include/common/bl_common.h - filogic/atf - Gitiles

 /*
  * Copyright (c) 2013-2014, ARM Limited and Contributors. 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 ARM 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 __BL_COMMON_H__
 #define __BL_COMMON_H__

 #define SECURE		0x0
 #define NON_SECURE	0x1
 #define PARAM_EP_SECURITY_MASK    0x1

 #define UP	1
 #define DOWN	0

 /*******************************************************************************
  * Constants for loading images. When BLx wants to load BLy, it looks at a
  * meminfo structure to find the extents of free memory. Then depending upon
  * how it has been configured, it can either load BLy at the top or bottom of
  * the free memory. These constants indicate the choice.
  * TODO: Make this configurable while building the trusted firmware.
  ******************************************************************************/
 #define TOP_LOAD	0x1
 #define BOT_LOAD	!TOP_LOAD
 #define LOAD_MASK	(1 << 0)

 /******************************************************************************
  * Opcode passed in x0 to tell next EL that we want to run an image.
  * Corresponds to the function ID of the only SMC that the BL1 exception
  * handlers service. That's why the chosen value is the first function ID of
  * the ARM SMC64 range.
  *****************************************************************************/
 #define RUN_IMAGE	0xC0000000

 /*******************************************************************************
  * Constants that allow assembler code to access members of and the
  * 'entry_point_info' structure at their correct offsets.
  ******************************************************************************/
 #define ENTRY_POINT_INFO_PC_OFFSET	0x08
 #define ENTRY_POINT_INFO_ARGS_OFFSET	0x18

 #define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK)
 #define SET_SECURITY_STATE(x, security) \
 			((x) = ((x) & ~PARAM_EP_SECURITY_MASK) | (security))

 #define PARAM_EP     0x01
 #define PARAM_IMAGE_BINARY  0x02
 #define PARAM_BL31       0x03

 #define VERSION_1		0x01

 #define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
 	(_p)->h.type = (uint8_t)(_type); \
 	(_p)->h.version = (uint8_t)(_ver); \
 	(_p)->h.size = (uint16_t)sizeof(*_p); \
 	(_p)->h.attr = (uint32_t)(_attr) ; \
 	} while (0)

 #ifndef __ASSEMBLY__
 #include <cdefs.h> /* For __dead2 */
 #include <cassert.h>
 #include <stdint.h>

 /*******************************************************************************
  * Structure used for telling the next BL how much of a particular type of
  * memory is available for its use and how much is already used.
  ******************************************************************************/
 typedef struct meminfo {
 	unsigned long total_base;
 	long total_size;
 	unsigned long free_base;
 	long free_size;
 	unsigned long attr;
 	unsigned long next;
 } meminfo_t;

 typedef struct aapcs64_params {
 	unsigned long arg0;
 	unsigned long arg1;
 	unsigned long arg2;
 	unsigned long arg3;
 	unsigned long arg4;
 	unsigned long arg5;
 	unsigned long arg6;
 	unsigned long arg7;
 } aapcs64_params_t;

 /***************************************************************************
  * This structure provides version information and the size of the
  * structure, attributes for the structure it represents
  ***************************************************************************/
 typedef struct param_header {
 	uint8_t type;		/* type of the structure */
 	uint8_t version;    /* version of this structure */
 	uint16_t size;      /* size of this structure in bytes */
 	uint32_t attr;      /* attributes: unused bits SBZ */
 } param_header_t;

 /*****************************************************************************
  * This structure represents the superset of information needed while
  * switching exception levels. The only two mechanisms to do so are
  * ERET & SMC. Security state is indicated using bit zero of header
  * attribute
  * NOTE: BL1 expects entrypoint followed by spsr while processing
  * SMC to jump to BL31 from the start of entry_point_info
  *****************************************************************************/
 typedef struct entry_point_info {
 	param_header_t h;
 	uintptr_t pc;
 	uint32_t spsr;
 	aapcs64_params_t args;
 } entry_point_info_t;

 /*****************************************************************************
  * Image info binary provides information from the image loader that
  * can be used by the firmware to manage available trusted RAM.
  * More advanced firmware image formats can provide additional
  * information that enables optimization or greater flexibility in the
  * common firmware code
  *****************************************************************************/
 typedef struct image_info {
 	param_header_t h;
 	uintptr_t image_base;   /* physical address of base of image */
 	uint32_t image_size;    /* bytes read from image file */
 } image_info_t;

