diff options
Diffstat (limited to 'arch/x86/include/asm/pci-direct.h')
| -rw-r--r-- | arch/x86/include/asm/pci-direct.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pci-direct.h b/arch/x86/include/asm/pci-direct.h new file mode 100644 index 000000000..94597a3cf --- /dev/null +++ b/arch/x86/include/asm/pci-direct.h @@ -0,0 +1,18 @@ +/* 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 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 int early_pci_allowed(void); +#endif /* _ASM_X86_PCI_DIRECT_H */ |