linux/arch/powerpc/platforms/microwatt/Kconfig

# SPDX-License-Identifier: GPL-2.0
config PPC_MICROWATT
	depends on PPC_BOOK3S_64 && !SMP
	bool "Microwatt SoC platform"
	select PPC_XICS
	select PPC_ICS_NATIVE
	select PPC_ICP_NATIVE
	select PPC_UDBG_16550
	select ARCH_RANDOM
	help
          This option enables support for FPGA-based Microwatt implementations.
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: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YMwWbZVREsVug9R0@thinks.paulus.ozlabs.org 2021-06-18 03:43:41 +00:00			`# SPDX-License-Identifier: GPL-2.0`
			`config PPC_MICROWATT`
			`depends on PPC_BOOK3S_64 && !SMP`
			`bool "Microwatt SoC platform"`
			`select PPC_XICS`
powerpc/xics: Add a native ICS backend for microwatt This is a simple native ICS backend that matches the layout of the Microwatt implementation of ICS. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> [mpe: Add empty ics_native_init() to unbreak non-microwatt builds] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> fixup-ics Link: https://lore.kernel.org/r/YMwW8cxrwB2W5EUN@thinks.paulus.ozlabs.org 2021-06-18 03:45:53 +00:00			`select PPC_ICS_NATIVE`
			`select PPC_ICP_NATIVE`
powerpc/microwatt: Use standard 16550 UART for console This adds support to the Microwatt platform to use the standard 16550-style UART which available in the standalone Microwatt FPGA. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YMwXGCTzedpQje7r@thinks.paulus.ozlabs.org 2021-06-18 03:46:32 +00:00			`select PPC_UDBG_16550`
powerpc/microwatt: Add support for hardware random number generator Microwatt's hardware RNG is accessed using the DARN instruction. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YMwXPHlV/ZleiQUY@thinks.paulus.ozlabs.org 2021-06-18 03:47:08 +00:00			`select ARCH_RANDOM`
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: Paul Mackerras <paulus@ozlabs.org> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YMwWbZVREsVug9R0@thinks.paulus.ozlabs.org 2021-06-18 03:43:41 +00:00			`help`
			`This option enables support for FPGA-based Microwatt implementations.`