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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-05-02 17:40:45 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-05-03 17:30:54 +0200 |
| commit | d2d0296138aced3ccc0828dc1a109b1df61f1bbb (patch) | |
| tree | 16e686379e4f7a5355d80bae976f9472d916b5e0 | |
| parent | bsps/arm: Add and use bsp_translation_table_base (diff) | |
| download | rtems-d2d0296138aced3ccc0828dc1a109b1df61f1bbb.tar.bz2 | |
bsps/arm: Add arm_cp15_get_min_cache_line_size()
| -rw-r--r-- | c/src/lib/libcpu/arm/shared/include/arm-cp15.h | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h index 017c0e3cd0..7f7249f311 100644 --- a/c/src/lib/libcpu/arm/shared/include/arm-cp15.h +++ b/c/src/lib/libcpu/arm/shared/include/arm-cp15.h @@ -7,12 +7,13 @@ */ /* - * Copyright (c) 2009, 2010 - * embedded brains GmbH - * Obere Lagerstr. 30 - * D-82178 Puchheim - * Germany - * <rtems@embedded-brains.de> + * Copyright (c) 2009-2013 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <info@embedded-brains.de> * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at @@ -443,6 +444,25 @@ static inline uint32_t arm_cp15_get_cache_type(void) return val; } +static inline uint32_t arm_cp15_get_min_cache_line_size(void) +{ + uint32_t mcls = 0; + uint32_t ct = arm_cp15_get_cache_type(); + uint32_t format = (ct >> 29) & 0x7U; + + if (format == 0x4) { + mcls = (1U << (ct & 0xf)) * 4; + } else if (format == 0x0) { + uint32_t mask = (1U << 12) - 1; + uint32_t dcls = (ct >> 12) & mask; + uint32_t icls = ct & mask; + + mcls = dcls <= icls ? dcls : icls; + } + + return mcls; +} + static inline void arm_cp15_cache_invalidate(void) { ARM_SWITCH_REGISTERS; |