feat(esp8266): Add new esp attr defines

Remove ICACHE_FLASH_ATTR

components/esp8266/include/c_types.h

@@ -86,20 +86,6 @@ typedef enum {
 #define REG_SET_BIT(_r, _b)     (*(volatile uint32 *)(_r) |= (_b))
 #define REG_CLR_BIT(_r, _b)     (*(volatile uint32 *)(_r) &= ~(_b))
 
-#define STORE_ATTR          __attribute__((aligned(4)))
-
-#define SHMEM_ATTR
-
-#ifdef ICACHE_FLASH
-#define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
-#else
-#define ICACHE_FLASH_ATTR
-#endif
-
-#define DMEM_ATTR           __attribute__((section(".bss")))
-#define IRAM_ATTR           __attribute__((section(".text")))
-#define ICACHE_RODATA_ATTR  __attribute__((section(".irom.text")))
-
 #ifndef __cplusplus
 #define BOOL            bool
 #define TRUE            true

components/esp8266/include/esp_attr.h

@@ -0,0 +1,41 @@
+// 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__
+
+//Normally, the linker script will put all code and rodata in flash.
+//These macros can be used to redirect particular functions/variables
+//to other memory regions.
+
+// Make compatible to old SDK
+#define ICACHE_FLASH_ATTR
+
+// Make compatible to old SDK
+#define ICACHE_RODATA_ATTR
+
+// Forces code into IRAM instead of flash.
+#define IRAM_ATTR __attribute__((section(".text")))
+
+// Forces data into DRAM instead of flash
+#define DRAM_ATTR __attribute__((section(".data")))
+
+// Forces data to be 4 bytes aligned
+#define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
+
+// 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;}))
+
+#endif /* __ESP_ATTR_H__ */