[PATCH RFC 0/3] arm64: disable/enable d-cache support for

[Pratyush Anand]

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

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2.1.0