Added support for STM32WB PKA HW accelerator (ECDSA verify)

Makefile

@@ -12,6 +12,8 @@ KINETIS_CPU=MK64FN1M0VLL12
 KINETIS_DRIVERS?=$(KINETIS)/devices/MK64F12
 KINETIS_CMSIS?=$(KINETIS)/CMSIS
 FREEDOM_E_SDK?=$(HOME)/src/freedom-e-sdk
+STM32CUBE?=$(HOME)/src/STM32CubeWB/STM32Cube_FW_WB_V1.2.0
+
 DEBUG?=0
 VTOR?=1
 CORTEX_M0?=0
@@ -25,8 +27,7 @@ V?=0
 SPMATH?=1
 RAM_CODE?=0
 DUALBANK_SWAP=0
-
+PKA?=1
-
 
 ## Initializers
 CFLAGS:=-D__WOLFBOOT  -DWOLFBOOT_VERSION=$(WOLFBOOT_VERSION)UL
@@ -155,7 +156,7 @@ test-app/image.bin:
     V=$(V) RAM_CODE=$(RAM_CODE) WOLFBOOT_VERSION=$(WOLFBOOT_VERSION)\
 	KINETIS=$(KINETIS) KINETIS_CPU=$(KINETIS_CPU) KINETIS_DRIVERS=$(KINETIS_DRIVERS) \
 	KINETIS_CMSIS=$(KINETIS_CMSIS) NVM_FLASH_WRITEONCE=$(NVM_FLASH_WRITEONCE) \
-	FREEDOM_E_SDK=$(FREEDOM_E_SDK)
+	FREEDOM_E_SDK=$(FREEDOM_E_SDK) STM32CUBE=$(STM32CUBE) PKA=$(PKA)
 	@rm -f src/*.o hal/*.o
 	@$(SIZE) test-app/image.elf
 

arch.mk

@@ -87,6 +87,22 @@ SIZE:=$(CROSS_COMPILE)size
 BOOT_IMG?=test-app/image.bin
 
 
+## Hardware PKA
+
+ifeq ($(TARGET),stm32wb)
+  ifneq ($(PKA),0)
+    ECC_EXTRA_OBJS+= $(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Src/stm32wbxx_hal_pka.o  ./lib/wolfssl/wolfcrypt/src/port/st/stm32.o
+    ECC_EXTRA_CFLAGS+=-DWOLFSSL_STM32_PKA -I$(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Inc \
+        -Isrc -I$(STM32CUBE)/Drivers/BSP/P-NUCLEO-WB55.Nucleo/ -I$(STM32CUBE)/Drivers/CMSIS/Device/ST/STM32WBxx/Include \
+        -I$(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Inc/ \
+        -I$(STM32CUBE)/Drivers/CMSIS/Include \
+		-Ihal \
+	    -DSTM32WB55xx
+  endif
+endif
+
+
+
 ifeq ($(TARGET),kinetis)
   CFLAGS+= -I$(KINETIS_DRIVERS)/drivers -I$(KINETIS_DRIVERS) -DCPU_$(KINETIS_CPU) -I$(KINETIS_CMSIS)/Include -DDEBUG_CONSOLE_ASSERT_DISABLE=1
   OBJS+= $(KINETIS_DRIVERS)/drivers/fsl_clock.o $(KINETIS_DRIVERS)/drivers/fsl_ftfx_flash.o $(KINETIS_DRIVERS)/drivers/fsl_ftfx_cache.o $(KINETIS_DRIVERS)/drivers/fsl_ftfx_controller.o

hal/stm32wb.c

@@ -21,6 +21,10 @@
 
 #include <stdint.h>
 #include <image.h>
+#ifdef WOLFSSL_STM32_PKA
+#include "stm32wbxx_hal.h"
+PKA_HandleTypeDef hpka = { };
+#endif
 /* STM32 WB register configuration */
 
 /* Assembly helpers */
@@ -286,6 +290,11 @@ static void clock_pll_on(void)
 void hal_init(void)
 {
     clock_pll_on();
+#ifdef WOLFSSL_STM32_PKA
+    __HAL_RCC_PKA_CLK_ENABLE();
+    hpka.Instance = PKA;
+    HAL_PKA_Init(&hpka);
+#endif
 }
 
 void hal_prepare_boot(void)
@@ -297,3 +306,26 @@ void hal_prepare_boot(void)
     clock_pll_off();
 }
 
+#ifdef WOLFSSL_STM32_PKA
+
+
+void HAL_PKA_MspInit(PKA_HandleTypeDef* hpka)
+{
+  if(hpka->Instance==PKA)
+  {
+    /* Peripheral clock enable */
+    __HAL_RCC_PKA_CLK_ENABLE();
+  }
+}
+
+/* This value is unused, the function is never called
+ * as long as the timeout is 0xFFFFFFFF. 
+ * It is defined here only to avoid a compiler error 
+ * for a missing symbol in hal_pka_driver.
+ */
+uint32_t HAL_GetTick(void)
+{
+    return 0;
+}
+
+#endif

lib/wolfssl

@@ -1 +1 @@
-Subproject commit 50fbdb961fd8c2d8123064e567ae8ec44167732d
+Subproject commit c26a7ccb6818683fff8bdad729d6de9afff91188