commit a7a50bdf97e8dd5e1ca5e52d4812bdd41626ad14
author Timothy Chen <timothytim@google.com> Thu Jun 24 18:08:32 2021 -0700
committer tjaychen <timothytim@google.com> Wed Jun 30 16:02:00 2021 -0700
tree 777ce1fb3df9662f5f26d98f54b58ae9dbe33760
parent 931f12085f10d3948b457cdedf48a6d6e4435bda

[sw] Add option to configure sideload in kmac dif

Signed-off-by: Timothy Chen <timothytim@google.com>

sw/device/lib/dif/dif_kmac.c

diff --git a/sw/device/lib/dif/dif_kmac.c b/sw/device/lib/dif/dif_kmac.c
index 42d1fe2..420fc92 100644
--- a/sw/device/lib/dif/dif_kmac.c
+++ b/sw/device/lib/dif/dif_kmac.c
@@ -187,6 +187,8 @@
   cfg_reg = bitfield_bit32_write(cfg_reg, KMAC_CFG_ENTROPY_FAST_PROCESS_BIT,
                                  config.entropy_fast_process);
   cfg_reg =
+      bitfield_bit32_write(cfg_reg, KMAC_CFG_SIDELOAD_BIT, config.sideload);
+  cfg_reg =
       bitfield_bit32_write(cfg_reg, KMAC_CFG_ENTROPY_READY_BIT, entropy_ready);
   mmio_region_write32(kmac->params.base_addr, KMAC_CFG_REG_OFFSET, cfg_reg);
 

sw/device/lib/dif/dif_kmac.h

diff --git a/sw/device/lib/dif/dif_kmac.h b/sw/device/lib/dif/dif_kmac.h
index 7009044..2b9a04d 100644
--- a/sw/device/lib/dif/dif_kmac.h
+++ b/sw/device/lib/dif/dif_kmac.h
@@ -155,6 +155,12 @@
    * granularity.
    */
   bool output_big_endian;
+
+  /**
+   * Place kmac inside key sideload mode
+   */
+  bool sideload;
+
 } dif_kmac_config_t;
 
 /**