LXR linux/arch/x86/include/asm/pci-direct.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_PCI_DIRECT_H
   3#define _ASM_X86_PCI_DIRECT_H
   4
   5#include <linux/types.h>
   6
   7/* Direct PCI access. This is used for PCI accesses in early boot before
   8   the PCI subsystem works. */
   9
  10extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset);
  11extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
  12extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
  13extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
  14extern void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val);
  15extern void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val);
  16
  17extern int early_pci_allowed(void);
  18
  19extern unsigned int pci_early_dump_regs;
  20extern void early_dump_pci_device(u8 bus, u8 slot, u8 func);
  21extern void early_dump_pci_devices(void);
  22#endif /* _ASM_X86_PCI_DIRECT_H */
  23