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/*
* Copyright (c) 2013-2014, Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* DESCRIPTION
* Platform independent, commonly used macros and defines related to linker
* script.
*
* This file may be included by:
* - Linker script files: for linker section declarations
* - C files: for external declaration of address or size of linker section
* - Assembly files: for external declaration of address or size of linker
* section
*/
#ifndef _LINKERDEFS_H
#define _LINKERDEFS_H
#include <toolchain.h>
#include <sections.h>
/* include platform dependent linker-defs */
#ifdef CONFIG_X86
/* Nothing yet to include */
#elif defined(CONFIG_ARM)
/* Nothing yet to include */
#elif defined(CONFIG_ARC)
/* Nothing yet to include */
#elif defined(CONFIG_NIOS2)
/* Nothing yet to include */
#elif defined(CONFIG_RISCV32)
/* Nothing yet to include */
#else
#error Arch not supported.
#endif
#ifdef _LINKER
/*
* Space for storing per device busy bitmap. Since we do not know beforehand
* the number of devices, we go through the below mechanism to allocate the
* required space.
*/
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
#define DEVICE_COUNT \
((__device_init_end - __device_init_start) / _DEVICE_STRUCT_SIZE)
#define DEV_BUSY_SZ (((DEVICE_COUNT + 31) / 32) * 4)
#define DEVICE_BUSY_BITFIELD() \
FILL(0x00) ; \
__device_busy_start = .; \
. = . + DEV_BUSY_SZ; \
__device_busy_end = .;
#else
#define DEVICE_BUSY_BITFIELD()
#endif
/*
* generate a symbol to mark the start of the device initialization objects for
* the specified level, then link all of those objects (sorted by priority);
* ensure the objects aren't discarded if there is no direct reference to them
*/
#define DEVICE_INIT_LEVEL(level) \
__device_##level##_start = .; \
KEEP(*(SORT(.init_##level[0-9]))); \
KEEP(*(SORT(.init_##level[1-9][0-9]))); \
/*
* link in device initialization objects for all devices that are automatically
* initialized by the kernel; the objects are sorted in the order they will be
* initialized (i.e. ordered by level, sorted by priority within a level)
*/
#define DEVICE_INIT_SECTIONS() \
__device_init_start = .; \
DEVICE_INIT_LEVEL(PRE_KERNEL_1) \
DEVICE_INIT_LEVEL(PRE_KERNEL_2) \
DEVICE_INIT_LEVEL(POST_KERNEL) \
DEVICE_INIT_LEVEL(APPLICATION) \
DEVICE_INIT_LEVEL(PRIMARY) \
DEVICE_INIT_LEVEL(SECONDARY) \
DEVICE_INIT_LEVEL(NANOKERNEL) \
DEVICE_INIT_LEVEL(MICROKERNEL) \
__device_init_end = .; \
DEVICE_BUSY_BITFIELD() \
/* define a section for undefined device initialization levels */
#define DEVICE_INIT_UNDEFINED_SECTION() \
KEEP(*(SORT(.init_[_A-Z0-9]*))) \
/*
* link in shell initialization objects for all modules that use shell and
* their shell commands are automatically initialized by the kernel.
*/
#define SHELL_INIT_SECTIONS() \
__shell_cmd_start = .; \
KEEP(*(".shell_*")); \
__shell_cmd_end = .;
#ifdef CONFIG_X86 /* LINKER FILES: defines used by linker script */
/* Should be moved to linker-common-defs.h */
#if defined(CONFIG_XIP)
#define ROMABLE_REGION ROM
#else
#define ROMABLE_REGION RAM
#endif
#endif
/*
* If image is loaded via kexec Linux system call, then program
* headers need to be page aligned.
* This can be done by section page aligning.
*/
#ifdef CONFIG_BOOTLOADER_KEXEC
#define KEXEC_PGALIGN_PAD(x) . = ALIGN(x);
#else
#define KEXEC_PGALIGN_PAD(x)
#endif
#elif defined(_ASMLANGUAGE)
/* Assembly FILES: declaration defined by the linker script */
GDATA(__bss_start)
GDATA(__bss_num_words)
#ifdef CONFIG_XIP
GDATA(__data_rom_start)
GDATA(__data_ram_start)
GDATA(__data_num_words)
#endif
#else /* ! _ASMLANGUAGE */
#include <stdint.h>
extern char __bss_start[];
extern char __bss_end[];
#ifdef CONFIG_XIP
extern char __data_rom_start[];
extern char __data_ram_start[];
extern char __data_ram_end[];
#endif
extern char _image_rom_start[];
extern char _image_rom_end[];
extern char _image_ram_start[];
extern char _image_ram_end[];
extern char _image_text_start[];
extern char _image_text_end[];
/* end address of image. */
extern char _end[];
#endif /* ! _ASMLANGUAGE */
#endif /* _LINKERDEFS_H */
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