commit 12da0b2d8fbd15eff70dfe3ff3d42477ed9f4ad2
author Timothy Chen <timothytim@google.com> Thu Mar 11 23:06:33 2021 -0800
committer tjaychen <timothytim@google.com> Thu Mar 18 10:58:11 2021 -0700
tree aca8d42228f1a843fe3a62b79974b09283ce673a
parent 4769007560230561c3575147d4c3cbbc59aa3626

[sw] remove entropy_src work arounds for aes

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

sw/device/tests/aes_test.c

diff --git a/sw/device/tests/aes_test.c b/sw/device/tests/aes_test.c
index 93a04df..6c88beb 100644
--- a/sw/device/tests/aes_test.c
+++ b/sw/device/tests/aes_test.c
@@ -90,14 +90,6 @@
           kCipherTextGold[i], buffer[i]);
   }
 
-  // Disable and re-enable EDN0 to get some more entropy out of it. This is
-  // dirty and needs to be reworked. We need to setup CSRNG/EDN to continously
-  // provide entropy.
-  mmio_region_write32(mmio_region_from_addr(TOP_EARLGREY_EDN0_BASE_ADDR),
-                      EDN_CTRL_REG_OFFSET, 0x0);
-  mmio_region_write32(mmio_region_from_addr(TOP_EARLGREY_EDN0_BASE_ADDR),
-                      EDN_CTRL_REG_OFFSET, 0x1);
-
   // Decode
   aes_cfg.operation = kAesDec;
   aes_init(aes_cfg);

sw/device/tests/dif/dif_aes_smoketest.c

diff --git a/sw/device/tests/dif/dif_aes_smoketest.c b/sw/device/tests/dif/dif_aes_smoketest.c
index 0d23423..304a842 100644
--- a/sw/device/tests/dif/dif_aes_smoketest.c
+++ b/sw/device/tests/dif/dif_aes_smoketest.c
@@ -132,14 +132,6 @@
           cipher_text_gold_words[i], out_data_cipher.data[i]);
   }
 
-  // Disable and re-enable EDN0 to get some more entropy out of it. This is
-  // dirty and needs to be reworked. We need to setup CSRNG/EDN to continously
-  // provide entropy.
-  mmio_region_write32(mmio_region_from_addr(TOP_EARLGREY_EDN0_BASE_ADDR),
-                      EDN_CTRL_REG_OFFSET, 0x0);
-  mmio_region_write32(mmio_region_from_addr(TOP_EARLGREY_EDN0_BASE_ADDR),
-                      EDN_CTRL_REG_OFFSET, 0x1);
-
   // Setup ECB decryption transaction.
   transaction.mode = kDifAesModeDecrypt;
   CHECK(dif_aes_start_ecb(&aes, &transaction, key) == kDifAesStartOk);