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esp32_allocateheap.c: Add a comment

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YAMAMOTO Takashi
2021-02-08 17:33:15 +09:00
committed by Abdelatif Guettouche
parent ccc75a09e9
commit 63c08a79be
1 changed files with 29 additions and 0 deletions
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arch/xtensa/src/esp32/esp32_allocateheap.c
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@@ -53,6 +53,35 @@
* Pre-processor Definitions
****************************************************************************/
/* The heap overview:
*
* CONFIG_HEAP2_BASE eg. 3f80 0000
* :
* : g_mmheap region3 (CONFIG_ESP32_SPIRAM)
* :
* CONFIG_HEAP2_BASE + CONFIG_HEAP2_SIZE eg. 3fc0 0000
*
* _sheap eg. 3ffc 8c6c
* :
* : g_iheap (CONFIG_XTENSA_USE_SEPARATE_IMEM)
* :
* _sheap + CONFIG_XTENSA_IMEM_REGION_SIZE eg. 3ffd ebfc
* :
* : g_mmheap region1
* :
* HEAP_REGION1_END 3ffd fff0
* :
* : ROM data
* :
* HEAP_REGION2_START 3ffe 1330 or 3ffe 7e40
* :
* : g_mmheap region2
* :
* : about 123KB
* :
* _eheap 4000 0000
*/
/* Region 1 of the heap is the area from the end of the .data section to the
* begining of the ROM data. The start address is defined from the linker
* script as "_sheap". Then end is defined here, as follows: