Merge pull request #141 from arebert/lpc4088

[LPC4088] RAM size fix for ARM_GCC. Added possibility to reserve stack space

Author: bogdanm

libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys.cpp

@@ -11,6 +11,7 @@ extern "C" {
 
 #include <rt_misc.h>
 #include <stdint.h>
+#include "sys_helper.h"
 
 extern char Image$$RW_IRAM1$$ZI$$Limit[];
 
@@ -22,7 +23,7 @@ extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_
 
     struct __initial_stackheap r;
     r.heap_base = zi_limit;
-    r.heap_limit = sp_limit;
+    r.heap_limit = sp_limit - __reserved_stack_size();
     return r;
 }
 

libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys_helper.cpp

@@ -0,0 +1,19 @@
+/* mbed Microcontroller Library - stackheap
+ * Copyright (C) 2009-2011 ARM Limited. All rights reserved.
+ *
+ */
+
+#include "sys_helper.h"
+
+/* This function specifies the amount of memory of the internal RAM to
+   reserve for the stack. The default implementation will reserve 0 bytes
+   which gives the normal behaviour where the stack and heap share all the
+   internal RAM.
+
+   You can override this function in your code to reserve a number of bytes
+   for the stack.
+*/
+extern "C" __attribute__((weak)) uint32_t __reserved_stack_size();
+extern "C" __attribute__((weak)) uint32_t __reserved_stack_size() {
+    return 0; // return 0 to indicate that nothing is reserved
+}

libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys_helper.h

@@ -0,0 +1,16 @@
+#ifndef SYS_HELPER_H
+#define SYS_HELPER_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint32_t __reserved_stack_size();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_GCC_ARM/LPC4088.ld

@@ -4,7 +4,7 @@
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 512K
-  RAM (rwx) : ORIGIN = 0x100000E8, LENGTH = (32K - 0xE8)
+  RAM (rwx) : ORIGIN = 0x100000E8, LENGTH = (64K - 0xE8)
 
   USB_RAM(rwx) : ORIGIN = 0x20000000, LENGTH = 16K
   ETH_RAM(rwx) : ORIGIN = 0x20004000, LENGTH = 16K

workspace_tools/export/uvision4_lpc4088.uvopt.tmpl

@@ -21,7 +21,7 @@
   </DaveTm>
 
   <Target>
-    <TargetName>mbed NXP LPC1768</TargetName>
+    <TargetName>mbed NXP LPC4088</TargetName>
     <ToolsetNumber>0x4</ToolsetNumber>
     <ToolsetName>ARM-ADS</ToolsetName>
     <TargetOption>