diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/asm.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/lib/asm.h b/lib/asm.h new file mode 100644 index 0000000..63310b5 --- /dev/null +++ b/lib/asm.h @@ -0,0 +1,42 @@ +/* + * asm.h -- ARM thumb assembly instructions + * + * Copyright (C) 2016-2017 Tomasz Kramkowski <tk@the-tk.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef FMK_ASM_H +#define FMK_ASM_H + +#include <stdint.h> + +#define CLI() __asm__ volatile ("cpsid i") +#define STI() __asm__ volatile ("cpsie i") +#define WFI() __asm__ volatile ("wfi") + +static inline uint32_t get_BASEPRI(void) +{ + uint32_t ret; + + __asm__ volatile ("mrs %0, basepri" :"=r"(ret)); + + return ret; +} + +static inline void set_BASEPRI(uint32_t p) +{ + __asm__ volatile ("msr basepri, %0" ::"r"(p)); +} + +#endif /* FMK_ASM_H */ |