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/*
* 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 sec_state_is_valid(s) (((s) == SECURE) || ((s) == NON_SECURE))
#define UP 1
#define DOWN 0
/*******************************************************************************
* Constants to identify the location of a memory region in a given memory
* layout.
******************************************************************************/
#define TOP 0x1
#define BOTTOM !TOP
/******************************************************************************
* 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 PARAM_EP_SECURITY_MASK 0x1
#define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK)
#define SET_SECURITY_STATE(x, security) \
((x) = ((x) & ~PARAM_EP_SECURITY_MASK) | (security))
#define EP_EE_MASK 0x2
#define EP_EE_LITTLE 0x0
#define EP_EE_BIG 0x2
#define EP_GET_EE(x) (x & EP_EE_MASK)
#define EP_SET_EE(x, ee) ((x) = ((x) & ~EP_EE_MASK) | (ee))
#define EP_ST_MASK 0x4
#define EP_ST_DISABLE 0x0
#define EP_ST_ENABLE 0x4
#define EP_GET_ST(x) (x & EP_ST_MASK)
#define EP_SET_ST(x, ee) ((x) = ((x) & ~EP_ST_MASK) | (ee))
#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)
/*******************************************************************************
* Constant that indicates if this is the first version of the reset handler
* contained in an image. This will be the case when the image is BL1 or when
* its BL3-1 and RESET_TO_BL31 is true. This constant enables a subsequent
* version of the reset handler to perform actions that override the ones
* performed in the first version of the code. This will be required when the
* first version exists in an un-modifiable image e.g. a BootROM image.
******************************************************************************/
#if IMAGE_BL1 || (IMAGE_BL31 && RESET_TO_BL31)
#define FIRST_RESET_HANDLER_CALL
#endif
#ifndef __ASSEMBLY__
#include <cdefs.h> /* For __dead2 */
#include <cassert.h>
#include <stdint.h>
#include <stddef.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 {
uint64_t total_base;
size_t total_size;
uint64_t free_base;
size_t free_size;
} 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 *mem_layout,
const char *image_name,
uint64_t image_base,
image_info_t *image_data,
entry_point_info_t *entry_point_info);
extern const char build_message[];
extern const char version_string[];
void reserve_mem(uint64_t *free_base, size_t *free_size,
uint64_t addr, size_t size);
#endif /*__ASSEMBLY__*/
#endif /* __BL_COMMON_H__ */