395 lines
13 KiB
C
395 lines
13 KiB
C
/*
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* Copyright (c) 2013-2016, 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 sec_state_is_valid(s) (((s) == SECURE) || ((s) == NON_SECURE))
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#define UP 1
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#define DOWN 0
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/*******************************************************************************
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* Constants to identify the location of a memory region in a given memory
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* layout.
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******************************************************************************/
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#define TOP 0x1
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#define BOTTOM !TOP
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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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#ifdef AARCH32
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#define ENTRY_POINT_INFO_ARGS_OFFSET 0x10
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#else
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#define ENTRY_POINT_INFO_ARGS_OFFSET 0x18
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#endif
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/* The following are used to set/get image attributes. */
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#define PARAM_EP_SECURITY_MASK (0x1)
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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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/*
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* The following are used for image state attributes.
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* Image can only be in one of the following state.
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*/
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#define IMAGE_STATE_RESET 0
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#define IMAGE_STATE_COPIED 1
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#define IMAGE_STATE_COPYING 2
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#define IMAGE_STATE_AUTHENTICATED 3
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#define IMAGE_STATE_EXECUTED 4
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#define IMAGE_STATE_INTERRUPTED 5
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#define EP_EE_MASK 0x2
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#define EP_EE_LITTLE 0x0
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#define EP_EE_BIG 0x2
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#define EP_GET_EE(x) (x & EP_EE_MASK)
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#define EP_SET_EE(x, ee) ((x) = ((x) & ~EP_EE_MASK) | (ee))
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#define EP_ST_MASK 0x4
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#define EP_ST_DISABLE 0x0
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#define EP_ST_ENABLE 0x4
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#define EP_GET_ST(x) (x & EP_ST_MASK)
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#define EP_SET_ST(x, ee) ((x) = ((x) & ~EP_ST_MASK) | (ee))
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#define EP_EXE_MASK 0x8
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#define NON_EXECUTABLE 0x0
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#define EXECUTABLE 0x8
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#define EP_GET_EXE(x) (x & EP_EXE_MASK)
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#define EP_SET_EXE(x, ee) ((x) = ((x) & ~EP_EXE_MASK) | (ee))
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#define EP_FIRST_EXE_MASK 0x10
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#define EP_FIRST_EXE 0x10
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#define EP_GET_FIRST_EXE(x) ((x) & EP_FIRST_EXE_MASK)
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#define EP_SET_FIRST_EXE(x, ee) ((x) = ((x) & ~EP_FIRST_EXE_MASK) | (ee))
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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 PARAM_BL_LOAD_INFO 0x04
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#define PARAM_BL_PARAMS 0x05
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#define PARAM_PSCI_LIB_ARGS 0x06
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#define IMAGE_ATTRIB_SKIP_LOADING 0x02
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#define IMAGE_ATTRIB_PLAT_SETUP 0x04
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#define VERSION_1 0x01
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#define VERSION_2 0x02
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#define INVALID_IMAGE_ID (0xFFFFFFFF)
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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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/* Following is used for populating structure members statically. */
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#define SET_STATIC_PARAM_HEAD(_p, _type, _ver, _p_type, _attr) \
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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_type), \
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._p.h.attr = (uint32_t)(_attr)
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/*******************************************************************************
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* Constants to indicate type of exception to the common exception handler.
