Add support for vApplicationFPUSafeIRQHandler#1113
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## main #1113 +/- ##
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The application writer needs to name their IRQ handler as: 1. vApplicationIRQHandler if the IRQ handler does not use FPU registers. 2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers. When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler. Note that recent versions of GCC may use FP/SIMD registers to optimize 16-bytes copy and especially when using va_start()/va_arg() functions (e.g printing some thing in IRQ handlers may trigger usage of FPU registers) This implementation is heavily inspired by both the ARM_CA9 port and the ARM_CRx_No_GIC port done in [1] [1] FreeRTOS#1113 Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
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The application writer needs to name their IRQ handler as: 1. vApplicationIRQHandler if the IRQ handler does not use FPU registers. 2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers. When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler. Note that recent versions of GCC may use FP/SIMD registers to optimize 16-bytes copy and especially when using va_start()/va_arg() functions (e.g printing some thing in IRQ handlers may trigger usage of FPU registers) This implementation is heavily inspired by both the ARM_CA9 port and the ARM_CRx_No_GIC port done in [1] [1] FreeRTOS#1113 Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
asellaminxp
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Jan 22, 2025
The application writer needs to name their IRQ handler as: 1. vApplicationIRQHandler if the IRQ handler does not use FPU registers. 2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers. When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler. Note that recent versions of GCC may use FP/SIMD registers to optimize 16-bytes copy and especially when using va_start()/va_arg() functions (e.g printing some thing in IRQ handlers may trigger usage of FPU registers) This implementation is heavily inspired by both the ARM_CA9 port and the ARM_CRx_No_GIC port done in [1] [1] FreeRTOS#1113 Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
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archigup
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The application writer needs to name their IRQ handler as: 1. vApplicationIRQHandler if the IRQ handler does not use FPU registers. 2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers. When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler. Note that recent versions of GCC may use FP/SIMD registers to optimize 16-bytes copy and especially when using va_start()/va_arg() functions (e.g printing some thing in IRQ handlers may trigger usage of FPU registers) This implementation is heavily inspired by both the ARM_CA9 port and the ARM_CRx_No_GIC port done in [1] [1] #1113 Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
MinghuanLian
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Nov 26, 2025
The application writer needs to name their IRQ handler as: 1. vApplicationIRQHandler if the IRQ handler does not use FPU registers. 2. vApplicationFPUSafeIRQHandler is the IRQ handler uses FPU registers. When the application uses vApplicationFPUSafeIRQHandler, a default implementation of vApplicationIRQHandler is used which stores FPU registers and then calls vApplicationFPUSafeIRQHandler. Note that recent versions of GCC may use FP/SIMD registers to optimize 16-bytes copy and especially when using va_start()/va_arg() functions (e.g printing some thing in IRQ handlers may trigger usage of FPU registers) This implementation is heavily inspired by both the ARM_CA9 port and the ARM_CRx_No_GIC port done in [1] [1] FreeRTOS#1113 Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
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Description
This PR adds support for
vApplicationFPUSafeIRQHandler. The application writer needs to name their IRQ handler as:vApplicationIRQHandlerif the IRQ handler does not use FPU registers.vApplicationFPUSafeIRQHandleris the IRQ handler uses FPU registers.When the application uses
vApplicationFPUSafeIRQHandler, a default implementation ofvApplicationIRQHandleris used which stores FPU registers and then callsvApplicationFPUSafeIRQHandler.Test Steps
Tested on ARM_CRx_No_GIC Demo with the code snippet
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