1/* 2 * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <platform_def.h> 32 33OUTPUT_FORMAT(PLATFORM_LINKER_FORMAT) 34OUTPUT_ARCH(PLATFORM_LINKER_ARCH) 35ENTRY(bl2_entrypoint) 36 37MEMORY { 38 RAM (rwx): ORIGIN = BL2_BASE, LENGTH = BL2_LIMIT - BL2_BASE 39} 40 41 42SECTIONS 43{ 44 . = BL2_BASE; 45 ASSERT(. == ALIGN(4096), 46 "BL2_BASE address is not aligned on a page boundary.") 47 48#if SEPARATE_CODE_AND_RODATA 49 .text . : { 50 __TEXT_START__ = .; 51 *bl2_entrypoint.o(.text*) 52 *(.text*) 53 *(.vectors) 54 . = NEXT(4096); 55 __TEXT_END__ = .; 56 } >RAM 57 58 .rodata . : { 59 __RODATA_START__ = .; 60 *(.rodata*) 61 62 /* Ensure 8-byte alignment for descriptors and ensure inclusion */ 63 . = ALIGN(8); 64 __PARSER_LIB_DESCS_START__ = .; 65 KEEP(*(.img_parser_lib_descs)) 66 __PARSER_LIB_DESCS_END__ = .; 67 68 . = NEXT(4096); 69 __RODATA_END__ = .; 70 } >RAM 71#else 72 ro . : { 73 __RO_START__ = .; 74 *bl2_entrypoint.o(.text*) 75 *(.text*) 76 *(.rodata*) 77 78 /* Ensure 8-byte alignment for descriptors and ensure inclusion */ 79 . = ALIGN(8); 80 __PARSER_LIB_DESCS_START__ = .; 81 KEEP(*(.img_parser_lib_descs)) 82 __PARSER_LIB_DESCS_END__ = .; 83 84 *(.vectors) 85 __RO_END_UNALIGNED__ = .; 86 /* 87 * Memory page(s) mapped to this section will be marked as 88 * read-only, executable. No RW data from the next section must 89 * creep in. Ensure the rest of the current memory page is unused. 90 */ 91 . = NEXT(4096); 92 __RO_END__ = .; 93 } >RAM 94#endif 95 96 /* 97 * Define a linker symbol to mark start of the RW memory area for this 98 * image. 99 */ 100 __RW_START__ = . ; 101 102 /* 103 * .data must be placed at a lower address than the stacks if the stack 104 * protector is enabled. Alternatively, the .data.stack_protector_canary 105 * section can be placed independently of the main .data section. 106 */ 107 .data . : { 108 __DATA_START__ = .; 109 *(.data*) 110 __DATA_END__ = .; 111 } >RAM 112 113 stacks (NOLOAD) : { 114 __STACKS_START__ = .; 115 *(tzfw_normal_stacks) 116 __STACKS_END__ = .; 117 } >RAM 118 119 /* 120 * The .bss section gets initialised to 0 at runtime. 121 * Its base address should be 16-byte aligned for better performance of the 122 * zero-initialization code. 123 */ 124 .bss : ALIGN(16) { 125 __BSS_START__ = .; 126 *(SORT_BY_ALIGNMENT(.bss*)) 127 *(COMMON) 128 __BSS_END__ = .; 129 } >RAM 130 131 /* 132 * The xlat_table section is for full, aligned page tables (4K). 133 * Removing them from .bss avoids forcing 4K alignment on 134 * the .bss section and eliminates the unecessary zero init 135 */ 136 xlat_table (NOLOAD) : { 137 *(xlat_table) 138 } >RAM 139 140#if USE_COHERENT_MEM 141 /* 142 * The base address of the coherent memory section must be page-aligned (4K) 143 * to guarantee that the coherent data are stored on their own pages and 144 * are not mixed with normal data. This is required to set up the correct 145 * memory attributes for the coherent data page tables. 146 */ 147 coherent_ram (NOLOAD) : ALIGN(4096) { 148 __COHERENT_RAM_START__ = .; 149 *(tzfw_coherent_mem) 150 __COHERENT_RAM_END_UNALIGNED__ = .; 151 /* 152 * Memory page(s) mapped to this section will be marked 153 * as device memory. No other unexpected data must creep in. 154 * Ensure the rest of the current memory page is unused. 155 */ 156 . = NEXT(4096); 157 __COHERENT_RAM_END__ = .; 158 } >RAM 159#endif 160 161 /* 162 * Define a linker symbol to mark end of the RW memory area for this 163 * image. 164 */ 165 __RW_END__ = .; 166 __BL2_END__ = .; 167 168 __BSS_SIZE__ = SIZEOF(.bss); 169 170#if USE_COHERENT_MEM 171 __COHERENT_RAM_UNALIGNED_SIZE__ = 172 __COHERENT_RAM_END_UNALIGNED__ - __COHERENT_RAM_START__; 173#endif 174 175 ASSERT(. <= BL2_LIMIT, "BL2 image has exceeded its limit.") 176} 177