arm float: Add Kconfig options
Adds Kconfig options CPU_HAS_FPU, FLOAT and FP_SHARING for the arm architecture. NOTE: All SOCs in the MK64F12 family have an FPU so that makes it a convenient location to enable the hidden CPU_HAS_FPU option. Change-Id: I71771d24f20f52079314bb8db9bf8a0aa827ab41 Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
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@ -31,6 +31,39 @@ config CPU_CORTEX_M
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help
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This option signifies the use of a CPU of the Cortex-M family.
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config CPU_HAS_FPU
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# Hidden config selected by CPU family
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bool
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default n
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help
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This option is enabled when the CPU has a hardware floating point
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unit.
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menu "Floating Point Options"
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depends on CPU_HAS_FPU
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config FLOAT
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bool
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prompt "Floating point registers"
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default n
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help
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This option allows tasks and fibers to use the floating point registers.
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By default, only a single task or fiber may use the registers.
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Disabling this option means that any task or fiber that uses a
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floating point register will get a fatal exception.
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config FP_SHARING
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bool
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prompt "Floating point register sharing"
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depends on FLOAT
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default n
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help
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This option allows multiple tasks and fibers to use the floating point
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registers.
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endmenu
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if CPU_CORTEX_M
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source "arch/arm/core/cortex_m/Kconfig"
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endif
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@ -22,6 +22,7 @@ depends on SOC_SERIES_KINETIS_K6X
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config SOC_MK64F12
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bool "SOC_MK64F12"
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select HAS_KSDK
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select CPU_HAS_FPU
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endchoice
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