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bdk: se: add T210 SHA256 silicon errata WAR

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Apparently, some T210 silicon have an undocumented errata where the MSG_LEFT2/3
registers are not ignored as they should.
When they have random data in POR they cause a hang as long as the message and
SHA calculation speed. So always clear them.
Additionally, clear MSG_LENGTH2/3 registers too even though they do not matter.
This commit is contained in:
CTCaer
2026-01-15 19:09:34 +02:00
parent 68281d3051
commit 5936d9bad4
1 changed files with 4 additions and 0 deletions
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4
bdk/sec/se.c
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@@ -512,10 +512,14 @@ static int _se_sha_hash_256(void *hash, u64 total_size, const void *src, u32 src
// Set total size: BITS(total_size), up to 2 EB.
SE(SE_SHA_MSG_LENGTH_0_REG) = (u32)(total_size << 3);
SE(SE_SHA_MSG_LENGTH_1_REG) = (u32)(total_size >> 29);
SE(SE_SHA_MSG_LENGTH_2_REG) = 0;
SE(SE_SHA_MSG_LENGTH_3_REG) = 0;
// Set leftover size: BITS(src_size).
SE(SE_SHA_MSG_LEFT_0_REG) = (u32)(msg_left << 3);
SE(SE_SHA_MSG_LEFT_1_REG) = (u32)(msg_left >> 29);
SE(SE_SHA_MSG_LEFT_2_REG) = 0;
SE(SE_SHA_MSG_LEFT_3_REG) = 0;
// Set config based on init or partial continuation.
if (total_size == src_size || !total_size)