platform/msm_shared/include/scm.h

/* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __SCM_H__
#define __SCM_H__

/* 8 Byte SSD magic number (LE) */
#define DECRYPT_MAGIC_0 0x73737A74
#define DECRYPT_MAGIC_1 0x676D6964
#define ENCRYPT_MAGIC_0 0x6B647373
#define ENCRYPT_MAGIC_1 0x676D6973
#define SSD_HEADER_MAGIC_SIZE  8
#define SSD_HEADER_XML_SIZE    2048

typedef unsigned int uint32;

typedef struct {
	uint32 len;
	uint32 buf_offset;
	uint32 resp_hdr_offset;
	uint32 id;
} scm_command;

typedef struct {
	uint32 len;
	uint32 buf_offset;
	uint32 is_complete;
} scm_response;

typedef struct {
	uint32 *img_ptr;
	uint32 *img_len_ptr;
} img_req;

#define SCM_SVC_SSD                 7
#define SSD_DECRYPT_ID              0x01
#define SSD_ENCRYPT_ID              0x02

static uint32 smc(uint32 cmd_addr);

int decrypt_scm(uint32_t ** img_ptr, uint32_t * img_len_ptr);
int encrypt_scm(uint32_t ** img_ptr, uint32_t * img_len_ptr);

#define SCM_SVC_FUSE                0x08
#define SCM_BLOW_SW_FUSE_ID         0x01
#define SCM_IS_SW_FUSE_BLOWN_ID     0x02

#define HLOS_IMG_TAMPER_FUSE        0


#define SCM_SVC_CE_CHN_SWITCH_ID    0x04
#define SCM_CE_CHN_SWITCH_ID        0x02

enum ap_ce_channel_type {
AP_CE_REGISTER_USE = 0,
AP_CE_ADM_USE = 1
};

/* Apps CE resource. */
#define TZ_RESOURCE_CE_AP  2

uint8_t switch_ce_chn_cmd(enum ap_ce_channel_type channel);


void set_tamper_fuse_cmd();

/**
 * struct scm_command - one SCM command buffer
 * @len: total available memory for command and response
 * @buf_offset: start of command buffer
 * @resp_hdr_offset: start of response buffer
 * @id: command to be executed
 * @buf: buffer returned from scm_get_command_buffer()
 *
 * An SCM command is layed out in memory as follows:
 *
 *	------------------- <--- struct scm_command
 *	| command header  |
 *	------------------- <--- scm_get_command_buffer()
 *	| command buffer  |
 *	------------------- <--- struct scm_response and
 *	| response header |      scm_command_to_response()
 *	------------------- <--- scm_get_response_buffer()
 *	| response buffer |
 *	-------------------
 *
 * There can be arbitrary padding between the headers and buffers so
 * you should always use the appropriate scm_get_*_buffer() routines
 * to access the buffers in a safe manner.
 */
struct scm_command {
	uint32_t len;
	uint32_t buf_offset;
	uint32_t resp_hdr_offset;
	uint32_t id;
	uint32_t buf[0];
};

/**
 * struct scm_response - one SCM response buffer
 * @len: total available memory for response
 * @buf_offset: start of response data relative to start of scm_response
 * @is_complete: indicates if the command has finished processing
 */
struct scm_response {
	uint32_t len;
	uint32_t buf_offset;
	uint32_t is_complete;
};



#endif