diff options
Diffstat (limited to 'contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/efi_io.h')
| -rw-r--r-- | contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/efi_io.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/efi_io.h b/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/efi_io.h new file mode 100644 index 0000000..7ad5ffe --- /dev/null +++ b/contrib/syslinux-4.02/gpxe/src/include/gpxe/efi/efi_io.h @@ -0,0 +1,180 @@ +#ifndef _GPXE_EFI_IO_H +#define _GPXE_EFI_IO_H + +/** @file + * + * gPXE I/O API for EFI + * + * EFI runs with flat physical addressing, so the various mappings + * between virtual addresses, I/O addresses and bus addresses are all + * no-ops. I/O is handled using the EFI_CPU_IO_PROTOCOL. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#ifdef IOAPI_EFI +#define IOAPI_PREFIX_efi +#else +#define IOAPI_PREFIX_efi __efi_ +#endif + +extern unsigned long long efi_ioread ( volatile void *io_addr, + size_t size ); +extern void efi_iowrite ( unsigned long long data, volatile void *io_addr, + size_t size ); +extern void efi_ioreads ( volatile void *io_addr, void *data, + size_t size, unsigned int count ); +extern void efi_iowrites ( volatile void *io_addr, const void *data, + size_t size, unsigned int count ); + +/* + * Physical<->Bus and Bus<->I/O address mappings + * + * EFI runs with flat physical addressing, so these are all no-ops. + * + */ + +static inline __always_inline unsigned long +IOAPI_INLINE ( efi, phys_to_bus ) ( unsigned long phys_addr ) { + return phys_addr; +} + +static inline __always_inline unsigned long +IOAPI_INLINE ( efi, bus_to_phys ) ( unsigned long bus_addr ) { + return bus_addr; +} + +static inline __always_inline void * +IOAPI_INLINE ( efi, ioremap ) ( unsigned long bus_addr, size_t len __unused ) { + return ( ( void * ) bus_addr ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, iounmap ) ( volatile const void *io_addr __unused ) { + /* Nothing to do */ +} + +static inline __always_inline unsigned long +IOAPI_INLINE ( efi, io_to_bus ) ( volatile const void *io_addr ) { + return ( ( unsigned long ) io_addr ); +} + +/* + * I/O functions + * + */ + +static inline __always_inline uint8_t +IOAPI_INLINE ( efi, readb ) ( volatile uint8_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint16_t +IOAPI_INLINE ( efi, readw ) ( volatile uint16_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint32_t +IOAPI_INLINE ( efi, readl ) ( volatile uint32_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint64_t +IOAPI_INLINE ( efi, readq ) ( volatile uint64_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, writeb ) ( uint8_t data, volatile uint8_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, writew ) ( uint16_t data, volatile uint16_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, writel ) ( uint32_t data, volatile uint32_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, writeq ) ( uint64_t data, volatile uint64_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint8_t +IOAPI_INLINE ( efi, inb ) ( volatile uint8_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint16_t +IOAPI_INLINE ( efi, inw ) ( volatile uint16_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline uint32_t +IOAPI_INLINE ( efi, inl ) ( volatile uint32_t *io_addr ) { + return efi_ioread ( io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outb ) ( uint8_t data, volatile uint8_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outw ) ( uint16_t data, volatile uint16_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outl ) ( uint32_t data, volatile uint32_t *io_addr ) { + efi_iowrite ( data, io_addr, sizeof ( *io_addr ) ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, insb ) ( volatile uint8_t *io_addr, uint8_t *data, + unsigned int count ) { + efi_ioreads ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, insw ) ( volatile uint16_t *io_addr, uint16_t *data, + unsigned int count ) { + efi_ioreads ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, insl ) ( volatile uint32_t *io_addr, uint32_t *data, + unsigned int count ) { + efi_ioreads ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outsb ) ( volatile uint8_t *io_addr, const uint8_t *data, + unsigned int count ) { + efi_iowrites ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outsw ) ( volatile uint16_t *io_addr, const uint16_t *data, + unsigned int count ) { + efi_iowrites ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, outsl ) ( volatile uint32_t *io_addr, const uint32_t *data, + unsigned int count ) { + efi_iowrites ( io_addr, data, sizeof ( *io_addr ), count ); +} + +static inline __always_inline void +IOAPI_INLINE ( efi, mb ) ( void ) { + /* Do nothing; EFI readl()/writel() calls already act as + * memory barriers. + */ +} + +#endif /* _GPXE_EFI_IO_H */ |