2 * Copyright (c) 2014, STMicroelectronics International N.V.
3 * Copyright (c) 2015, Linaro Limited
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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29 #include <mm/core_memprot.h>
30 #include <mm/core_mmu.h>
31 #include <tee/cache.h>
34 * tee_uta_cache_operation - dynamic cache clean/inval request from a TA.
35 * It follows ARM recommendation:
36 * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0246d/Beicdhde.html
37 * Note that this implementation assumes dsb operations are part of
38 * cache_op_inner(), and outer cache sync are part of cache_op_outer().
40 TEE_Result cache_operation(enum utee_cache_operation op, void *va, size_t len)
45 pa = virt_to_phys(va);
47 return TEE_ERROR_ACCESS_DENIED;
51 #ifdef CFG_PL310 /* prevent initial L1 clean in case there is no outer L2 */
52 /* Clean L1, Flush L2, Flush L1 */
53 res = cache_op_inner(DCACHE_AREA_CLEAN, va, len);
54 if (res != TEE_SUCCESS)
56 res = cache_op_outer(DCACHE_AREA_CLEAN_INV, pa, len);
57 if (res != TEE_SUCCESS)
60 return cache_op_inner(DCACHE_AREA_CLEAN_INV, va, len);
63 /* Clean L1, Clean L2 */
64 res = cache_op_inner(DCACHE_AREA_CLEAN, va, len);
65 if (res != TEE_SUCCESS)
67 return cache_op_outer(DCACHE_AREA_CLEAN, pa, len);
69 case TEE_CACHEINVALIDATE:
70 /* Inval L2, Inval L1 */
71 res = cache_op_outer(DCACHE_AREA_INVALIDATE, pa, len);
72 if (res != TEE_SUCCESS)
74 return cache_op_inner(DCACHE_AREA_INVALIDATE, va, len);
77 return TEE_ERROR_NOT_SUPPORTED;