1e6c25992e
Using these attributes, .data and .bss can be placed in IRAM Signed-off-by: Sachin Parekh <sachin.parekh@espressif.com>
136 lines
5.4 KiB
C
136 lines
5.4 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef __ESP_ATTR_H__
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#define __ESP_ATTR_H__
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#include "sdkconfig.h"
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#define ROMFN_ATTR
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//Normally, the linker script will put all code and rodata in flash,
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//and all variables in shared RAM. These macros can be used to redirect
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//particular functions/variables to other memory regions.
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// Forces code into IRAM instead of flash
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#define IRAM_ATTR _SECTION_ATTR_IMPL(".iram1", __COUNTER__)
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// Forces data into DRAM instead of flash
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#define DRAM_ATTR _SECTION_ATTR_IMPL(".dram1", __COUNTER__)
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#ifdef CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY
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// Forces data into IRAM instead of DRAM
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#define IRAM_DATA_ATTR __attribute__((section(".iram.data")))
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// Forces bss into IRAM instead of DRAM
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#define IRAM_BSS_ATTR __attribute__((section(".iram.bss")))
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#else
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#define IRAM_DATA_ATTR
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#define IRAM_BSS_ATTR
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#endif
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// Forces data to be 4 bytes aligned
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#define WORD_ALIGNED_ATTR __attribute__((aligned(4)))
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// Forces data to be placed to DMA-capable places
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#define DMA_ATTR WORD_ALIGNED_ATTR DRAM_ATTR
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// Forces a function to be inlined
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#define FORCE_INLINE_ATTR static inline __attribute__((always_inline))
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// Forces a string into DRAM instead of flash
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// Use as ets_printf(DRAM_STR("Hello world!\n"));
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#define DRAM_STR(str) (__extension__({static const DRAM_ATTR char __c[] = (str); (const char *)&__c;}))
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// Forces code into RTC fast memory. See "docs/deep-sleep-stub.rst"
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#define RTC_IRAM_ATTR _SECTION_ATTR_IMPL(".rtc.text", __COUNTER__)
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#if CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY
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// Forces bss variable into external memory. "
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#define EXT_RAM_ATTR _SECTION_ATTR_IMPL(".ext_ram.bss", __COUNTER__)
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#else
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#define EXT_RAM_ATTR
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#endif
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// Forces data into RTC slow memory. See "docs/deep-sleep-stub.rst"
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// Any variable marked with this attribute will keep its value
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// during a deep sleep / wake cycle.
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#define RTC_DATA_ATTR _SECTION_ATTR_IMPL(".rtc.data", __COUNTER__)
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// Forces read-only data into RTC memory. See "docs/deep-sleep-stub.rst"
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#define RTC_RODATA_ATTR _SECTION_ATTR_IMPL(".rtc.rodata", __COUNTER__)
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// Allows to place data into RTC_SLOW memory.
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#define RTC_SLOW_ATTR _SECTION_ATTR_IMPL(".rtc.force_slow", __COUNTER__)
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// Allows to place data into RTC_FAST memory.
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#define RTC_FAST_ATTR _SECTION_ATTR_IMPL(".rtc.force_fast", __COUNTER__)
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// Forces data into noinit section to avoid initialization after restart.
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#define __NOINIT_ATTR _SECTION_ATTR_IMPL(".noinit", __COUNTER__)
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// Forces data into RTC slow memory of .noinit section.
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// Any variable marked with this attribute will keep its value
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// after restart or during a deep sleep / wake cycle.
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#define RTC_NOINIT_ATTR _SECTION_ATTR_IMPL(".rtc_noinit", __COUNTER__)
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// Forces to not inline function
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#define NOINLINE_ATTR __attribute__((noinline))
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// This allows using enum as flags in C++
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// Format: FLAG_ATTR(flag_enum_t)
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#ifdef __cplusplus
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// Inline is required here to avoid multiple definition error in linker
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#define FLAG_ATTR_IMPL(TYPE, INT_TYPE) \
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FORCE_INLINE_ATTR constexpr TYPE operator~ (TYPE a) { return (TYPE)~(INT_TYPE)a; } \
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FORCE_INLINE_ATTR constexpr TYPE operator| (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a | (INT_TYPE)b); } \
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FORCE_INLINE_ATTR constexpr TYPE operator& (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a & (INT_TYPE)b); } \
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FORCE_INLINE_ATTR constexpr TYPE operator^ (TYPE a, TYPE b) { return (TYPE)((INT_TYPE)a ^ (INT_TYPE)b); } \
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FORCE_INLINE_ATTR constexpr TYPE operator>> (TYPE a, int b) { return (TYPE)((INT_TYPE)a >> b); } \
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FORCE_INLINE_ATTR constexpr TYPE operator<< (TYPE a, int b) { return (TYPE)((INT_TYPE)a << b); } \
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FORCE_INLINE_ATTR TYPE& operator|=(TYPE& a, TYPE b) { a = a | b; return a; } \
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FORCE_INLINE_ATTR TYPE& operator&=(TYPE& a, TYPE b) { a = a & b; return a; } \
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FORCE_INLINE_ATTR TYPE& operator^=(TYPE& a, TYPE b) { a = a ^ b; return a; } \
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FORCE_INLINE_ATTR TYPE& operator>>=(TYPE& a, int b) { a >>= b; return a; } \
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FORCE_INLINE_ATTR TYPE& operator<<=(TYPE& a, int b) { a <<= b; return a; }
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#define FLAG_ATTR_U32(TYPE) FLAG_ATTR_IMPL(TYPE, uint32_t)
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#define FLAG_ATTR FLAG_ATTR_U32
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#else
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#define FLAG_ATTR(TYPE)
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#endif
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// Implementation for a unique custom section
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//
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// This prevents gcc producing "x causes a section type conflict with y"
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// errors if two variables in the same source file have different linkage (maybe const & non-const) but are placed in the same custom section
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//
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// Using unique sections also means --gc-sections can remove unused
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// data with a custom section type set
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#define _SECTION_ATTR_IMPL(SECTION, COUNTER) __attribute__((section(SECTION "." _COUNTER_STRINGIFY(COUNTER))))
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#define _COUNTER_STRINGIFY(COUNTER) #COUNTER
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/* Use IDF_DEPRECATED attribute to mark anything deprecated from use in
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ESP-IDF's own source code, but not deprecated for external users.
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*/
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#ifdef IDF_CI_BUILD
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#define IDF_DEPRECATED(REASON) __attribute__((deprecated(REASON)))
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#else
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#define IDF_DEPRECATED(REASON)
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#endif
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#endif /* __ESP_ATTR_H__ */
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