Commit 53d143fe authored by Paul Mackerras's avatar Paul Mackerras Committed by Michael Ellerman
Browse files

powerpc: Add Microwatt platform 



Microwatt is a FPGA-based implementation of the Power ISA.  It
currently only implements little-endian 64-bit mode, and does
not (yet) support SMP, VMX, VSX or transactional memory.  It has an
optional FPU, and an optional MMU (required for running Linux,
obviously) which implements a configurable radix tree but not
hypervisor mode or nested radix translation.

This adds a new machine type to support FPGA-based SoCs with a
Microwatt core.  CONFIG_MATH_EMULATION can be selected for Microwatt
SOCs which don't have the FPU.

Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
Reviewed-by: default avatarNicholas Piggin <npiggin@gmail.com>
Reviewed-by: default avatarSegher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/YMwWbZVREsVug9R0@thinks.paulus.ozlabs.org
parent c988cfd3

arch/powerpc/Kconfig

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@@ -430,7 +430,7 @@ source "kernel/Kconfig.hz" 


config MATH_EMULATION

	bool "Math emulation"

	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE

	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT

	select PPC_FPU_REGS

	help

	  Some PowerPC chips designed for embedded applications do not have

arch/powerpc/platforms/Kconfig

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@@ -21,6 +21,7 @@ source "arch/powerpc/platforms/44x/Kconfig" 
source "arch/powerpc/platforms/40x/Kconfig"

source "arch/powerpc/platforms/amigaone/Kconfig"

source "arch/powerpc/platforms/book3s/Kconfig"

source "arch/powerpc/platforms/microwatt/Kconfig"



config KVM_GUEST

	bool "KVM Guest support"

arch/powerpc/platforms/Makefile

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@@ -23,3 +23,4 @@ obj-$(CONFIG_PPC_PS3) += ps3/ 
obj-$(CONFIG_EMBEDDED6xx)	+= embedded6xx/

obj-$(CONFIG_AMIGAONE)		+= amigaone/

obj-$(CONFIG_PPC_BOOK3S)	+= book3s/

obj-$(CONFIG_PPC_MICROWATT)	+= microwatt/

arch/powerpc/platforms/microwatt/Kconfig

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# SPDX-License-Identifier: GPL-2.0

config PPC_MICROWATT

	depends on PPC_BOOK3S_64 && !SMP

	bool "Microwatt SoC platform"

	select PPC_XICS

	select PPC_NATIVE

	help

          This option enables support for FPGA-based Microwatt implementations.

arch/powerpc/platforms/microwatt/Makefile

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obj-y	+= setup.o