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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | /* * 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 */ #elif defined(CONFIG_XTENSA) /* 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 */ |