibus.h>
|
|
|
|
/*-----------------------------------------------------------------
|
|
**
|
|
** The following functions are provided by the pci bios.
|
|
** They are used only by the pci configuration.
|
|
**
|
|
** pcibus_setup():
|
|
** Probes for a pci system.
|
|
** Sets pci_maxdevice and pci_mechanism.
|
|
**
|
|
** pcibus_tag():
|
|
** Creates a handle for pci configuration space access.
|
|
** This handle is given to the read/write functions.
|
|
**
|
|
** pcibus_ftag():
|
|
** Creates a modified handle.
|
|
**
|
|
** pcibus_read():
|
|
** Read a long word from the pci configuration space.
|
|
** Requires a tag (from pcitag) and the register
|
|
** number (should be a long word alligned one).
|
|
**
|
|
** pcibus_write():
|
|
** Writes a long word to the pci configuration space.
|
|
** Requires a tag (from pcitag), the register number
|
|
** (should be a long word alligned one), and a value.
|
|
**
|
|
** pcibus_regirq():
|
|
** Register an interupt handler for a pci device.
|
|
** Requires a tag (from pcitag), the register number
|
|
** (should be a long word alligned one), and a value.
|
|
**
|
|
**-----------------------------------------------------------------
|
|
*/
|
|
|
|
static int
|
|
pcibus_check (void);
|
|
|
|
static void
|
|
pcibus_setup (void);
|
|
|
|
static pcici_t
|
|
pcibus_tag (u_char bus, u_char device, u_char func);
|
|
|
|
static pcici_t
|
|
pcibus_ftag (pcici_t tag, u_char func);
|
|
|
|
static u_long
|
|
pcibus_read (pcici_t tag, u_long reg);
|
|
|
|
static void
|
|
pcibus_write (pcici_t tag, u_long reg, u_long data);
|
|
|
|
static int
|
|
pcibus_ihandler_attach (int irq, inthand2_t *func, int arg, unsigned* maskptr);
|
|
|
|
static int
|
|
pcibus_ihandler_detach (int irq, inthand2_t *func);
|
|
|
|
static int
|
|
pcibus_imask_include (int irq, unsigned* maskptr);
|
|
|
|
static int
|
|
pcibus_imask_exclude (int irq, unsigned* maskptr);
|
|
|
|
static struct pcibus i386pci = {
|
|
"pci",
|
|
pcibus_setup,
|
|
pcibus_tag,
|
|
pcibus_ftag,
|
|
pcibus_read,
|
|
pcibus_write,
|
|
ICU_LEN,
|
|
pcibus_ihandler_attach,
|
|
pcibus_ihandler_detach,
|
|
pcibus_imask_include,
|
|
pcibus_imask_exclude,
|
|
};
|
|
|
|
/*
|
|
** Announce structure to generic driver
|
|
*/
|
|
|
|
DATA_SET (pcibus_set, i386pci);
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Determine configuration mode
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
|
|
#define CONF1_ADDR_PORT 0x0cf8
|
|
#define CONF1_DATA_PORT 0x0cfc
|
|
|
|
#define CONF1_ENABLE 0x80000000ul
|
|
#define CONF1_ENABLE_CHK 0x80000000ul
|
|
#define CONF1_ENABLE_MSK 0x00ff0700ul
|
|
#define CONF1_ENABLE_CHK1 0xff000001ul
|
|
#define CONF1_ENABLE_MSK1 0x80000001ul
|
|
#define CONF1_ENABLE_RES1 0x80000000ul
|
|
|
|
#define CONF2_ENABLE_PORT 0x0cf8
|
|
#define CONF2_FORWARD_PORT 0x0cfa
|
|
|
|
#define CONF2_ENABLE_CHK 0x0e
|
|
#define CONF2_ENABLE_RES 0x0e
|
|
|
|
static int
|
|
pcibus_check (void)
|
|
{
|
|
u_char device;
|
|
|
|
if (bootverbose) printf ("pcibus_check:\tdevice ");
|
|
|
|
for (device = 0; device < pci_maxdevice; device++) {
|
|
unsigned long id;
|
|
if (bootverbose)
|
|
printf ("%d ", device);
|
|
id = pcibus_read (pcibus_tag (0,device,0), 0);
|
|
if (id != 0xfffffffful) {
|
|
if (bootverbose) printf ("is there (id=%08lx)\n", id);
|
|
return 1;
|
|
}
|
|
}
|
|
if (bootverbose)
|
|
printf ("-- nothing found\n");
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
pcibus_setup (void)
|
|
{
|
|
unsigned long mode1res,oldval1;
|
|
unsigned char mode2res,oldval2;
|
|
|
|
oldval1 = inl (CONF1_ADDR_PORT);
|
|
|
|
if (bootverbose) {
|
|
printf ("pcibus_setup(1):\tmode 1 addr port (0x0cf8) is 0x%08lx\n", oldval1);
