heap-management: Use C memory management APIs

We shouldn't be allocating heap using C and FreeRTOS heap management APIs as we might end up with both FreeRTOS heap and C heap. This can lead to several unexpected issues. C standard heap functions are used to unify heap allocations as we can't use FreeRTOS heap management APIs because this would require patching lots of file as part of ml-embedded-evaluation-kit library which use C standard heap functions for heap allocations. Heap space is increased by `0x10000` as C standard heap management APIs requires more heap space for the existing FRI applications because it is less optimised than FreeRTOS heap management APIS (heap_4). Signed-off-by: Ahmed Ismail <[email protected]>
FreeRTOS · Mar 6, 2024 · 9e76bd3 · 9e76bd3
1 parent 7ff0f59
commit 9e76bd3
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Showing 10 changed files with 46 additions and 8 deletions.
diff --git a/applications/blinky/configs/freertos_config/FreeRTOSConfig.h b/applications/blinky/configs/freertos_config/FreeRTOSConfig.h
@@ -48,7 +48,7 @@ extern uint32_t SystemCoreClock;
 /* Memory allocation related definitions. */
 #define configSUPPORT_STATIC_ALLOCATION     1
 #define configSUPPORT_DYNAMIC_ALLOCATION    1
-#define configTOTAL_HEAP_SIZE               720896
+#define configTOTAL_HEAP_SIZE               0
 #define configAPPLICATION_ALLOCATED_HEAP    0
 
 #define configENABLE_MVE                    0

diff --git a/applications/keyword_detection/configs/freertos_config/FreeRTOSConfig.h b/applications/keyword_detection/configs/freertos_config/FreeRTOSConfig.h
@@ -48,7 +48,7 @@ extern uint32_t SystemCoreClock;
 /* Memory allocation related definitions. */
 #define configSUPPORT_STATIC_ALLOCATION     1
 #define configSUPPORT_DYNAMIC_ALLOCATION    1
-#define configTOTAL_HEAP_SIZE               720896
+#define configTOTAL_HEAP_SIZE               0
 #define configAPPLICATION_ALLOCATED_HEAP    0
 
 #define configENABLE_MVE                    0

diff --git a/applications/speech_recognition/configs/freertos_config/FreeRTOSConfig.h b/applications/speech_recognition/configs/freertos_config/FreeRTOSConfig.h
@@ -48,7 +48,7 @@ extern uint32_t SystemCoreClock;
 /* Memory allocation related definitions. */
 #define configSUPPORT_STATIC_ALLOCATION     1
 #define configSUPPORT_DYNAMIC_ALLOCATION    1
-#define configTOTAL_HEAP_SIZE               720896
+#define configTOTAL_HEAP_SIZE               0
 #define configAPPLICATION_ALLOCATED_HEAP    0
 
 #define configENABLE_MVE                    0

diff --git a/bsp/corstone300/an552_ns.ld b/bsp/corstone300/an552_ns.ld
@@ -44,7 +44,7 @@ __RAM_SIZE = (0x00200000 - PROVISIONING_SIZE);
   </h>
   -----------------------------------------------------------------------------*/
 __STACK_SIZE = 0x00001000;
-__HEAP_SIZE  = 0x000B0000;
+__HEAP_SIZE  = 0x000C0000;
 
 /*
  *-------------------- <<< end of configuration section >>> -------------------

diff --git a/bsp/corstone300/an552_ns.sct b/bsp/corstone300/an552_ns.sct
@@ -17,7 +17,7 @@ LR_CODE (0x28000000 + ((((0) + (0x40000)) + (0x400)))) {
 
     ARM_LIB_STACK +0 ALIGN 32 EMPTY (0x0001000) {
     }
-    ARM_LIB_HEAP +0 ALIGN 8 EMPTY (0x00b0000) {
+    ARM_LIB_HEAP +0 ALIGN 8 EMPTY (0x00C0000) {
     }
 
     ;-----------------------------------------------------

diff --git a/bsp/corstone310/an555_ns.ld b/bsp/corstone310/an555_ns.ld
@@ -60,7 +60,7 @@ __RAM_SIZE = (ISRAM1_SIZE - PROVISIONING_SIZE);
   </h>
   -----------------------------------------------------------------------------*/
 __STACK_SIZE = 0x00001000;
-__HEAP_SIZE  = 0x000B0000;
+__HEAP_SIZE  = 0x000C0000;
 
 /*
  *-------------------- <<< end of configuration section >>> -------------------

diff --git a/bsp/corstone310/an555_ns.sct b/bsp/corstone310/an555_ns.sct
@@ -25,7 +25,7 @@
 #define ISRAM1_SIZE             0x00200000
 #define PROVISIONING_SIZE       0x1000
 #define STACK_SIZE              0x00001000
-#define HEAP_SIZE               0x000B0000
+#define HEAP_SIZE               0x000C0000
 
 LR_CODE (ROM_START + ((((0) + (FLASH_S_PARTITION_SIZE)) + BL2_HEADER_SIZE))) {
     ER_CODE (ROM_START + ((((0) + (FLASH_S_PARTITION_SIZE)) + BL2_HEADER_SIZE))) (((FLASH_NS_PARTITION_SIZE) - BL2_HEADER_SIZE - BL2_TRAILER_SIZE)) {

diff --git a/components/freertos_kernel/CMakeLists.txt b/components/freertos_kernel/CMakeLists.txt
@@ -8,7 +8,7 @@ set(freertos_kernel_SOURCE_DIR
     "Path to FreeRTOS-Kernel source code"
 )
 
-set(FREERTOS_HEAP "4" CACHE STRING "" FORCE)
+set(FREERTOS_HEAP "${CMAKE_CURRENT_LIST_DIR}/integration/src/heap_management.c" CACHE STRING "" FORCE)
 
 if(ARM_CORSTONE_BSP_TARGET_PLATFORM STREQUAL "corstone300")
     set(FREERTOS_PORT GCC_ARM_CM55_TFM)

diff --git a/components/freertos_kernel/integration/src/heap_management.c b/components/freertos_kernel/integration/src/heap_management.c
@@ -0,0 +1,37 @@
+/* Copyright 2024 Arm Limited and/or its affiliates
+ * <[email protected]>
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <stdlib.h>
+
+void * pvPortMalloc( size_t xWantedSize )
+{
+    return malloc( xWantedSize );
+}
+
+void vPortFree( void * pv )
+{
+    free( pv );
+}
+
+void * pvPortCalloc( size_t xNum,
+                     size_t xSize )
+{
+    return calloc( xNum, xSize );
+}
+
+/* These are dummy implementations as C standard library does not provide
+ * functions to get the statistics of heap memory. These dummy implementation are needed
+ * as these APIs are used as part of FreeRTOS Plus TCP code which is unused in the FRI code (removed by the linker)
+ * but ARMClang linker requires all the compiled symbols to be defined.
+ */
+size_t xPortGetFreeHeapSize( void )
+{
+    return 0;
+}
+
+size_t xPortGetMinimumEverFreeHeapSize( void )
+{
+    return 0;
+}
diff --git a/release_changes/202402261352.change b/release_changes/202402261352.change
@@ -0,0 +1 @@
+heap-management: Use C memory management APIs.