| Richard Kuo | 013bf24 | 2011-10-31 18:48:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * I/O access functions for Hexagon |
| 3 | * |
| Richard Kuo | e1858b2 | 2012-09-19 16:22:02 -0500 | [diff] [blame] | 4 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
| Richard Kuo | 013bf24 | 2011-10-31 18:48:50 -0500 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 and |
| 8 | * only version 2 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 18 | * 02110-1301, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <asm/io.h> |
| 22 | |
| 23 | /* These are all FIFO routines! */ |
| 24 | |
| 25 | /* |
| 26 | * __raw_readsw - read words a short at a time |
| 27 | * @addr: source address |
| 28 | * @data: data address |
| 29 | * @len: number of shorts to read |
| 30 | */ |
| 31 | void __raw_readsw(const void __iomem *addr, void *data, int len) |
| 32 | { |
| 33 | const volatile short int *src = (short int *) addr; |
| 34 | short int *dst = (short int *) data; |
| 35 | |
| 36 | if ((u32)data & 0x1) |
| 37 | panic("unaligned pointer to readsw"); |
| 38 | |
| 39 | while (len-- > 0) |
| 40 | *dst++ = *src; |
| 41 | |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * __raw_writesw - read words a short at a time |
| 46 | * @addr: source address |
| 47 | * @data: data address |
| 48 | * @len: number of shorts to read |
| 49 | */ |
| 50 | void __raw_writesw(void __iomem *addr, const void *data, int len) |
| 51 | { |
| 52 | const short int *src = (short int *)data; |
| 53 | volatile short int *dst = (short int *)addr; |
| 54 | |
| 55 | if ((u32)data & 0x1) |
| 56 | panic("unaligned pointer to writesw"); |
| 57 | |
| 58 | while (len-- > 0) |
| 59 | *dst = *src++; |
| 60 | |
| 61 | |
| 62 | } |
| 63 | |
| 64 | /* Pretty sure len is pre-adjusted for the length of the access already */ |
| 65 | void __raw_readsl(const void __iomem *addr, void *data, int len) |
| 66 | { |
| 67 | const volatile long *src = (long *) addr; |
| 68 | long *dst = (long *) data; |
| 69 | |
| 70 | if ((u32)data & 0x3) |
| 71 | panic("unaligned pointer to readsl"); |
| 72 | |
| 73 | while (len-- > 0) |
| 74 | *dst++ = *src; |
| 75 | |
| 76 | |
| 77 | } |
| 78 | |
| 79 | void __raw_writesl(void __iomem *addr, const void *data, int len) |
| 80 | { |
| 81 | const long *src = (long *)data; |
| 82 | volatile long *dst = (long *)addr; |
| 83 | |
| 84 | if ((u32)data & 0x3) |
| 85 | panic("unaligned pointer to writesl"); |
| 86 | |
| 87 | while (len-- > 0) |
| 88 | *dst = *src++; |
| 89 | |
| 90 | |
| 91 | } |