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/**
* @file
*
* @ingroup mpc55xx_asm
*
* @brief Cache initialization.
*/
/*
* Copyright (c) 2008-2012 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.org/license/LICENSE.
*/
#include <libcpu/powerpc-utility.h>
#include <mpc55xx/regs.h>
.globl mpc55xx_start_cache
.section ".bsp_start_text", "ax"
mpc55xx_start_cache:
#ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT
/* Load zero, CINV, and CABT) */
li r0, 0
li r3, 0x2
li r4, 0x4
#if defined(BSP_INSTRUCTION_CACHE_ENABLED) \
&& defined(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
#if (defined(BSP_DATA_CACHE_ENABLED) && defined(MPC55XX_HAS_DATA_CACHE)) \
|| ((defined(BSP_DATA_CACHE_ENABLED) \
|| defined(BSP_INSTRUCTION_CACHE_ENABLED)) \
&& 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_FAMILY != 567
/* FIXME: CORG??? 0x00180011 */
LWI r6, 0x00100001
#else
LWI r6, 0x00190001
#endif
isync
msync
mtspr FSL_EIS_L1CSR0, r6
#endif
#endif /* MPC55XX_NEEDS_LOW_LEVEL_INIT */
/* Return */
blr
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