220 lines
5.9 KiB
C
220 lines
5.9 KiB
C
/*
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* Copyright (c) 2013-2014, Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/*
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* DESCRIPTION
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* Platform independent, commonly used macros and defines related to linker
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* script.
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*
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* This file may be included by:
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* - Linker script files: for linker section declarations
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* - C files: for external declaration of address or size of linker section
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* - Assembly files: for external declaration of address or size of linker
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* section
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*/
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#ifndef _LINKERDEFS_H
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#define _LINKERDEFS_H
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#include <toolchain.h>
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#include <linker/sections.h>
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/* include platform dependent linker-defs */
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#ifdef CONFIG_X86
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/* Nothing yet to include */
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#elif defined(CONFIG_ARM)
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/* Nothing yet to include */
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#elif defined(CONFIG_ARC)
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/* Nothing yet to include */
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#elif defined(CONFIG_NIOS2)
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/* Nothing yet to include */
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#elif defined(CONFIG_RISCV32)
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/* Nothing yet to include */
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#elif defined(CONFIG_XTENSA)
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/* Nothing yet to include */
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#else
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#error Arch not supported.
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#endif
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#ifdef _LINKER
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/*
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* Space for storing per device busy bitmap. Since we do not know beforehand
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* the number of devices, we go through the below mechanism to allocate the
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* required space.
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*/
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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#define DEVICE_COUNT \
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((__device_init_end - __device_init_start) / _DEVICE_STRUCT_SIZE)
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#define DEV_BUSY_SZ (((DEVICE_COUNT + 31) / 32) * 4)
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#define DEVICE_BUSY_BITFIELD() \
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FILL(0x00) ; \
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__device_busy_start = .; \
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. = . + DEV_BUSY_SZ; \
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__device_busy_end = .;
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#else
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#define DEVICE_BUSY_BITFIELD()
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#endif
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/*
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* generate a symbol to mark the start of the device initialization objects for
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* the specified level, then link all of those objects (sorted by priority);
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* ensure the objects aren't discarded if there is no direct reference to them
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*/
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#define DEVICE_INIT_LEVEL(level) \
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__device_##level##_start = .; \
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KEEP(*(SORT(.init_##level[0-9]))); \
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KEEP(*(SORT(.init_##level[1-9][0-9]))); \
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/*
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* link in device initialization objects for all devices that are automatically
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* initialized by the kernel; the objects are sorted in the order they will be
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* initialized (i.e. ordered by level, sorted by priority within a level)
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*/
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#define DEVICE_INIT_SECTIONS() \
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__device_init_start = .; \
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DEVICE_INIT_LEVEL(PRE_KERNEL_1) \
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DEVICE_INIT_LEVEL(PRE_KERNEL_2) \
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DEVICE_INIT_LEVEL(POST_KERNEL) \
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DEVICE_INIT_LEVEL(APPLICATION) \
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__device_init_end = .; \
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DEVICE_BUSY_BITFIELD() \
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/* define a section for undefined device initialization levels */
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#define DEVICE_INIT_UNDEFINED_SECTION() \
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KEEP(*(SORT(.init_[_A-Z0-9]*))) \
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/*
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* link in shell initialization objects for all modules that use shell and
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* their shell commands are automatically initialized by the kernel.
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*/
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#define SHELL_INIT_SECTIONS() \
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__shell_cmd_start = .; \
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KEEP(*(".shell_*")); \
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__shell_cmd_end = .;
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#ifdef CONFIG_APPLICATION_MEMORY
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#define KERNEL_INPUT_SECTION(sect) libzephyr.a (sect) kernel/lib.a (sect)
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#define APP_INPUT_SECTION(sect) \
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*(EXCLUDE_FILE (*libzephyr.a *kernel/lib.a) sect)
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#else
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#define KERNEL_INPUT_SECTION(sect) *(sect)
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#define APP_INPUT_SECTION(sect) *(sect)
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#endif
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#ifdef CONFIG_X86 /* LINKER FILES: defines used by linker script */
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/* Should be moved to linker-common-defs.h */
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#if defined(CONFIG_XIP)
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#define ROMABLE_REGION ROM
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#else
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#define ROMABLE_REGION RAM
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#endif
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#endif
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/*
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* If image is loaded via kexec Linux system call, then program
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* headers need to be page aligned.
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* This can be done by section page aligning.
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*/
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#ifdef CONFIG_BOOTLOADER_KEXEC
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#define KEXEC_PGALIGN_PAD(x) . = ALIGN(x);
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#else
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#define KEXEC_PGALIGN_PAD(x)
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#endif
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#elif defined(_ASMLANGUAGE)
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/* Assembly FILES: declaration defined by the linker script */
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GDATA(__bss_start)
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GDATA(__bss_num_words)
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#ifdef CONFIG_XIP
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GDATA(__data_rom_start)
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GDATA(__data_ram_start)
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GDATA(__data_num_words)
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#endif
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#else /* ! _ASMLANGUAGE */
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#include <zephyr/types.h>
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#ifdef CONFIG_APPLICATION_MEMORY
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/* Memory owned by the application. Start and end will be aligned for memory
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* management/protection hardware for the target architecture.
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* The policy for this memory will be to configure all of it as user thread
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* accessible. It consists of all non-kernel globals.
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*/
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extern char __app_ram_start[];
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extern char __app_ram_end[];
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extern char __app_ram_size[];
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#endif
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/* Memory owned by the kernel. Start and end will be aligned for memory
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* management/protection hardware for the target architecture..
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*
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* Consists of all kernel-side globals, all kernel objects, all thread stacks,
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* and all currently unused RAM. If CONFIG_APPLICATION_MEMORY is not enabled,
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* has all globals, not just kernel side.
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*
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* Except for the stack of the currently executing thread, none of this memory
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* is normally accessible to user threads unless specifically granted at
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* runtime.
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*/
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extern char __kernel_ram_start[];
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extern char __kernel_ram_end[];
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extern char __kernel_ram_size[];
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/* Used by _bss_zero or arch-specific implementation */
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extern char __bss_start[];
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extern char __bss_end[];
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#ifdef CONFIG_APPLICATION_MEMORY
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extern char __app_bss_start[];
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extern char __app_bss_end[];
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#endif
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/* Used by _data_copy() or arch-specific implementation */
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#ifdef CONFIG_XIP
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extern char __data_rom_start[];
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extern char __data_ram_start[];
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extern char __data_ram_end[];
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#ifdef CONFIG_APPLICATION_MEMORY
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extern char __app_data_rom_start[];
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extern char __app_data_ram_start[];
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extern char __app_data_ram_end[];
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#endif /* CONFIG_APPLICATION_MEMORY */
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#endif /* CONFIG_XIP */
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/* Includes text and rodata */
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extern char _image_rom_start[];
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extern char _image_rom_end[];
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extern char _image_rom_size[];
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/* datas, bss, noinit */
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extern char _image_ram_start[];
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extern char _image_ram_end[];
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extern char _image_text_start[];
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extern char _image_text_end[];
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extern char _image_rodata_start[];
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extern char _image_rodata_end[];
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extern char _vector_start[];
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extern char _vector_end[];
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/* end address of image, used by newlib for the heap */
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extern char _end[];
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#endif /* ! _ASMLANGUAGE */
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#endif /* _LINKERDEFS_H */
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