2008-10-12 02:03:17 +02:00
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/*
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* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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2012-07-20 20:55:45 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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2008-10-12 02:03:17 +02:00
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*/
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2009-05-01 16:41:06 +02:00
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FILE_LICENCE ( GPL2_OR_LATER );
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2010-04-19 21:16:01 +02:00
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#include <ipxe/io.h>
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#include <ipxe/x86_io.h>
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2008-10-12 02:03:17 +02:00
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/** @file
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*
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2010-04-19 21:16:01 +02:00
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* iPXE I/O API for x86
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2008-10-12 02:03:17 +02:00
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*
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*/
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/**
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* Read 64-bit qword from memory-mapped device
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*
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* @v io_addr I/O address
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* @ret data Value read
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*
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* This routine uses MMX instructions.
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*/
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2012-07-17 21:53:25 +02:00
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static __unused uint64_t i386_readq ( volatile uint64_t *io_addr ) {
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2008-10-12 02:03:17 +02:00
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uint64_t data;
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__asm__ __volatile__ ( "pushl %%edx\n\t"
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"pushl %%eax\n\t"
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"movq (%1), %%mm0\n\t"
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"movq %%mm0, (%%esp)\n\t"
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"popl %%eax\n\t"
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"popl %%edx\n\t"
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"emms\n\t"
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: "=A" ( data ) : "r" ( io_addr ) );
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return data;
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}
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/**
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* Write 64-bit qword to memory-mapped device
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*
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* @v data Value to write
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* @v io_addr I/O address
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*
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* This routine uses MMX instructions.
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*/
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2012-07-17 21:53:25 +02:00
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static __unused void i386_writeq ( uint64_t data, volatile uint64_t *io_addr ) {
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2008-10-12 02:03:17 +02:00
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__asm__ __volatile__ ( "pushl %%edx\n\t"
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"pushl %%eax\n\t"
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"movq (%%esp), %%mm0\n\t"
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"movq %%mm0, (%1)\n\t"
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"popl %%eax\n\t"
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"popl %%edx\n\t"
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"emms\n\t"
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: : "A" ( data ), "r" ( io_addr ) );
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}
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2008-10-13 04:47:33 +02:00
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PROVIDE_IOAPI_INLINE ( x86, phys_to_bus );
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PROVIDE_IOAPI_INLINE ( x86, bus_to_phys );
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2008-10-12 03:11:50 +02:00
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PROVIDE_IOAPI_INLINE ( x86, ioremap );
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PROVIDE_IOAPI_INLINE ( x86, iounmap );
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PROVIDE_IOAPI_INLINE ( x86, io_to_bus );
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2008-10-12 02:03:17 +02:00
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PROVIDE_IOAPI_INLINE ( x86, readb );
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PROVIDE_IOAPI_INLINE ( x86, readw );
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PROVIDE_IOAPI_INLINE ( x86, readl );
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PROVIDE_IOAPI_INLINE ( x86, writeb );
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PROVIDE_IOAPI_INLINE ( x86, writew );
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PROVIDE_IOAPI_INLINE ( x86, writel );
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PROVIDE_IOAPI_INLINE ( x86, inb );
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PROVIDE_IOAPI_INLINE ( x86, inw );
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PROVIDE_IOAPI_INLINE ( x86, inl );
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PROVIDE_IOAPI_INLINE ( x86, outb );
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PROVIDE_IOAPI_INLINE ( x86, outw );
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PROVIDE_IOAPI_INLINE ( x86, outl );
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PROVIDE_IOAPI_INLINE ( x86, insb );
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PROVIDE_IOAPI_INLINE ( x86, insw );
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PROVIDE_IOAPI_INLINE ( x86, insl );
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PROVIDE_IOAPI_INLINE ( x86, outsb );
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PROVIDE_IOAPI_INLINE ( x86, outsw );
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PROVIDE_IOAPI_INLINE ( x86, outsl );
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PROVIDE_IOAPI_INLINE ( x86, iodelay );
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PROVIDE_IOAPI_INLINE ( x86, mb );
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2012-07-17 21:53:25 +02:00
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#ifdef __x86_64__
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PROVIDE_IOAPI_INLINE ( x86, readq );
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PROVIDE_IOAPI_INLINE ( x86, writeq );
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#else
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PROVIDE_IOAPI ( x86, readq, i386_readq );
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PROVIDE_IOAPI ( x86, writeq, i386_writeq );
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#endif
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