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author | inmarket <andrewh@inmarket.com.au> | 2014-10-06 17:05:16 +1000 |
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committer | inmarket <andrewh@inmarket.com.au> | 2014-10-06 17:05:16 +1000 |
commit | 5a3f22617b02ec366461be21765e636e6bdd0222 (patch) | |
tree | 853945ab638d80f7d027bd08231f18ea94b4b4e9 /boards/base/RaspberryPi/FreeRTOS/mmio.h | |
parent | 50dfad6f038ed5d20a357f634a70b23c570b26ed (diff) | |
download | uGFX-5a3f22617b02ec366461be21765e636e6bdd0222.tar.gz uGFX-5a3f22617b02ec366461be21765e636e6bdd0222.tar.bz2 uGFX-5a3f22617b02ec366461be21765e636e6bdd0222.zip |
Add support for FreeRTOS into make system
Diffstat (limited to 'boards/base/RaspberryPi/FreeRTOS/mmio.h')
-rw-r--r-- | boards/base/RaspberryPi/FreeRTOS/mmio.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/boards/base/RaspberryPi/FreeRTOS/mmio.h b/boards/base/RaspberryPi/FreeRTOS/mmio.h new file mode 100644 index 00000000..89bea700 --- /dev/null +++ b/boards/base/RaspberryPi/FreeRTOS/mmio.h @@ -0,0 +1,24 @@ +/* mmio.h - access to MMIO registers */ + +#ifndef MMIO_H +#define MMIO_H + +#include <stdint.h> + +// write to MMIO register +static inline void mmio_write(uint32_t reg, uint32_t data) { + uint32_t *ptr = (uint32_t*)reg; + asm volatile("str %[data], [%[reg]]" + : : [reg]"r"(ptr), [data]"r"(data)); +} + +// read from MMIO register +static inline uint32_t mmio_read(uint32_t reg) { + uint32_t *ptr = (uint32_t*)reg; + uint32_t data; + asm volatile("ldr %[data], [%[reg]]" + : [data]"=r"(data) : [reg]"r"(ptr)); + return data; +} + +#endif // #ifndef MMIO_H |