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Currently the stack limit margin is hard-coded in each port's call to
`mp_stack_set_limit()`, but on threaded ports it's fiddlier and can lead to
bugs (such as incorrect thread stack margin on esp32).

This commit provides a new API to initialise the C Stack in one function
call, with a config macro to set the margin.  Where possible the new call
is inlined to reduce code size in thread-free ports.

Intended replacement for `MP_TASK_STACK_LIMIT_MARGIN` on esp32.

The previous `stackctrl.h` API is still present and unmodified apart from a
deprecation comment.  However it's not available when the
`MICROPY_PREVIEW_VERSION_2` macro is set.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

These were changed in v1.11 (2019).  Prepare to remove the compatibility
macros as part of V2 changes.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

Signed-off-by: Peter Züger <zueger.peter@icloud.com>

`mbedtls_pk_parse_key()` expects `key_len` to include the NULL terminator
for PEM data but not for DER encoded data.  This also applies to
`mbedtls_x509_crt_parse()` and `cert_len`.

Since all PEM data contains "-----BEGIN" this is used to check if the data
is PEM (as per mbedtls code).

This can be done for both v2 and v3 of mbedtls since the fundamental
behaviour/expectation did not change.  What changed is that in v3 the
PKCS#8 DER parser now checks that the passed key buffer is fully utilized
and no bytes are remaining (all other DER formats still do not check this).
Signed-off-by: Peter Züger <zueger.peter@icloud.com>

`get_lan()`: If the ethernet MAC address is uninitialised, set it to the
address reserved by the ESP32 for the ETH interface.

SPI LAN devices may be initialised with a MAC address of 00:00:00:00:00:00.
So check that a valid unicast MAC address has been set (using
`LAN.config(mac=...)`) when initialising the LAN interface.

Fixes #15425.
Signed-off-by: Glenn Moloney <glenn.moloney@gmail.com>

This PR ensures that `network.LAN.active(True/False)` will succeed if the
LAN is already in the desired state.

Currently, `lan.active(True)` will raise an `OSError` exception if the LAN
is already in the desired state.  This is inconsistent with
`network.WLAN.active(True/False)` and causes `lan.active(True)` to raise an
exception after a soft reset (causing common network startup scripts to
fail for LAN interfaces).
Signed-off-by: Glenn Moloney <glenn.moloney@gmail.com>

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

These are the new helper functions to use for polling/waiting.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

The reason for this change is that it makes allows custom code, that needs
to use an MPU region, to find a free one by using this macro or starting
from the max number and downwards, without concern that it might change in
the future.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

The callback arg is not actually required.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Tested with two VMs each running on a different core.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

This causes multiple definition of symbols on some builds.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Add native gchelper support for 64 bits RISC-V RV64I targets.

Now that RV64 is under CI, this also enables platform-specific ghelper
in the Unix port.

Also changes the data type holding the register contents to something more
appropriate, so in the remote eventuality somebody wants to use this with
RV128 all they have to do is update the `__riscv_xlen` check.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>

Gives the same output and keeps things consistent across the code base.
Signed-off-by: Damien George <damien@micropython.org>

Updating a set must use `.update()` rather than `.add()`.

Also apply the same pattern to qemu-riscv to prevent the same issue when
directories/files are added to that port's `tests_profile.txt` file.
Signed-off-by: Damien George <damien@micropython.org>

Based on machine_i2s_rate, allows testing basic SPI functionality and
timings.

Implemented and confirmed working for rp2, esp32, and pyboard.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

This was missed in 9ba04cc7Signed-off-by: Damien George <damien@micropython.org>

Finalisers that run during `gc_sweep_all()` may run native code, for
example if an open file is closed and the underlying block device is
implemented in native code, then the filesystem driver (eg FAT) may call
into the native code.

Therefore, native code must be freed after the call to `gc_sweep_all()`.
That can only be achieved if the GC heap is not used to store the list of
allocated native code blocks.  Instead, this commit makes the native code
blocks a linked list.
Signed-off-by: Damien George <damien@micropython.org>

Without this commit, math.gamma(-float("inf")) returns inf instead of
raising a math domain ValueError. Needed for float/math_domain_special.py
test to pass on esp32.

Root cause is an upstream libm bug, has been reported to ESP-IDF.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

This is needed for a workaround on esp32 port (in child commit),
which produces incorrect results otherwise.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

The `emit_load_reg_with_object()` helper function will clobber `REG_TEMP0`.
This is currently OK on architectures where `REG_RET` and `REG_TEMP0` are
the same (all architectures except RV32), because all callers of
`emit_load_reg_with_object()` use either `REG_RET` or `REG_TEMP0` as the
destination register.  But on RV32 these registers are different and so
when `REG_RET` is the destination, `REG_TEMP0` is clobbered, leading to
incorrectly generated machine code.

