root/arch/x86/include/asm/pci-direct.h

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INCLUDED FROM

   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 
  10 extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset);
  11 extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
  12 extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
  13 extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
  14 extern void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val);
  15 extern void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val);
  16 
  17 extern int early_pci_allowed(void);
  18 #endif /* _ASM_X86_PCI_DIRECT_H */
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