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Diffstat (limited to 'core/include/kernel/tee_misc.h')
-rw-r--r-- | core/include/kernel/tee_misc.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/core/include/kernel/tee_misc.h b/core/include/kernel/tee_misc.h new file mode 100644 index 0000000..14c6ddb --- /dev/null +++ b/core/include/kernel/tee_misc.h @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2014, STMicroelectronics International N.V. + * 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. + */ +#ifndef TEE_MISC_H +#define TEE_MISC_H + +#include <types_ext.h> + +/* + * Macro to derive hex string buffer size from binary buffer size & the + * reverse + */ +#define TEE_B2HS_HSBUF_SIZE(x) ((x) * 2 + 1) +#define TEE_HS2B_BBUF_SIZE(x) ((x + 1) >> 1) + +/* + * binary to hex string buffer + * Returns the number of data bytes written to the hex string + */ +uint32_t tee_b2hs(uint8_t *b, uint8_t *hs, uint32_t blen, uint32_t hslen); + +/* + * hex string to binary buffer + * Returns the number of data bytes written to the bin buffer + */ +uint32_t tee_hs2b(uint8_t *hs, uint8_t *b, uint32_t hslen, uint32_t blen); + +/* + * Is buffer 'b' inside/outside/overlapping area 'a'? + * + * core_is_buffer_inside() - return true if buffer is inside memory area + * core_is_buffer_outside() - return true if buffer is outside area + * core_is_buffer_intersect() - return true if buffer overlaps area + * + * Warning: core_is_buffer_inside(x,x,x,x)==false does NOT mean + * core_is_buffer_outside(x,x,x,x)==true. + * + * Arguments use by each of these routines: + * @b - buffer start address (handled has an unsigned offset) + * @bl - length (in bytes) of the target buffer + * @a - memory area start address (handled has an unsigned offset) + * @al - memory area length (in byte) + */ +#define core_is_buffer_inside(b, bl, a, al) \ + _core_is_buffer_inside((vaddr_t)(b), (size_t)(bl), \ + (vaddr_t)(a), (size_t)(al)) + +#define core_is_buffer_outside(b, bl, a, al) \ + _core_is_buffer_outside((vaddr_t)(b), (size_t)(bl), \ + (vaddr_t)(a), (size_t)(al)) + +#define core_is_buffer_intersect(b, bl, a, al) \ + _core_is_buffer_intersect((vaddr_t)(b), (size_t)(bl), \ + (vaddr_t)(a), (size_t)(al)) + +bool _core_is_buffer_inside(vaddr_t b, size_t bl, vaddr_t a, size_t al); +bool _core_is_buffer_outside(vaddr_t b, size_t bl, vaddr_t a, size_t al); +bool _core_is_buffer_intersect(vaddr_t b, size_t bl, vaddr_t a, size_t al); + +#endif /* TEE_MISC_H */ |