Commit 9657a872 authored Jan 30, 2012 by Greg Ungerer

m68k: make support for FPU hardware configurable

The classic m68k code has always supported an FPU (although it may have
been a software emulated one). The non-MMU m68k code has never supported FPU
hardware. To help in merging common code create a configation setting that
signifies if we are builing in FPU support or not.

This switch, CONFIG_FPU, is set as per the current use cases. So it is
always enabled if CONFIG_MMU is set, and disabled otherwise. With a little
extra code it will be possible to disable it on the classic m68k platforms
as well, and to enable it on non-MMU platforms that do have hardware FPU.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

parent 43dec91f

arch/m68k/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@ config M68K
		select GENERIC_IRQ_SHOW
		select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
		select GENERIC_CPU_DEVICES
		select FPU if MMU

		config RWSEM_GENERIC_SPINLOCK
		bool
		@@ -64,6 +65,9 @@ config CPU_HAS_NO_MULDIV64
		config CPU_HAS_ADDRESS_SPACES
		bool

		config FPU
		bool

		config HZ
		int
		default 1000 if CLEOPATRA

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