asm("push r9" "\n\t" "push r8" "\n\t" "push r7" "\n\t" "push r6" "\n\t" "push r5"); \
asm("push r4" "\n\t" "push r3" "\n\t" "push r2" "\n\t" "push r1" "\n\t" "push r0"); \
asm("in r0, __SREG__" "\n\t" "push r0"); \
- sei(); \
} while (0)
#define ao_arch_save_stack() do { \
#define ao_arch_isr_stack() /* nothing */
-#define ao_arch_cpu_idle() do { \
- if (!ao_cpu_sleep_disable) \
+/* Idle the CPU (if possible) waiting for an interrupt. Enabling
+ * interrupts and sleeping the CPU must be adjacent to eliminate race
+ * conditions. In all cases, we execute a single nop with interrupts
+ * enabled
+ */
+#define ao_arch_wait_interrupt() do { \
+ if (!ao_cpu_sleep_disable) { \
+ sleep_enable(); \
+ sei(); \
sleep_cpu(); \
+ sleep_disable(); \
+ } else { \
+ sei(); \
+ } \
+ ao_arch_nop(); \
+ cli(); \
} while (0)
#define ao_arch_restore_stack() do { \
uint8_t sp_l, sp_h; \
sp_l = (uint16_t) ao_cur_task->sp; \
sp_h = ((uint16_t) ao_cur_task->sp) >> 8; \
- cli(); \
asm("out __SP_H__,%0" : : "r" (sp_h) ); \
asm("out __SP_L__,%0" : : "r" (sp_l) ); \
asm("pop r0" "\n\t" \
#define ao_arch_critical(b) do { cli(); do { b } while (0); sei(); } while (0)
+#define ao_arch_block_interrupts() cli()
+#define ao_arch_release_interrupts() sei()
+
#define AO_TELESCIENCE_NUM_ADC 12
#endif /* _AO_ARCH_H_ */