Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_NXP/TARGET_LPC82X/TOOLCHAIN_ARM_MICRO/sys.cpp@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library - stackheap
bogdanm 0:9b334a45a8ff 2 * Copyright (C) 2009-2011 ARM Limited. All rights reserved.
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Setup a fixed single stack/heap memory model,
bogdanm 0:9b334a45a8ff 5 * between the top of the RW/ZI region and the stackpointer
bogdanm 0:9b334a45a8ff 6 */
bogdanm 0:9b334a45a8ff 7
bogdanm 0:9b334a45a8ff 8 #ifdef __cplusplus
bogdanm 0:9b334a45a8ff 9 extern "C" {
bogdanm 0:9b334a45a8ff 10 #endif
bogdanm 0:9b334a45a8ff 11
bogdanm 0:9b334a45a8ff 12 #include <rt_misc.h>
bogdanm 0:9b334a45a8ff 13 #include <stdint.h>
bogdanm 0:9b334a45a8ff 14
bogdanm 0:9b334a45a8ff 15 extern char Image$$RW_IRAM1$$ZI$$Limit[];
bogdanm 0:9b334a45a8ff 16
bogdanm 0:9b334a45a8ff 17 extern __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3) {
bogdanm 0:9b334a45a8ff 18 uint32_t zi_limit = (uint32_t)Image$$RW_IRAM1$$ZI$$Limit;
bogdanm 0:9b334a45a8ff 19 uint32_t sp_limit = __current_sp();
bogdanm 0:9b334a45a8ff 20
bogdanm 0:9b334a45a8ff 21 zi_limit = (zi_limit + 7) & ~0x7; // ensure zi_limit is 8-byte aligned
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 struct __initial_stackheap r;
bogdanm 0:9b334a45a8ff 24 r.heap_base = zi_limit;
bogdanm 0:9b334a45a8ff 25 r.heap_limit = sp_limit;
bogdanm 0:9b334a45a8ff 26 return r;
bogdanm 0:9b334a45a8ff 27 }
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 #ifdef __cplusplus
bogdanm 0:9b334a45a8ff 30 }
bogdanm 0:9b334a45a8ff 31 #endif