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******************************************************************************/
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#define SYNC_EXCEPTION_SP_EL0 0x0
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#define IRQ_SP_EL0 0x1
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#define FIQ_SP_EL0 0x2
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#define SERROR_SP_EL0 0x3
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#define SYNC_EXCEPTION_SP_ELX 0x4
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#define IRQ_SP_ELX 0x5
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#define FIQ_SP_ELX 0x6
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#define SERROR_SP_ELX 0x7
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#define SYNC_EXCEPTION_AARCH64 0x8
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#define IRQ_AARCH64 0x9
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#define FIQ_AARCH64 0xa
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#define SERROR_AARCH64 0xb
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#define SYNC_EXCEPTION_AARCH32 0xc
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#define IRQ_AARCH32 0xd
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#define FIQ_AARCH32 0xe
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#define SERROR_AARCH32 0xf
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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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#include <stddef.h>
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#include <types.h>
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#include <utils.h> /* To retain compatibility */
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/*
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* Declarations of linker defined symbols to help determine memory layout of
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* BL images
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*/
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#if SEPARATE_CODE_AND_RODATA
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extern uintptr_t __TEXT_START__;
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extern uintptr_t __TEXT_END__;
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extern uintptr_t __RODATA_START__;
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extern uintptr_t __RODATA_END__;
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#else
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extern uintptr_t __RO_START__;
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extern uintptr_t __RO_END__;
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#endif
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#if IMAGE_BL2
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extern uintptr_t __BL2_END__;
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#elif IMAGE_BL2U
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extern uintptr_t __BL2U_END__;
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#elif IMAGE_BL31
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extern uintptr_t __BL31_END__;
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#elif IMAGE_BL32
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extern uintptr_t __BL32_END__;
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#endif /* IMAGE_BLX */
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#if USE_COHERENT_MEM
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extern uintptr_t __COHERENT_RAM_START__;
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extern uintptr_t __COHERENT_RAM_END__;
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#endif
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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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uintptr_t total_base;
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size_t total_size;
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#if !LOAD_IMAGE_V2
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uintptr_t free_base;
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size_t free_size;
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#endif
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} meminfo_t;
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typedef struct aapcs64_params {
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u_register_t arg0;
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u_register_t arg1;
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u_register_t arg2;
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u_register_t arg3;
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u_register_t arg4;
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u_register_t arg5;
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u_register_t arg6;
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u_register_t arg7;
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} aapcs64_params_t;
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typedef struct aapcs32_params {
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u_register_t arg0;
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u_register_t arg1;
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u_register_t arg2;
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u_register_t arg3;
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} aapcs32_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 at an offset from the start
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* of this structure defined by the macro `ENTRY_POINT_INFO_PC_OFFSET` while
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* processing SMC to jump to BL31.
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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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#ifdef AARCH32
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aapcs32_params_t args;
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#else
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aapcs64_params_t args;
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#endif
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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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#if LOAD_IMAGE_V2
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uint32_t image_max_size;
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#endif
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} image_info_t;
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/*****************************************************************************
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* The image descriptor struct definition.
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*****************************************************************************/
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typedef struct image_desc {
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/* Contains unique image id for the image. */
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unsigned int image_id;
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/*
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* This member contains Image state information.
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* Refer IMAGE_STATE_XXX defined above.
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*/
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unsigned int state;
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uint32_t copied_size; /* image size copied in blocks */
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image_info_t image_info;
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entry_point_info_t ep_info;
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} image_desc_t;
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#if LOAD_IMAGE_V2
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/* BL image node in the BL image loading sequence */
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typedef struct bl_load_info_node {
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unsigned int image_id;
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image_info_t *image_info;
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struct bl_load_info_node *next_load_info;
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} bl_load_info_node_t;
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/* BL image head node in the BL image loading sequence */
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typedef struct bl_load_info {
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param_header_t h;
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bl_load_info_node_t *head;
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} bl_load_info_t;
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/* BL image node in the BL image execution sequence */
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typedef struct bl_params_node {
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unsigned int image_id;
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image_info_t *image_info;
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entry_point_info_t *ep_info;
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struct bl_params_node *next_params_info;
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} bl_params_node_t;
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/*
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* BL image head node in the BL image execution sequence
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* It is also used to pass information to next BL image.
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*/
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typedef struct bl_params {
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param_header_t h;
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bl_params_node_t *head;
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} bl_params_t;
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#else /* LOAD_IMAGE_V2 */
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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 X0 to BL31's cold boot entrypoint.
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*
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* Use of this structure and the X0 parameter is not mandatory: the BL31
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* platform code can use other mechanisms to provide the necessary information
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* about BL32 and BL33 to the common and SPD code.
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*
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* BL31 image information is mandatory if this structure is used. If either of
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* the optional BL32 and BL33 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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#endif /* LOAD_IMAGE_V2 */
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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(uintptr_t) ==
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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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size_t image_size(unsigned int image_id);
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#if LOAD_IMAGE_V2
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int load_image(unsigned int image_id, image_info_t *image_data);
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int load_auth_image(unsigned int image_id, image_info_t *image_data);
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#else
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uintptr_t page_align(uintptr_t, unsigned);
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int load_image(meminfo_t *mem_layout,
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unsigned int image_id,
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uintptr_t image_base,
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image_info_t *image_data,
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entry_point_info_t *entry_point_info);
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int load_auth_image(meminfo_t *mem_layout,
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unsigned int image_id,
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uintptr_t image_base,
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image_info_t *image_data,
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entry_point_info_t *entry_point_info);
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void reserve_mem(uintptr_t *free_base, size_t *free_size,
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uintptr_t addr, size_t size);
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#endif /* LOAD_IMAGE_V2 */
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extern const char build_message[];
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extern const char version_string[];
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void print_entry_point_info(const entry_point_info_t *ep_info);
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#endif /*__ASSEMBLY__*/
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#endif /* __BL_COMMON_H__ */
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