Fix VFP build failure in Cortex-A tx_thread_schedule.S

[mehmetteren]

Description

Fixes undefined symbol errors (IRQ_MASK / FIQ_MASK) when building Cortex-A ports (GNU/AC6) with TX_ENABLE_VFP_SUPPORT.

These masks (0x80/0x40) are required for the VFP context restore logic but were missing from tx_thread_schedule.S.

Validation

Hardware: Xilinx Zynq-7000 (ZC702)
Toolchain: GNU Arm Embedded
Result: Confirmed successful compilation and context switching with -DTX_ENABLE_VFP_SUPPORT.

PR checklist

• Updated function header with a short description and version number
• Added test case for bug fix or new feature
• Validated on real hardware

[Copilot]

Pull request overview

This PR fixes build failures in Cortex-A ports (A5, A7, A8, A9, A12, A15, A17) when compiling with VFP (Vector Floating Point) support enabled. The issue was that IRQ_MASK and FIQ_MASK constants were referenced in VFP-related interrupt restoration code but were not defined in the tx_thread_schedule.S files.

Key Changes:

• Added IRQ_MASK = 0x080 definition conditionally when TX_ENABLE_VFP_SUPPORT is defined
• Added FIQ_MASK = 0x040 definition conditionally when TX_ENABLE_FIQ_SUPPORT is defined

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ports/cortex_a5/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A5 GNU toolchain
ports/cortex_a5/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A5 AC6 toolchain
ports/cortex_a7/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A7 GNU toolchain
ports/cortex_a7/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A7 AC6 toolchain
ports/cortex_a8/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A8 GNU toolchain
ports/cortex_a8/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A8 AC6 toolchain
ports/cortex_a9/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A9 GNU toolchain
ports/cortex_a9/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A9 AC6 toolchain
ports/cortex_a12/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A12 GNU toolchain
ports/cortex_a12/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A12 AC6 toolchain
ports/cortex_a15/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A15 GNU toolchain
ports/cortex_a15/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A15 AC6 toolchain
ports/cortex_a17/gnu/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A17 GNU toolchain
ports/cortex_a17/ac6/src/tx_thread_schedule.S	Added IRQ_MASK and FIQ_MASK constant definitions for Cortex-A17 AC6 toolchain

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[fdesbiens]

Thank you for this contribution, @mehmetteren. I will ask a team member to review it.

[fdesbiens]

Hi @mehmetteren.

Thank you again for this contribution. I propose a few changes to your original PR.

1. Scope Expansion: Added the missing IRQ_MASK and FIQ_MASK definitions to the common architecture source file:
   ports_arch/ARMv7-A/threadx/common/src/tx_thread_schedule.S.

2. Copyright Updates: Updated the copyright headers in all 15 modified files (14 ports + 1 common) to include the
   "2026-present Eclipse ThreadX contributors" line.

3. Syntax Consistency: Converted the IRQ_MASK and FIQ_MASK definitions from assignment syntax (=) to the C
   preprocessor #define directive, ensuring consistency with existing constants like IRQ_MODE and SVC_MODE in the
   same files.

4. Formatting Consistency: Standardised the hexadecimal values to 2-digit format (0x80 and 0x40) to match the
   surrounding code style.

If you are fine with those, I will be happy to merge this to the dev branch right away. This would ship with our Q1 2026 release in a few days. Let me know what you think!

[mehmetteren]

LGTM, thanks for the changes @fdesbiens !