Genadi Zawidowski / mbed-dev

mbed library sources. Supersedes mbed-src. Edited target satm32f446 for user USART3 pins

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Fork of mbed-dev by mbed official

targets/TARGET_NUVOTON/TARGET_M480/crypto/crypto-misc.c@182:a56a73fd2a6f, 2018-03-20 (annotated)

Committer:
AnnaBridge
Date:
Tue Mar 20 16:56:18 2018 +0000
Revision:
182:a56a73fd2a6f
Parent:
180:96ed750bd169 
mbed-dev library. Release version 160

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Anna Bridge 180:96ed750bd169 1 /* mbed Microcontroller Library
Anna Bridge 180:96ed750bd169 2 * Copyright (c) 2015-2016 Nuvoton
Anna Bridge 180:96ed750bd169 3 *
Anna Bridge 180:96ed750bd169 4 * Licensed under the Apache License, Version 2.0 (the "License");
Anna Bridge 180:96ed750bd169 5 * you may not use this file except in compliance with the License.
Anna Bridge 180:96ed750bd169 6 * You may obtain a copy of the License at
Anna Bridge 180:96ed750bd169 7 *
Anna Bridge 180:96ed750bd169 8 * http://www.apache.org/licenses/LICENSE-2.0
Anna Bridge 180:96ed750bd169 9 *
Anna Bridge 180:96ed750bd169 10 * Unless required by applicable law or agreed to in writing, software
Anna Bridge 180:96ed750bd169 11 * distributed under the License is distributed on an "AS IS" BASIS,
Anna Bridge 180:96ed750bd169 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Anna Bridge 180:96ed750bd169 13 * See the License for the specific language governing permissions and
Anna Bridge 180:96ed750bd169 14 * limitations under the License.
Anna Bridge 180:96ed750bd169 15 */
Anna Bridge 180:96ed750bd169 16
Anna Bridge 180:96ed750bd169 17
Anna Bridge 180:96ed750bd169 18 #include "cmsis.h"
Anna Bridge 180:96ed750bd169 19 #include "mbed_assert.h"
Anna Bridge 180:96ed750bd169 20 #include "mbed_critical.h"
Anna Bridge 180:96ed750bd169 21 #include "mbed_error.h"
Anna Bridge 180:96ed750bd169 22 #include <limits.h>
Anna Bridge 180:96ed750bd169 23 #include "nu_modutil.h"
Anna Bridge 180:96ed750bd169 24 #include "nu_bitutil.h"
Anna Bridge 180:96ed750bd169 25 #include "crypto-misc.h"
Anna Bridge 180:96ed750bd169 26
Anna Bridge 180:96ed750bd169 27 /* Track if AES H/W is available */
Anna Bridge 180:96ed750bd169 28 static uint16_t crypto_aes_avail = 1;
Anna Bridge 180:96ed750bd169 29 /* Track if DES H/W is available */
Anna Bridge 180:96ed750bd169 30 static uint16_t crypto_des_avail = 1;
Anna Bridge 180:96ed750bd169 31 /* Track if SHA H/W is available */
Anna Bridge 180:96ed750bd169 32 static uint16_t crypto_sha_avail = 1;
AnnaBridge 182:a56a73fd2a6f 33 /* Track if ECC H/W is available */
AnnaBridge 182:a56a73fd2a6f 34 static uint16_t crypto_ecc_avail = 1;
Anna Bridge 180:96ed750bd169 35
Anna Bridge 180:96ed750bd169 36 /* Crypto (AES, DES, SHA, etc.) init counter. Crypto's keeps active as it is non-zero. */
Anna Bridge 180:96ed750bd169 37 static uint16_t crypto_init_counter = 0U;
Anna Bridge 180:96ed750bd169 38
Anna Bridge 180:96ed750bd169 39 static bool crypto_submodule_acquire(uint16_t *submodule_avail);
Anna Bridge 180:96ed750bd169 40 static void crypto_submodule_release(uint16_t *submodule_avail);
