diff options
Diffstat (limited to 'cpukit/score/cpu/arm/include/libcpu/arm-cp15.h')
| -rw-r--r-- | cpukit/score/cpu/arm/include/libcpu/arm-cp15.h | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/cpukit/score/cpu/arm/include/libcpu/arm-cp15.h b/cpukit/score/cpu/arm/include/libcpu/arm-cp15.h index 1e707191cf..c239eaccc8 100644 --- a/cpukit/score/cpu/arm/include/libcpu/arm-cp15.h +++ b/cpukit/score/cpu/arm/include/libcpu/arm-cp15.h @@ -10,7 +10,7 @@ /* * Copyright (c) 2013 Hesham AL-Matary - * Copyright (c) 2009-2017 embedded brains GmbH. All rights reserved. + * Copyright (C) 2009, 2017 embedded brains GmbH & Co. KG * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -1309,15 +1309,17 @@ arm_cp15_data_cache_test_and_clean(void) ); } -/* In DDI0301H_arm1176jzfs_r0p7_trm - * 'MCR p15, 0, <Rd>, c7, c14, 0' means - * Clean and Invalidate Entire Data Cache - */ ARM_CP15_TEXT_SECTION static inline void arm_cp15_data_cache_clean_and_invalidate(void) { ARM_SWITCH_REGISTERS; +#if __ARM_ARCH >= 6 + /* + * In DDI0301H_arm1176jzfs_r0p7_trm + * 'MCR p15, 0, <Rd>, c7, c14, 0' means + * Clean and Invalidate Entire Data Cache + */ uint32_t sbz = 0; __asm__ volatile ( @@ -1328,6 +1330,22 @@ arm_cp15_data_cache_clean_and_invalidate(void) : [sbz] "r" (sbz) : "memory" ); +#else + /* + * Assume this is an ARM926EJ-S. Use the test, clean, and invalidate DCache + * operation. + */ + __asm__ volatile ( + ARM_SWITCH_TO_ARM + "1:\n" + "mrc p15, 0, r15, c7, c14, 3\n" + "bne 1b\n" + ARM_SWITCH_BACK + : ARM_SWITCH_OUTPUT + : + : "memory" + ); +#endif } ARM_CP15_TEXT_SECTION static inline void |