esp32_allocateheap.c: Adjust the region of the heap coming from the

external memory when a BSS section is allowed to reside there.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>

arch/xtensa/src/common/xtensa_attr.h

@@ -69,10 +69,12 @@
 
 #define RTC_RODATA_ATTR __attribute__((section(".rtc.rodata")))
 
-/* Forces bss variable into external memory. */
+/* Allow bss variables into external memory. */
 
 #ifdef CONFIG_XTENSA_EXTMEM_BSS
 #  define EXT_RAM_ATTR __attribute__((section(".extmem.bss")))
+#else
+#  define EXT_RAM_ATTR
 #endif
 
 #endif /* __ARCH_XTENSA_SRC_COMMON_XTENSA_ATTR_H */

arch/xtensa/src/esp32/esp32_allocateheap.c

@@ -148,11 +148,16 @@ void xtensa_add_region(void)
   umm_addregion(start, size);
 #endif
 
-#if defined(CONFIG_ESP32_SPIRAM)
+#ifdef CONFIG_ESP32_SPIRAM
-  /* Check for any additional memory regions */
-
 #  if defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_SIZE)
-    umm_addregion((FAR void *)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
+#    ifdef CONFIG_XTENSA_EXTMEM_BSS
+      start = (FAR void *)(&_ebss_extmem);
+      size = CONFIG_HEAP2_SIZE - (size_t)(&_ebss_extmem - &_sbss_extmem);
+#    else
+      start = (FAR void *)CONFIG_HEAP2_BASE;
+      size = CONFIG_HEAP2_SIZE;
+#    endif
+    umm_addregion(start, size);
 #  endif
 #endif
 }