65772aee92
Bug fixed, that caused system hang on first interrupt on some motherboards. New version of PCI bus configuration code, now supports dynamic interrupt configuration (using BIOS supplied values). NCR SCSI and DEC Ethernet driver patched to use this feature. *** Remove PCI IRQ specifications from your kernel config file ! ***
674 lines
15 KiB
C
674 lines
15 KiB
C
/**************************************************************************
|
||
**
|
||
** $Id: pci.c,v 2.12 94/10/11 22:20:37 wolf Oct11 $
|
||
**
|
||
** General subroutines for the PCI bus on 80*86 systems.
|
||
** pci_configure ()
|
||
**
|
||
** 386bsd / 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 <pci.h>
|
||
#if NPCI > 0
|
||
|
||
#ifndef __FreeBSD2__
|
||
#if __FreeBSD__ >= 2
|
||
#define __FreeBSD2__
|
||
#endif
|
||
#endif
|
||
|
||
/*========================================================
|
||
**
|
||
** #includes and declarations
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/systm.h>
|
||
#include <sys/malloc.h>
|
||
#include <sys/errno.h>
|
||
|
||
#include <vm/vm.h>
|
||
#include <vm/vm_param.h>
|
||
|
||
#include <i386/isa/isa.h>
|
||
#include <i386/isa/isa_device.h>
|
||
#include <i386/isa/icu.h>
|
||
#include <i386/pci/pcireg.h>
|
||
|
||
/*
|
||
** Function prototypes missing in system headers
|
||
*/
|
||
|
||
#ifndef __FreeBSD2__
|
||
extern pmap_t pmap_kernel(void);
|
||
static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize);
|
||
|
||
/*
|
||
* Type of the first (asm) part of an interrupt handler.
|
||
*/
|
||
typedef void inthand_t __P((u_int cs, u_int ef, u_int esp, u_int ss));
|
||
|
||
/*
|
||
* Usual type of the second (C) part of an interrupt handler. Some bogus
|
||
* ones need the arg to be the interrupt frame (and not a copy of it, which
|
||
* is all that is possible in C).
|
||
*/
|
||
typedef void inthand2_t __P((int unit));
|
||
|
||
/*
|
||
** XXX @FreeBSD2@
|
||
**
|
||
** Unfortunately, the mptr argument is _no_ pointer in 2.0 FreeBSD.
|
||
** We would prefer a pointer because it enables us to install
|
||
** new interrupt handlers at any time.
|
||
** In 2.0 FreeBSD later installed interrupt handlers may change
|
||
** the xyz_imask, but this would not be recognized by handlers
|
||
** which are installed before.
|
||
*/
|
||
|
||
static int
|
||
register_intr __P((int intr, int device_id, unsigned int flags,
|
||
inthand2_t *handler, unsigned int * mptr, int unit));
|
||
extern unsigned intr_mask[ICU_LEN];
|
||
|
||
#endif /* !__FreeBSD2__ */
|
||
|
||
/*========================================================
|
||
**
|
||
** Autoconfiguration of pci devices.
|
||
**
|
||
** This is reverse to the isa configuration.
|
||
** (1) find a pci device.
|
||
** (2) look for a driver.
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
/*--------------------------------------------------------
|
||
**
|
||
** The pci devices can be mapped to any address.
|
||
** As default we start at the last gigabyte.
|
||
**
|
||
**--------------------------------------------------------
|
||
*/
|
||
|
||
#ifndef PCI_PMEM_START
|
||
#define PCI_PMEM_START 0xc0000000
|
||
#endif
|
||
|
||
static vm_offset_t pci_paddr = PCI_PMEM_START;
|
||
|
||
/*--------------------------------------------------------
|
||
**
|
||
** The pci device interrupt lines should have been
|
||
** assigned by the bios. But if the bios failed to
|
||
** to it, we set it.
|
||
**
|
||
**--------------------------------------------------------
|
||
*/
|
||
|
||
#ifndef PCI_IRQ
|
||
#define PCI_IRQ 0
|
||
#endif
|
||
|
||
static u_long pci_irq = PCI_IRQ;