 /*******************************************************************************
  * This structure represents the superset of information that can be passed to
  * BL31 e.g. while passing control to it from BL2. The BL32 parameters will be
  * populated only if BL2 detects its presence. A pointer to a structure of this
  * type should be passed in X3 to BL31's cold boot entrypoint
  *
  * Use of this structure and the X3 parameter is not mandatory: the BL3-1
  * platform code can use other mechanisms to provide the necessary information
  * about BL3-2 and BL3-3 to the common and SPD code.
  *
  * BL3-1 image information is mandatory if this structure is used. If either of
  * the optional BL3-2 and BL3-3 image information is not provided, this is
  * indicated by the respective image_info pointers being zero.
  ******************************************************************************/
 typedef struct bl31_params {
 	param_header_t h;
 	image_info_t *bl31_image_info;
 	entry_point_info_t *bl32_ep_info;
 	image_info_t *bl32_image_info;
 	entry_point_info_t *bl33_ep_info;
 	image_info_t *bl33_image_info;
 } bl31_params_t;


 /*
  * Compile time assertions related to the 'entry_point_info' structure to
  * ensure that the assembler and the compiler view of the offsets of
  * the structure members is the same.
  */
 CASSERT(ENTRY_POINT_INFO_PC_OFFSET ==
 		__builtin_offsetof(entry_point_info_t, pc), \
 		assert_BL31_pc_offset_mismatch);

 CASSERT(ENTRY_POINT_INFO_ARGS_OFFSET == \
 		__builtin_offsetof(entry_point_info_t, args), \
 		assert_BL31_args_offset_mismatch);

 CASSERT(sizeof(unsigned long) ==
 		__builtin_offsetof(entry_point_info_t, spsr) - \
 		__builtin_offsetof(entry_point_info_t, pc), \
 		assert_entrypoint_and_spsr_should_be_adjacent);

 /*******************************************************************************
  * Function & variable prototypes
  ******************************************************************************/
 unsigned long page_align(unsigned long, unsigned);
 void change_security_state(unsigned int);
 unsigned long image_size(const char *);
 int load_image(meminfo_t *,
 		const char *,
 		unsigned int,
 		unsigned long,
 		image_info_t *,
 		entry_point_info_t *);
 extern const char build_message[];

 #endif /*__ASSEMBLY__*/

 #endif /* __BL_COMMON_H__ */
	/*
	* Copyright (c) 2013-2014, ARM Limited and Contributors. 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 ARM 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 __BL_COMMON_H__
	#define __BL_COMMON_H__

	#define SECURE 0x0
	#define NON_SECURE 0x1
	#define PARAM_EP_SECURITY_MASK 0x1

	#define UP 1
	#define DOWN 0

	/*******************************************************************************
	* Constants for loading images. When BLx wants to load BLy, it looks at a
	* meminfo structure to find the extents of free memory. Then depending upon
	* how it has been configured, it can either load BLy at the top or bottom of
	* the free memory. These constants indicate the choice.
	* TODO: Make this configurable while building the trusted firmware.
	******************************************************************************/
	#define TOP_LOAD 0x1
	#define BOT_LOAD !TOP_LOAD
	#define LOAD_MASK (1 << 0)

	/******************************************************************************
	* Opcode passed in x0 to tell next EL that we want to run an image.
	* Corresponds to the function ID of the only SMC that the BL1 exception
	* handlers service. That's why the chosen value is the first function ID of
	* the ARM SMC64 range.
	*****************************************************************************/
	#define RUN_IMAGE 0xC0000000

	/*******************************************************************************
	* Constants that allow assembler code to access members of and the
	* 'entry_point_info' structure at their correct offsets.
	******************************************************************************/
	#define ENTRY_POINT_INFO_PC_OFFSET 0x08
	#define ENTRY_POINT_INFO_ARGS_OFFSET 0x18

	#define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK)
	#define SET_SECURITY_STATE(x, security) \
	((x) = ((x) & ~PARAM_EP_SECURITY_MASK) \| (security))

	#define PARAM_EP 0x01
	#define PARAM_IMAGE_BINARY 0x02
	#define PARAM_BL31 0x03

	#define VERSION_1 0x01

	#define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
	(_p)->h.type = (uint8_t)(_type); \
	(_p)->h.version = (uint8_t)(_ver); \
	(_p)->h.size = (uint16_t)sizeof(*_p); \
	(_p)->h.attr = (uint32_t)(_attr) ; \
	} while (0)

