diff options
Diffstat (limited to 'nuttx/arch/arm/src/armv7-m/psr.h')
-rw-r--r-- | nuttx/arch/arm/src/armv7-m/psr.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/armv7-m/psr.h b/nuttx/arch/arm/src/armv7-m/psr.h new file mode 100644 index 000000000..30913f7c9 --- /dev/null +++ b/nuttx/arch/arm/src/armv7-m/psr.h @@ -0,0 +1,87 @@ +/************************************************************************************ + * arch/arm/src/armv7-m/psr.h + * + * Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS 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. + * + ************************************************************************************/ + +#ifndef __ARCH_ARM_SRC_COMMON_ARMV7_M_PSR_H +#define __ARCH_ARM_SRC_COMMON_ARMV7_M_PSR_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/* Application Program Status Register (APSR) */ + +#define ARMV7M_APSR_Q (1 << 27) /* Bit 27: Sticky saturation flag */ +#define ARMV7M_APSR_V (1 << 28) /* Bit 28: Overflow flag */ +#define ARMV7M_APSR_C (1 << 29) /* Bit 29: Carry/borrow flag */ +#define ARMV7M_APSR_Z (1 << 30) /* Bit 30: Zero flag */ +#define ARMV7M_APSR_N (1 << 31) /* Bit 31: Negative, less than flag */ + +/* Interrupt Program Status Register (IPSR) */ + +#define ARMV7M_IPSR_ISR_SHIFT 0 /* Bits 8-0: ISR number */ +#define ARMV7M_IPSR_ISR_MASK (0x1ff << ARMV7M_IPSR_ISR_SHIFT) + +/* Execution PSR Register (EPSR) */ + +#define ARMV7M_EPSR_ICIIT1_SHIFT 10 /* Bits 15-10: Interrupt-Continuable-Instruction/If-Then bits */ +#define ARMV7M_EPSR_ICIIT1_MASK (3 << ARMV7M_EPSR_ICIIT1_SHIFT) +#define ARMV7M_EPSR_T (1 << 24) /* Bit 24: T-bit */ +#define ARMV7M_EPSR_ICIIT2_SHIFT 25 /* Bits 26-25: Interrupt-Continuable-Instruction/If-Then bits */ +#define ARMV7M_EPSR_ICIIT2_MASK (3 << ARMV7M_EPSR_ICIIT2_SHIFT) + +/* Save xPSR bits */ + +#define ARMV7M_XPSR_ISR_SHIFT ARMV7M_IPSR_ISR_SHIFT +#define ARMV7M_XPSR_ISR_MASK ARMV7M_IPSR_ISR_MASK +#define ARMV7M_XPSR_ICIIT1_SHIFT ARMV7M_EPSR_ICIIT1_SHIFT/ +#define ARMV7M_XPSR_ICIIT1_MASK ARMV7M_EPSR_ICIIT1_MASK +#define ARMV7M_XPSR_T ARMV7M_EPSR_T +#define ARMV7M_XPSR_ICIIT2_SHIFT ARMV7M_EPSR_ICIIT2_SHIFT +#define ARMV7M_XPSR_ICIIT2_MASK ARMV7M_EPSR_ICIIT2_MASK +#define ARMV7M_XPSR_Q ARMV7M_APSR_Q +#define ARMV7M_XPSR_V ARMV7M_APSR_V +#define ARMV7M_XPSR_C ARMV7M_APSR_C +#define ARMV7M_XPSR_Z ARMV7M_APSR_Z +#define ARMV7M_XPSR_N ARMV7M_APSR_N + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +#endif /* __ARCH_ARM_SRC_COMMON_ARMV7_M_PSR_H */ |