[U-Boot] [PATCH 0/5 v4] Add ACE HW support for SHA 256

[Akshay Saraswat]

This patch set adds hardware acceleration for SHA 256
with the help of ACE.

Changes since v1:
	- Patch-1: Fixed few nits.
	- Patch-2: Removed not required config.
	- Patch-3: Added sha256 to hash command instead of new sha256 command.

Changes since v2:
        - Patch-1: 
		- Added falling back to software sha256 in case length exceeds buffer limit.
		- Reduced one tab at lines 533, 559 and 571 in the patch.
		- Removed space after a cast at line 506 in the patch.
		- Removed blank line at line 561 in the patch.
		- Removed space before semicolon at line 576 in the patch.
        - Patch-2: 
		- Added "SHA1" in the comment for config.
        - Patch-3: 
		- Added new nodes for SHA1 and SHA256 in struct hash_algo for the case when ACE is enabled.
		- Added new declaration for function pointer hash_func_ws with different return type.
        - Patch-4: 
		- New patch to enable config for hash command.

Changes since v3:
	- Patch-1:
		- Removed buffer limit since there are 2 regs for address hash_msg_size_high and low.
		  That means buffer length could go upto 2^64 bits which is practically 
		- Removed falling back to software sha256 because there is no buffer limit.
		- Removed "/ 4" to sha1 and sha256 lengths and added increment to 4 in for loop at line 573.
		- Timed out still kept to be 100 ms since this is enough for hardware to switch status to idle from busy.
		  In case it couldn't that means h/w is faulty.
	- Patch-2:
		- Added "Acked-by: Simon Glass <sjg at chromium.org>".
	- Patch-3:
		- New patch.
	- Patch-4:
		- Changed command names to lower case in algo struct.
		- Added generic ace_sha config.
	- Patch-5: Added acked-by Simon Glass
		- Added new generic config for ace_sha to enable ace support in hash.c.

Akshay Saraswat (5):
  Exynos: Add hardware accelerated SHA 256
  Exynos: config: Enable ACE HW for SHA 256 for Exynos
  gen: Change return type to int for hash_func_ws function pointer
  gen: Add ACE acceleration to hash
  Exynos: config: Enable hash command

 Makefile                               |   1 +
 arch/arm/include/asm/arch-exynos/cpu.h |   4 +
 common/hash.c                          |  14 ++
 drivers/crypto/Makefile                |  47 +++++
 drivers/crypto/ace_sfr.h               | 310 +++++++++++++++++++++++++++++++++
 drivers/crypto/ace_sha.c               | 122 +++++++++++++
 include/ace_sha.h                      |  42 +++++
 include/configs/exynos5250-dt.h        |   5 +
 include/hash.h                         |   2 +-
 include/sha1.h                         |   2 +-
 include/sha256.h                       |   2 +-
 lib/sha1.c                             |   4 +-
 lib/sha256.c                           |   4 +-
 13 files changed, 554 insertions(+), 5 deletions(-)
 create mode 100644 drivers/crypto/Makefile
 create mode 100644 drivers/crypto/ace_sfr.h
 create mode 100644 drivers/crypto/ace_sha.c
 create mode 100644 include/ace_sha.h

-- 
1.8.0