arch/hexagon/lib/io.c

   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
  31 /*
  32  * __raw_writesw - read words a short at a time
  33  * @addr:  source address
  34  * @data:  data address
  35  * @len: number of shorts to read
  36  */
  37 void __raw_writesw(void __iomem *addr, const void *data, int len)
  38 {
  39         const short int *src = (short int *)data;
  40         volatile short int *dst = (short int *)addr;
  41
  42         if ((u32)data & 0x1)
  43                 panic("unaligned pointer to writesw");
  44
  45         while (len-- > 0)
  46                 *dst = *src++;
  47
  48
  49 }
  50
  51 /*  Pretty sure len is pre-adjusted for the length of the access already */
  52 void __raw_readsl(const void __iomem *addr, void *data, int len)
  53 {
  54         const volatile long *src = (long *) addr;
  55         long *dst = (long *) data;
  56
  57         if ((u32)data & 0x3)
  58                 panic("unaligned pointer to readsl");
  59
  60         while (len-- > 0)
  61                 *dst++ = *src;
  62
  63
  64 }
  65
  66 void __raw_writesl(void __iomem *addr, const void *data, int len)
  67 {
  68         const long *src = (long *)data;
  69         volatile long *dst = (long *)addr;
  70
  71         if ((u32)data & 0x3)
  72                 panic("unaligned pointer to writesl");
  73
  74         while (len-- > 0)
  75                 *dst = *src++;
  76
  77
  78 }