Unverified Commit e97be4fb authored by Palmer Dabbelt's avatar Palmer Dabbelt
Browse files

Merge patch series "Add RISC-V 32 NOMMU support" 

Jesse Taube <mr.bossman075@gmail.com> says:

This patch-set aims to add NOMMU support to RV32.
Many people want to build simple emulators or HDL
models of RISC-V this patch makes it possible to
run linux on them.

Yimin Gu is the original author of this set.
Submitted here:
https://lists.buildroot.org/pipermail/buildroot/2022-November/656134.html

Though Jesse T rewrote the Dconf.

* b4-shazam-merge:
  riscv: configs: Add nommu PHONY defconfig for RV32
  riscv: Kconfig: Allow RV32 to build with no MMU

Link: https://lore.kernel.org/r/20230301002657.352637-1-Mr.Bossman075@gmail.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parents e45d6a52 77c0c966

arch/riscv/Kconfig

+2 −3
Original line number Diff line number Diff line
@@ -178,8 +178,8 @@ config MMU 


config PAGE_OFFSET

	hex

	default 0xC0000000 if 32BIT

	default 0x80000000 if 64BIT && !MMU

	default 0xC0000000 if 32BIT && MMU

	default 0x80000000 if !MMU

	default 0xff60000000000000 if 64BIT



config KASAN_SHADOW_OFFSET
@@ -280,7 +280,6 @@ config ARCH_RV32I 
	select GENERIC_LIB_ASHRDI3

	select GENERIC_LIB_LSHRDI3

	select GENERIC_LIB_UCMPDI2

	select MMU



config ARCH_RV64I

	bool "RV64I"

arch/riscv/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -174,3 +174,7 @@ rv64_randconfig: 
PHONY += rv32_defconfig

rv32_defconfig:

	$(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config



PHONY += rv32_nommu_virt_defconfig

rv32_nommu_virt_defconfig:

	$(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config