|
||
|
||
/*---------------------------------------------------------
|
||
**
|
||
** pci_configure ()
|
||
**
|
||
** Probe all devices on pci bus and attach them.
|
||
**
|
||
** May be called more than once.
|
||
** Any device is attached only once.
|
||
** (Attached devices are remembered in pci_seen.)
|
||
**
|
||
**---------------------------------------------------------
|
||
*/
|
||
|
||
static void not_supported (pcici_t tag, u_long type);
|
||
|
||
static unsigned long pci_seen[NPCI];
|
||
|
||
static int pci_conf_count;
|
||
|
||
void pci_configure()
|
||
{
|
||
u_char device,last_device;
|
||
u_short bus;
|
||
pcici_t tag;
|
||
pcidi_t type;
|
||
u_long data;
|
||
int unit;
|
||
int pci_mechanism;
|
||
int pciint;
|
||
int irq;
|
||
char* name=0;
|
||
int newdev=0;
|
||
|
||
struct pci_driver *drp=0;
|
||
struct pci_device *dvp;
|
||
|
||
/*
|
||
** check pci bus present
|
||
*/
|
||
|
||
pci_mechanism = pci_conf_mode ();
|
||
if (!pci_mechanism) return;
|
||
last_device = pci_mechanism==1 ? 31 : 15;
|
||
|
||
/*
|
||
** hello world ..
|
||
*/
|
||
|
||
|
||
for (bus=0;bus<NPCI;bus++) {
|
||
#ifndef PCI_QUIET
|
||
printf ("pci%d: scanning device 0..%d, mechanism=%d.\n",
|
||
bus, last_device, pci_mechanism);
|
||
#endif
|
||
for (device=0; device<=last_device; device ++) {
|
||
|
||
if (pci_seen[bus] & (1ul << device))
|
||
continue;
|
||
|
||
tag = pcitag (bus, device, 0);
|
||
type = pci_conf_read (tag, PCI_ID_REG);
|
||
|
||
if ((!type) || (type==0xfffffffful)) continue;
|
||
|
||
/*
|
||
** lookup device in ioconfiguration:
|
||
*/
|
||
|
||
for (dvp = pci_devtab; dvp->pd_name; dvp++) {
|
||
drp = dvp->pd_driver;
|
||
if (!drp)
|
||
continue;
|
||
if ((name=(*drp->probe)(tag, type)))
|
||
break;
|
||
};
|
||
|
||
if (!dvp->pd_name) {
|
||
#ifndef PCI_QUIET
|
||
if (pci_conf_count)
|
||
continue;
|
||
printf("pci%d:%d: ", bus, device);
|
||
not_supported (tag, type);
|
||
#endif
|
||
continue;
|
||
};
|
||
|
||
pci_seen[bus] |= (1ul << device);
|
||
/*
|
||
** Get and increment the unit.
|
||
*/
|
||
|
||
unit = (*drp->count)++;
|
||
|
||
/*
|
||
** ignore device ?
|
||
*/
|
||
|
||
if (!*name) continue;
|
||
|
||
/*
|
||
** Announce this device
|
||
*/
|
||
|
||
newdev++;
|
||
printf ("%s%d <%s>", dvp->pd_name, unit, name);
|
||
|
||
/*
|
||
** Get the int pin number (pci interrupt number a-d)
|
||
** from the pci configuration space.
|
||
*/
|
||
|
||
data = pci_conf_read (tag, PCI_INTERRUPT_REG);
|
||
pciint = PCI_INTERRUPT_PIN_EXTRACT(data);
|
||
|
||
if (pciint) {
|
||
|
||
printf (" int %c", 0x60+pciint);
|
||
|
||
/*
|
||
** If the interrupt line register is not set,
|
||
** set it now from PCI_IRQ.
|
||
*/
|
||
|
||
if (!(PCI_INTERRUPT_LINE_EXTRACT(data))) {
|
||
|
||
irq = pci_irq & 0x0f;
|
||
pci_irq >>= 4;
|
||
|
||
data = PCI_INTERRUPT_LINE_INSERT(data, irq);
|
||
printf (" (config)");
|
||
pci_conf_write (tag, PCI_INTERRUPT_REG, data);
|
||
};
|
||
|
||
irq = PCI_INTERRUPT_LINE_EXTRACT(data);
|
||
|
||
/*
|
||
** If it's zero, the isa irq number is unknown,
|
||
** and we cannot bind the pci interrupt to isa.
|
||
*/
|
||
|
||
if (irq)
|
||
printf (" irq %d", irq);
|
||
else
|
||
printf (" not bound");
|
||
};
|
||
|
||
/*
|
||
** enable memory access
|
||
*/
|
||
|
||
data = (pci_conf_read (tag, PCI_COMMAND_STATUS_REG)
|
||
& 0xffff) | PCI_COMMAND_MEM_ENABLE;
|
||
|
||
pci_conf_write (tag, (u_char) PCI_COMMAND_STATUS_REG, data);
