ARMv7-M-bit-banding.h

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#ifndef SOURCE_ARCHITECTURE_ARM_ARMV6_M_ARMV7_M_INCLUDE_DISTORTOS_ARCHITECTURE_ARMV7_M_BIT_BANDING_H_
#define SOURCE_ARCHITECTURE_ARM_ARMV6_M_ARMV7_M_INCLUDE_DISTORTOS_ARCHITECTURE_ARMV7_M_BIT_BANDING_H_

#include "distortos/distortosConfiguration.h"

#if defined(DISTORTOS_ARCHITECTURE_ARM_CORTEX_M3) || defined(DISTORTOS_ARCHITECTURE_ARM_CORTEX_M4)

/*---------------------------------------------------------------------------------------------------------------------+
| global defines
+---------------------------------------------------------------------------------------------------------------------*/

#define DISTORTOS_BITBANDING_SUPPORTED

enum { bitbandSramBegin = 0x20000000 };

enum { bitbandSramEnd = 0x200fffff };

enum { bitbandSramBase = 0x22000000 };

enum { bitbandPeripheralBegin = 0x40000000 };

enum { bitbandPeripheralEnd = 0x400fffff };

enum { bitbandPeripheralBase = 0x42000000 };

#define BITBAND_SRAM_ADDRESS(address, bit) \
        (bitbandSramBase + (((unsigned long)address) - bitbandSramBegin) * 32 + (bit) * 4)

#define BITBAND_PERIPHERAL_ADDRESS(address, bit) \
        (bitbandPeripheralBase + (((unsigned long)address) - bitbandPeripheralBegin) * 32 + (bit) * 4)

#define BITBAND_ADDRESS(address, bit) \
        ((((unsigned long)address) >= bitbandSramBegin) && (((unsigned long)address) <= bitbandSramEnd) ? \
        BITBAND_SRAM_ADDRESS(address, bit) : \
        (((unsigned long)address) >= bitbandPeripheralBegin) && (((unsigned long)address) <= bitbandPeripheralEnd) ? \
        BITBAND_PERIPHERAL_ADDRESS(address, bit) : \
        0 /* fail */ )

#define BITBAND_SRAM(address, bit)          (*(volatile unsigned long*)BITBAND_SRAM_ADDRESS(address, bit))

#define BITBAND_PERIPHERAL(address, bit)    (*(volatile unsigned long*)BITBAND_PERIPHERAL_ADDRESS(address, bit))

#define BITBAND(address, bit)               (*(volatile unsigned long*)BITBAND_ADDRESS(address, bit))

#endif  /* defined(DISTORTOS_ARCHITECTURE_ARM_CORTEX_M3) || defined(DISTORTOS_ARCHITECTURE_ARM_CORTEX_M4) */

#endif  /* SOURCE_ARCHITECTURE_ARM_ARMV6_M_ARMV7_M_INCLUDE_DISTORTOS_ARCHITECTURE_ARMV7_M_BIT_BANDING_H_ */