bl_common.h

/*
 * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef BL_COMMON_H
#define BL_COMMON_H

#include <common/ep_info.h>
#include <common/param_header.h>
#include <lib/utils_def.h>

#ifndef __ASSEMBLER__
#include <stddef.h>
#include <stdint.h>
#include <lib/cassert.h>
#endif /* __ASSEMBLER__ */

#include <export/common/bl_common_exp.h>

#define UP	U(1)
#define DOWN	U(0)

/*******************************************************************************
 * Constants to identify the location of a memory region in a given memory
 * layout.
******************************************************************************/
#define TOP	U(0x1)
#define BOTTOM	U(0x0)

/*******************************************************************************
 * Constants to indicate type of exception to the common exception handler.
 ******************************************************************************/
#define SYNC_EXCEPTION_SP_EL0		U(0x0)
#define IRQ_SP_EL0			U(0x1)
#define FIQ_SP_EL0			U(0x2)
#define SERROR_SP_EL0			U(0x3)
#define SYNC_EXCEPTION_SP_ELX		U(0x4)
#define IRQ_SP_ELX			U(0x5)
#define FIQ_SP_ELX			U(0x6)
#define SERROR_SP_ELX			U(0x7)
#define SYNC_EXCEPTION_AARCH64		U(0x8)
#define IRQ_AARCH64			U(0x9)
#define FIQ_AARCH64			U(0xa)
#define SERROR_AARCH64			U(0xb)
#define SYNC_EXCEPTION_AARCH32		U(0xc)
#define IRQ_AARCH32			U(0xd)
#define FIQ_AARCH32			U(0xe)
#define SERROR_AARCH32			U(0xf)

/*
 * Mapping to connect linker symbols from .ld.S with their counterparts
 * from .scat for the BL31 image
 */
#if defined(USE_ARM_LINK)
#define __BL31_END__			Load$$LR$$LR_END$$Base
#define __BSS_START__			Load$$LR$$LR_BSS$$Base
#define __BSS_END__			Load$$LR$$LR_BSS$$Limit
#define __BSS_SIZE__			Load$$LR$$LR_BSS$$Length
#define __COHERENT_RAM_START__		Load$$LR$$LR_COHERENT_RAM$$Base
#define __COHERENT_RAM_END_UNALIGNED__	Load$$__COHERENT_RAM_EPILOGUE_UNALIGNED__$$Base
#define __COHERENT_RAM_END__		Load$$LR$$LR_COHERENT_RAM$$Limit
#define __COHERENT_RAM_UNALIGNED_SIZE__	Load$$__COHERENT_RAM__$$Length
#define __CPU_OPS_START__		Load$$__CPU_OPS__$$Base
#define __CPU_OPS_END__			Load$$__CPU_OPS__$$Limit
#define __DATA_START__			Load$$__DATA__$$Base
#define __DATA_END__			Load$$__DATA__$$Limit
#define __GOT_START__			Load$$__GOT__$$Base
#define __GOT_END__			Load$$__GOT__$$Limit
#define __PERCPU_BAKERY_LOCK_START__	Load$$__BAKERY_LOCKS__$$Base
#define __PERCPU_BAKERY_LOCK_END__	Load$$__BAKERY_LOCKS_EPILOGUE__$$Base
#define __PMF_SVC_DESCS_START__		Load$$__PMF_SVC_DESCS__$$Base
#define __PMF_SVC_DESCS_END__		Load$$__PMF_SVC_DESCS__$$Limit
#define __PMF_TIMESTAMP_START__		Load$$__PMF_TIMESTAMP__$$Base
#define __PMF_TIMESTAMP_END__		Load$$__PER_CPU_TIMESTAMPS__$$Limit
#define __PMF_PERCPU_TIMESTAMP_END__	Load$$__PMF_TIMESTAMP_EPILOGUE__$$Base
#define __RELA_END__			Load$$__RELA__$$Limit
#define __RELA_START__			Load$$__RELA__$$Base
#define __RODATA_START__		Load$$__RODATA__$$Base
#define __RODATA_END__			Load$$__RODATA_EPILOGUE__$$Base
#define __RT_SVC_DESCS_START__		Load$$__RT_SVC_DESCS__$$Base
#define __RT_SVC_DESCS_END__		Load$$__RT_SVC_DESCS__$$Limit
#define __RW_START__			Load$$LR$$LR_RW_DATA$$Base
#define __RW_END__			Load$$LR$$LR_END$$Base
#define __SPM_SHIM_EXCEPTIONS_START__	Load$$__SPM_SHIM_EXCEPTIONS__$$Base
#define __SPM_SHIM_EXCEPTIONS_END__	Load$$__SPM_SHIM_EXCEPTIONS_EPILOGUE__$$Base
#define __STACKS_START__		Load$$__STACKS__$$Base
#define __STACKS_END__			Load$$__STACKS__$$Limit
#define __TEXT_START__			Load$$__TEXT__$$Base
#define __TEXT_END__			Load$$__TEXT_EPILOGUE__$$Base
#endif /* USE_ARM_LINK */

