Change the link script to optimum the RAM layout

Author: sgbihu

system/libarc32_arduino101/framework/src/os/balloc.c

@@ -47,12 +47,12 @@ typedef struct {
 /** Allocate the memory blocks and tracking variables for each pool */
 #ifdef CONFIG_MEMORY_POOLS_BALLOC_TRACK_OWNER
 #define DECLARE_MEMORY_POOL(index, size, count) \
-    uint8_t mblock_ ## index[count][size] __aligned(4); \
+    uint8_t mblock_ ## index[count][size] __aligned(4)  __attribute__ ((section(".kernelmempool"))); \
     uint32_t mblock_alloc_track_ ## index[count / BITS_PER_U32 + 1] = { 0 }; \
     uint32_t *mblock_owners_ ## index[count] = { 0 };
 #else
 #define DECLARE_MEMORY_POOL(index, size, count) \
-    uint8_t mblock_ ## index[count][size] __aligned(4); \
+    uint8_t mblock_ ## index[count][size] __aligned(4) __attribute__ ((section(".kernelmempool"))); \
     uint32_t mblock_alloc_track_ ## index[count / BITS_PER_U32 + \
                           1] = { 0 };
 #endif
@@ -100,7 +100,7 @@ T_POOL_DESC mpool[] =
 
 /** Allocate the memory blocks and tracking variables for each pool */
 #define DECLARE_MEMORY_POOL(index, size, count) \
-    uint8_t mblock_ ## index[count][size]; \
+    uint8_t mblock_ ## index[count][size] __attribute__ ((section(".kernelmempool"))); \
     uint32_t mblock_alloc_track_ ## index[count / BITS_PER_U32 + 1] = { 0 };
 
 #include "memory_pool_list.def"

variants/arduino_101/libarc32drv_arduino101.a

@@ -40,8 +40,8 @@ OUTPUT_FORMAT("elf32-littlearc", "elf32-bigarc", "elf32-littlearc")
 MEMORY
     {
     FLASH                 (rx) : ORIGIN = 0x40034000, LENGTH = 152K
-    SRAM                  (wx) : ORIGIN = 0xa800e000, LENGTH = 24K
-    DCCM                  (wx) : ORIGIN = 0x80000000, LENGTH = 8K
+    SRAM                  (rwx) : ORIGIN = 0xa800e000, LENGTH = 24K
+    DCCM                  (rw) : ORIGIN = 0x80000000, LENGTH = 8K
     }
 
 /* Define default stack size and FIRQ stack size.
@@ -180,6 +180,14 @@ SECTIONS
 
 	/* Data Closely Coupled Memory (DCCM) */
 /* DCCM Start */
+    .kernelmempool (NOLOAD) :
+    {
+	. = ALIGN(4);
+	__dccm_start = .;
+	*(.kernelmempool)
+	*(".kernelmempool.*")
+	__dccm_end = ALIGN(4);
+    } > DCCM
 /* DCCM End */
 
     }