|
|
}
|
|
|
|
/*---------------------------------------
|
|
** Assume configuration mechanism 1 for now ...
|
|
**---------------------------------------
|
|
*/
|
|
|
|
if ((oldval1 & CONF1_ENABLE_MSK) == 0) {
|
|
|
|
pci_mechanism = 1;
|
|
pci_maxdevice = 32;
|
|
|
|
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
|
|
outb (CONF1_ADDR_PORT +3, 0);
|
|
mode1res = inl (CONF1_ADDR_PORT);
|
|
outl (CONF1_ADDR_PORT, oldval1);
|
|
|
|
if (bootverbose)
|
|
printf ("pcibus_setup(1a):\tmode1res=0x%08lx (0x%08lx)\n",
|
|
mode1res, CONF1_ENABLE_CHK);
|
|
|
|
if (mode1res) {
|
|
if (pcibus_check())
|
|
return;
|
|
};
|
|
|
|
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
|
|
mode1res = inl(CONF1_ADDR_PORT);
|
|
outl (CONF1_ADDR_PORT, oldval1);
|
|
|
|
if (bootverbose)
|
|
printf ("pcibus_setup(1b):\tmode1res=0x%08lx (0x%08lx)\n",
|
|
mode1res, CONF1_ENABLE_CHK1);
|
|
|
|
if ((mode1res & CONF1_ENABLE_MSK1) == CONF1_ENABLE_RES1) {
|
|
if (pcibus_check())
|
|
return;
|
|
};
|
|
}
|
|
|
|
/*---------------------------------------
|
|
** Try configuration mechanism 2 ...
|
|
**---------------------------------------
|
|
*/
|
|
|
|
oldval2 = inb (CONF2_ENABLE_PORT);
|
|
|
|
if (bootverbose) {
|
|
printf ("pcibus_setup(2):\tmode 2 enable port (0x0cf8) is 0x%02x\n", oldval2);
|
|
}
|
|
|
|
if ((oldval2 & 0xf0) == 0) {
|
|
|
|
pci_mechanism = 2;
|
|
pci_maxdevice = 16;
|
|
|
|
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
|
|
mode2res = inb(CONF2_ENABLE_PORT);
|
|
outb (CONF2_ENABLE_PORT, oldval2);
|
|
|
|
if (bootverbose)
|
|
printf ("pcibus_setup(2a):\tmode2res=0x%02x (0x%02x)\n",
|
|
mode2res, CONF2_ENABLE_CHK);
|
|
|
|
if (mode2res == CONF2_ENABLE_RES) {
|
|
if (bootverbose)
|
|
printf ("pcibus_setup(2a):\tnow trying mechanism 2\n");
|
|
|
|
if (pcibus_check())
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------
|
|
** No PCI bus host bridge found
|
|
**---------------------------------------
|
|
*/
|
|
|
|
pci_mechanism = 0;
|
|
pci_maxdevice = 0;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Build a pcitag from bus, device and function number
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
static pcici_t
|
|
pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
|
|
{
|
|
pcici_t tag;
|
|
|
|
tag.cfg1 = 0;
|
|
if (func >= 8) return tag;
|
|
|
|
switch (pci_mechanism) {
|
|
|
|
case 1:
|
|
if (device < 32) {
|
|
tag.cfg1 = CONF1_ENABLE
|
|
| (((u_long) bus ) << 16ul)
|
|
| (((u_long) device) << 11ul)
|
|
| (((u_long) func ) << 8ul);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (device < 16) {
|
|
tag.cfg2.port = 0xc000 | (device << 8ul);
|
|
tag.cfg2.enable = 0xf0 | (func << 1ul);
|
|
tag.cfg2.forward = bus;
|
|
}
|
|
break;
|
|
};
|
|
return tag;
|
|
}
|
|
|
|
static pcici_t
|
|
pcibus_ftag (pcici_t tag, u_char func)
|
|
{
|
|
switch (pci_mechanism) {
|
|
|
|
case 1:
|
|
tag.cfg1 &= ~0x700ul;
|
|
tag.cfg1 |= (((u_long) func) << 8ul);
|
|
break;
|
|
case 2:
|
|
tag.cfg2.enable = 0xf0 | (func << 1ul);
|
|
break;
|
|
};
|
|
return tag;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Read register from configuration space.
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
static u_long
|
|
pcibus_read (pcici_t tag, u_long reg)
|
|
{
|
|
u_long addr, data = 0;
|
|
|
|
if (!tag.cfg1) return (0xfffffffful);
|
|
|
|
switch (pci_mechanism) {
|
|
|
|
case 1:
|
|
addr = tag.cfg1 | (reg & 0xfc);
|
|
#ifdef PCI_DEBUG
|
|
printf ("pci_conf_read(1): addr=%x ", addr);
|
|
#endif
|
|
outl (CONF1_ADDR_PORT, addr);
|
|
data = inl (CONF1_DATA_PORT);
|
|
outl (CONF1_ADDR_PORT, 0 );
|
|
break;
|
|
|
|
case 2:
|
|
addr = tag.cfg2.port | (reg & 0xfc);
|
|
#ifdef PCI_DEBUG
|
|
printf ("pci_conf_read(2): addr=%x ", addr);
|
|
#endif
|
|
outb (CONF2_ENABLE_PORT , tag.cfg2.enable );
|
|
outb (CONF2_FORWARD_PORT, tag.cfg2.forward);
|
|
|
|
data = inl ((u_short) addr);
|
|
|
|
outb (CONF2_ENABLE_PORT, 0);
|
|
outb (CONF2_FORWARD_PORT, 0);
|
|
break;
|
|
};
|
|
|
|
#ifdef PCI_DEBUG
|
|
printf ("data=%x\n", data);