|
||
|
||
/*
|
||
** attach device
|
||
** may produce additional log messages,
|
||
** i.e. when installing subdevices.
|
||
*/
|
||
|
||
printf (" on pci%d:%d\n", bus, device);
|
||
|
||
(*drp->attach) (tag, unit);
|
||
};
|
||
};
|
||
|
||
#ifndef PCI_QUIET
|
||
if (newdev)
|
||
printf ("pci uses physical addresses from 0x%lx to 0x%lx\n",
|
||
(u_long)PCI_PMEM_START, (u_long)pci_paddr);
|
||
#endif
|
||
pci_conf_count++;
|
||
}
|
||
|
||
/*-----------------------------------------------------------------------
|
||
**
|
||
** Map device into port space.
|
||
**
|
||
** PCI-Specification: 6.2.5.1: address maps
|
||
**
|
||
**-----------------------------------------------------------------------
|
||
*/
|
||
|
||
int pci_map_port (pcici_t tag, u_long reg, u_short* pa)
|
||
{
|
||
/*
|
||
** @MAPIO@ not yet implemented.
|
||
*/
|
||
printf ("pci_map_port failed: not yet implemented\n");
|
||
return (0);
|
||
}
|
||
|
||
/*-----------------------------------------------------------------------
|
||
**
|
||
** Map device into virtual and physical space
|
||
**
|
||
** PCI-Specification: 6.2.5.1: address maps
|
||
**
|
||
**-----------------------------------------------------------------------
|
||
*/
|
||
|
||
int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
|
||
{
|
||
u_long data;
|
||
vm_size_t vsize;
|
||
vm_offset_t vaddr;
|
||
|
||
/*
|
||
** sanity check
|
||
*/
|
||
|
||
if (reg < PCI_MAP_REG_START || reg >= PCI_MAP_REG_END || (reg & 3)) {
|
||
printf ("pci_map_mem failed: bad register=0x%x\n",
|
||
(unsigned)reg);
|
||
return (0);
|
||
};
|
||
|
||
/*
|
||
** get size and type of memory
|
||
**
|
||
** type is in the lowest four bits.
|
||
** If device requires 2^n bytes, the next
|
||
** n-4 bits are read as 0.
|
||
*/
|
||
|
||
pci_conf_write (tag, reg, 0xfffffffful);
|
||
data = pci_conf_read (tag, reg);
|
||
|
||
switch (data & 0x0f) {
|
||
|
||
case PCI_MAP_MEMORY_TYPE_32BIT: /* 32 bit non cachable */
|
||
break;
|
||
|
||
default: /* unknown */
|
||
printf ("pci_map_mem failed: bad memory type=0x%x\n",
|
||
(unsigned) data);
|
||
return (0);
|
||
};
|
||
|
||
/*
|
||
** mask out the type,
|
||
** and round up to a page size
|
||
*/
|
||
|
||
vsize = round_page (-(data & PCI_MAP_MEMORY_ADDRESS_MASK));
|
||
|
||
if (!vsize) return (0);
|
||
|
||
/*
|
||
** align physical address to virtual size
|
||
*/
|
||
|
||
if ((data = pci_paddr % vsize))
|
||
pci_paddr += vsize - data;
|
||
|
||
vaddr = (vm_offset_t) pmap_mapdev (pci_paddr, vsize);
|
||
|
||
|
||
if (!vaddr) return (0);
|
||
|
||
#ifndef PCI_QUIET
|
||
/*
|
||
** display values.
|
||
*/
|
||
|
||
printf ("\treg%d: virtual=0x%lx physical=0x%lx\n",
|
||
(unsigned) reg, (u_long)vaddr, (u_long)pci_paddr);
|
||
#endif
|
||
|
||
/*
|
||
** return them to the driver
|
||
*/
|
||
|
||
*va = vaddr;
|
||
*pa = pci_paddr;
|
||
|
||
/*
|
||
** set device address
|
||
*/
|
||
|
||
pci_conf_write (tag, reg, pci_paddr);
|
||
|
||
/*
|
||
** and don't forget to increment pci_paddr
|
||
*/
|
||
|
||
pci_paddr += vsize;
|
||
|
||
return (1);
