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[LPC4088] RAM size fix for ARM_GCC. Added possibility to reserve stack space #141

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Merged
merged 4 commits into from
Jan 9, 2014
Merged

[LPC4088] RAM size fix for ARM_GCC. Added possibility to reserve stack space #141

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a1a2fec
[LPC4088]: Corrected RAM size in linker script (ARM_GCC)
arebert Jan 9, 2014
3157d5a
[LPC4088] Making it possible to reserve stack space by weak function.
arebert Jan 9, 2014
1448b87
[LPC4088] Making it possible to reserve stack space by weak function.
arebert Jan 9, 2014
e8b09cb
[LPC4088] Corrected an invalid header file dependecy.
arebert Jan 9, 2014
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3 changes: 2 additions & 1 deletion libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys.cpp
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Expand Up @@ -11,6 +11,7 @@ extern "C" {

#include <rt_misc.h>
#include <stdint.h>
#include "sys_helper.h"

extern char Image$$RW_IRAM1$$ZI$$Limit[];

Expand All @@ -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;
}

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19 changes: 19 additions & 0 deletions libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys_helper.cpp
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@@ -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
}
16 changes: 16 additions & 0 deletions libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys_helper.h
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@@ -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
2 changes: 1 addition & 1 deletion libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_GCC_ARM/LPC4088.ld
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Expand Up @@ -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
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2 changes: 1 addition & 1 deletion workspace_tools/export/uvision4_lpc4088.uvopt.tmpl
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Expand Up @@ -21,7 +21,7 @@
</DaveTm>

<Target>
<TargetName>mbed NXP LPC1768</TargetName>
<TargetName>mbed NXP LPC4088</TargetName>
<ToolsetNumber>0x4</ToolsetNumber>
<ToolsetName>ARM-ADS</ToolsetName>
<TargetOption>
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