Last change
on this file since 655 was
655,
checked in by cfuguet, 11 years ago
|
Fixing bug introduced in last commit :
- When using IO bridge, some header files were missing
in the reset_utils.h file
|
File size:
1.2 KB
|
Line | |
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1 | /** |
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2 | * \file io.h |
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3 | * \date 5 September 2012 |
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4 | * \author Cesar Fuguet |
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5 | * |
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6 | * Utility functions to write or read memory mapped hardware registers |
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7 | */ |
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8 | #ifndef IO_H |
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9 | #define IO_H |
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10 | |
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11 | /** |
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12 | * Read an 32 bits memory mapped hardware register |
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13 | */ |
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14 | static inline unsigned int ioread32(void * addr) |
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15 | { |
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16 | return *(volatile unsigned int *) addr; |
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17 | } |
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18 | |
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19 | /** |
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20 | * Read an 16 bits memory mapped hardware register |
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21 | */ |
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22 | static inline unsigned short ioread16(void * addr) |
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23 | { |
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24 | return *(volatile unsigned short *) addr; |
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25 | } |
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26 | |
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27 | /** |
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28 | * Read an 8 bits memory mapped hardware register |
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29 | */ |
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30 | static inline unsigned char ioread8(void * addr) |
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31 | { |
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32 | return *(volatile unsigned char *) addr; |
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33 | } |
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34 | |
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35 | /** |
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36 | * Write an 32 bits memory mapped hardware register |
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37 | */ |
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38 | static inline void iowrite32(void * addr, unsigned int value) |
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39 | { |
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40 | *(volatile unsigned int *) addr = value; |
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41 | asm volatile("sync" ::: "memory"); |
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42 | } |
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43 | |
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44 | /** |
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45 | * Write an 16 bits memory mapped hardware register |
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46 | */ |
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47 | static inline void iowrite16(void * addr, unsigned short value) |
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48 | { |
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49 | *(volatile unsigned short *) addr = value; |
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50 | asm volatile("sync" ::: "memory"); |
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51 | } |
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52 | |
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53 | /** |
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54 | * Write an 8 bits memory mapped hardware register |
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55 | */ |
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56 | static inline void iowrite8(void * addr, unsigned char value) |
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57 | { |
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58 | *(volatile unsigned char *) addr = value; |
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59 | asm volatile("sync" ::: "memory"); |
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60 | } |
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61 | |
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62 | #endif |
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