219 lines
8.6 KiB
C
219 lines
8.6 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BL_COMMON_H__
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#define __BL_COMMON_H__
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#define SECURE 0x0
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#define NON_SECURE 0x1
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#define PARAM_EP_SECURITY_MASK 0x1
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#define UP 1
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#define DOWN 0
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/*******************************************************************************
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* Constants for loading images. When BLx wants to load BLy, it looks at a
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* meminfo structure to find the extents of free memory. Then depending upon
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* how it has been configured, it can either load BLy at the top or bottom of
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* the free memory. These constants indicate the choice.
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* TODO: Make this configurable while building the trusted firmware.
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******************************************************************************/
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#define TOP_LOAD 0x1
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#define BOT_LOAD !TOP_LOAD
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#define LOAD_MASK (1 << 0)
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/******************************************************************************
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* Opcode passed in x0 to tell next EL that we want to run an image.
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* Corresponds to the function ID of the only SMC that the BL1 exception
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* handlers service. That's why the chosen value is the first function ID of
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* the ARM SMC64 range.
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*****************************************************************************/
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#define RUN_IMAGE 0xC0000000
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/*******************************************************************************
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* Constants that allow assembler code to access members of and the
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* 'entry_point_info' structure at their correct offsets.
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******************************************************************************/
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#define ENTRY_POINT_INFO_PC_OFFSET 0x08
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#define ENTRY_POINT_INFO_ARGS_OFFSET 0x18
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#define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK)
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#define SET_SECURITY_STATE(x, security) \
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((x) = ((x) & ~PARAM_EP_SECURITY_MASK) | (security))
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#define PARAM_EP 0x01
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#define PARAM_IMAGE_BINARY 0x02
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#define PARAM_BL31 0x03
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#define VERSION_1 0x01
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#define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
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(_p)->h.type = (uint8_t)(_type); \
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(_p)->h.version = (uint8_t)(_ver); \
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(_p)->h.size = (uint16_t)sizeof(*_p); \
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(_p)->h.attr = (uint32_t)(_attr) ; \
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} while (0)
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#ifndef __ASSEMBLY__
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#include <cdefs.h> /* For __dead2 */
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#include <cassert.h>
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#include <stdint.h>
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/*******************************************************************************
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* Structure used for telling the next BL how much of a particular type of
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* memory is available for its use and how much is already used.
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******************************************************************************/
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typedef struct meminfo {
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unsigned long total_base;
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long total_size;
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unsigned long free_base;
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long free_size;
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unsigned long attr;
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unsigned long next;
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} meminfo_t;
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typedef struct aapcs64_params {
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unsigned long arg0;
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unsigned long arg1;
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unsigned long arg2;
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unsigned long arg3;
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unsigned long arg4;
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unsigned long arg5;
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unsigned long arg6;
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unsigned long arg7;
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} aapcs64_params_t;
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/***************************************************************************
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* This structure provides version information and the size of the
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* structure, attributes for the structure it represents
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***************************************************************************/
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typedef struct param_header {
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uint8_t type; /* type of the structure */
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uint8_t version; /* version of this structure */
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uint16_t size; /* size of this structure in bytes */
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uint32_t attr; /* attributes: unused bits SBZ */
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} param_header_t;
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/*****************************************************************************
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* This structure represents the superset of information needed while
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* switching exception levels. The only two mechanisms to do so are
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* ERET & SMC. Security state is indicated using bit zero of header
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* attribute
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* NOTE: BL1 expects entrypoint followed by spsr while processing
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* SMC to jump to BL31 from the start of entry_point_info
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*****************************************************************************/
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typedef struct entry_point_info {
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param_header_t h;
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uintptr_t pc;
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uint32_t spsr;
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aapcs64_params_t args;
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} entry_point_info_t;
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/*****************************************************************************
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* Image info binary provides information from the image loader that
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* can be used by the firmware to manage available trusted RAM.
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* More advanced firmware image formats can provide additional
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* information that enables optimization or greater flexibility in the
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* common firmware code
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*****************************************************************************/
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typedef struct image_info {
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param_header_t h;
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uintptr_t image_base; /* physical address of base of image */
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uint32_t image_size; /* bytes read from image file */
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} image_info_t;
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/*******************************************************************************
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* This structure represents the superset of information that can be passed to
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* BL31 e.g. while passing control to it from BL2. The BL32 parameters will be
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* populated only if BL2 detects its presence. A pointer to a structure of this
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* type should be passed in X3 to BL31's cold boot entrypoint
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*
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* Use of this structure and the X3 parameter is not mandatory: the BL3-1
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* platform code can use other mechanisms to provide the necessary information
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* about BL3-2 and BL3-3 to the common and SPD code.
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*
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* BL3-1 image information is mandatory if this structure is used. If either of
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* the optional BL3-2 and BL3-3 image information is not provided, this is
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* indicated by the respective image_info pointers being zero.
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******************************************************************************/
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typedef struct bl31_params {
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param_header_t h;
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image_info_t *bl31_image_info;
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entry_point_info_t *bl32_ep_info;
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image_info_t *bl32_image_info;
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entry_point_info_t *bl33_ep_info;
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image_info_t *bl33_image_info;
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} bl31_params_t;
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/*
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* Compile time assertions related to the 'entry_point_info' structure to
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* ensure that the assembler and the compiler view of the offsets of
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* the structure members is the same.
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*/
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CASSERT(ENTRY_POINT_INFO_PC_OFFSET ==
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__builtin_offsetof(entry_point_info_t, pc), \
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assert_BL31_pc_offset_mismatch);
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CASSERT(ENTRY_POINT_INFO_ARGS_OFFSET == \
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__builtin_offsetof(entry_point_info_t, args), \
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assert_BL31_args_offset_mismatch);
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CASSERT(sizeof(unsigned long) ==
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__builtin_offsetof(entry_point_info_t, spsr) - \
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__builtin_offsetof(entry_point_info_t, pc), \
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assert_entrypoint_and_spsr_should_be_adjacent);
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/*******************************************************************************
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* Function & variable prototypes
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******************************************************************************/
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unsigned long page_align(unsigned long, unsigned);
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void change_security_state(unsigned int);
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void init_bl2_mem_layout(meminfo_t *,
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meminfo_t *,
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unsigned int,
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unsigned long) __attribute__((weak));
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void init_bl31_mem_layout(const meminfo_t *,
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meminfo_t *,
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unsigned int) __attribute__((weak));
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unsigned long image_size(const char *);
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int load_image(meminfo_t *,
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const char *,
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unsigned int,
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unsigned long,
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image_info_t *,
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entry_point_info_t *);
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unsigned long *get_el_change_mem_ptr(void);
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extern const char build_message[];
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#endif /*__ASSEMBLY__*/
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#endif /* __BL_COMMON_H__ */
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