hw/misc: implement ESP32-S3 Digital Signature

Co-authored-by: Harshal Patil <harshal.patil@espressif.com>

hw/misc/esp32s3_ds.c

@@ -0,0 +1,34 @@
+/*
+ * ESP32S3 Digital Signature emulation
+ *
+ * Copyright (c) 2023 Espressif Systems (Shanghai) Co. Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/misc/esp32s3_ds.h"
+
+static void esp32s3_ds_class_init(ObjectClass *klass, void *data)
+{
+    ESPDsClass* class = ESP_DS_CLASS(klass);
+    class->mem_blk_size = ESP32S3_DS_MEM_BLK_SIZE;
+    class->date = ESP32S3_DS_DATE_REG_VALUE;
+}
+
+static const TypeInfo esp32s3_ds_info = {
+    .name = TYPE_ESP32S3_DS,
+    .parent = TYPE_ESP_DS,
+    .instance_size = sizeof(ESP32S3DsState),
+    .class_init = esp32s3_ds_class_init,
+    .class_size = sizeof(ESP32S3DsClass)
+};
+
+static void esp32s3_ds_register_types(void)
+{
+    type_register_static(&esp32s3_ds_info);
+}
+
+type_init(esp32s3_ds_register_types)

hw/misc/meson.build

@@ -189,6 +189,8 @@ if gcrypt.found()
     'esp32s3_aes.c',
     'esp_rsa.c',
     'esp32s3_rsa.c',
+    'esp_ds.c',
+    'esp32s3_ds.c',
   ))
 endif
 

include/hw/misc/esp32s3_ds.h

@@ -0,0 +1,39 @@
+/*
+ * ESP32-C3 Digital Signature accelerator
+ *
+ * Copyright (c) 2023 Espressif Systems (Shanghai) Co. Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+#pragma once
+
+#include "hw/misc/esp_ds.h"
+
+#define TYPE_ESP32S3_DS "misc.esp32s3.ds"
+#define ESP32S3_DS(obj) OBJECT_CHECK(ESP32S3DsState, (obj), TYPE_ESP32S3_DS)
+
+#define ESP32S3_DS_MEM_BLK_SIZE 512
+#define ESP32S3_DS_DATE_REG_VALUE 0x20191217
+
+#define ESP32S3_DS_CIPHERTEXT_SIZE (ESP32S3_DS_MEM_BLK_SIZE + \
+                                    ESP32S3_DS_MEM_BLK_SIZE + \
+                                    ESP32S3_DS_MEM_BLK_SIZE + \
+                                    ESP_DS_BOX_MEM_BLK_SIZE)
+
+#define ESP32S3_DS_CALC_MD_SIZE (ESP32S3_DS_MEM_BLK_SIZE + \
+                                ESP32S3_DS_MEM_BLK_SIZE + \
+                                ESP32S3_DS_MEM_BLK_SIZE + \
+                                ESP_DS_MPRIME_SIZE + \
+                                ESP_DS_L_SIZE + \
+                                ESP_DS_IV_SIZE)
+
+typedef struct ESP32S3DsState {
+    ESPDsState parent;
+} ESP32S3DsState;
+
+typedef struct ESP32S3DsClass {
+    ESPDsClass parent_class;
+} ESP32S3DsClass;