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Diffstat (limited to 'core/arch/arm/tee/cache.c')
-rw-r--r-- | core/arch/arm/tee/cache.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/core/arch/arm/tee/cache.c b/core/arch/arm/tee/cache.c new file mode 100644 index 0000000..ff4bab3 --- /dev/null +++ b/core/arch/arm/tee/cache.c @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2014, STMicroelectronics International N.V. + * Copyright (c) 2015, Linaro Limited + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <mm/core_memprot.h> +#include <mm/core_mmu.h> +#include <tee/cache.h> + +/* + * tee_uta_cache_operation - dynamic cache clean/inval request from a TA. + * It follows ARM recommendation: + * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0246d/Beicdhde.html + * Note that this implementation assumes dsb operations are part of + * cache_op_inner(), and outer cache sync are part of cache_op_outer(). + */ +TEE_Result cache_operation(enum utee_cache_operation op, void *va, size_t len) +{ + TEE_Result res; + paddr_t pa; + + pa = virt_to_phys(va); + if (!pa) + return TEE_ERROR_ACCESS_DENIED; + + switch (op) { + case TEE_CACHEFLUSH: +#ifdef CFG_PL310 /* prevent initial L1 clean in case there is no outer L2 */ + /* Clean L1, Flush L2, Flush L1 */ + res = cache_op_inner(DCACHE_AREA_CLEAN, va, len); + if (res != TEE_SUCCESS) + return res; + res = cache_op_outer(DCACHE_AREA_CLEAN_INV, pa, len); + if (res != TEE_SUCCESS) + return res; +#endif + return cache_op_inner(DCACHE_AREA_CLEAN_INV, va, len); + + case TEE_CACHECLEAN: + /* Clean L1, Clean L2 */ + res = cache_op_inner(DCACHE_AREA_CLEAN, va, len); + if (res != TEE_SUCCESS) + return res; + return cache_op_outer(DCACHE_AREA_CLEAN, pa, len); + + case TEE_CACHEINVALIDATE: + /* Inval L2, Inval L1 */ + res = cache_op_outer(DCACHE_AREA_INVALIDATE, pa, len); + if (res != TEE_SUCCESS) + return res; + return cache_op_inner(DCACHE_AREA_INVALIDATE, va, len); + + default: + return TEE_ERROR_NOT_SUPPORTED; + } +} |