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nuttx/boards/arm
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Marco Casaroli a6ddfcd360 arch/arm/rp23xx: Add suspend to RAM in the POWMAN P1.0 state. 
P1.0 powers the switched core off and keeps the XIP cache and SRAM.
Every peripheral loses its registers, so the chip comes back through
the bootrom and the ordinary boot, not from the WFI.  The idle governor
never selects it: an application asks for it with the new
BOARDIOC_RP23XX_SUSPEND boardctl() command (arch/chip/pm.h, handled by
the common rp23xx board_ioctl()).

rp23xx_pm_suspend():

- saves the NVIC, writes a marker to POWMAN SCRATCH0, and arms the
  wake: the RP23XX_PM_WAKEUP_GPIO pin in a POWMAN power-up detector,
  and the always-on timer alarm for a timed wake.  An armed RTC alarm
  that comes first powers the chip up itself, so an application can
  set the wake with RTC_SET_ALARM.  Otherwise the RTC alarm is saved
  with the new rp23xx_rtc_savealarm() and given back after the wake
  with rp23xx_rtc_restorealarm().
- cleans the XIP cache, with the RP2350-E11 workaround, because the
  resume discards it and PSRAM can hold task stacks.
- requests P1.0 and waits in WFI.

On the next boot, __start asks rp23xx_pm_resume_pending() (the marker
and CHIP_RESET.HAD_SWCORE_PD) before .bss and .data are touched.  For a
resume it moves to its own stack, because the idle thread still runs on
the idle stack, sets up the hardware with the cold boot code (now
rp23xx_hwinit()), and longjmps back to the suspended thread.  The UARTs
are set up from the driver state in RAM, the PSRAM format is applied
again without detection (the part is still in quad mode), the dormant-
wake GPIOs are armed again (the IO bank lost them, and the next dormant
period could then never end), and the time of day is taken from the
always-on timer.

