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- /*
- * Copyright (C) 2016 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/arm_io.h>
-
- /** @file
- *
- * iPXE I/O API for ARM
- *
- */
-
- /** An ARM I/O qword */
- union arm32_io_qword {
- uint64_t qword;
- uint32_t dword[2];
- };
-
- /**
- * Read 64-bit qword from memory-mapped device
- *
- * @v io_addr I/O address
- * @ret data Value read
- *
- * This is not atomic for ARM32.
- */
- static uint64_t arm32_readq ( volatile uint64_t *io_addr ) {
- volatile union arm32_io_qword *ptr =
- container_of ( io_addr, union arm32_io_qword, qword );
- union arm32_io_qword tmp;
-
- tmp.dword[0] = readl ( &ptr->dword[0] );
- tmp.dword[1] = readl ( &ptr->dword[1] );
- return tmp.qword;
- }
-
- /**
- * Write 64-bit qword to memory-mapped device
- *
- * @v data Value to write
- * @v io_addr I/O address
- *
- * This is not atomic for ARM32.
- */
- static void arm32_writeq ( uint64_t data, volatile uint64_t *io_addr ) {
- volatile union arm32_io_qword *ptr =
- container_of ( io_addr, union arm32_io_qword, qword );
- union arm32_io_qword tmp;
-
- tmp.qword = data;
- writel ( tmp.dword[0], &ptr->dword[0] );
- writel ( tmp.dword[1], &ptr->dword[1] );
- }
-
- PROVIDE_IOAPI_INLINE ( arm, phys_to_bus );
- PROVIDE_IOAPI_INLINE ( arm, bus_to_phys );
- PROVIDE_IOAPI_INLINE ( arm, readb );
- PROVIDE_IOAPI_INLINE ( arm, readw );
- PROVIDE_IOAPI_INLINE ( arm, readl );
- PROVIDE_IOAPI_INLINE ( arm, writeb );
- PROVIDE_IOAPI_INLINE ( arm, writew );
- PROVIDE_IOAPI_INLINE ( arm, writel );
- PROVIDE_IOAPI_INLINE ( arm, iodelay );
- PROVIDE_IOAPI_INLINE ( arm, mb );
- #ifdef __aarch64__
- PROVIDE_IOAPI_INLINE ( arm, readq );
- PROVIDE_IOAPI_INLINE ( arm, writeq );
- #else
- PROVIDE_IOAPI ( arm, readq, arm32_readq );
- PROVIDE_IOAPI ( arm, writeq, arm32_writeq );
- #endif
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