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https://github.com/RIOT-OS/RIOT.git
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55f433103b
Set __heap_end to current SP before entering thread mode to make the remaining RAM available as heap for module oneway_malloc.
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu
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* @{
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*
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* @file
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* @brief Calls startup functions on MSP430-based platforms
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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*
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* @}
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*/
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#include <stdio.h>
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#include "kernel_init.h"
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#include "irq.h"
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#include "log.h"
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extern void board_init(void);
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/**
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* Leave some extra space in the stack to allows us to finish the kernel
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* initialization procedure. __heap_end is set the current stack, minus
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* STACK_EXTRA since there is still code to execute.
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*/
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#define STACK_EXTRA 32
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__attribute__((constructor)) static void startup(void)
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{
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/* use putchar so the linker links it in: */
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putchar('\n');
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board_init();
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LOG_INFO("RIOT MSP430 hardware initialization complete.\n");
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/* save current stack pointer as top of heap before enter the thread mode */
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extern char *__heap_end;
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__asm__ __volatile__("mov r1, %0" : "=r"(__heap_end));
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__heap_end -= STACK_EXTRA;
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kernel_init();
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}
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