1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef TEE_MISC_H 28 #define TEE_MISC_H 29 30 #include <kernel/tee_common_unpg.h> 31 #include <types_ext.h> 32 33 /* 34 * Macro to derive hex string buffer size from binary buffer size & the 35 * reverse 36 */ 37 #define TEE_B2HS_HSBUF_SIZE(x) ((x) * 2 + 1) 38 #define TEE_HS2B_BBUF_SIZE(x) ((x + 1) >> 1) 39 40 /* 41 * binary to hex string buffer 42 * Returns the number of data bytes written to the hex string 43 */ 44 uint32_t tee_b2hs(uint8_t *b, uint8_t *hs, uint32_t blen, uint32_t hslen); 45 46 /* 47 * hex string to binary buffer 48 * Returns the number of data bytes written to the bin buffer 49 */ 50 uint32_t tee_hs2b(uint8_t *hs, uint8_t *b, uint32_t hslen, uint32_t blen); 51 52 /* 53 * Is buffer 'b' inside/outside/overlapping area 'a'? 54 * 55 * core_is_buffer_inside() - return true if buffer is inside memory area 56 * core_is_buffer_outside() - return true if buffer is outside area 57 * core_is_buffer_intersect() - return true if buffer overlaps area 58 * 59 * Warning: core_is_buffer_inside(x,x,x,x)==false does NOT mean 60 * core_is_buffer_outside(x,x,x,x)==true. 61 * 62 * Arguments use by each of these routines: 63 * @b - buffer start address (handled has an unsigned offset) 64 * @bl - length (in bytes) of the target buffer 65 * @a - memory area start address (handled has an unsigned offset) 66 * @al - memory area length (in byte) 67 */ 68 #define core_is_buffer_inside(b, bl, a, al) \ 69 _core_is_buffer_inside((vaddr_t)(b), (size_t)(bl), \ 70 (vaddr_t)(a), (size_t)(al)) 71 72 #define core_is_buffer_outside(b, bl, a, al) \ 73 _core_is_buffer_outside((vaddr_t)(b), (size_t)(bl), \ 74 (vaddr_t)(a), (size_t)(al)) 75 76 #define core_is_buffer_intersect(b, bl, a, al) \ 77 _core_is_buffer_intersect((vaddr_t)(b), (size_t)(bl), \ 78 (vaddr_t)(a), (size_t)(al)) 79 80 bool _core_is_buffer_inside(vaddr_t b, size_t bl, vaddr_t a, size_t al); 81 bool _core_is_buffer_outside(vaddr_t b, size_t bl, vaddr_t a, size_t al); 82 bool _core_is_buffer_intersect(vaddr_t b, size_t bl, vaddr_t a, size_t al); 83 84 #endif /* TEE_MISC_H */ 85