#ifndef __ASSEMBLER__

/*
 * Declarations of linker defined symbols to help determine memory layout of
 * BL images
 */
#if SEPARATE_CODE_AND_RODATA
IMPORT_SYM(uintptr_t, __TEXT_START__,		BL_CODE_BASE);
IMPORT_SYM(uintptr_t, __TEXT_END__,		BL_CODE_END);
IMPORT_SYM(uintptr_t, __RODATA_START__,		BL_RO_DATA_BASE);
IMPORT_SYM(uintptr_t, __RODATA_END__,		BL_RO_DATA_END);
#else
IMPORT_SYM(uintptr_t, __RO_START__,		BL_CODE_BASE);
IMPORT_SYM(uintptr_t, __RO_END__,		BL_CODE_END);
#endif
IMPORT_SYM(uintptr_t, __RW_END__,		BL_END);

#if defined(IMAGE_BL1)
IMPORT_SYM(uintptr_t, __BL1_ROM_END__,		BL1_ROM_END);

IMPORT_SYM(uintptr_t, __BL1_RAM_START__,	BL1_RAM_BASE);
IMPORT_SYM(uintptr_t, __BL1_RAM_END__,		BL1_RAM_LIMIT);
#elif defined(IMAGE_BL2)
IMPORT_SYM(uintptr_t, __BL2_END__,		BL2_END);
#elif defined(IMAGE_BL2U)
IMPORT_SYM(uintptr_t, __BL2U_END__,		BL2U_END);
#elif defined(IMAGE_BL31)
IMPORT_SYM(uintptr_t, __BL31_START__,		BL31_START);
IMPORT_SYM(uintptr_t, __BL31_END__,		BL31_END);
#elif defined(IMAGE_BL32)
IMPORT_SYM(uintptr_t, __BL32_END__,		BL32_END);
#endif /* IMAGE_BLX */

/* The following symbols are only exported from the BL2 at EL3 linker script. */
#if BL2_IN_XIP_MEM && defined(IMAGE_BL2)
IMPORT_SYM(uintptr_t, __BL2_ROM_END__,		BL2_ROM_END);

IMPORT_SYM(uintptr_t, __BL2_RAM_START__,	BL2_RAM_BASE);
IMPORT_SYM(uintptr_t, __BL2_RAM_END__,		BL2_RAM_END);
#endif /* BL2_IN_XIP_MEM */

/*
 * The next 2 constants identify the extents of the coherent memory region.
 * These addresses are used by the MMU setup code and therefore they must be
 * page-aligned.  It is the responsibility of the linker script to ensure that
 * __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols refer to
 * page-aligned addresses.
 */
#if USE_COHERENT_MEM
IMPORT_SYM(uintptr_t, __COHERENT_RAM_START__,	BL_COHERENT_RAM_BASE);
IMPORT_SYM(uintptr_t, __COHERENT_RAM_END__,	BL_COHERENT_RAM_END);
#endif

/*******************************************************************************
 * 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 {
	uintptr_t total_base;
	size_t total_size;
} meminfo_t;

/*******************************************************************************
 * Function & variable prototypes
 ******************************************************************************/
int load_auth_image(unsigned int image_id, image_info_t *image_data);

#if TRUSTED_BOARD_BOOT && defined(DYN_DISABLE_AUTH)
/*
 * API to dynamically disable authentication. Only meant for development
 * systems.
 */
void dyn_disable_auth(void);
#endif

extern const char build_message[];
extern const char version_string[];

void print_entry_point_info(const entry_point_info_t *ep_info);
uintptr_t page_align(uintptr_t value, unsigned dir);

struct mmap_region;

void setup_page_tables(const struct mmap_region *bl_regions,
			   const struct mmap_region *plat_regions);

void bl_handle_pauth(void);

#endif /*__ASSEMBLER__*/

#endif /* BL_COMMON_H */