teralytic / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed by teralytic

targets/cmsis/TARGET_NXP/TARGET_LPC408X/TOOLCHAIN_ARM_STD/sys.cpp@148:4802eb17e82b, 2016-10-17 (annotated)

Committer:
rodriguise
Date:
Mon Oct 17 18:47:01 2016 +0000
Revision:
148:4802eb17e82b
Parent:
144:ef7eb2e8f9f7 
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<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library - stackheap
<> 144:ef7eb2e8f9f7 2 * Copyright (C) 2009-2011 ARM Limited. All rights reserved.
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Setup a fixed single stack/heap memory model,
<> 144:ef7eb2e8f9f7 5 * between the top of the RW/ZI region and the stackpointer
<> 144:ef7eb2e8f9f7 6 */
<> 144:ef7eb2e8f9f7 7
<> 144:ef7eb2e8f9f7 8 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 9 extern "C" {
<> 144:ef7eb2e8f9f7 10 #endif
<> 144:ef7eb2e8f9f7 11
<> 144:ef7eb2e8f9f7 12 #include <rt_misc.h>
<> 144:ef7eb2e8f9f7 13 #include <stdint.h>
<> 144:ef7eb2e8f9f7 14 #include "sys_helper.h"
<> 144:ef7eb2e8f9f7 15
<> 144:ef7eb2e8f9f7 16 extern char Image$$RW_IRAM1$$ZI$$Limit[];
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) {
<> 144:ef7eb2e8f9f7 19 uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit;
<> 144:ef7eb2e8f9f7 20 uint32_t sp_limit = __current_sp();
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 zi_limit = (zi_limit + 7) & ~0x7; // ensure zi_limit is 8-byte aligned
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 struct __initial_stackheap r;
<> 144:ef7eb2e8f9f7 25 r.heap_base = zi_limit;
<> 144:ef7eb2e8f9f7 26 r.heap_limit = sp_limit - __reserved_stack_size();
<> 144:ef7eb2e8f9f7 27 return r;
<> 144:ef7eb2e8f9f7 28 }
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 31 }
<> 144:ef7eb2e8f9f7 32 #endif