Xtensa Port v3.13 Updates - #31
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- Update NX init logic to check whether a software interrupt is already registered before provisioning it for the scheduler. - Add new xt_get_interrupt_handler() API to enable above fix. - Fix exception dispatch assembly code to correctly provide the exception stack frame to imprecise exception handlers (NX only). - Confirm functionality on windowed/call0 configs with and without FreeRTOS MPU support. Signed-off-by: Ian Thompson <ianst@cadence.com>
- Merge pull request #2 from IPG-TIP-Xtensa/dev-xtensa-smp - Cadence/Xtensa: Add an assertion for SMP init ordering. - Cadence/Xtensa: Require RJ.5 tools - Cadence/Xtensa: SMP fixes to enable multicore Palladium - Cadence/Xtensa: Update coproc handling for SMP - Cadence/Xtensa: Limit outstanding CacheOps coming from L2 - Cadence/Xtensa: Update release notes for 3.10 release - Remove DRAM requirement - Call main() only for core 0 - Replicate/consolidate per-core intr/coproc data - Separate initial stacks per-core - Additional fixes and clean-up - Update release notes for 3.11 release - FreeRTOS/SMP: CP save bug-fix Signed-off-by: Ian Thompson <ianst@cadence.com>
- Extra space required for main() to call printf() without overflowing when argv[0] has a long path Signed-off-by: Ian Thompson <ianst@cadence.com>
- Enables xt_smp example to more accurately profile time taken in single vs. multicore test. Signed-off-by: Ian Thompson <ianst@cadence.com>
- Add per-core xclib reentrancy struct instances - Redefine reentrant pointer to __getreent() function via defining __DYNAMIC_REENT__ in xclib - Improve build infra to properly support overriding CFLAGS in nightly tests - Bump port rev to 3.12 Signed-off-by: Ian Thompson <ianst@cadence.com>
- Clear coproc owner thread when saving callee-saved state - Fix coproc init/release functions - Update readme and release notes Signed-off-by: Ian Thompson <ianst@cadence.com>
- Removes dependency on XTOS locks - Clarify v3.12 release notes Signed-off-by: Ian Thompson <ianst@cadence.com>
- xclib is required for 3.12 Signed-off-by: Ian Thompson <ianst@cadence.com>
- Resolve a couple of errors in <xtensa/xtsubsystem.h> when compiled with RJ.5 Xtensa toolchain and C++17. - Will no longer be necessary with RJ.6. Signed-off-by: Ian Thompson <ianst@cadence.com>
- LCOUNT needs to be cleared during solicited context switch, ISR entry - Prevents incorrect zero-overhead execution - Extra conditional logic required for overlay save/restore Signed-off-by: Ian Thompson <ianst@cadence.com>
Notes for Version 3.13 ---------------------- - FreeRTOS SMP support for newlib (experimental). - FreeRTOS SMP context switching performance improvements. - FreeRTOS SMP config option "XT_USE_L2RAM" moves data into L2RAM for context switching performance improvements. Disabled by default. - FreeRTOS SMP config option "XT_USE_DATARAM" moves per-core data into dataram for performance improvements. Disabled by default. - Based on FreeRTOS-Kernel V11.2.0 release in 3/2025. - Numerous fixes and improvements. Signed-off-by: Ian Thompson <ianst@cadence.com>
- Subsystem patch only required for RJ.5 tool-chain; do not apply for builds with earlier tools. Signed-off-by: Ian Thompson <ianst@cadence.com>
- Single-core multithreaded iDMA support - SMP iDMA support with pinned tasks - Example test and build infrastructure Signed-off-by: Ian Thompson <ianst@cadence.com>
- NX configs were reallocating a channel before it was fully cleaned up Signed-off-by: Ian Thompson <ianst@cadence.com>
- Xtensa port v3.13 tested and working with FreeRTOS-Kernel version 11.3.0. Signed-off-by: Ian Thompson <ianst@cadence.com>
AniruddhaKanhere
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Thank you for your contribution @ianstcdns.
The changes look good to me!
AniruddhaKanhere
enabled auto-merge (squash)
June 18, 2026 22:06
patrzhan
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Merge Cadence/Xtensa FreeRTOS port up through v3.13
New Features:
Various bug-fixes, notably:
Various optional performance improvements, including:
for context switching performance improvements. Disabled by default.
dataram for performance improvements. Disabled by default.
Developed and Tested with FreeRTOS-Kernel v11.2.0
Tested with FreeRTOS-Kernel v11.3.0
Signed-off-by: Ian Thompson ianst@cadence.com
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