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ARM: port memory_barrier.h. 

This is just a best guess, because none of the compiled code uses
it so far, but a pretty safe one.
This commit is contained in:
Markus Hitter 2015-08-01 15:28:57 +02:00
parent 137a638658
commit ec8f0133bf
1 changed files with 25 additions and 14 deletions
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37
memory_barrier.h
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@ -1,20 +1,11 @@
#ifndef _MEMORY_BARRIER_H_ #ifndef _MEMORY_BARRIER_H_
#define _MEMORY_BARRIER_H_ #define _MEMORY_BARRIER_H_
#ifdef SIMULATOR #include "cpu.h"
#define CLI_SEI_BUG_MEMORY_BARRIER()
#define MEMORY_BARRIER()
#define ATOMIC_START { \
uint8_t save_reg = sim_interrupts; \
cli();
#define ATOMIC_END MEMORY_BARRIER(); \ #if defined __AVR__
if (save_reg) sei(); \
}
#elif defined __AVR__
#include <util/atomic.h>
#include <avr/version.h> #include <avr/version.h>
// Provide a memory barrier to the compiler. This informs // Provide a memory barrier to the compiler. This informs
@ -50,5 +41,25 @@
SREG = save_reg; \ SREG = save_reg; \
} }
#endif #elif defined __ARMEL__
#endif
#define ATOMIC_START cli();
#define ATOMIC_END sei();
#define MEMORY_BARRIER()
#elif defined SIMULATOR
#define CLI_SEI_BUG_MEMORY_BARRIER()
#define MEMORY_BARRIER()
#define ATOMIC_START { \
uint8_t save_reg = sim_interrupts; \
cli();
#define ATOMIC_END MEMORY_BARRIER(); \
if (save_reg) sei(); \
}
#endif /* __AVR__, __ARMEL__, SIMULATOR */
#endif /* _MEMORY_BARRIER_H_ */