diff options
Diffstat (limited to 'gpxe/src/interface/efi/efi_io.c')
| -rw-r--r-- | gpxe/src/interface/efi/efi_io.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/gpxe/src/interface/efi/efi_io.c b/gpxe/src/interface/efi/efi_io.c deleted file mode 100644 index 0ba16f8f..00000000 --- a/gpxe/src/interface/efi/efi_io.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <assert.h> -#include <gpxe/io.h> -#include <gpxe/efi/efi.h> -#include <gpxe/efi/Protocol/CpuIo.h> -#include <gpxe/efi/efi_io.h> - -/** @file - * - * gPXE I/O API for EFI - * - */ - -/** CPU I/O protocol */ -static EFI_CPU_IO_PROTOCOL *cpu_io; -EFI_REQUIRE_PROTOCOL ( EFI_CPU_IO_PROTOCOL, &cpu_io ); - -/** Maximum address that can be used for port I/O */ -#define MAX_PORT_ADDRESS 0xffff - -/** - * Determine whether or not address is a port I/O address - * - * @v io_addr I/O address - * @v is_port I/O address is a port I/O address - */ -#define IS_PORT_ADDRESS(io_addr) \ - ( ( ( intptr_t ) (io_addr) ) <= MAX_PORT_ADDRESS ) - -/** - * Determine EFI CPU I/O width code - * - * @v size Size of value - * @ret width EFI width code - * - * Someone at Intel clearly gets paid by the number of lines of code - * they write. No-one should ever be able to make I/O this - * convoluted. The EFI_CPU_IO_PROTOCOL_WIDTH enum is my favourite - * idiocy. - */ -static EFI_CPU_IO_PROTOCOL_WIDTH efi_width ( size_t size ) { - switch ( size ) { - case 1 : return EfiCpuIoWidthFifoUint8; - case 2 : return EfiCpuIoWidthFifoUint16; - case 4 : return EfiCpuIoWidthFifoUint32; - case 8 : return EfiCpuIoWidthFifoUint64; - default : - assert ( 0 ); - /* I wonder what this will actually do... */ - return EfiCpuIoWidthMaximum; - } -} - -/** - * Read from device - * - * @v io_addr I/O address - * @v size Size of value - * @ret data Value read - */ -unsigned long long efi_ioread ( volatile void *io_addr, size_t size ) { - EFI_CPU_IO_PROTOCOL_IO_MEM read; - unsigned long long data = 0; - EFI_STATUS efirc; - - read = ( IS_PORT_ADDRESS ( io_addr ) ? - cpu_io->Io.Read : cpu_io->Mem.Read ); - - if ( ( efirc = read ( cpu_io, efi_width ( size ), - ( intptr_t ) io_addr, 1, - ( void * ) &data ) ) != 0 ) { - DBG ( "EFI I/O read at %p failed: %s\n", - io_addr, efi_strerror ( efirc ) ); - return -1ULL; - } - - return data; -} - -/** - * Write to device - * - * @v data Value to write - * @v io_addr I/O address - * @v size Size of value - */ -void efi_iowrite ( unsigned long long data, volatile void *io_addr, - size_t size ) { - EFI_CPU_IO_PROTOCOL_IO_MEM write; - EFI_STATUS efirc; - - write = ( IS_PORT_ADDRESS ( io_addr ) ? - cpu_io->Io.Write : cpu_io->Mem.Write ); - - if ( ( efirc = write ( cpu_io, efi_width ( size ), - ( intptr_t ) io_addr, 1, - ( void * ) &data ) ) != 0 ) { - DBG ( "EFI I/O write at %p failed: %s\n", - io_addr, efi_strerror ( efirc ) ); - } -} - -/** - * String read from device - * - * @v io_addr I/O address - * @v data Data buffer - * @v size Size of values - * @v count Number of values to read - */ -void efi_ioreads ( volatile void *io_addr, void *data, - size_t size, unsigned int count ) { - EFI_CPU_IO_PROTOCOL_IO_MEM read; - EFI_STATUS efirc; - - read = ( IS_PORT_ADDRESS ( io_addr ) ? - cpu_io->Io.Read : cpu_io->Mem.Read ); - - if ( ( efirc = read ( cpu_io, efi_width ( size ), - ( intptr_t ) io_addr, count, - ( void * ) data ) ) != 0 ) { - DBG ( "EFI I/O string read at %p failed: %s\n", - io_addr, efi_strerror ( efirc ) ); - } -} - -/** - * String write to device - * - * @v io_addr I/O address - * @v data Data buffer - * @v size Size of values - * @v count Number of values to write - */ -void efi_iowrites ( volatile void *io_addr, const void *data, - size_t size, unsigned int count ) { - EFI_CPU_IO_PROTOCOL_IO_MEM write; - EFI_STATUS efirc; - - write = ( IS_PORT_ADDRESS ( io_addr ) ? - cpu_io->Io.Write : cpu_io->Mem.Write ); - - if ( ( efirc = write ( cpu_io, efi_width ( size ), - ( intptr_t ) io_addr, count, - ( void * ) data ) ) != 0 ) { - DBG ( "EFI I/O write at %p failed: %s\n", - io_addr, efi_strerror ( efirc ) ); - } -} - -/** - * Wait for I/O-mapped operation to complete - * - */ -static void efi_iodelay ( void ) { - /* Write to non-existent port. Probably x86-only. */ - outb ( 0, 0x80 ); -} - -PROVIDE_IOAPI_INLINE ( efi, phys_to_bus ); -PROVIDE_IOAPI_INLINE ( efi, bus_to_phys ); -PROVIDE_IOAPI_INLINE ( efi, ioremap ); -PROVIDE_IOAPI_INLINE ( efi, iounmap ); -PROVIDE_IOAPI_INLINE ( efi, io_to_bus ); -PROVIDE_IOAPI_INLINE ( efi, readb ); -PROVIDE_IOAPI_INLINE ( efi, readw ); -PROVIDE_IOAPI_INLINE ( efi, readl ); -PROVIDE_IOAPI_INLINE ( efi, readq ); -PROVIDE_IOAPI_INLINE ( efi, writeb ); -PROVIDE_IOAPI_INLINE ( efi, writew ); -PROVIDE_IOAPI_INLINE ( efi, writel ); -PROVIDE_IOAPI_INLINE ( efi, writeq ); -PROVIDE_IOAPI_INLINE ( efi, inb ); -PROVIDE_IOAPI_INLINE ( efi, inw ); -PROVIDE_IOAPI_INLINE ( efi, inl ); -PROVIDE_IOAPI_INLINE ( efi, outb ); -PROVIDE_IOAPI_INLINE ( efi, outw ); -PROVIDE_IOAPI_INLINE ( efi, outl ); -PROVIDE_IOAPI_INLINE ( efi, insb ); -PROVIDE_IOAPI_INLINE ( efi, insw ); -PROVIDE_IOAPI_INLINE ( efi, insl ); -PROVIDE_IOAPI_INLINE ( efi, outsb ); -PROVIDE_IOAPI_INLINE ( efi, outsw ); -PROVIDE_IOAPI_INLINE ( efi, outsl ); -PROVIDE_IOAPI ( efi, iodelay, efi_iodelay ); -PROVIDE_IOAPI_INLINE ( efi, mb ); |