0,0 → 1,59 |
/* |
* Copyright (c) 2007 Petr Stepan |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
*/ |
|
/** @addtogroup arm32 |
* @{ |
*/ |
/** |
* @file |
* @brief Utilities for convenient manipulation with ARM registries. |
*/ |
|
#ifndef KERN_arm32_REGUTILS_H_ |
#define KERN_arm32_REGUTILS_H_ |
|
#define status_reg_ie_enabled_bit (1 << 7) |
|
/** Returns the value of CPSR (Current Program Status Register). |
*/ |
static inline ipl_t status_reg_read (void) { |
ipl_t ipl; |
asm("mrs %0, CPSR" : "=r" (ipl)); |
return ipl; |
} |
|
/** Sets control bits of CPSR |
*/ |
static inline void status_reg_control_write(ipl_t ipl) { |
asm("msr CPSR_c, %0" : : "r" (ipl)); |
} |
|
#endif |
|
/** @} |
*/ |