compat.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:2k
- /*
- * $Id: compat.c,v 1.1 1998/02/16 10:35:50 mj Exp $
- *
- * PCI Bus Services -- Function For Backward Compatibility
- *
- * Copyright 1998--2000 Martin Mares <mj@ucw.cz>
- */
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/pci.h>
- int
- pcibios_present(void)
- {
- return !list_empty(&pci_devices);
- }
- int
- pcibios_find_class(unsigned int class, unsigned short index, unsigned char *bus, unsigned char *devfn)
- {
- const struct pci_dev *dev = NULL;
- int cnt = 0;
- while ((dev = pci_find_class(class, dev)))
- if (index == cnt++) {
- *bus = dev->bus->number;
- *devfn = dev->devfn;
- return PCIBIOS_SUCCESSFUL;
- }
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- int
- pcibios_find_device(unsigned short vendor, unsigned short device, unsigned short index,
- unsigned char *bus, unsigned char *devfn)
- {
- const struct pci_dev *dev = NULL;
- int cnt = 0;
- while ((dev = pci_find_device(vendor, device, dev)))
- if (index == cnt++) {
- *bus = dev->bus->number;
- *devfn = dev->devfn;
- return PCIBIOS_SUCCESSFUL;
- }
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- #define PCI_OP(rw,size,type)
- int pcibios_##rw##_config_##size (unsigned char bus, unsigned char dev_fn,
- unsigned char where, unsigned type val)
- {
- struct pci_dev *dev = pci_find_slot(bus, dev_fn);
- if (!dev) return PCIBIOS_DEVICE_NOT_FOUND;
- return pci_##rw##_config_##size(dev, where, val);
- }
- PCI_OP(read, byte, char *)
- PCI_OP(read, word, short *)
- PCI_OP(read, dword, int *)
- PCI_OP(write, byte, char)
- PCI_OP(write, word, short)
- PCI_OP(write, dword, int)