Anna Bridge 180:96ed750bd169 41
AnnaBridge 182:a56a73fd2a6f 42 /* Crypto done flags */
AnnaBridge 182:a56a73fd2a6f 43 #define CRYPTO_DONE_OK BIT0 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 44 #define CRYPTO_DONE_ERR BIT1 /* Done with error */
AnnaBridge 182:a56a73fd2a6f 45
Anna Bridge 180:96ed750bd169 46 /* Track if PRNG H/W operation is done */
Anna Bridge 180:96ed750bd169 47 static volatile uint16_t crypto_prng_done;
Anna Bridge 180:96ed750bd169 48 /* Track if AES H/W operation is done */
Anna Bridge 180:96ed750bd169 49 static volatile uint16_t crypto_aes_done;
Anna Bridge 180:96ed750bd169 50 /* Track if DES H/W operation is done */
Anna Bridge 180:96ed750bd169 51 static volatile uint16_t crypto_des_done;
AnnaBridge 182:a56a73fd2a6f 52 /* Track if ECC H/W operation is done */
AnnaBridge 182:a56a73fd2a6f 53 static volatile uint16_t crypto_ecc_done;
Anna Bridge 180:96ed750bd169 54
Anna Bridge 180:96ed750bd169 55 static void crypto_submodule_prestart(volatile uint16_t *submodule_done);
Anna Bridge 180:96ed750bd169 56 static bool crypto_submodule_wait(volatile uint16_t *submodule_done);
Anna Bridge 180:96ed750bd169 57
Anna Bridge 180:96ed750bd169 58 /* As crypto init counter changes from 0 to 1:
Anna Bridge 180:96ed750bd169 59 *
Anna Bridge 180:96ed750bd169 60 * 1. Enable crypto clock
Anna Bridge 180:96ed750bd169 61 * 2. Enable crypto interrupt
Anna Bridge 180:96ed750bd169 62 */
Anna Bridge 180:96ed750bd169 63 void crypto_init(void)
Anna Bridge 180:96ed750bd169 64 {
Anna Bridge 180:96ed750bd169 65 core_util_critical_section_enter();
Anna Bridge 180:96ed750bd169 66 if (crypto_init_counter == USHRT_MAX) {
Anna Bridge 180:96ed750bd169 67 core_util_critical_section_exit();
Anna Bridge 180:96ed750bd169 68 error("Crypto clock enable counter would overflow (> USHRT_MAX)");
Anna Bridge 180:96ed750bd169 69 }
Anna Bridge 180:96ed750bd169 70 core_util_atomic_incr_u16(&crypto_init_counter, 1);
Anna Bridge 180:96ed750bd169 71 if (crypto_init_counter == 1) {
Anna Bridge 180:96ed750bd169 72 SYS_UnlockReg(); // Unlock protected register
Anna Bridge 180:96ed750bd169 73 CLK_EnableModuleClock(CRPT_MODULE);
Anna Bridge 180:96ed750bd169 74 SYS_LockReg(); // Lock protected register
Anna Bridge 180:96ed750bd169 75
Anna Bridge 180:96ed750bd169 76 NVIC_EnableIRQ(CRPT_IRQn);
Anna Bridge 180:96ed750bd169 77 }
Anna Bridge 180:96ed750bd169 78 core_util_critical_section_exit();
Anna Bridge 180:96ed750bd169 79 }
Anna Bridge 180:96ed750bd169 80
Anna Bridge 180:96ed750bd169 81 /* As crypto init counter changes from 1 to 0:
Anna Bridge 180:96ed750bd169 82 *
Anna Bridge 180:96ed750bd169 83 * 1. Disable crypto interrupt
Anna Bridge 180:96ed750bd169 84 * 2. Disable crypto clock
Anna Bridge 180:96ed750bd169 85 */
Anna Bridge 180:96ed750bd169 86 void crypto_uninit(void)
Anna Bridge 180:96ed750bd169 87 {
Anna Bridge 180:96ed750bd169 88 core_util_critical_section_enter();
Anna Bridge 180:96ed750bd169 89 if (crypto_init_counter == 0) {
Anna Bridge 180:96ed750bd169 90 core_util_critical_section_exit();
