diff options
| author | se <se@FreeBSD.org> | 1995-06-28 15:54:57 +0000 |
|---|---|---|
| committer | se <se@FreeBSD.org> | 1995-06-28 15:54:57 +0000 |
| commit | 09eec57f6a02549eec5c5b77356100d67f458782 (patch) | |
| tree | 69231591e4a2aee425279d85666d17137bd96865 /sys/i386/isa | |
| parent | f3e714fb0e06ef49be7acbdf7e202c84c2d78b1d (diff) | |
| download | FreeBSD-src-09eec57f6a02549eec5c5b77356100d67f458782.zip FreeBSD-src-09eec57f6a02549eec5c5b77356100d67f458782.tar.gz | |
PCI configuration mechanism now determined by a method, that doesn't
fail on new hardware (Compaq Prolinea and Compaq Prosignea), and that
doesn't erroneously identify old mech. 2 chip sets as using mech. 1.
(See section 3.6.4.1.1 of the PCI bus specs rev. 2.0)
Diffstat (limited to 'sys/i386/isa')
| -rw-r--r-- | sys/i386/isa/pcibus.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/sys/i386/isa/pcibus.c b/sys/i386/isa/pcibus.c index 7fbb80f..d2a2ad9 100644 --- a/sys/i386/isa/pcibus.c +++ b/sys/i386/isa/pcibus.c @@ -1,6 +1,6 @@ /************************************************************************** ** -** $Id: pcibus.c,v 1.7 1995/03/22 19:51:59 se Exp $ +** $Id: pcibus.c,v 1.8 1995/03/22 21:35:39 se Exp $ ** ** pci bus subroutines for i386 architecture. ** @@ -139,6 +139,7 @@ DATA_SET (pcibus_set, i386pci); #define CONF1_ENABLE 0x80000000ul +#define CONF1_ENABLE_CHK 0xF0000000ul #define CONF1_ADDR_PORT 0x0cf8 #define CONF1_DATA_PORT 0x0cfc @@ -153,25 +154,13 @@ pcibus_setup (void) u_long result, oldval; /*--------------------------------------- - ** Configuration mode 2 ? - **--------------------------------------- - */ - - outb (CONF2_ENABLE_PORT, 0); - outb (CONF2_FORWARD_PORT, 0); - if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) { - pci_mechanism = 2; - pci_maxdevice = 16; - return; - }; - - /*--------------------------------------- ** Configuration mode 1 ? **--------------------------------------- */ oldval = inl (CONF1_ADDR_PORT); - outl (CONF1_ADDR_PORT, CONF1_ENABLE); + outl (CONF1_ADDR_PORT, CONF1_ENABLE_CHK); + outb (CONF1_ADDR_PORT +3, 0); result = inl (CONF1_ADDR_PORT); outl (CONF1_ADDR_PORT, oldval); @@ -182,6 +171,19 @@ pcibus_setup (void) }; /*--------------------------------------- + ** Configuration mode 2 ? + **--------------------------------------- + */ + + outb (CONF2_ENABLE_PORT, 0); + outb (CONF2_FORWARD_PORT, 0); + if (!inb (CONF2_ENABLE_PORT) && !inb (CONF2_FORWARD_PORT)) { + pci_mechanism = 2; + pci_maxdevice = 16; + return; + }; + + /*--------------------------------------- ** No PCI bus available. **--------------------------------------- */ |
