57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
|
/* pci.c - Generic PCI interfaces. */
|
||
|
|
/*
|
||
|
|
* GRUB -- GRand Unified Bootloader
|
||
|
|
* Copyright (C) 2007 Free Software Foundation, Inc.
|
||
|
|
*
|
||
|
|
* GRUB is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* GRUB is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <grub/dl.h>
|
||
|
|
#include <grub/pci.h>
|
||
|
|
|
||
|
|
grub_pci_address_t
|
||
|
|
grub_pci_make_address (int bus, int device, int function, int reg)
|
||
|
|
{
|
||
|
|
return (1 << 31) | (bus << 16) | (device << 11) | (function << 8) | (reg << 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
grub_pci_iterate (grub_pci_iteratefunc_t hook)
|
||
|
|
{
|
||
|
|
int bus;
|
||
|
|
int dev;
|
||
|
|
int func;
|
||
|
|
grub_pci_address_t addr;
|
||
|
|
grub_pci_id_t id;
|
||
|
|
|
||
|
|
for (bus = 0; bus < 256; bus++)
|
||
|
|
{
|
||
|
|
for (dev = 0; dev < 32; dev++)
|
||
|
|
{
|
||
|
|
for (func = 0; func < 3; func++)
|
||
|
|
{
|
||
|
|
addr = grub_pci_make_address (bus, dev, func, 0);
|
||
|
|
id = grub_pci_read (addr);
|
||
|
|
|
||
|
|
/* Check if there is a device present. */
|
||
|
|
if (id >> 16 == 0xFFFF)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (hook (bus, dev, func, id))
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|