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- #include "fsl_rnga.h"
- #if defined(FSL_FEATURE_SOC_RNG_COUNT) && FSL_FEATURE_SOC_RNG_COUNT
- #define RNG_CR_REG(base) ((base)->CR)
- #define RNG_RD_CR(base) (RNG_CR_REG(base))
- #define RNG_WR_CR(base, value) (RNG_CR_REG(base) = (value))
- #define RNG_RMW_CR(base, mask, value) (RNG_WR_CR(base, (RNG_RD_CR(base) & ~(mask)) | (value)))
- #define RNG_RD_CR_GO(base) ((RNG_CR_REG(base) & RNG_CR_GO_MASK) >> RNG_CR_GO_SHIFT)
- #define RNG_WR_CR_GO(base, value) (RNG_RMW_CR(base, RNG_CR_GO_MASK, RNG_CR_GO(value)))
- #define RNG_RD_CR_SLP(base) ((RNG_CR_REG(base) & RNG_CR_SLP_MASK) >> RNG_CR_SLP_SHIFT)
- #define RNG_WR_CR_SLP(base, value) (RNG_RMW_CR(base, RNG_CR_SLP_MASK, RNG_CR_SLP(value)))
- #define RNG_SR_REG(base) ((base)->SR)
- #define RNG_RD_SR_OREG_LVL(base) ((RNG_SR_REG(base) & RNG_SR_OREG_LVL_MASK) >> RNG_SR_OREG_LVL_SHIFT)
- #define RNG_RD_SR_SLP(base) ((RNG_SR_REG(base) & RNG_SR_SLP_MASK) >> RNG_SR_SLP_SHIFT)
- #define RNG_OR_REG(base) ((base)->OR)
- #define RNG_RD_OR(base) (RNG_OR_REG(base))
- #define RNG_ER_REG(base) ((base)->ER)
- #define RNG_RD_ER(base) (RNG_ER_REG(base))
- #define RNG_WR_ER(base, value) (RNG_ER_REG(base) = (value))
- static uint32_t rnga_ReadEntropy(RNG_Type *base);
- void RNGA_Init(RNG_Type *base)
- {
- #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
-
- CLOCK_EnableClock(kCLOCK_Rnga0);
- #endif
- CLOCK_DisableClock(kCLOCK_Rnga0);
- #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
- CLOCK_EnableClock(kCLOCK_Rnga0);
- #endif
-
- RNG_WR_CR(base, 0);
-
- RNG_WR_CR_GO(base, 1);
- }
- void RNGA_Deinit(RNG_Type *base)
- {
- #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
-
- CLOCK_DisableClock(kCLOCK_Rnga0);
- #endif
- }
- static uint32_t rnga_ReadEntropy(RNG_Type *base)
- {
- uint32_t data = 0;
- if (RNGA_GetMode(base) == kRNGA_ModeNormal)
- {
-
- while (RNG_RD_SR_OREG_LVL(base) == 0)
- {
- }
- data = RNG_RD_OR(base);
- }
-
- return data;
- }
- status_t RNGA_GetRandomData(RNG_Type *base, void *data, size_t data_size)
- {
- status_t result = kStatus_Success;
- uint32_t random_32;
- uint8_t *random_p;
- uint32_t random_size;
- uint8_t *data_p = (uint8_t *)data;
- uint32_t i;
-
- if (base && data && data_size)
- {
- do
- {
-
- random_32 = rnga_ReadEntropy(base);
- random_p = (uint8_t *)&random_32;
- if (data_size < sizeof(random_32))
- {
- random_size = data_size;
- }
- else
- {
- random_size = sizeof(random_32);
- }
- for (i = 0; i < random_size; i++)
- {
- *data_p++ = *random_p++;
- }
- data_size -= random_size;
- } while (data_size > 0);
- }
- else
- {
- result = kStatus_InvalidArgument;
- }
- return result;
- }
- void RNGA_SetMode(RNG_Type *base, rnga_mode_t mode)
- {
- RNG_WR_CR_SLP(base, (uint32_t)mode);
- }
- rnga_mode_t RNGA_GetMode(RNG_Type *base)
- {
- return (rnga_mode_t)RNG_RD_SR_SLP(base);
- }
- void RNGA_Seed(RNG_Type *base, uint32_t seed)
- {
-
- RNG_WR_ER(base, seed);
- }
- #endif
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