Viewing file:  pci-direct.h (850 B) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PCI_DIRECT_H
#define _ASM_X86_PCI_DIRECT_H
#include <linux/types.h>
/* Direct PCI access. This is used for PCI accesses in early boot before
the PCI subsystem works. */
extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset);
extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
extern u32 pci_early_find_cap(int bus, int slot, int func, int cap);
extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
extern void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val);
extern void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val);
extern unsigned int pci_early_clear_msi;
extern int early_pci_allowed(void);
#endif /* _ASM_X86_PCI_DIRECT_H */
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