diff options
Diffstat (limited to 'include/bsp/tictac.h')
-rw-r--r-- | include/bsp/tictac.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/bsp/tictac.h b/include/bsp/tictac.h new file mode 100644 index 0000000000..31c7386943 --- /dev/null +++ b/include/bsp/tictac.h @@ -0,0 +1,78 @@ +/** + * @file + * + * @ingroup powerpc_shared + * + * @brief Header file for tic-tac code. + */ + +/* + * Copyright (c) 2008 + * Embedded Brains GmbH + * Obere Lagerstr. 30 + * D-82178 Puchheim + * Germany + * rtems@embedded-brains.de + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +/** + * @brief Reset reference ticks for tac(). + */ +static inline void tic() +{ + uint32_t tmp; + asm volatile ( + "mftb 0;" + "stw 0, ppc_tic_tac@sdarel(13);" + : "=r" (tmp) + ); +} + +/** + * @brief Returns number of ticks since last tic(). + */ +static inline uint32_t tac() +{ + uint32_t ticks; + uint32_t tmp; + asm volatile ( + "mftb %0;" + "lwz %1, ppc_tic_tac@sdarel(13);" + "subf %0, %1, %0;" + : "=r" (ticks), "=r" (tmp) + ); + return ticks; +} + +/** + * @brief Reset reference ticks for bam(). + */ +static inline void boom() +{ + uint32_t tmp; + asm volatile ( + "mftb 0;" + "stw 0, ppc_boom_bam@sdarel(13);" + : "=r" (tmp) + ); +} + +/** + * @brief Returns number of ticks since last boom(). + */ +static inline uint32_t bam() +{ + uint32_t ticks; + uint32_t tmp; + asm volatile ( + "mftb %0;" + "lwz %1, ppc_boom_bam@sdarel(13);" + "subf %0, %1, %0;" + : "=r" (ticks), "=r" (tmp) + ); + return ticks; +} |