lib/memlog/trusty-log.h

/*
 * Copyright (c) 2015 Google, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _TRUSTY_LOG_H_
#define _TRUSTY_LOG_H_

/*
 * Ring buffer that supports one secure producer thread and one
 * linux side consumer thread.
 */
struct log_rb {
	volatile uint32_t alloc;
	volatile uint32_t put;
	uint32_t sz;
	volatile char data[0];
} __packed;

#define SMC_SC_SHARED_LOG_VERSION	SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 0)
#define SMC_SC_SHARED_LOG_ADD		SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 1)
#define SMC_SC_SHARED_LOG_RM		SMC_STDCALL_NR(SMC_ENTITY_LOGGING, 2)

#define TRUSTY_LOG_API_VERSION	1

#endif