From 013bf24c38293ca1142823d3c67a4aa4d90c6e66 Mon Sep 17 00:00:00 2001 From: Richard Kuo Date: Mon, 31 Oct 2011 18:48:50 -0500 Subject: Hexagon: Provide basic implementation and/or stubs for I/O routines. Signed-off-by: Richard Kuo Signed-off-by: Linas Vepstas Acked-by: Arnd Bergmann Signed-off-by: Linus Torvalds --- arch/hexagon/lib/io.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 arch/hexagon/lib/io.c (limited to 'arch/hexagon/lib') diff --git a/arch/hexagon/lib/io.c b/arch/hexagon/lib/io.c new file mode 100644 index 000000000000..8ae47ba0e705 --- /dev/null +++ b/arch/hexagon/lib/io.c @@ -0,0 +1,91 @@ +/* + * I/O access functions for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + */ + +#include + +/* These are all FIFO routines! */ + +/* + * __raw_readsw - read words a short at a time + * @addr: source address + * @data: data address + * @len: number of shorts to read + */ +void __raw_readsw(const void __iomem *addr, void *data, int len) +{ + const volatile short int *src = (short int *) addr; + short int *dst = (short int *) data; + + if ((u32)data & 0x1) + panic("unaligned pointer to readsw"); + + while (len-- > 0) + *dst++ = *src; + +} + +/* + * __raw_writesw - read words a short at a time + * @addr: source address + * @data: data address + * @len: number of shorts to read + */ +void __raw_writesw(void __iomem *addr, const void *data, int len) +{ + const short int *src = (short int *)data; + volatile short int *dst = (short int *)addr; + + if ((u32)data & 0x1) + panic("unaligned pointer to writesw"); + + while (len-- > 0) + *dst = *src++; + + +} + +/* Pretty sure len is pre-adjusted for the length of the access already */ +void __raw_readsl(const void __iomem *addr, void *data, int len) +{ + const volatile long *src = (long *) addr; + long *dst = (long *) data; + + if ((u32)data & 0x3) + panic("unaligned pointer to readsl"); + + while (len-- > 0) + *dst++ = *src; + + +} + +void __raw_writesl(void __iomem *addr, const void *data, int len) +{ + const long *src = (long *)data; + volatile long *dst = (long *)addr; + + if ((u32)data & 0x3) + panic("unaligned pointer to writesl"); + + while (len-- > 0) + *dst = *src++; + + +} -- cgit v1.2.3-59-g8ed1b