Anna Bridge 180:96ed750bd169 91 error("Crypto clock enable counter would underflow (< 0)");
Anna Bridge 180:96ed750bd169 92 }
Anna Bridge 180:96ed750bd169 93 core_util_atomic_decr_u16(&crypto_init_counter, 1);
Anna Bridge 180:96ed750bd169 94 if (crypto_init_counter == 0) {
Anna Bridge 180:96ed750bd169 95 NVIC_DisableIRQ(CRPT_IRQn);
Anna Bridge 180:96ed750bd169 96
Anna Bridge 180:96ed750bd169 97 SYS_UnlockReg(); // Unlock protected register
Anna Bridge 180:96ed750bd169 98 CLK_DisableModuleClock(CRPT_MODULE);
Anna Bridge 180:96ed750bd169 99 SYS_LockReg(); // Lock protected register
Anna Bridge 180:96ed750bd169 100 }
Anna Bridge 180:96ed750bd169 101 core_util_critical_section_exit();
Anna Bridge 180:96ed750bd169 102 }
Anna Bridge 180:96ed750bd169 103
Anna Bridge 180:96ed750bd169 104 /* Implementation that should never be optimized out by the compiler */
Anna Bridge 180:96ed750bd169 105 void crypto_zeroize(void *v, size_t n)
Anna Bridge 180:96ed750bd169 106 {
AnnaBridge 182:a56a73fd2a6f 107 volatile unsigned char *p = (volatile unsigned char*) v;
AnnaBridge 182:a56a73fd2a6f 108 while (n--) {
AnnaBridge 182:a56a73fd2a6f 109 *p++ = 0;
AnnaBridge 182:a56a73fd2a6f 110 }
AnnaBridge 182:a56a73fd2a6f 111 }
AnnaBridge 182:a56a73fd2a6f 112
AnnaBridge 182:a56a73fd2a6f 113 /* Implementation that should never be optimized out by the compiler */
AnnaBridge 182:a56a73fd2a6f 114 void crypto_zeroize32(uint32_t *v, size_t n)
AnnaBridge 182:a56a73fd2a6f 115 {
AnnaBridge 182:a56a73fd2a6f 116 volatile uint32_t *p = (volatile uint32_t*) v;
Anna Bridge 180:96ed750bd169 117 while (n--) {
Anna Bridge 180:96ed750bd169 118 *p++ = 0;
Anna Bridge 180:96ed750bd169 119 }
Anna Bridge 180:96ed750bd169 120 }
Anna Bridge 180:96ed750bd169 121
Anna Bridge 180:96ed750bd169 122 bool crypto_aes_acquire(void)
Anna Bridge 180:96ed750bd169 123 {
Anna Bridge 180:96ed750bd169 124 return crypto_submodule_acquire(&crypto_aes_avail);
Anna Bridge 180:96ed750bd169 125 }
Anna Bridge 180:96ed750bd169 126
Anna Bridge 180:96ed750bd169 127 void crypto_aes_release(void)
Anna Bridge 180:96ed750bd169 128 {
Anna Bridge 180:96ed750bd169 129 crypto_submodule_release(&crypto_aes_avail);
Anna Bridge 180:96ed750bd169 130 }
Anna Bridge 180:96ed750bd169 131
Anna Bridge 180:96ed750bd169 132 bool crypto_des_acquire(void)
Anna Bridge 180:96ed750bd169 133 {
Anna Bridge 180:96ed750bd169 134 return crypto_submodule_acquire(&crypto_des_avail);
Anna Bridge 180:96ed750bd169 135 }
Anna Bridge 180:96ed750bd169 136
Anna Bridge 180:96ed750bd169 137 void crypto_des_release(void)
Anna Bridge 180:96ed750bd169 138 {
Anna Bridge 180:96ed750bd169 139 crypto_submodule_release(&crypto_des_avail);
Anna Bridge 180:96ed750bd169 140 }
Anna Bridge 180:96ed750bd169 141
Anna Bridge 180:96ed750bd169 142 bool crypto_sha_acquire(void)
Anna Bridge 180:96ed750bd169 143 {
Anna Bridge 180:96ed750bd169 144 return crypto_submodule_acquire(&crypto_sha_avail);
Anna Bridge 180:96ed750bd169 145 }
Anna Bridge 180:96ed750bd169 146
Anna Bridge 180:96ed750bd169 147 void crypto_sha_release(void)
Anna Bridge 180:96ed750bd169 148 {
