1/* 2 * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <platform_def.h> 8 9#include <lib/xlat_tables/xlat_tables_defs.h> 10 11OUTPUT_FORMAT(PLATFORM_LINKER_FORMAT) 12OUTPUT_ARCH(PLATFORM_LINKER_ARCH) 13ENTRY(bl2_entrypoint) 14 15MEMORY { 16 RAM (rwx): ORIGIN = BL2_BASE, LENGTH = BL2_LIMIT - BL2_BASE 17} 18 19 20SECTIONS 21{ 22 . = BL2_BASE; 23 ASSERT(. == ALIGN(PAGE_SIZE), 24 "BL2_BASE address is not aligned on a page boundary.") 25 26#if SEPARATE_CODE_AND_RODATA 27 .text . : { 28 __TEXT_START__ = .; 29 *bl2_entrypoint.o(.text*) 30 *(SORT_BY_ALIGNMENT(.text*)) 31 *(.vectors) 32 . = ALIGN(PAGE_SIZE); 33 __TEXT_END__ = .; 34 } >RAM 35 36 /* .ARM.extab and .ARM.exidx are only added because Clang need them */ 37 .ARM.extab . : { 38 *(.ARM.extab* .gnu.linkonce.armextab.*) 39 } >RAM 40 41 .ARM.exidx . : { 42 *(.ARM.exidx* .gnu.linkonce.armexidx.*) 43 } >RAM 44 45 .rodata . : { 46 __RODATA_START__ = .; 47 *(SORT_BY_ALIGNMENT(.rodata*)) 48 49 . = ALIGN(8); 50 __FCONF_POPULATOR_START__ = .; 51 KEEP(*(.fconf_populator)) 52 __FCONF_POPULATOR_END__ = .; 53 54 /* Ensure 8-byte alignment for descriptors and ensure inclusion */ 55 . = ALIGN(8); 56 __PARSER_LIB_DESCS_START__ = .; 57 KEEP(*(.img_parser_lib_descs)) 58 __PARSER_LIB_DESCS_END__ = .; 59 60 . = ALIGN(PAGE_SIZE); 61 __RODATA_END__ = .; 62 } >RAM 63#else 64 ro . : { 65 __RO_START__ = .; 66 *bl2_entrypoint.o(.text*) 67 *(SORT_BY_ALIGNMENT(.text*)) 68 *(SORT_BY_ALIGNMENT(.rodata*)) 69 70 . = ALIGN(8); 71 __FCONF_POPULATOR_START__ = .; 72 KEEP(*(.fconf_populator)) 73 __FCONF_POPULATOR_END__ = .; 74 75 /* Ensure 8-byte alignment for descriptors and ensure inclusion */ 76 . = ALIGN(8); 77 __PARSER_LIB_DESCS_START__ = .; 78 KEEP(*(.img_parser_lib_descs)) 79 __PARSER_LIB_DESCS_END__ = .; 80 81 *(.vectors) 82 __RO_END_UNALIGNED__ = .; 83 /* 84 * Memory page(s) mapped to this section will be marked as 85 * read-only, executable. No RW data from the next section must 86 * creep in. Ensure the rest of the current memory page is unused. 87 */ 88 . = ALIGN(PAGE_SIZE); 89 __RO_END__ = .; 90 } >RAM 91#endif 92 93 /* 94 * Define a linker symbol to mark start of the RW memory area for this 95 * image. 96 */ 97 __RW_START__ = . ; 98 99 /* 100 * .data must be placed at a lower address than the stacks if the stack 101 * protector is enabled. Alternatively, the .data.stack_protector_canary 102 * section can be placed independently of the main .data section. 103 */ 104 .data . : { 105 __DATA_START__ = .; 106 *(SORT_BY_ALIGNMENT(.data*)) 107 __DATA_END__ = .; 108 } >RAM 109 110 stacks (NOLOAD) : { 111 __STACKS_START__ = .; 112 *(tzfw_normal_stacks) 113 __STACKS_END__ = .; 114 } >RAM 115 116 /* 117 * The .bss section gets initialised to 0 at runtime. 118 * Its base address should be 16-byte aligned for better performance of the 119 * zero-initialization code. 120 */ 121 .bss : ALIGN(16) { 122 __BSS_START__ = .; 123 *(SORT_BY_ALIGNMENT(.bss*)) 124 *(COMMON) 125 __BSS_END__ = .; 126 } >RAM 127 128 /* 129 * The xlat_table section is for full, aligned page tables (4K). 130 * Removing them from .bss avoids forcing 4K alignment on 131 * the .bss section. The tables are initialized to zero by the translation 132 * tables library. 133 */ 134 xlat_table (NOLOAD) : { 135 *(xlat_table) 136 } >RAM 137 138#if USE_COHERENT_MEM 139 /* 140 * The base address of the coherent memory section must be page-aligned (4K) 141 * to guarantee that the coherent data are stored on their own pages and 142 * are not mixed with normal data. This is required to set up the correct 143 * memory attributes for the coherent data page tables. 144 */ 145 coherent_ram (NOLOAD) : ALIGN(PAGE_SIZE) { 146 __COHERENT_RAM_START__ = .; 147 *(tzfw_coherent_mem) 148 __COHERENT_RAM_END_UNALIGNED__ = .; 149 /* 150 * Memory page(s) mapped to this section will be marked 151 * as device memory. No other unexpected data must creep in. 152 * Ensure the rest of the current memory page is unused. 153 */ 154 . = ALIGN(PAGE_SIZE); 155 __COHERENT_RAM_END__ = .; 156 } >RAM 157#endif 158 159 /* 160 * Define a linker symbol to mark end of the RW memory area for this 161 * image. 162 */ 163 __RW_END__ = .; 164 __BL2_END__ = .; 165 166 __BSS_SIZE__ = SIZEOF(.bss); 167 168#if USE_COHERENT_MEM 169 __COHERENT_RAM_UNALIGNED_SIZE__ = 170 __COHERENT_RAM_END_UNALIGNED__ - __COHERENT_RAM_START__; 171#endif 172 173 ASSERT(. <= BL2_LIMIT, "BL2 image has exceeded its limit.") 174} 175