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u-boot/include/tis.h

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tpm: Add TPM command library TPM command library implements a subset of TPM commands defined in TCG Main Specification 1.2 that are useful for implementing secure boot. More TPM commands could be added out of necessity. You may exercise these commands through the 'tpm' command. However, the raw TPM commands are too primitive for writing secure boot in command interpreter scripts; so the 'tpm' command also provides helper functions to make scripting easier. For example, to define a counter in TPM non-volatile storage and initialize it to zero: $ tpm init $ tpm startup TPM_ST_CLEAR $ tpm nv_define d 0x1001 0x1 $ tpm nv_write d 0x1001 0 And then increment the counter by one: $ tpm nv_read d 0x1001 i $ setexpr.l i $i + 1 $ tpm nv_write d 0x1001 $i Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
2013-02-28 17:34:57 +08:00
/*
* Copyright (c) 2011 The Chromium OS Authors.
*
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2013-07-08 15:37:19 +08:00
* SPDX-License-Identifier: GPL-2.0+
tpm: Add TPM command library TPM command library implements a subset of TPM commands defined in TCG Main Specification 1.2 that are useful for implementing secure boot. More TPM commands could be added out of necessity. You may exercise these commands through the 'tpm' command. However, the raw TPM commands are too primitive for writing secure boot in command interpreter scripts; so the 'tpm' command also provides helper functions to make scripting easier. For example, to define a counter in TPM non-volatile storage and initialize it to zero: $ tpm init $ tpm startup TPM_ST_CLEAR $ tpm nv_define d 0x1001 0x1 $ tpm nv_write d 0x1001 0 And then increment the counter by one: $ tpm nv_read d 0x1001 i $ setexpr.l i $i + 1 $ tpm nv_write d 0x1001 $i Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
2013-02-28 17:34:57 +08:00
*/
#ifndef __TIS_H
#define __TIS_H
#include <common.h>
/* Low-level interface to access TPM */
/*
* tis_init()
*
* Initialize the TPM device. Returns 0 on success or -1 on
* failure (in case device probing did not succeed).
*/
int tis_init(void);
/*
* tis_open()
*
* Requests access to locality 0 for the caller. After all commands have been
* completed the caller is supposed to call tis_close().
*
* Returns 0 on success, -1 on failure.
*/
int tis_open(void);
/*
* tis_close()
*
* terminate the currect session with the TPM by releasing the locked
* locality. Returns 0 on success of -1 on failure (in case lock
* removal did not succeed).
*/
int tis_close(void);
/*
* tis_sendrecv()
*
* Send the requested data to the TPM and then try to get its response
*
* @sendbuf - buffer of the data to send
* @send_size size of the data to send
* @recvbuf - memory to save the response to
* @recv_len - pointer to the size of the response buffer
*
* Returns 0 on success (and places the number of response bytes at recv_len)
* or -1 on failure.
*/
int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf,
size_t *recv_len);
#endif /* __TIS_H */
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