Another try to determine the PCI bus configuration mode (and whether

there is a PCI bus at all) ...

- Do not expect the chip sets to follow even very clearly expressed
  requirements of the PCI 2.0 spec.
- Do not read back the value just written to an I/O port without making
  sure that some other data have crossed the bus in between ...
This commit is contained in:
Stefan Eßer 1995-09-15 21:43:45 +00:00
parent ef7728f9c8
commit 2d14418625
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=10807
6 changed files with 240 additions and 354 deletions

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;

View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pcibus.c,v 1.11 1995/09/13 17:03:47 se Exp $
** $Id: pcibus.c,v 1.12 1995/09/14 20:27:31 se Exp $
**
** pci bus subroutines for i386 architecture.
**
@ -41,6 +41,8 @@
#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>
@ -83,9 +85,6 @@
**-----------------------------------------------------------------
*/
static int
pcibus_check (void);
static void
pcibus_setup (void);
@ -141,29 +140,23 @@ DATA_SET (pcibus_set, i386pci);
*/
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK1 0xF0000000ul
#define CONF1_ENABLE_CHK2 0xfffffffful
#define CONF1_ENABLE_RES2 0x80fffffcul
#define CONF1_ADDR_PORT 0x0cf8
#define CONF1_DATA_PORT 0x0cfc
#define CONF1_ENABLE 0x80000000ul
#define CONF1_ENABLE_CHK 0x80000001ul
#define CONF1_ENABLE_MSK 0x80000001ul
#define CONF1_ENABLE_RES 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;
for (device = 0; device < pci_maxdevice; device++) {
if (pcibus_read (pcibus_tag (0,device,0), 0) != 0xfffffffful)
return 1;
}
return 0;
}
static void
pcibus_setup (void)
@ -176,16 +169,20 @@ pcibus_setup (void)
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK1);
outb (CONF1_ADDR_PORT +3, 0);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK);
outl (CONF1_DATA_PORT, 0);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result & CONF1_ENABLE) {
if (bootverbose && (result != 0xfffffffful))
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK, result, CONF1_ENABLE_RES);
if ((result & CONF1_ENABLE_MSK) == CONF1_ENABLE_RES) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
return;
};
/*---------------------------------------
@ -193,37 +190,19 @@ pcibus_setup (void)
**---------------------------------------
*/
outb (CONF2_ENABLE_PORT, 0);
outb (CONF2_ENABLE_PORT, CONF2_ENABLE_CHK);
outb (CONF2_FORWARD_PORT, 0);
if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) {
result = inb (CONF2_ENABLE_PORT);
outb (CONF2_ENABLE_PORT, 0);
if ((result == CONF2_ENABLE_RES)
&& !inb (CONF2_ENABLE_PORT)
&& !inb (CONF2_FORWARD_PORT)) {
pci_mechanism = 2;
pci_maxdevice = 16;
if (pcibus_check())
return;
return;
};
/*-----------------------------------------------------
** Well, is it Configuration mode 1, after all ?
**-----------------------------------------------------
*/
oldval = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK2);
result = inl (CONF1_ADDR_PORT);
outl (CONF1_ADDR_PORT, oldval);
if (result == CONF1_ENABLE_RES2) {
pci_mechanism = 1;
pci_maxdevice = 32;
if (pcibus_check())
return;
}
if (result != 0xfffffffful)
printf ("pcibus_setup: "
"wrote 0x%08x, read back 0x%08x, expected 0x%08x\n",
CONF1_ENABLE_CHK2, result, CONF1_ENABLE_RES2);
/*---------------------------------------
** No PCI bus host bridge found
**---------------------------------------
@ -246,22 +225,24 @@ pcibus_tag (unsigned char bus, unsigned char device, unsigned char func)
pcici_t tag;
tag.cfg1 = 0;
if (device >= 32) return tag;
if (func >= 8) return tag;
switch (pci_mechanism) {
case 1:
tag.cfg1 = CONF1_ENABLE
| (((u_long) bus ) << 16ul)
| (((u_long) device) << 11ul)
| (((u_long) func ) << 8ul);
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) break;
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.forward = bus;
if (device < 16) {
tag.cfg2.port = 0xc000 | (device << 8ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
tag.cfg2.forward = bus;
}
break;
};
return tag;
@ -277,7 +258,7 @@ pcibus_ftag (pcici_t tag, u_char func)
tag.cfg1 |= (((u_long) func) << 8ul);
break;
case 2:
tag.cfg2.enable = 0xf1 | (func << 1ul);
tag.cfg2.enable = 0xf0 | (func << 1ul);
break;
};
return tag;