On Tuesday 24 April 2018 06:50 PM, Tom Rini wrote: > On Tue, Apr 24, 2018 at 06:24:46PM +0530, Lokesh Vutla wrote: > >> Add a Kconfig entry for MMU and imply for all platforms >> using cache-cp15.c. Using imply instead of select so that >> MMU can be disabled by defconfigs when not needed. >> >> Signed-off-by: Lokesh Vutla <lokeshvu...@ti.com> >> --- >> arch/arm/Kconfig | 15 +++++++++++++++ >> arch/arm/lib/Makefile | 6 +----- >> 2 files changed, 16 insertions(+), 5 deletions(-) >> >> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig >> index de36ab6701..fe5bff097d 100644 >> --- a/arch/arm/Kconfig >> +++ b/arch/arm/Kconfig >> @@ -74,6 +74,12 @@ config ARM_ASM_UNIFIED >> config THUMB2_KERNEL >> bool >> >> +config MMU >> + bool "MMU-based Paged Memory Management Support" >> + help >> + Select if you want MMU-based virtualised addressing space >> + support by paged memory management. >> + >> # If set, the workarounds for these ARM errata are applied early during >> U-Boot >> # startup. Note that in general these options force the workarounds to be >> # applied; no CPU-type/version detection exists, unlike the similar options >> in >> @@ -158,33 +164,40 @@ config ARM_ERRATA_855873 >> config CPU_ARM720T >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_ARM920T >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_ARM926EJS >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_ARM946ES >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_ARM1136 >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_ARM1176 >> bool >> select HAS_VBAR >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_V7 >> bool >> select HAS_VBAR >> select HAS_THUMB2 >> select SYS_CACHE_SHIFT_6 >> + imply MMU >> >> config CPU_V7M >> bool >> @@ -200,10 +213,12 @@ config CPU_V7R >> config CPU_PXA >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config CPU_SA1100 >> bool >> select SYS_CACHE_SHIFT_5 >> + imply MMU >> >> config SYS_CPU >> default "arm720t" if CPU_ARM720T >> diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile >> index 3d3085e917..f907adc161 100644 >> --- a/arch/arm/lib/Makefile >> +++ b/arch/arm/lib/Makefile >> @@ -63,11 +63,7 @@ obj-y += reset.o >> endif >> >> obj-y += cache.o >> -ifndef CONFIG_ARM64 >> -ifndef CONFIG_CPU_V7M >> -obj-y += cache-cp15.o >> -endif >> -endif >> +obj-$(CONFIG_MMU) += cache-cp15.o >> >> obj-y += psci-dt.o > > So, funny enough. We have CONFIG_MMU code in ARM today that I bet > doesn't work and is just copy/pasted from the kernel and we should drop. > > For right here, I think I'd rather see some CONFIG flag about > CONFIG_SYS_ARM_CACHE_CP15 instead.
Sure will update it in next version. Thanks and regards, Lokesh _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