|
|
#endif
|
|
|
|
return (data);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------
|
|
**
|
|
** Write register into configuration space.
|
|
**
|
|
**--------------------------------------------------------------------
|
|
*/
|
|
|
|
static void
|
|
pcibus_write (pcici_t tag, u_long reg, u_long data)
|
|
{
|
|
u_long addr;
|
|
|
|
if (!tag.cfg1) return;
|
|
|
|
switch (pci_mechanism) {
|
|
|
|
case 1:
|
|
addr = tag.cfg1 | (reg & 0xfc);
|
|
#ifdef PCI_DEBUG
|
|
printf ("pci_conf_write(1): addr=%x data=%x\n",
|
|
addr, data);
|
|
#endif
|
|
outl (CONF1_ADDR_PORT, addr);
|
|
outl (CONF1_DATA_PORT, data);
|
|
outl (CONF1_ADDR_PORT, 0 );
|
|
break;
|
|
|
|
case 2:
|
|
addr = tag.cfg2.port | (reg & 0xfc);
|
|
#ifdef PCI_DEBUG
|
|
printf ("pci_conf_write(2): addr=%x data=%x\n",
|
|
addr, data);
|
|
#endif
|
|
outb (CONF2_ENABLE_PORT, tag.cfg2.enable);
|
|
outb (CONF2_FORWARD_PORT, tag.cfg2.forward);
|
|
|
|
outl ((u_short) addr, data);
|
|
|
|
outb (CONF2_ENABLE_PORT, 0);
|
|
outb (CONF2_FORWARD_PORT, 0);
|
|
break;
|
|
};
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------
|
|
**
|
|
** Register an interupt handler for a pci device.
|
|
**
|
|
**-----------------------------------------------------------------------
|
|
*/
|
|
|
|
static int
|
|
pcibus_ihandler_attach (int irq, inthand2_t *func, int arg, unsigned * maskptr)
|
|
{
|
|
char buf[16];
|
|
char *cp;
|
|
int free_id, id, result;
|
|
|
|
sprintf(buf, "pci irq%d", irq);
|
|
for (cp = intrnames, free_id = 0, id = 0; id < NR_DEVICES; id++) {
|
|
if (strcmp(cp, buf) == 0)
|
|
break;
|
|
if (free_id <= 0 && strcmp(cp, "pci irqnn") == 0)
|
|
free_id = id;
|
|
while (*cp++ != '\0')
|
|
;
|
|
}
|
|
if (id == NR_DEVICES) {
|
|
id = free_id;
|
|
if (id == 0) {
|
|
/*
|
|
* All pci irq counters are in use, perhaps because
|
|
* config is old so there aren't any. Abuse the
|
|
* clk0 counter.
|
|
*/
|
|
printf (
|
|
"pcibus_ihandler_attach: counting pci irq%d's as clk0 irqs\n",
|
|
irq);
|
|
}
|
|
}
|
|
result = register_intr(
|
|
irq, /* isa irq */
|
|
id, /* device id */
|
|
0, /* flags? */
|
|
func, /* handler */
|
|
maskptr, /* mask pointer */
|
|
arg); /* handler arg */
|
|
|
|
if (result) {
|
|
printf ("@@@ pcibus_ihandler_attach: result=%d\n", result);
|
|
return (result);
|
|
};
|
|
update_intr_masks();
|
|
|
|
INTREN ((1ul<<irq));
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcibus_ihandler_detach (int irq, inthand2_t *func)
|
|
{
|
|
int result;
|
|
|
|
INTRDIS ((1ul<<irq));
|
|
|
|
result = unregister_intr (irq, func);
|
|
|
|
if (result)
|
|
printf ("@@@ pcibus_ihandler_detach: result=%d\n", result);
|
|
|
|
update_intr_masks();
|
|
|
|
return (result);
|
|
}
|
|
|
|
static int
|
|
pcibus_imask_include (int irq, unsigned* maskptr)
|
|
{
|
|
unsigned mask;
|
|
|
|
if (!maskptr) return (0);
|
|
|
|
mask = 1ul << irq;
|
|
|
|
if (*maskptr & mask)
|
|
return (-1);
|
|
|
|
INTRMASK (*maskptr, mask);
|
|
update_intr_masks();
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcibus_imask_exclude (int irq, unsigned* maskptr)
|
|
{
|
|
unsigned mask;
|
|
|
|
if (!maskptr) return (0);
|
|
|
|
mask = 1ul << irq;
|
|
|
|
if (! (*maskptr & mask))
|
|
return (-1);
|
|
|
|
*maskptr &= ~mask;
|
|
update_intr_masks();
|
|
|
|
return (0);
|
|
}
|