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| author | Bdale Garbee <bdale@gag.com> | 2013-05-16 00:36:23 -0600 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2013-05-16 00:36:23 -0600 |
| commit | 02d111b1b53ef01fc6e9ab6c4bc60b8af1be0067 (patch) | |
| tree | 8356f4a019969ee99a45e264c87d38555cf316cc /src/avr/ao_arch.h | |
| parent | 7a2e1f05adad990a6b161865267abf07ffec7a7e (diff) | |
| parent | 7699a55aed3a9a7daeb4c6a5a9a280f43edf455f (diff) | |
Merge branch 'branch-1.2' into debian
Diffstat (limited to 'src/avr/ao_arch.h')
| -rw-r--r-- | src/avr/ao_arch.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/src/avr/ao_arch.h b/src/avr/ao_arch.h index a14d0ade..d626e830 100644 --- a/src/avr/ao_arch.h +++ b/src/avr/ao_arch.h @@ -37,7 +37,9 @@ * AVR definitions and code fragments for AltOS */ +#ifndef AO_STACK_SIZE #define AO_STACK_SIZE 116 +#endif /* Various definitions to make GCC look more like SDCC */ @@ -110,7 +112,6 @@ extern uint8_t ao_cpu_sleep_disable; 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 { \ @@ -122,16 +123,28 @@ extern uint8_t ao_cpu_sleep_disable; #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" \ @@ -148,6 +161,9 @@ extern uint8_t ao_cpu_sleep_disable; #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_ */ |