Anna Bridge 180:96ed750bd169 149 crypto_submodule_release(&crypto_sha_avail);
Anna Bridge 180:96ed750bd169 150 }
Anna Bridge 180:96ed750bd169 151
AnnaBridge 182:a56a73fd2a6f 152 bool crypto_ecc_acquire(void)
AnnaBridge 182:a56a73fd2a6f 153 {
AnnaBridge 182:a56a73fd2a6f 154 return crypto_submodule_acquire(&crypto_ecc_avail);
AnnaBridge 182:a56a73fd2a6f 155 }
AnnaBridge 182:a56a73fd2a6f 156
AnnaBridge 182:a56a73fd2a6f 157 void crypto_ecc_release(void)
AnnaBridge 182:a56a73fd2a6f 158 {
AnnaBridge 182:a56a73fd2a6f 159 crypto_submodule_release(&crypto_ecc_avail);
AnnaBridge 182:a56a73fd2a6f 160 }
AnnaBridge 182:a56a73fd2a6f 161
Anna Bridge 180:96ed750bd169 162 void crypto_prng_prestart(void)
Anna Bridge 180:96ed750bd169 163 {
Anna Bridge 180:96ed750bd169 164 crypto_submodule_prestart(&crypto_prng_done);
Anna Bridge 180:96ed750bd169 165 }
Anna Bridge 180:96ed750bd169 166
Anna Bridge 180:96ed750bd169 167 bool crypto_prng_wait(void)
Anna Bridge 180:96ed750bd169 168 {
Anna Bridge 180:96ed750bd169 169 return crypto_submodule_wait(&crypto_prng_done);
Anna Bridge 180:96ed750bd169 170 }
Anna Bridge 180:96ed750bd169 171
Anna Bridge 180:96ed750bd169 172 void crypto_aes_prestart(void)
Anna Bridge 180:96ed750bd169 173 {
Anna Bridge 180:96ed750bd169 174 crypto_submodule_prestart(&crypto_aes_done);
Anna Bridge 180:96ed750bd169 175 }
Anna Bridge 180:96ed750bd169 176
Anna Bridge 180:96ed750bd169 177 bool crypto_aes_wait(void)
Anna Bridge 180:96ed750bd169 178 {
Anna Bridge 180:96ed750bd169 179 return crypto_submodule_wait(&crypto_aes_done);
Anna Bridge 180:96ed750bd169 180 }
Anna Bridge 180:96ed750bd169 181
Anna Bridge 180:96ed750bd169 182 void crypto_des_prestart(void)
Anna Bridge 180:96ed750bd169 183 {
Anna Bridge 180:96ed750bd169 184 crypto_submodule_prestart(&crypto_des_done);
Anna Bridge 180:96ed750bd169 185 }
Anna Bridge 180:96ed750bd169 186
Anna Bridge 180:96ed750bd169 187 bool crypto_des_wait(void)
Anna Bridge 180:96ed750bd169 188 {
Anna Bridge 180:96ed750bd169 189 return crypto_submodule_wait(&crypto_des_done);
Anna Bridge 180:96ed750bd169 190 }
Anna Bridge 180:96ed750bd169 191
AnnaBridge 182:a56a73fd2a6f 192 void crypto_ecc_prestart(void)
AnnaBridge 182:a56a73fd2a6f 193 {
AnnaBridge 182:a56a73fd2a6f 194 crypto_submodule_prestart(&crypto_ecc_done);
AnnaBridge 182:a56a73fd2a6f 195 }
AnnaBridge 182:a56a73fd2a6f 196
AnnaBridge 182:a56a73fd2a6f 197 bool crypto_ecc_wait(void)
AnnaBridge 182:a56a73fd2a6f 198 {
AnnaBridge 182:a56a73fd2a6f 199 return crypto_submodule_wait(&crypto_ecc_done);
AnnaBridge 182:a56a73fd2a6f 200 }
AnnaBridge 182:a56a73fd2a6f 201
Anna Bridge 180:96ed750bd169 202 bool crypto_dma_buff_compat(const void *buff, size_t buff_size, size_t size_aligned_to)
Anna Bridge 180:96ed750bd169 203 {
Anna Bridge 180:96ed750bd169 204 uint32_t buff_ = (uint32_t) buff;
Anna Bridge 180:96ed750bd169 205
Anna Bridge 180:96ed750bd169 206 return (((buff_ & 0x03) == 0) && /* Word-aligned buffer base address */
Anna Bridge 180:96ed750bd169 207 ((buff_size & (size_aligned_to - 1)) == 0) && /* Crypto submodule dependent buffer size alignment */