|
||
}
|
||
|
||
/*-----------------------------------------------------------------------
|
||
**
|
||
** Map pci interrupts to isa interrupts.
|
||
**
|
||
**-----------------------------------------------------------------------
|
||
*/
|
||
|
||
static unsigned int pci_int_mask [16];
|
||
|
||
int pci_map_int (pcici_t tag, int(*func)(), void* arg, unsigned* maskptr)
|
||
{
|
||
int irq;
|
||
unsigned mask;
|
||
|
||
irq = PCI_INTERRUPT_LINE_EXTRACT(
|
||
pci_conf_read (tag, PCI_INTERRUPT_REG));
|
||
|
||
if (irq >= 16 || irq <= 0) {
|
||
printf ("pci_map_int failed: no int line set.\n");
|
||
return (0);
|
||
}
|
||
|
||
mask = 1ul << irq;
|
||
|
||
if (!maskptr)
|
||
maskptr = &pci_int_mask[irq];
|
||
|
||
INTRMASK (*maskptr, mask);
|
||
|
||
register_intr(
|
||
irq, /* isa irq */
|
||
0, /* deviced?? */
|
||
0, /* flags? */
|
||
(inthand2_t*) func, /* handler */
|
||
#ifdef __FreeBSD2__
|
||
*maskptr, /* mask */
|
||
#else
|
||
maskptr, /* mask pointer */
|
||
#endif
|
||
(int) arg); /* handler arg */
|
||
|
||
#ifdef __FreeBSD2__
|
||
/*
|
||
** XXX See comment at beginning of file.
|
||
**
|
||
** Have to update all the interrupt masks ... Grrrrr!!!
|
||
*/
|
||
{
|
||
unsigned * mp = &intr_mask[0];
|
||
/*
|
||
** update the isa interrupt masks.
|
||
*/
|
||
for (mp=&intr_mask[0]; mp<&intr_mask[ICU_LEN]; mp++)
|
||
if (*mp & *maskptr)
|
||
*mp |= mask;
|
||
/*
|
||
** update the pci interrupt masks.
|
||
*/
|
||
for (mp=&pci_int_mask[0]; mp<&pci_int_mask[16]; mp++)
|
||
if (*mp & *maskptr)
|
||
*mp |= mask;
|
||
};
|
||
#endif
|
||
|
||
INTREN (mask);
|
||
|
||
return (1);
|
||
}
|
||
|
||
/*-----------------------------------------------------------
|
||
**
|
||
** Display of unknown devices.
|
||
**
|
||
**-----------------------------------------------------------
|
||
*/
|
||
struct vt {
|
||
u_short ident;
|
||
char* name;
|
||
};
|
||
|
||
static struct vt VendorTable[] = {
|
||
{0x1002, "ATI TECHNOLOGIES INC"},
|
||
{0x1011, "DIGITAL EQUIPMENT CORPORATION"},
|
||
{0x101A, "NCR"},
|
||
{0x102B, "MATROX"},
|
||
{0x1045, "OPTI"},
|
||
{0x5333, "S3 INC."},
|
||
{0x8086, "INTEL CORPORATION"},
|
||
{0,0}
|
||
};
|
||
|
||
static const char *const majclasses[] = {
|
||
"old", "storage", "network", "display",
|
||
"multimedia", "memory", "bridge"
|
||
};
|
||
|
||
void not_supported (pcici_t tag, u_long type)
|
||
{
|
||
u_char reg;
|
||
u_long data;
|
||
struct vt * vp;
|
||
|
||
/*
|
||
** lookup the names.
|
||
*/
|
||
|
||
for (vp=VendorTable; vp->ident; vp++)
|
||
if (vp->ident == (type & 0xffff))
|
||
break;
|
||
|
||
/*
|
||
** and display them.
|
||
*/
|
||
|
||
if (vp->ident) printf (vp->name);
|
||
else printf ("vendor=0x%lx", type & 0xffff);
|
||
|
||
printf (", device=0x%lx", type >> 16);
|
||
|
||
data = (pci_conf_read(tag, PCI_CLASS_REG) >> 24) & 0xff;
|
||
if (data < sizeof(majclasses) / sizeof(majclasses[0]))
|
||
printf(", class=%s", majclasses[data]);
|
||
|
||
printf (" [not supported]\n");
|
||
|
||
for (reg=PCI_MAP_REG_START; reg<PCI_MAP_REG_END; reg+=4) {
|
||
data = pci_conf_read (tag, reg);
|
||
if (!data) continue;
|
||
switch (data&7) {
|
||
|
||
case 1:
|
||
case 5:
|
||
printf (" map(%x): io(%lx)\n",
|
||
reg, data & ~3);
|
||
break;
|
||
case 0:
|
||
printf (" map(%x): mem32(%lx)\n",
|
||
reg, data & ~7);
|
||
break;
|
||
case 2:
|
||
printf (" map(%x): mem20(%lx)\n",
|
||
reg, data & ~7);
|
||
break;
|
||
case 4:
|
||
printf (" map(%x): mem64(%lx)\n",
|
||
reg, data & ~7);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifndef __FreeBSD2__
|
||
/*-----------------------------------------------------------
|
||
**
|
||
** Mapping of physical to virtual memory
|
||
**
|
||
**-----------------------------------------------------------
|
||
*/
|
||
|
||
extern vm_map_t kernel_map;
|
||
|
||
static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize)
|
||
{
|
||
vm_offset_t vaddr,value;
|
||
u_long result;
|
||
|
||
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 */
|