237 lines
7.0 KiB
C
237 lines
7.0 KiB
C
/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __SCM_H__
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#define __SCM_H__
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/* 8 Byte SSD magic number (LE) */
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#define DECRYPT_MAGIC_0 0x73737A74
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#define DECRYPT_MAGIC_1 0x676D6964
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#define ENCRYPT_MAGIC_0 0x6B647373
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#define ENCRYPT_MAGIC_1 0x676D6973
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#define SSD_HEADER_MAGIC_SIZE 8
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#define SSD_HEADER_XML_SIZE 2048
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#define SSD_HEADER_MIN_SIZE 128
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#define MULTIPLICATION_FACTOR 2
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typedef unsigned int uint32;
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typedef struct {
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uint32 len;
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uint32 buf_offset;
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uint32 resp_hdr_offset;
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uint32 id;
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} scm_command;
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typedef struct {
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uint32 len;
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uint32 buf_offset;
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uint32 is_complete;
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} scm_response;
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typedef struct {
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uint32 *img_ptr;
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uint32 *img_len_ptr;
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} img_req;
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typedef struct {
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uint32 id;
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uint32 spare;
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} tz_secure_cfg;
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typedef struct {
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uint32 md_len;
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uint32* md;
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} ssd_parse_md_req;
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typedef struct {
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uint32 status;
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uint32 md_ctx_id;
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uint32* md_end_ptr;
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} ssd_parse_md_rsp;
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typedef struct {
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uint32 md_ctx_id;
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uint32 last_frag;
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uint32 frag_len;
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uint32 *frag;
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} ssd_decrypt_img_frag_req;
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typedef struct {
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uint32 status;
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} ssd_decrypt_img_frag_rsp;
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typedef struct{
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uint32 feature_id;
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} feature_version_req;
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typedef struct{
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uint32 version;
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} feature_version_rsp;
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typedef struct{
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uint32 *keystore_ptr;
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uint32 keystore_len;
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} ssd_protect_keystore_req;
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typedef struct{
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uint32 status;
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} ssd_protect_keystore_rsp;
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/* Service IDs */
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#define TZBSP_SVC_INFO 0x06
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#define SCM_SVC_SSD 0x07
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#define SVC_MEMORY_PROTECTION 0x0C
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/*Service specific command IDs */
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#define SSD_DECRYPT_ID 0x01
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#define SSD_ENCRYPT_ID 0x02
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#define SSD_PROTECT_KEYSTORE_ID 0x05
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#define SSD_PARSE_MD_ID 0x06
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#define SSD_DECRYPT_IMG_FRAG_ID 0x07
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#define SECURE_DEVICE_MDSS 0x01
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#define IOMMU_SECURE_CFG 0x02
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#define TZ_INFO_GET_FEATURE_ID 0x03
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/* SSD parsing status messages from TZ */
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#define SSD_PMD_ENCRYPTED 0
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#define SSD_PMD_NOT_ENCRYPTED 1
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#define SSD_PMD_NO_MD_FOUND 3
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#define SSD_PMD_BUSY 4
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#define SSD_PMD_BAD_MD_PTR_OR_LEN 5
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#define SSD_PMD_PARSING_INCOMPLETE 6
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#define SSD_PMD_PARSING_FAILED 7
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#define SSD_PMD_SETUP_CIPHER_FAILED 8
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/* Keystore status messages */
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#define TZBSP_SSD_PKS_SUCCESS 0 /**< Successful return. */
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#define TZBSP_SSD_PKS_INVALID_PTR 1 /**< Keystore pointer invalid. */
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#define TZBSP_SSD_PKS_INVALID_LEN 2 /**< Keystore length incorrect. */
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#define TZBSP_SSD_PKS_UNALIGNED_PTR 3 /**< Keystore pointer not word
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aligned. */
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#define TZBSP_SSD_PKS_PROTECT_MEM_FAILED 4 /**< Failure when protecting
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the keystore memory.*/
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#define TZBSP_SSD_PKS_INVALID_NUM_KEYS 5 /**< Unsupported number of
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keys passed. If a valid
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pointer to non-secure
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memory is passed that
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isn't a keystore, this is
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a likely return code. */
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#define TZBSP_SSD_PKS_DECRYPT_FAILED 6 /**< The keystore could not be
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decrypted. */
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/* Features in TZ */
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#define TZBSP_FVER_SSD 5
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#define TZBSP_GET_FEATURE_VERSION(major) ((major >> 22)& 0x3FF)
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static uint32 smc(uint32 cmd_addr);
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int decrypt_scm(uint32_t ** img_ptr, uint32_t * img_len_ptr);
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int decrypt_scm_v2(uint32_t ** img_ptr, uint32_t * img_len_ptr);
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int encrypt_scm(uint32_t ** img_ptr, uint32_t * img_len_ptr);
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int scm_svc_version(uint32 * major, uint32 * minor);
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int scm_protect_keystore(uint32_t * img_ptr, uint32_t img_len);
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#define SCM_SVC_FUSE 0x08
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#define SCM_BLOW_SW_FUSE_ID 0x01
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#define SCM_IS_SW_FUSE_BLOWN_ID 0x02
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#define HLOS_IMG_TAMPER_FUSE 0
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#define SCM_SVC_CE_CHN_SWITCH_ID 0x04
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#define SCM_CE_CHN_SWITCH_ID 0x02
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#define SCM_SVC_ES 0x10
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#define SCM_SAVE_PARTITION_HASH_ID 0x01
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enum ap_ce_channel_type {
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AP_CE_REGISTER_USE = 0,
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AP_CE_ADM_USE = 1
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};
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/* Apps CE resource. */
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#define TZ_RESOURCE_CE_AP 2
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uint8_t switch_ce_chn_cmd(enum ap_ce_channel_type channel);
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void set_tamper_fuse_cmd();
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/**
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* struct scm_command - one SCM command buffer
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* @len: total available memory for command and response
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* @buf_offset: start of command buffer
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* @resp_hdr_offset: start of response buffer
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* @id: command to be executed
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* @buf: buffer returned from scm_get_command_buffer()
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*
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* An SCM command is layed out in memory as follows:
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*
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* ------------------- <--- struct scm_command
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* | command header |
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* ------------------- <--- scm_get_command_buffer()
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* | command buffer |
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* ------------------- <--- struct scm_response and
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* | response header | scm_command_to_response()
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* ------------------- <--- scm_get_response_buffer()
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* | response buffer |
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* -------------------
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*
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* There can be arbitrary padding between the headers and buffers so
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* you should always use the appropriate scm_get_*_buffer() routines
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* to access the buffers in a safe manner.
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*/
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struct scm_command {
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uint32_t len;
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uint32_t buf_offset;
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uint32_t resp_hdr_offset;
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uint32_t id;
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uint32_t buf[0];
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};
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/**
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* struct scm_response - one SCM response buffer
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* @len: total available memory for response
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* @buf_offset: start of response data relative to start of scm_response
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* @is_complete: indicates if the command has finished processing
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*/
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struct scm_response {
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uint32_t len;
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uint32_t buf_offset;
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uint32_t is_complete;
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};
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#endif
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