Anna Bridge 180:96ed750bd169 208 (((buff_ >> 28) == 0x2) && (buff_size <= (0x30000000 - buff_)))); /* 0x20000000-0x2FFFFFFF */
Anna Bridge 180:96ed750bd169 209 }
Anna Bridge 180:96ed750bd169 210
Anna Bridge 180:96ed750bd169 211 /* Overlap cases
Anna Bridge 180:96ed750bd169 212 *
Anna Bridge 180:96ed750bd169 213 * 1. in_buff in front of out_buff:
Anna Bridge 180:96ed750bd169 214 *
Anna Bridge 180:96ed750bd169 215 * in in_end
Anna Bridge 180:96ed750bd169 216 * | |
Anna Bridge 180:96ed750bd169 217 * ||||||||||||||||
Anna Bridge 180:96ed750bd169 218 * ||||||||||||||||
Anna Bridge 180:96ed750bd169 219 * | |
Anna Bridge 180:96ed750bd169 220 * out out_end
Anna Bridge 180:96ed750bd169 221 *
Anna Bridge 180:96ed750bd169 222 * 2. out_buff in front of in_buff:
Anna Bridge 180:96ed750bd169 223 *
Anna Bridge 180:96ed750bd169 224 * in in_end
Anna Bridge 180:96ed750bd169 225 * | |
Anna Bridge 180:96ed750bd169 226 * ||||||||||||||||
Anna Bridge 180:96ed750bd169 227 * ||||||||||||||||
Anna Bridge 180:96ed750bd169 228 * | |
Anna Bridge 180:96ed750bd169 229 * out out_end
Anna Bridge 180:96ed750bd169 230 */
Anna Bridge 180:96ed750bd169 231 bool crypto_dma_buffs_overlap(const void *in_buff, size_t in_buff_size, const void *out_buff, size_t out_buff_size)
Anna Bridge 180:96ed750bd169 232 {
Anna Bridge 180:96ed750bd169 233 uint32_t in = (uint32_t) in_buff;
Anna Bridge 180:96ed750bd169 234 uint32_t in_end = in + in_buff_size;
Anna Bridge 180:96ed750bd169 235 uint32_t out = (uint32_t) out_buff;
Anna Bridge 180:96ed750bd169 236 uint32_t out_end = out + out_buff_size;
Anna Bridge 180:96ed750bd169 237
Anna Bridge 180:96ed750bd169 238 bool overlap = (in <= out && out < in_end) || (out <= in && in < out_end);
Anna Bridge 180:96ed750bd169 239
Anna Bridge 180:96ed750bd169 240 return overlap;
Anna Bridge 180:96ed750bd169 241 }
Anna Bridge 180:96ed750bd169 242
Anna Bridge 180:96ed750bd169 243 static bool crypto_submodule_acquire(uint16_t *submodule_avail)
Anna Bridge 180:96ed750bd169 244 {
Anna Bridge 180:96ed750bd169 245 uint16_t expectedCurrentValue = 1;
Anna Bridge 180:96ed750bd169 246 return core_util_atomic_cas_u16(submodule_avail, &expectedCurrentValue, 0);
Anna Bridge 180:96ed750bd169 247 }
Anna Bridge 180:96ed750bd169 248
Anna Bridge 180:96ed750bd169 249 static void crypto_submodule_release(uint16_t *submodule_avail)
Anna Bridge 180:96ed750bd169 250 {
Anna Bridge 180:96ed750bd169 251 uint16_t expectedCurrentValue = 0;
Anna Bridge 180:96ed750bd169 252 while (! core_util_atomic_cas_u16(submodule_avail, &expectedCurrentValue, 1));
Anna Bridge 180:96ed750bd169 253 }
Anna Bridge 180:96ed750bd169 254
Anna Bridge 180:96ed750bd169 255 static void crypto_submodule_prestart(volatile uint16_t *submodule_done)
Anna Bridge 180:96ed750bd169 256 {
Anna Bridge 180:96ed750bd169 257 *submodule_done = 0;
Anna Bridge 180:96ed750bd169 258
Anna Bridge 180:96ed750bd169 259 /* Ensure memory accesses above are completed before DMA is started
Anna Bridge 180:96ed750bd169 260 *
Anna Bridge 180:96ed750bd169 261 * Replacing __DSB() with __DMB() is also OK in this case.
