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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:52 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:52 +0000 |
commit | ca67b09c015d4af3ae3cce12aa72e60941dbb8b5 (patch) | |
tree | b7316d7b06c373e08dabb79a2c866c568e08f49e /debian/grub-extras/disabled/gpxe/wrap/pci.c | |
parent | Adding upstream version 2.06. (diff) | |
download | grub2-debian/2.06-13+deb12u1.tar.xz grub2-debian/2.06-13+deb12u1.zip |
Adding debian version 2.06-13+deb12u1.debian/2.06-13+deb12u1debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/grub-extras/disabled/gpxe/wrap/pci.c')
-rw-r--r-- | debian/grub-extras/disabled/gpxe/wrap/pci.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/debian/grub-extras/disabled/gpxe/wrap/pci.c b/debian/grub-extras/disabled/gpxe/wrap/pci.c new file mode 100644 index 0000000..90b26c5 --- /dev/null +++ b/debian/grub-extras/disabled/gpxe/wrap/pci.c @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. + * + * Based in part on pci.c from Etherboot 5.4, by Ken Yap and David + * Munro, in turn based on the Linux kernel's PCI implementation. + * + * This program 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 2 of the + * License, or any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <gpxe/tables.h> +#include <gpxe/device.h> +#include <gpxe/pci.h> + +/** + * Enable PCI device + * + * @v pci PCI device + * + * Set device to be a busmaster in case BIOS neglected to do so. Also + * adjust PCI latency timer to a reasonable value, 32. + */ +void adjust_pci_device ( struct pci_device *pci ) { + unsigned short new_command, pci_command; + unsigned char pci_latency; + + pci_read_config_word ( pci, PCI_COMMAND, &pci_command ); + new_command = ( pci_command | PCI_COMMAND_MASTER | + PCI_COMMAND_MEM | PCI_COMMAND_IO ); + if ( pci_command != new_command ) { + pci_write_config_word ( pci, PCI_COMMAND, new_command ); + } + + pci_read_config_byte ( pci, PCI_LATENCY_TIMER, &pci_latency); + if ( pci_latency < 32 ) { + pci_write_config_byte ( pci, PCI_LATENCY_TIMER, 32); + } +} |