diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-cache.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-cache.S | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-cache.S b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-cache.S new file mode 100644 index 0000000000..f966ab6665 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-cache.S @@ -0,0 +1,106 @@ +/** + * @file + * + * @ingroup mpc55xx_asm + * + * @brief Cache initialization. + */ + +/* + * Copyright (c) 2008-2011 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Obere Lagerstr. 30 + * 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.com/license/LICENSE. + */ + +#include <libcpu/powerpc-utility.h> + +#include <mpc55xx/regs.h> + + .globl mpc55xx_start_cache + + .section ".bsp_start_text", "ax" + +mpc55xx_start_cache: + + /* Load zero, CINV, and CABT) */ + li r0, 0 + li r3, 0x2 + li r4, 0x4 + +#ifdef MPC55XX_HAS_INSTRUCTION_CACHE + +start_instruction_cache_invalidation: + + /* Clear instruction cache invalidation abort */ + mtspr FSL_EIS_L1CSR1, r0 + + /* Start instruction cache invalidation */ + mtspr FSL_EIS_L1CSR1, r3 + +get_instruction_cache_invalidation_status: + + /* Get instruction cache invalidation status */ + mfspr r5, FSL_EIS_L1CSR1 + + /* Check CABT */ + and. r6, r5, r4 + bne start_instruction_cache_invalidation + + /* Check CINV */ + and. r6, r5, r3 + bne get_instruction_cache_invalidation_status + + /* Save instruction cache settings */ + LWI r6, 0x00010001 + isync + msync + mtspr FSL_EIS_L1CSR1, r6 + +#endif /* MPC55XX_HAS_INSTRUCTION_CACHE */ + +#if defined(MPC55XX_HAS_DATA_CACHE) || defined(MPC55XX_HAS_UNIFIED_CACHE) + +start_data_cache_invalidation: + + /* Clear data cache invalidation abort */ + mtspr FSL_EIS_L1CSR0, r0 + + /* Start data cache invalidation */ + mtspr FSL_EIS_L1CSR0, r3 + +get_data_cache_invalidation_status: + + /* Get data cache invalidation status */ + mfspr r5, FSL_EIS_L1CSR0 + + /* Check CABT */ + and. r6, r5, r4 + bne start_data_cache_invalidation + + /* Check CINV */ + and. r6, r5, r3 + bne get_data_cache_invalidation_status + + /* Save data cache settings */ +#if MPC55XX_CHIP_TYPE / 10 != 567 + /* FIXME: CORG??? 0x00180011 */ + LWI r6, 0x00100001 +#else + LWI r6, 0x00190001 +#endif + isync + msync + mtspr FSL_EIS_L1CSR0, r6 + +#endif /* defined(MPC55XX_HAS_DATA_CACHE) || defined(MPC55XX_HAS_UNIFIED_CACHE) */ + + /* Return */ + blr |