ESP32: Increase Erlang boot.avm partition to 512KB#2254
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bettio merged 1 commit intoatomvm:release-0.7from Apr 3, 2026
Merged
ESP32: Increase Erlang boot.avm partition to 512KB#2254bettio merged 1 commit intoatomvm:release-0.7from
bettio merged 1 commit intoatomvm:release-0.7from
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The Erlang standard library has outgrown the 256KB boot.avm partition. Increase it to 512KB (0x80000), matching the Elixir partition layout. The main.avm offset moves from 0x210000 to 0x250000 for Erlang-only images. Both partition layouts now share the same offsets, so GetBootAVM.cmake switches from offset-based flavor detection to using the ATOMVM_ELIXIR_SUPPORT flag. This is a breaking change: users flashing applications to ESP32 devices must update their tooling to use 0x250000 instead of 0x210000. Signed-off-by: Davide Bettio <davide@uninstall.it>
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The Erlang standard library has outgrown the 256KB
boot.avmpartition on ESP32.This increases it to 512KB, matching the size already used by the Elixir partition layout.
partitions.csv: boot.avm size 0x40000 → 0x80000, main.avm offset 0x210000 → 0x250000GetBootAVM.cmake: switch flavor detection from offset-based toATOMVM_ELIXIR_SUPPORTflag, since both partition layouts now share the same main.avm offset
Breaking change
Users flashing applications to ESP32 devices with Erlang-only images must update their
flashing offset from
0x210000to0x250000.Notes
partitions.csvandpartitions-elixir.csvare now identical in content but kept asseparate files intentionally.
mkimage.config.in,flash.sh.in, andCMakeLists.txtdid not need changes: theyreference the boot.avm offset (0x1D0000, unchanged) or use CMake macros that
auto-resolve from the partition table.
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later