Assisted-by: Claude Code:claude-opus-5-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
2026-10-09 06:17:57 -03:00
..
a1x/pcduino-a10 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
am67/t3-gem-o1 drivers/vhost: Optimize vhost-net performance and robustness 2026-09-27 18:41:30 +08:00
am335x boards/arm: Add support for the original BeagleBone 2026-08-19 10:11:38 +08:00
at32/at32f437-mini net/netdev: Combine the per-command CAN ioctl options into NETDEV_CAN_IOCTL 2026-09-01 17:40:47 +08:00
c5471/c5471evm arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
common/stm32 arch/arm/stm32f7: use common Kconfig symbols 2026-08-18 09:34:58 +08:00
csk6 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
cxd56xx cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
dm320/ntosd-dm320 !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
efm32 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
eoss3/quickfeather arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
fvp-v8r-aarch32/fvp-armv8r-aarch32 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
gd32f4 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
ht32f491x3/esk32 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
imx6/sabre-6quad boards/qemu: enable line-buffered NTFC writes 2026-09-14 23:48:49 +08:00
imx9 net: move rx timestamp from d_rxtime to iob_s.io_time 2026-09-18 20:00:49 +08:00
imxrt arch/arm/imxrt: Add SDCARD support for imxrt1180-evk:nsh board 2026-10-09 12:29:40 +08:00
kinetis arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
kl arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
lc823450/lc823450-xgevk arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
lpc17xx_40xx !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
lpc31xx !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
lpc43xx arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
lpc54xx/lpcxpresso-lpc54628 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
lpc214x arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
lpc2378/olimex-lpc2378 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
max326xx/max32660-evsys arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
mcx-nxxx/frdm-mcxn236 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
moxart/moxa !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
mps boards/mps2-an500: Use the common ELF link flags. 2026-10-07 11:45:09 -03:00
mx8mp/verdin-mx8mp arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
n32h7/n32h762iil7 arch/arm/n32h7: Add N32H762IIL7 BSP 2026-09-17 09:39:41 -03:00
nrf52 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
nrf53 boards/thingy53: fix possible out of bound write for rgb 2026-09-25 10:46:24 +02:00
nrf54l boards/nrf54l15-tag: add board support 2026-10-09 11:48:02 +08:00
nrf91 boards/thingy91: add rgb led support 2026-09-24 09:59:04 +02:00
nuc1xx/nutiny-nuc120 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
phy62xx/phy6222 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
qemu boards/arm/qemu-armv7a: switch all nsh defconfigs to nxinit entrypoint 2026-09-02 09:14:00 +08:00
ra4 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
ra8m1/ek-ra8m1 boards/arm/ra8m1/ek-ra8m1: Add SCI0 pins and a serial-test config 2026-10-06 16:56:58 -03:00
rp23xx arch/arm/rp23xx: Add suspend to RAM in the POWMAN P1.0 state. 2026-10-09 06:17:57 -03:00
rp2040 boards/rp2040: switch waveshare nsh/usbnsh configs to nxinit entrypoint 2026-09-18 08:47:09 -03:00
rtl8720f/rtl8720f_evb arch/arm/rtl8720f: add timer driver support 2026-09-01 17:41:14 +08:00
rtl8721dx/pke8721daf arch/arm/rtl8721dx: add shared Ameba timer driver 2026-09-01 17:41:14 +08:00
rtl8721f/rtl8721f_evb arch/arm/rtl8721f: add timer driver support 2026-09-01 17:41:14 +08:00
rtl8730e/rtl8730e_evb arch/arm/rtl8730e: add I2C master driver support 2026-10-08 15:49:34 -03:00
s32k1xx boards/arm/s32k1xx: CMake added NXP RDDRONE-BMS772 board 2026-10-05 18:42:56 +08:00
s32k3xx !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
sam34 !arch/arm: Use r9 as the PIC base register. 2026-08-06 01:38:23 +08:00
sama5 arch, boards, cmake: Build C++ ELF modules without __cxa_atexit. 2026-09-04 15:44:24 -03:00
samd2l2 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
samd5e5 boards: fix mtd_partition() argument units in flash partition loops 2026-09-01 09:14:34 +08:00
samv7 boards/arm/samv7/same70-qmtech: disable FAT LFN in mcuboot-loader 2026-09-11 10:55:25 -03:00
stm32c0 boards/stm32c0/nucleo-c071rb: Add usb-cdc config 2026-09-14 18:32:23 -03:00
stm32c5 boards/arm/stm32c5: Add nucleo-C562re support 2026-08-27 01:07:10 +08:00
stm32f0 boards/nucleo-f072rb: Add USB device support and a CDC/ACM configuration. 2026-08-20 15:16:33 -03:00
stm32f1 boards: fix mtd_partition() argument units in flash partition loops 2026-09-01 09:14:34 +08:00
stm32f2 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
stm32f3 boards/arm/stm32f3/nucleo-f302r8: fix qenco configuration 2026-08-07 11:17:24 +08:00
stm32f4 boards: fix mtd_partition() argument units in flash partition loops 2026-09-01 09:14:34 +08:00
stm32f7 arch/arm/stm32f7: use common Kconfig symbols 2026-08-18 09:34:58 +08:00
stm32g0 boards/nucleo-g0b1re: Add USB device configurations 2026-08-25 01:03:58 +08:00
stm32g4 boards: stm32g4: regenerate nucleo-g431kb comp defconfig 2026-09-19 22:41:17 +08:00
stm32h5 arch/arm/stm32h5: map OTP, RO and EDATA flash non-cacheable. 2026-10-06 16:57:31 -03:00
stm32h7 boards/arm/stm32h7: add STM32H735G-DK support 2026-10-07 04:06:37 +02:00
stm32l0 boards/nucleo-l073rz: Add USB device support and a CDC/ACM configuration. 2026-08-22 01:23:12 +08:00
stm32l1 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
stm32l4 boards/arm/stm32l4/stm32l476vg-disco: Add CMakeLists.txt. 2026-09-28 06:43:27 -03:00
stm32l5 stm32l5: Fix nxstyle errors in drivers and board LEDs 2026-09-22 09:21:35 -03:00
stm32n6 boards/arm/stm32n6: add initial STM32N6570-DK support 2026-10-06 15:34:14 -03:00
stm32u0 boards/stm32u0: add stm32u083c-dk support 2026-08-18 15:00:15 +02:00
stm32u3 boards/arm/stm32u3: Add NUCLEO-U3C5ZI-Q support 2026-08-23 11:03:03 +08:00
stm32u5 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
stm32wb arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
stm32wl5 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
str71x/olimex-strp711 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
tiva arch/arm: Reach an NXFLAT module's read-only data through the GOT. 2026-09-27 11:25:12 -03:00
tlsr82/tlsr8278adk80d arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
tms570 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
xmc4 arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00