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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 0
#define NON_SECURE 1
#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)
/*******************************************************************************
* Macro to flag a compile time assertion. It uses the preprocessor to generate
* an invalid C construct if 'cond' evaluates to false.
* The following compilation error is triggered if the assertion fails:
* "error: size of array 'msg' is negative"
******************************************************************************/
#define CASSERT(cond, msg) typedef char msg[(cond) ? 1 : -1]
/******************************************************************************
* 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
#ifndef __ASSEMBLY__
#include <stdio.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 {
unsigned long total_base;
long total_size;
unsigned long free_base;
long free_size;
unsigned long attr;
unsigned long next;
} meminfo;
typedef struct {
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;
/*******************************************************************************
* This structure represents the superset of information needed while switching
* exception levels. The only two mechanisms to do so are ERET & SMC. In case of
* SMC all members apart from 'aapcs64_params' will be ignored.
******************************************************************************/
typedef struct {
unsigned long entrypoint;
unsigned long spsr;
unsigned long security_state;
aapcs64_params args;
} el_change_info;
/*******************************************************************************
* 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.
******************************************************************************/
typedef struct {
meminfo bl31_meminfo;
el_change_info bl32_image_info;
meminfo bl32_meminfo;
el_change_info bl33_image_info;
meminfo bl33_meminfo;
} bl31_args;
/*******************************************************************************
* Function & variable prototypes
******************************************************************************/
extern unsigned long page_align(unsigned long, unsigned);
extern void change_security_state(unsigned int);
extern void __dead2 drop_el(aapcs64_params *, unsigned long, unsigned long);
extern void __dead2 raise_el(aapcs64_params *);
extern void __dead2 change_el(el_change_info *);
extern unsigned long make_spsr(unsigned long, unsigned long, unsigned long);
extern void init_bl2_mem_layout(meminfo *,
meminfo *,
unsigned int,
unsigned long) __attribute__((weak));
extern void init_bl31_mem_layout(const meminfo *,
meminfo *,
unsigned int) __attribute__((weak));
extern unsigned long image_size(const char *);
extern unsigned long load_image(meminfo *, const char *, unsigned int, unsigned long);
extern void __dead2 run_image(unsigned long entrypoint,
unsigned long spsr,
unsigned long security_state,
void *first_arg,
void *second_arg);
extern unsigned long *get_el_change_mem_ptr(void);
#endif /*__ASSEMBLY__*/
#endif /* __BL_COMMON_H__ */
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