This commit fixes the issue simply by using `REG_TEMP0` as the destination
register for all uses of `emit_load_reg_with_object()`, and adds a comment
to make sure the caller of this function is careful.
Signed-off-by: Damien George <damien@micropython.org>

Add `machine_i2s_deinit_all` to teardown any active I2S instances on soft
reset.  Prior to this fix, code using I2S required a try/finally in order
to avoid a hard fault on soft reset.

Fixes issue #14339.
Signed-off-by: Phil Howard <phil@gadgetoid.com>

This change has no impact on vanilla MicroPython builds, but is intended to
avoid RP2's PIO implementation from trampling PIO usage in USER_C_MODULES.

This is consistent with PIOs tracking of used state machines and managed
programs, and makes working with PIO in USER_C_MODULES much less of an
uphill battle.

Since PIO deinit runs before gc_sweep_all it's impossible to work around
this wrinkle otherwise.  A module finalizer does not get the opportunity to
put the PIOs back into a state which wont crash rp2_pio_deinit.

Changes are:
- init: Avoid exclusive handlers being added to all PIOs and add them only
  when needed.
- deinit: Only remove handlers we have set.
- rp2_pio_irq: Add the exlusive handler if needed.
- rp2_state_machine_irq: Add the exclusive handler if needed.
Signed-off-by: Phil Howard <phil@gadgetoid.com>

Reduce mimimum heap requirement.  This value allows more room for large,
static buffers in user C modules (such as graphics buffers or otherwise)
which might be allocated outside of MicroPython's heap to guarantee
alignment or avoid fragmentation.
Signed-off-by: Phil Howard <phil@gadgetoid.com>

Add an 8MB "PIMORONI_TINY2040" variant.
Signed-off-by: Phil Howard <phil@gadgetoid.com>

Combine the 4MB and 16MB "PIMORONI_PICOLIPO" variants into a single board.
Signed-off-by: Phil Howard <phil@gadgetoid.com>

Add MICROPY_DEF_BOARD as per esp32 port, allows board variants to override
the board name with:

    list(APPEND MICROPY_DEF_BOARD
        MICROPY_HW_BOARD_NAME="New Board Name"
    )
Signed-off-by: Phil Howard <phil@gadgetoid.com>

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

ESP-IDF driver always requires at least two DMA buffers, so ensure that's
the case.

Failures during initialisation were being lost because ESP_ERROR_CHECK is
configured as a no-op, so the failure was deferred until read() or write()
was called on the port.  Raise an error from init, instead.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

Also rename the test to reflect that it's a soft timer test.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

Signed-off-by: Tim Weber <scy@scy.name>

Introduce SRC_USERMOD_LIB_ASM to allow users to include assembly files as
part of their user modules.  It could be used to include optimized
functions or outputs of other programming languages.
Signed-off-by: George Hopkins <george-hopkins@null.net>

It seems like at some point Espressif NimBLE team changed
nimble_port_init and nimble_port_deinit to manage HCI init
internally:
https://github.com/espressif/esp-nimble/commit/f8a79b04c9743543b8959727d7

This change is included in all the IDF versions that MicroPython supports.

As a result, existing code that called esp_nimble_hci_deinit() explicitly
would trigger a use-after-free bug and heap corruption (specifically this
calls through to ble_transport_deinit() which calls os_mempool_free(). The
second time this writes out to a bunch of memory pools where the backing
buffers have already been freed.)

Symptoms were intermittent random crashes after de-activating Bluetooth
(running multi_bluetooth/ble_gatt_data_transfer.py could sometimes
reproduce). Setting Heap Poisoning to Comprehensive in menuconfig caused
the bug to be detected every time.

This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Swap FMC banks to remap the SDRAM bank1 address to 0x60000000.  Arduino's
M4 firmware uses address 0x60000000 by default.  When the elf loader tries
to load that it will fail because by default NOR/PSRAM is mapped at that
address, not SDRAM bank1.  (Note that the region at 0xC0000000 has an XN
attribute by default, so switching the M4 firmware address will not work.)
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Previously it was truncating the first digit of the version if the major
number had more than one digit.
Signed-off-by: Andrew Leech <andrew@alelec.net>

The RV32 code emitter assumed that the arch-specific NLR was used
instead of the setjmp/longjmp based NLR code.  If the latter NLR
provider was chosen, the emitter would allocate space on the stack
for the NLR buffer but would not fill it in.

This change turns off setjmp()-based NLR and GCREGS for the ESP32C3
target, in favour of more platform-tailored alternatives.  As setjmp()
NLR is now disabled by default, the RV32 emitter can be safely enabled
by default as well for the target in question.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>

Before, the input was still set to `pin.irq()` mode, only the handler was
disabled.  That prevented switching the pin between input and output mode.
Signed-off-by: robert-hh <robert@hammelrath.com>