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esp32h2: Enable ECC accelerator

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This commit is contained in:
Sachin Parekh
2022-06-21 12:28:34 +05:30
parent aa786b34c2
commit 6cfc9c365f
8 changed files with 421 additions and 104 deletions
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6
components/hal/esp32h2/include/hal/clk_gate_ll.h
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@@ -55,6 +55,8 @@ static inline uint32_t periph_ll_get_clk_en_mask(periph_module_t periph)
return SYSTEM_CRYPTO_AES_CLK_EN;
case PERIPH_SHA_MODULE:
return SYSTEM_CRYPTO_SHA_CLK_EN;
case PERIPH_ECC_MODULE:
return SYSTEM_CRYPTO_ECC_CLK_EN;
case PERIPH_RSA_MODULE:
return SYSTEM_CRYPTO_RSA_CLK_EN;
case PERIPH_HMAC_MODULE:
@@ -108,6 +110,8 @@ static inline uint32_t periph_ll_get_rst_en_mask(periph_module_t periph, bool en
return SYSTEM_CRYPTO_HMAC_RST;
case PERIPH_TEMPSENSOR_MODULE:
return SYSTEM_TSENS_RST;
case PERIPH_ECC_MODULE:
return SYSTEM_CRYPTO_ECC_RST;
case PERIPH_AES_MODULE:
if (enable == true) {
// Clear reset on digital signature, otherwise AES unit is held in reset also.
@@ -147,6 +151,7 @@ static uint32_t periph_ll_get_clk_en_reg(periph_module_t periph)
case PERIPH_AES_MODULE:
case PERIPH_RSA_MODULE:
case PERIPH_SHA_MODULE:
case PERIPH_ECC_MODULE:
case PERIPH_GDMA_MODULE:
case PERIPH_TEMPSENSOR_MODULE:
return SYSTEM_PERIP_CLK_EN1_REG;
@@ -165,6 +170,7 @@ static uint32_t periph_ll_get_rst_en_reg(periph_module_t periph)
case PERIPH_AES_MODULE:
case PERIPH_RSA_MODULE:
case PERIPH_SHA_MODULE:
case PERIPH_ECC_MODULE:
case PERIPH_GDMA_MODULE:
case PERIPH_TEMPSENSOR_MODULE:
return SYSTEM_PERIP_RST_EN1_REG;

147
components/hal/esp32h2/include/hal/ecc_ll.h Normal file
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@@ -0,0 +1,147 @@
/*
* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdbool.h>
#include <string.h>
#include "hal/assert.h"
#include "rev2/soc/ecc_mult_reg.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
ECC_PARAM_PX = 0x0,
ECC_PARAM_PY,
ECC_PARAM_K,
} ecc_ll_param_t;
static inline void ecc_ll_enable_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_ENA_REG, ECC_MULT_CALC_DONE_INT_ENA, 1);
}
static inline void ecc_ll_disable_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_ENA_REG, ECC_MULT_CALC_DONE_INT_ENA, 0);
}
static inline void ecc_ll_clear_interrupt(void)
{
REG_SET_FIELD(ECC_MULT_INT_CLR_REG, ECC_MULT_CALC_DONE_INT_CLR, 1);
}
static inline void ecc_ll_set_mode(ecc_mode_t mode)
{
switch(mode) {
case ECC_MODE_POINT_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 0);
break;
case ECC_MODE_INVERSE_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 1);
break;
case ECC_MODE_VERIFY:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 2);
break;
case ECC_MODE_VERIFY_THEN_POINT_MUL:
REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE, 3);
break;
default:
HAL_ASSERT(false && "Unsupported mode");
break;
}
}
static inline void ecc_ll_set_curve(ecc_curve_t curve)
{
switch(curve) {
case ECC_CURVE_SECP256R1:
REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
break;
case ECC_CURVE_SECP192R1:
REG_CLR_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
break;
default:
HAL_ASSERT(false && "Unsupported curve");
return;
}
}
static inline void ecc_ll_write_param(ecc_ll_param_t param, const uint8_t *buf, uint16_t len)
{
uint32_t reg;
uint32_t word;
switch (param) {
case ECC_PARAM_PX:
reg = ECC_MULT_PX_1_REG;
break;
case ECC_PARAM_PY:
reg = ECC_MULT_PY_1_REG;
break;
case ECC_PARAM_K:
reg = ECC_MULT_K_1_REG;
break;
default:
HAL_ASSERT(false && "Invalid parameter");
return;
}
for (int i = 0; i < len; i += 4) {
memcpy(&word, buf + i, 4);
REG_WRITE(reg + i, word);
}
}
static inline void ecc_ll_start_calc(void)
{
REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_START);
}
static inline int ecc_ll_is_calc_finished(void)
{
return REG_GET_FIELD(ECC_MULT_INT_RAW_REG, ECC_MULT_CALC_DONE_INT_RAW);
}
static inline ecc_mode_t ecc_ll_get_mode(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_WORK_MODE);
}
static inline int ecc_ll_get_verification_result(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_VERIFICATION_RESULT);
}
static inline ecc_curve_t ecc_ll_get_curve(void)
{
return REG_GET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
}
static inline void ecc_ll_read_param(ecc_ll_param_t param, uint8_t *buf, uint16_t len)
{
uint32_t reg;
switch (param) {
case ECC_PARAM_PX:
reg = ECC_MULT_PX_1_REG;
break;
case ECC_PARAM_PY:
reg = ECC_MULT_PY_1_REG;
break;
case ECC_PARAM_K:
reg = ECC_MULT_K_1_REG;
break;
default:
HAL_ASSERT(false && "Invalid parameter");
return;
}
memcpy(buf, (void *)reg, len);
}
#ifdef __cplusplus
}
#endif