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- /*
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <ipxe/io.h>
- #include <ipxe/x86_io.h>
-
- /** @file
- *
- * iPXE I/O API for x86
- *
- */
-
- /**
- * Read 64-bit qword from memory-mapped device
- *
- * @v io_addr I/O address
- * @ret data Value read
- *
- * This routine uses MMX instructions.
- */
- static __unused uint64_t i386_readq ( volatile uint64_t *io_addr ) {
- uint64_t data;
- __asm__ __volatile__ ( "pushl %%edx\n\t"
- "pushl %%eax\n\t"
- "movq (%1), %%mm0\n\t"
- "movq %%mm0, (%%esp)\n\t"
- "popl %%eax\n\t"
- "popl %%edx\n\t"
- "emms\n\t"
- : "=A" ( data ) : "r" ( io_addr ) );
- return data;
- }
-
- /**
- * Write 64-bit qword to memory-mapped device
- *
- * @v data Value to write
- * @v io_addr I/O address
- *
- * This routine uses MMX instructions.
- */
- static __unused void i386_writeq ( uint64_t data, volatile uint64_t *io_addr ) {
- __asm__ __volatile__ ( "pushl %%edx\n\t"
- "pushl %%eax\n\t"
- "movq (%%esp), %%mm0\n\t"
- "movq %%mm0, (%1)\n\t"
- "popl %%eax\n\t"
- "popl %%edx\n\t"
- "emms\n\t"
- : : "A" ( data ), "r" ( io_addr ) );
- }
-
- PROVIDE_IOAPI_INLINE ( x86, phys_to_bus );
- PROVIDE_IOAPI_INLINE ( x86, bus_to_phys );
- PROVIDE_IOAPI_INLINE ( x86, readb );
- PROVIDE_IOAPI_INLINE ( x86, readw );
- PROVIDE_IOAPI_INLINE ( x86, readl );
- PROVIDE_IOAPI_INLINE ( x86, writeb );
- PROVIDE_IOAPI_INLINE ( x86, writew );
- PROVIDE_IOAPI_INLINE ( x86, writel );
- PROVIDE_IOAPI_INLINE ( x86, inb );
- PROVIDE_IOAPI_INLINE ( x86, inw );
- PROVIDE_IOAPI_INLINE ( x86, inl );
- PROVIDE_IOAPI_INLINE ( x86, outb );
- PROVIDE_IOAPI_INLINE ( x86, outw );
- PROVIDE_IOAPI_INLINE ( x86, outl );
- PROVIDE_IOAPI_INLINE ( x86, insb );
- PROVIDE_IOAPI_INLINE ( x86, insw );
- PROVIDE_IOAPI_INLINE ( x86, insl );
- PROVIDE_IOAPI_INLINE ( x86, outsb );
- PROVIDE_IOAPI_INLINE ( x86, outsw );
- PROVIDE_IOAPI_INLINE ( x86, outsl );
- PROVIDE_IOAPI_INLINE ( x86, iodelay );
- PROVIDE_IOAPI_INLINE ( x86, mb );
- #ifdef __x86_64__
- PROVIDE_IOAPI_INLINE ( x86, readq );
- PROVIDE_IOAPI_INLINE ( x86, writeq );
- #else
- PROVIDE_IOAPI ( x86, readq, i386_readq );
- PROVIDE_IOAPI ( x86, writeq, i386_writeq );
- #endif
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