diff options
Diffstat (limited to 'cpukit/score/cpu/lm32/rtems/score/cpu.h')
| -rw-r--r-- | cpukit/score/cpu/lm32/rtems/score/cpu.h | 28 |
1 files changed, 4 insertions, 24 deletions
diff --git a/cpukit/score/cpu/lm32/rtems/score/cpu.h b/cpukit/score/cpu/lm32/rtems/score/cpu.h index 1a6147565a..dd0ec47898 100644 --- a/cpukit/score/cpu/lm32/rtems/score/cpu.h +++ b/cpukit/score/cpu/lm32/rtems/score/cpu.h @@ -289,30 +289,10 @@ extern "C" { */ #define CPU_STACK_GROWS_UP FALSE -/** - * The following is the variable attribute used to force alignment - * of critical RTEMS structures. On some processors it may make - * sense to have these aligned on tighter boundaries than - * the minimum requirements of the compiler in order to have as - * much of the critical data area as possible in a cache line. - * - * The placement of this macro in the declaration of the variables - * is based on the syntactically requirements of the GNU C - * "__attribute__" extension. For example with GNU C, use - * the following to force a structures to a 32 byte boundary. - * - * __attribute__ ((aligned (32))) - * - * NOTE: Currently only the Priority Bit Map table uses this feature. - * To benefit from using this, the data must be heavily - * used so it will stay in the cache and used frequently enough - * in the executive to justify turning this on. - * - * Port Specific Information: - * - * L2 cache lines are 32 bytes in Milkymist SoC - */ -#define CPU_STRUCTURE_ALIGNMENT __attribute__ ((aligned (32))) +/* L2 cache lines are 32 bytes in Milkymist SoC */ +#define CPU_CACHE_LINE_BYTES 32 + +#define CPU_STRUCTURE_ALIGNMENT RTEMS_ALIGNED( CPU_CACHE_LINE_BYTES ) /** * @defgroup CPUEndian Processor Dependent Endianness Support |