RIOT/cpu/msp430-common/include/cpu.h

/******************************************************************************
Copyright (C) 2013, Freie Universitaet Berlin (FUB). All rights reserved.

These sources were developed at the Freie Universitaet Berlin, Computer Systems
and Telematics group (http://cst.mi.fu-berlin.de).
-------------------------------------------------------------------------------
This file is part of RIOT.

This file subject to the terms and conditions of the GNU Lesser General Public
License. See the file LICENSE in the top level directory for more details.
*******************************************************************************/

#ifndef _CPU_H
#define _CPU_H

/**
 * @defgroup	msp430		TI MSP430
 * @ingroup		cpu

<h2>First steps</h2>
\li	See the <a href="../manual/index.html">manual</a> for toolchain and ide setup

 * @{
 */

#include <sched.h>
#include <stdio.h>
#include <legacymsp430.h>
#include <cpu-conf.h>

#define WORDSIZE 16

/* not used(?) */
#define F_CPU 10000000

extern volatile int __inISR;
extern char __isr_stack[MSP430_ISR_STACK_SIZE];

//#define eINT()  eint()
//#define dINT()  dint()

inline void __save_context_isr(void) {
    __asm__("push r15");
    __asm__("push r14");
    __asm__("push r13");
    __asm__("push r12");
    __asm__("push r11");
    __asm__("push r10");
    __asm__("push r9");
    __asm__("push r8");
    __asm__("push r7");
    __asm__("push r6");
    __asm__("push r5");
    __asm__("push r4");

    __asm__("mov.w r1,%0" : "=r" (active_thread->sp));
}

inline void __restore_context_isr(void) {
    __asm__("mov.w %0,r1" : : "m" (active_thread->sp));

    __asm__("pop r4");
    __asm__("pop r5");
    __asm__("pop r6");
    __asm__("pop r7");
    __asm__("pop r8");
    __asm__("pop r9");
    __asm__("pop r10");
    __asm__("pop r11");
    __asm__("pop r12");
    __asm__("pop r13");
    __asm__("pop r14");
    __asm__("pop r15");
}

inline void __enter_isr(void) {
    __save_context_isr();
    __asm__("mov.w %0,r1" : : "i" (__isr_stack+MSP430_ISR_STACK_SIZE));
    __inISR = 1;
}

inline void __exit_isr(void) {
    __inISR = 0;
    if (sched_context_switch_request) sched_run();
    __restore_context_isr();
    __asm__("reti");
}

inline void __save_context(void) {
    __asm__("push r2"); /* save SR */
    __save_context_isr();
}

inline void __restore_context(void) {
    __restore_context_isr();
    __asm__("reti");
}

inline void eINT(void) {
//    puts("+");
    eint();
}

inline void dINT(void) {
//    puts("-");
    dint();
}

#define lpm_set(...)

void thread_yield(void);


int inISR(void);

/** @} */
#endif // _CPU_H