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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "key_ladder.h"
#include "debug_printf.h"
#include "registers.h"
/* #include "setup.h" */
#include "dcrypto.h"
void key_ladder_step(uint32_t cert, const uint32_t *input)
{
uint32_t flags;
GREG32(KEYMGR, SHA_ITOP) = 0; /* Clear status. */
VERBOSE("Cert %2u: ", cert);
GWRITE_FIELD(KEYMGR, SHA_USE_CERT, INDEX, cert);
GWRITE_FIELD(KEYMGR, SHA_USE_CERT, ENABLE, 1);
GWRITE_FIELD(KEYMGR, SHA_CFG_EN, INT_EN_DONE, 1);
GWRITE_FIELD(KEYMGR, SHA_TRIG, TRIG_GO, 1);
if (input) {
int i;
for (i = 0; i < 8; ++i)
GREG32(KEYMGR, SHA_INPUT_FIFO) = *input++;
GWRITE_FIELD(KEYMGR, SHA_TRIG, TRIG_STOP, 1);
}
while (!GREG32(KEYMGR, SHA_ITOP))
;
GREG32(KEYMGR, SHA_ITOP) = 0; /* Clear status. */
flags = GREG32(KEYMGR, HKEY_ERR_FLAGS);
if (flags)
debug_printf("Cert %2u: fail %x\n", cert, flags);
else
VERBOSE("flags %x\n", flags);
}
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