X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=FreeRTOS%2FDemo%2FCORTEX_M7_SAME70_Xplained_AtmelStudio%2Fsrc%2FASF%2Fsam%2Futils%2Ffpu%2Ffpu.h;fp=FreeRTOS%2FDemo%2FCORTEX_M7_SAME70_Xplained_AtmelStudio%2Fsrc%2FASF%2Fsam%2Futils%2Ffpu%2Ffpu.h;h=472a7455f3e6dcf9a5b0dac13c3e10952bfa2f9a;hb=f934fa7c6b2724e23523bd8a52764106e985c26b;hp=0000000000000000000000000000000000000000;hpb=831ff827e29d5cffe1ed6229d143e4b4fccd6486;p=freertos diff --git a/FreeRTOS/Demo/CORTEX_M7_SAME70_Xplained_AtmelStudio/src/ASF/sam/utils/fpu/fpu.h b/FreeRTOS/Demo/CORTEX_M7_SAME70_Xplained_AtmelStudio/src/ASF/sam/utils/fpu/fpu.h new file mode 100644 index 000000000..472a7455f --- /dev/null +++ b/FreeRTOS/Demo/CORTEX_M7_SAME70_Xplained_AtmelStudio/src/ASF/sam/utils/fpu/fpu.h @@ -0,0 +1,94 @@ +/** + * \file + * + * \brief FPU support for SAM. + * + * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved. + * + * \asf_license_start + * + * \page License + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an + * Atmel microcontroller product. + * + * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * \asf_license_stop + * + */ +/* + * Support and FAQ: visit Atmel Support + */ + +#ifndef _FPU_H_INCLUDED_ +#define _FPU_H_INCLUDED_ + +#include + +/** Address for ARM CPACR */ +#define ADDR_CPACR 0xE000ED88 + +/** CPACR Register */ +#define REG_CPACR (*((volatile uint32_t *)ADDR_CPACR)) + +/** + * \brief Enable FPU + */ +__always_inline static void fpu_enable(void) +{ + irqflags_t flags; + flags = cpu_irq_save(); + REG_CPACR |= (0xFu << 20); + __DSB(); + __ISB(); + cpu_irq_restore(flags); +} + +/** + * \brief Disable FPU + */ +__always_inline static void fpu_disable(void) +{ + irqflags_t flags; + flags = cpu_irq_save(); + REG_CPACR &= ~(0xFu << 20); + __DSB(); + __ISB(); + cpu_irq_restore(flags); +} + +/** + * \brief Check if FPU is enabled + * + * \return Return ture if FPU is enabled, otherwise return false. + */ +__always_inline static bool fpu_is_enabled(void) +{ + return (REG_CPACR & (0xFu << 20)); +} + +#endif /* _FPU_H_INCLUDED_ */