These patches add support for enable/disable d cache support. It reduces time for sha verification from more than 2 min to 3-4 sec on my platform. There are some of the observation which I am unable to explain. * It takes around 18 sec when I boot a kexec kernel and around 3-4 sec * when I boot a crash kernel. In case of kexec kernel start of 1st * segment is at 0000004000280000 and, end of last segment is at * 00000040029c0000. In case of crash kernel start of 1st segment is at * 00000041b9080000 and, end of last segment is at 00000041f9000000. Pratyush Anand (3): arm64: Add enable/disable d-cache support for purgatory arm64: Pass RAM boundary to purgatory arm64: Enable/disable D-cache before/after sha verification kexec/arch/arm64/include/types.h | 16 +++ kexec/arch/arm64/kexec-arm64.c | 16 ++- purgatory/arch/arm64/Makefile | 1 + purgatory/arch/arm64/cache.S | 222 +++++++++++++++++++++++++++++++++ purgatory/arch/arm64/cache.h | 42 +++++++ purgatory/arch/arm64/entry.S | 10 ++ purgatory/arch/arm64/purgatory-arm64.c | 12 ++ 7 files changed, 318 insertions(+), 1 deletion(-) create mode 100644 kexec/arch/arm64/include/types.h create mode 100644 purgatory/arch/arm64/cache.S create mode 100644 purgatory/arch/arm64/cache.h -- 2.1.0