	#ifndef __ASSEMBLY__
	#include <cdefs.h> /* For __dead2 */
	#include <cassert.h>
	#include <stdint.h>

	/*******************************************************************************
	* Structure used for telling the next BL how much of a particular type of
	* memory is available for its use and how much is already used.
	******************************************************************************/
	typedef struct meminfo {
	unsigned long total_base;
	long total_size;
	unsigned long free_base;
	long free_size;
	unsigned long attr;
	unsigned long next;
	} meminfo_t;

	typedef struct aapcs64_params {
	unsigned long arg0;
	unsigned long arg1;
	unsigned long arg2;
	unsigned long arg3;
	unsigned long arg4;
	unsigned long arg5;
	unsigned long arg6;
	unsigned long arg7;
	} aapcs64_params_t;

	/***************************************************************************
	* This structure provides version information and the size of the
	* structure, attributes for the structure it represents
	***************************************************************************/
	typedef struct param_header {
	uint8_t type; /* type of the structure */
	uint8_t version; /* version of this structure */
	uint16_t size; /* size of this structure in bytes */
	uint32_t attr; /* attributes: unused bits SBZ */
	} param_header_t;

	/*****************************************************************************
	* This structure represents the superset of information needed while
	* switching exception levels. The only two mechanisms to do so are
	* ERET & SMC. Security state is indicated using bit zero of header
	* attribute
	* NOTE: BL1 expects entrypoint followed by spsr while processing
	* SMC to jump to BL31 from the start of entry_point_info
	*****************************************************************************/
	typedef struct entry_point_info {
	param_header_t h;
	uintptr_t pc;
	uint32_t spsr;
	aapcs64_params_t args;
	} entry_point_info_t;

	/*****************************************************************************
	* Image info binary provides information from the image loader that
	* can be used by the firmware to manage available trusted RAM.
	* More advanced firmware image formats can provide additional
	* information that enables optimization or greater flexibility in the
	* common firmware code
	*****************************************************************************/
	typedef struct image_info {
	param_header_t h;
	uintptr_t image_base; /* physical address of base of image */
	uint32_t image_size; /* bytes read from image file */
	} image_info_t;

	/*******************************************************************************
	* This structure represents the superset of information that can be passed to
	* BL31 e.g. while passing control to it from BL2. The BL32 parameters will be
	* populated only if BL2 detects its presence. A pointer to a structure of this
	* type should be passed in X3 to BL31's cold boot entrypoint
	*
	* Use of this structure and the X3 parameter is not mandatory: the BL3-1
	* platform code can use other mechanisms to provide the necessary information
	* about BL3-2 and BL3-3 to the common and SPD code.
	*
	* BL3-1 image information is mandatory if this structure is used. If either of
	* the optional BL3-2 and BL3-3 image information is not provided, this is
	* indicated by the respective image_info pointers being zero.
	******************************************************************************/
	typedef struct bl31_params {
	param_header_t h;
	image_info_t *bl31_image_info;
	entry_point_info_t *bl32_ep_info;
	image_info_t *bl32_image_info;
	entry_point_info_t *bl33_ep_info;
	image_info_t *bl33_image_info;
	} bl31_params_t;


	/*
	* Compile time assertions related to the 'entry_point_info' structure to
	* ensure that the assembler and the compiler view of the offsets of
	* the structure members is the same.
	*/
	CASSERT(ENTRY_POINT_INFO_PC_OFFSET ==
	__builtin_offsetof(entry_point_info_t, pc), \
	assert_BL31_pc_offset_mismatch);

	CASSERT(ENTRY_POINT_INFO_ARGS_OFFSET == \
	__builtin_offsetof(entry_point_info_t, args), \
	assert_BL31_args_offset_mismatch);

	CASSERT(sizeof(unsigned long) ==
	__builtin_offsetof(entry_point_info_t, spsr) - \
	__builtin_offsetof(entry_point_info_t, pc), \
	assert_entrypoint_and_spsr_should_be_adjacent);

	/*******************************************************************************
	* Function & variable prototypes
	******************************************************************************/
	unsigned long page_align(unsigned long, unsigned);
	void change_security_state(unsigned int);
	unsigned long image_size(const char *);
	int load_image(meminfo_t *,
	const char *,
	unsigned int,
	unsigned long,
	image_info_t *,
	entry_point_info_t *);
	extern const char build_message[];

	#endif /__ASSEMBLY__/

	#endif /* __BL_COMMON_H__ */