[U-Boot] [PATCH 1/4 v5] Exynos: Add hardware accelerated SHA256 and SHA1

[Simon Glass]

On Wed, Mar 6, 2013 at 6:18 AM, Akshay Saraswat <akshay.s at samsung.com> wrote:
> SHA-256 and SHA-1 accelerated using ACE hardware.
>
> Signed-off-by: ARUN MANKUZHI <arun.m at samsung.com>
> Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>

Acked-by: Simon Glass <sjg at chromium.org>

> ---
> Changes since v1:
>         - Moved code to drivers/crypto.
>         - Fixed few other nits.
>
> Changes since v2:
>         - Added falling back to software sha256 in case length exceeds buffer limit.
>         - Reduced one tab at lines 533, 559 and 571 in this patch.
>         - Removed space after a cast at line 506 in this patch.
>         - Removed blank line at line 561 in this patch.
>         - Removed space before semicolon at line 576 in this patch.
>
> Changes since v3:
>         - 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.
>
> Changes since v4:
>         - Added include for clk.h.
>         - Added define for MAX_FREQ.
>         - Added timeout calculation as per frequency.
>         - Changed "i+=4" to "i++" and "len" to "len/4" in for loop at line 591 in this patch.
>         - Added two new functions ace_sha256 and ace_sha1.
>
>  Makefile                               |   1 +
>  arch/arm/include/asm/arch-exynos/cpu.h |   4 +
>  drivers/crypto/Makefile                |  47 +++++
>  drivers/crypto/ace_sfr.h               | 310 +++++++++++++++++++++++++++++++++
>  drivers/crypto/ace_sha.c               | 138 +++++++++++++++
>  include/ace_sha.h                      |  67 +++++++
>  6 files changed, 567 insertions(+)
>  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
>