Anna Bridge 180:96ed750bd169 262 *
Anna Bridge 180:96ed750bd169 263 * Refer to "multi-master systems" section with DMA in:
Anna Bridge 180:96ed750bd169 264 * https://static.docs.arm.com/dai0321/a/DAI0321A_programming_guide_memory_barriers_for_m_profile.pdf
Anna Bridge 180:96ed750bd169 265 */
Anna Bridge 180:96ed750bd169 266 __DSB();
Anna Bridge 180:96ed750bd169 267 }
Anna Bridge 180:96ed750bd169 268
Anna Bridge 180:96ed750bd169 269 static bool crypto_submodule_wait(volatile uint16_t *submodule_done)
Anna Bridge 180:96ed750bd169 270 {
Anna Bridge 180:96ed750bd169 271 while (! *submodule_done);
Anna Bridge 180:96ed750bd169 272
Anna Bridge 180:96ed750bd169 273 /* Ensure while loop above and subsequent code are not reordered */
Anna Bridge 180:96ed750bd169 274 __DSB();
Anna Bridge 180:96ed750bd169 275
AnnaBridge 182:a56a73fd2a6f 276 if ((*submodule_done & CRYPTO_DONE_OK)) {
AnnaBridge 182:a56a73fd2a6f 277 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 278 return true;
AnnaBridge 182:a56a73fd2a6f 279 } else if ((*submodule_done & CRYPTO_DONE_ERR)) {
AnnaBridge 182:a56a73fd2a6f 280 /* Done with error */
AnnaBridge 182:a56a73fd2a6f 281 return false;
AnnaBridge 182:a56a73fd2a6f 282 }
AnnaBridge 182:a56a73fd2a6f 283
AnnaBridge 182:a56a73fd2a6f 284 return false;
Anna Bridge 180:96ed750bd169 285 }
Anna Bridge 180:96ed750bd169 286
Anna Bridge 180:96ed750bd169 287 /* Crypto interrupt handler */
Anna Bridge 180:96ed750bd169 288 void CRYPTO_IRQHandler()
Anna Bridge 180:96ed750bd169 289 {
AnnaBridge 182:a56a73fd2a6f 290 uint32_t intsts;
AnnaBridge 182:a56a73fd2a6f 291
AnnaBridge 182:a56a73fd2a6f 292 if ((intsts = PRNG_GET_INT_FLAG()) != 0) {
AnnaBridge 182:a56a73fd2a6f 293 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 294 crypto_prng_done |= CRYPTO_DONE_OK;
AnnaBridge 182:a56a73fd2a6f 295 /* Clear interrupt flag */
Anna Bridge 180:96ed750bd169 296 PRNG_CLR_INT_FLAG();
AnnaBridge 182:a56a73fd2a6f 297 } else if ((intsts = AES_GET_INT_FLAG()) != 0) {
AnnaBridge 182:a56a73fd2a6f 298 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 299 crypto_aes_done |= CRYPTO_DONE_OK;
AnnaBridge 182:a56a73fd2a6f 300 /* Clear interrupt flag */
Anna Bridge 180:96ed750bd169 301 AES_CLR_INT_FLAG();
AnnaBridge 182:a56a73fd2a6f 302 } else if ((intsts = TDES_GET_INT_FLAG()) != 0) {
AnnaBridge 182:a56a73fd2a6f 303 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 304 crypto_des_done |= CRYPTO_DONE_OK;
AnnaBridge 182:a56a73fd2a6f 305 /* Clear interrupt flag */
Anna Bridge 180:96ed750bd169 306 TDES_CLR_INT_FLAG();
AnnaBridge 182:a56a73fd2a6f 307 } else if ((intsts = ECC_GET_INT_FLAG()) != 0) {
AnnaBridge 182:a56a73fd2a6f 308 /* Check interrupt flags */
AnnaBridge 182:a56a73fd2a6f 309 if (intsts & CRPT_INTSTS_ECCIF_Msk) {
AnnaBridge 182:a56a73fd2a6f 310 /* Done with OK */
AnnaBridge 182:a56a73fd2a6f 311 crypto_ecc_done |= CRYPTO_DONE_OK;
AnnaBridge 182:a56a73fd2a6f 312 } else if (intsts & CRPT_INTSTS_ECCEIF_Msk) {
AnnaBridge 182:a56a73fd2a6f 313 /* Done with error */
AnnaBridge 182:a56a73fd2a6f 314 crypto_ecc_done |= CRYPTO_DONE_ERR;
AnnaBridge 182:a56a73fd2a6f 315 }
AnnaBridge 182:a56a73fd2a6f 316 /* Clear interrupt flag */
AnnaBridge 182:a56a73fd2a6f 317 ECC_CLR_INT_FLAG();
Anna Bridge 180:96ed750bd169 318 }
Anna Bridge 180:96ed750bd169 319 }