diff --git a/lib/plat/esp32/esp_attr.h b/lib/plat/esp32/esp_attr.h
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+++ b/lib/plat/esp32/esp_attr.h
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+// Copyright 2015-2016 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.
+#ifndef __ESP_ATTR_H__
+#define __ESP_ATTR_H__
+
+#define ROMFN_ATTR
+
+//Normally, the linker script will put all code and rodata in flash,
+//and all variables in shared RAM. These macros can be used to redirect
+//particular functions/variables to other memory regions.
+
+// Forces code into IRAM instead of flash.
+#define IRAM_ATTR __attribute__((section(".iram1")))
+
+// Forces data into DRAM instead of flash
+#define DRAM_ATTR __attribute__((section(".dram1")))
+
+// Forces data to be 4 bytes aligned
+#define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
+
+// Forces data to be placed to DMA-capable places
+#define DMA_ATTR WORD_ALIGNED_ATTR DRAM_ATTR
+
+// Forces a string into DRAM instead of flash
+// Use as ets_printf(DRAM_STR("Hello world!\n"));
+#define DRAM_STR(str) (__extension__({static const DRAM_ATTR char __c[] = (str); (const char *)&__c;}))
+
+// Forces code into RTC fast memory. See "docs/deep-sleep-stub.rst"
+#define RTC_IRAM_ATTR __attribute__((section(".rtc.text")))
+
+// Forces data into RTC slow memory. See "docs/deep-sleep-stub.rst"
+// Any variable marked with this attribute will keep its value
+// during a deep sleep / wake cycle.
+#define RTC_DATA_ATTR __attribute__((section(".rtc.data")))
+
+// Forces read-only data into RTC slow memory. See "docs/deep-sleep-stub.rst"
+#define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
+
+// Forces data into noinit section to avoid initialization after restart.
+#define __NOINIT_ATTR __attribute__((section(".noinit")))
+
+// Forces data into RTC slow memory of .noinit section.
+// Any variable marked with this attribute will keep its value
+// after restart or during a deep sleep / wake cycle.
+#define RTC_NOINIT_ATTR  __attribute__((section(".rtc_noinit")))
+
+#endif /* __ESP_ATTR_H__ */