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Commit Graph

34 Commits

Author SHA1 Message Date
Marian Buschsieweke
fa12d9ad52
cpu/atmega_common: Don't access sched_active_*
Replaced accesses to sched_active_* with API calls in C files
2020-08-17 11:26:19 +02:00
Marian Buschsieweke
1879f58512
cpu/atmega_common: Cleanup state flags
- Use one byte of RAM to track both IRQ and UART TX state
- Fix incorrect use of volatile
2020-02-06 15:41:41 +01:00
Marian Buschsieweke
97f727349b
cpu/atmega_common: Fixed atmega_exit_isr
A context switch at the end of the ISR should only occur, if requested.
This fixes this.
2019-11-27 01:39:33 +01:00
41e29e3fda
Merge pull request #12790 from maribu/atmega_isr_thread
cpu/atmega_common
2019-11-24 11:10:10 +01:00
cc51f4ff7c cpu/atmega_common: fix typos 2019-11-23 22:39:35 +01:00
Francois Berder
4a31f94cfc many typo fixes
Signed-off-by: Francois Berder <18538310+francois-berder@users.noreply.github.com>
2019-11-23 22:39:07 +01:00
Marian Buschsieweke
606d72f64b
cpu/atmega_common: Clean up & fix IRQ handling
At the end of an ISR, the ATmega code was doing an `thread_yield()` instead of
 a `thread_yield_higher()`. This resulted in tests/isr_yield_higher failing.
 Fixing this saves a few lines of code, some ROM, and solves the issue.
2019-11-23 11:57:11 +01:00
Marian Buschsieweke
2b1bee750a
cpu/atmega_common: Stop using reserved names
Names with two leading underscores are reserved in any context of the c
 standard, and thus must not be used. This ATmega platform used it however for
 defining internal stuff. This commit fixes this.
2019-11-23 11:56:11 +01:00
Thomas Perrot
44803ea4fd
cpu/atmega32u4: add support for ATmega32U4 2019-05-24 15:12:47 +02:00
Marian Buschsieweke
20b9ef7c5b
cpu/atmega_common: Fix function attributes
Functions marked with __atribute__((naked)) may only use basic inline assembly
and must not use any c code. The functions __enter_thread_mode() and
cpu_switch_context_exit() are using C code, so they must not be marked as
naked.
2019-04-26 11:02:01 +02:00
Gunar Schorcht
ecb26526df cpu/atmega_common: make RAM available as heap
Fills __malloc_heap_end with the current SP before it enters thread mode to make the remaining RAM available as a heap.
2019-02-05 02:19:58 +01:00
Josarn
91359631d5 cpu/atmega_common/thread_arch.c: uncrustified 2018-06-14 21:47:33 +02:00
Josarn
9b631170cb cpu/atmega_common: uncrustified 2018-06-14 21:47:33 +02:00
Josarn
80b02e5268 cpu/atmega_common: exit_isr thread_yield 2018-06-14 21:47:33 +02:00
Matthew Blue
ac2b643308 cpu/atmega_common: return to non-interrupt context swaps 2018-04-27 14:13:34 -04:00
Josarn
2ef1001ec7 cpu/atmega_common: use __temp_reg__ 2018-03-30 10:22:32 +02:00
7847a91e12 cpu: instead of cpp-style, use C-style comments 2018-02-06 16:59:58 +01:00
32c10ae2c9 core, cpu: rename thread_start_threading() -> cpu_switch_context_exit() 2017-11-16 14:40:16 +01:00
86665b71bf cpu: adapt to COREIF_NG removal 2017-11-16 14:40:16 +01:00
Victor Arino
3ba2177b0d cpu/atmega_common: fix typo 2017-08-30 20:08:37 +02:00
Hauke Petersen
9aad0e528f cpu: cleanup unused/umimplemented isr stack code
- removed ISR_STACKSIZE define where unused (set to 0)
- removed thread_arch_isr_stack_usage(), thread_arch_isr_stack_start(),
  and/or thread_arch_isr_stack_pointer() where not implemented
2017-05-12 18:07:08 +02:00
Jon Thacker
e0365e0bf9 atmega: use software interrupt for context swap
Fixes #5745
For AVR based boards, three defines must be defined AVR_CONTEXT_SWAP_INIT,
AVR_CONTEXT_SWAP_INTERRUPT_VECT, and AVR_CONTEXT_SWAP_TRIGGER.
These defines are used to trigger a software interrupt used for context
switching.

When AVR_CONTEXT_SWAP_INTERRUPT_VECT is handled, the scheduler is run
and a context swap will happen if necessary, with the resulting thread
starting following the reti instruction. This results in threads running
at normal priority instead of at interrupt priority.

Atmega devices do provide a pure software interrupt. The method used
here for waspmote-pro and arduino-mega2560 is to use pin change
interrupts, set the pin to act as an output, and toggle the value to
simulate a software interrupt. The main limitation here is that a
physical pin is now occupied and must be defined for each board
supported by RIOT. On the plus side, it provides an easy method for
detecting context swaps with an oscilloscope.
2016-09-07 14:35:53 -05:00
kYc0o
03d380845e Merge pull request #5593 from jthacker/atmega_regs_common
cpu/atmega_common: generalize register/peripheral definitions
2016-07-13 20:17:36 +02:00
Joakim Nohlgård
b02e0eca47 ps: Add current stack pointer and start of stack to isr_stack ps output (DEVELHELP) 2016-07-12 10:17:49 +02:00
Jon Thacker
2aec999900 cpu/atmega_common: generalize register/peripheral definitions
Makes AVR register definitions dependent on what avr-libc defines
for a given MCU, rather then duplicating that effort here.
Definitions done in this way are based on functionality provided,
rather than a specific MCU device.
2016-07-08 10:52:22 -05:00
MohmadAyman
53df3e8b57 core: cpu: provide function to acquire ISR stack usage 2016-06-01 23:01:35 +02:00
c3f7186d4e unify usage of inline assembly 2016-03-31 22:23:35 +02:00
DipSwitch
0bb4748a94 core: Fix/refactor function naming in core/incude/irq.h 2016-03-20 16:47:34 +01:00
2b010b5337 core: rename tcb_t -> thread_t, move into thread.h 2016-03-05 18:20:17 +01:00
9082273746 core: header cleanup 2016-02-28 22:46:28 +01:00
Joakim Gebart
13832d8e62 everything: Remove filename from @file Doxygen command 2015-05-22 07:34:41 +02:00
Oleg Hahm
db8f3d2650 cpu: use typed function pointer for thread_arch_init 2014-10-23 18:26:21 +02:00
Hinnerk van Bruinehsen
9933dd0b78 cpu: arm/cortex-mX/atmega: use uintptr_t for sp cast 2014-09-14 02:34:04 +02:00
Hinnerk van Bruinehsen
a6b77b4745 cpu: atmega_common: Initial import 2014-08-27 16:22:48 +02:00