1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * I/O access functions for Hexagon 4 * 5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. 6 */ 7 8 #include <asm/io.h> 9 10 /* These are all FIFO routines! */ 11 12 /* 13 * __raw_readsw - read words a short at a time 14 * @addr: source address 15 * @data: data address 16 * @len: number of shorts to read 17 */ 18 void __raw_readsw(const void __iomem *addr, void *data, int len) 19 { 20 const volatile short int *src = (short int *) addr; 21 short int *dst = (short int *) data; 22 23 if ((u32)data & 0x1) 24 panic("unaligned pointer to readsw"); 25 26 while (len-- > 0) 27 *dst++ = *src; 28 29 } 30 EXPORT_SYMBOL(__raw_readsw); 31 32 /* 33 * __raw_writesw - read words a short at a time 34 * @addr: source address 35 * @data: data address 36 * @len: number of shorts to read 37 */ 38 void __raw_writesw(void __iomem *addr, const void *data, int len) 39 { 40 const short int *src = (short int *)data; 41 volatile short int *dst = (short int *)addr; 42 43 if ((u32)data & 0x1) 44 panic("unaligned pointer to writesw"); 45 46 while (len-- > 0) 47 *dst = *src++; 48 49 50 } 51 EXPORT_SYMBOL(__raw_writesw); 52 53 /* Pretty sure len is pre-adjusted for the length of the access already */ 54 void __raw_readsl(const void __iomem *addr, void *data, int len) 55 { 56 const volatile long *src = (long *) addr; 57 long *dst = (long *) data; 58 59 if ((u32)data & 0x3) 60 panic("unaligned pointer to readsl"); 61 62 while (len-- > 0) 63 *dst++ = *src; 64 65 66 } 67 EXPORT_SYMBOL(__raw_readsl); 68 69 void __raw_writesl(void __iomem *addr, const void *data, int len) 70 { 71 const long *src = (long *)data; 72 volatile long *dst = (long *)addr; 73 74 if ((u32)data & 0x3) 75 panic("unaligned pointer to writesl"); 76 77 while (len-- > 0) 78 *dst = *src++; 79 80 81 } 82 EXPORT_SYMBOL(__raw_writesl); 83