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#endif /* _ASM_X86_PCI_DIRECT_H */