wl, spi_flash: Make wl API runnable on host

Makes the entirety of the wl API runnable on host. Flash emulator
is separated into spi_flash component directory to be reused by
other storage components.

components/spi_flash/sim/Flash_Emulator.cpp

@@ -0,0 +1,129 @@
+// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "Flash_Emulator.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+Flash_Emulator::Flash_Emulator(size_t size, size_t sector_sise, size_t min_size)
+{
+    this->reset_count = 0x7fffffff;
+    this->size = size;
+    this->sector_sise = sector_sise;
+    this->min_size = min_size;
+    this->buff = (uint8_t *)malloc(this->size);
+    this->access_count = new uint32_t[this->size / this->sector_sise];
+    memset(this->access_count, 0, this->size / this->sector_sise * sizeof(uint32_t));
+}
+
+size_t Flash_Emulator::chip_size()
+{
+    return this->size;
+}
+size_t Flash_Emulator::sector_size()
+{
+    return this->sector_sise;
+}
+
+esp_err_t Flash_Emulator::erase_sector(size_t sector)
+{
+    esp_err_t result = ESP_OK;
+    if ((this->reset_count != 0x7fffffff) && (this->reset_count != 0)) {
+        this->reset_count--;
+    }
+    if (this->reset_count <= 0) {
+        result = ESP_FAIL;
+        return result;
+    }
+    memset(&this->buff[sector * this->sector_sise], -1, this->sector_sise);
+    this->access_count[sector]++;
+    return result;
+}
+
+uint32_t Flash_Emulator::get_access_minmax()
+{
+    uint32_t min = INT32_MAX;
+    uint32_t max = 0;
+    for (size_t i = 0; i < (this->size / this->sector_sise) - 2; i++) {
+        if (this->access_count[i] < min) {
+            min = this->access_count[i];
+        }
+        if (this->access_count[i] > max) {
+            max = this->access_count[i];
+        }
+    }
+    return max - min;
+}
+
+esp_err_t Flash_Emulator::erase_range(size_t start_address, size_t size)
+{
+    esp_err_t result = ESP_OK;
+    uint32_t start_sector = start_address / this->sector_sise;
+    uint32_t count = (size + this->sector_sise - 1) / this->sector_sise;
+    for (size_t i = 0; i < count; i++) {
+        result |= this->erase_sector(start_sector + i);
+    }
+    return result;
+}
+
+esp_err_t Flash_Emulator::write(size_t dest_addr, const void *src, size_t size)
+{
+    esp_err_t result = ESP_OK;
+    if ((size % this->min_size) != 0) {
+        result = ESP_ERR_INVALID_SIZE;
+        return result;        
+    }
+    if ((dest_addr % this->min_size) != 0) {
+        result = ESP_ERR_INVALID_SIZE;
+        return result;        
+    }
+    if ((this->reset_count != 0x7fffffff) && (this->reset_count != 0)) {
+        this->reset_count--;
+    }
+    if (this->reset_count <= 0) {
+        result = ESP_FAIL;
+        return result;
+    }
+    memcpy(&this->buff[dest_addr], src, size);
+    return result;
+}
+
+esp_err_t Flash_Emulator::read(size_t src_addr, void *dest, size_t size)
+{
+    esp_err_t result = ESP_OK;
+    if (this->reset_count <= 0) {
+        result = ESP_FAIL;
+        return result;
+    }
+    memcpy(dest, &this->buff[src_addr], size);
+    return result;
+}
+
+Flash_Emulator::~Flash_Emulator()
+{
+    free(this->buff);
+    delete this->access_count;
+}
+
+void Flash_Emulator::SetResetCount(uint32_t count)
+{
+    this->reset_count = count;
+}
+
+void Flash_Emulator::SetResetSector(size_t sector)
+{
+    this->reset_sector = sector;
+}