Last change
on this file since 653 was
653,
checked in by cfuguet, 11 years ago
|
Introducing a RAMDISK driver in the preloader.
When using RAMDISK, execute the make command with the flags
SOCLIB=1 and RAMDISK=1. The RDK_PADDR_BASE variable must
also be set on the conf/<platform>/defs_platform.h
These modifications are backward compatibles. Therefore,
when no using RAMDISK, none modifications applied on the
platform configuration file.
|
File size:
1.3 KB
|
Rev | Line | |
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[292] | 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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[653] | 41 | asm volatile("sync" ::: "memory"); |
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[292] | 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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[653] | 50 | asm volatile("sync" ::: "memory"); |
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[292] | 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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[653] | 59 | asm volatile("sync" ::: "memory"); |
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[292] | 60 | } |
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| 61 | |
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| 62 | #undef in_reset |
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| 63 | |
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| 64 | #endif |
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