1 /* 2 * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef BL_COMMON_LD_H 8 #define BL_COMMON_LD_H 9 10 #include <platform_def.h> 11 12 #ifdef __aarch64__ 13 #define STRUCT_ALIGN 8 14 #define BSS_ALIGN 16 15 #else 16 #define STRUCT_ALIGN 4 17 #define BSS_ALIGN 8 18 #endif 19 20 #define CPU_OPS \ 21 . = ALIGN(STRUCT_ALIGN); \ 22 __CPU_OPS_START__ = .; \ 23 KEEP(*(cpu_ops)) \ 24 __CPU_OPS_END__ = .; 25 26 #define PARSER_LIB_DESCS \ 27 . = ALIGN(STRUCT_ALIGN); \ 28 __PARSER_LIB_DESCS_START__ = .; \ 29 KEEP(*(.img_parser_lib_descs)) \ 30 __PARSER_LIB_DESCS_END__ = .; 31 32 #define RT_SVC_DESCS \ 33 . = ALIGN(STRUCT_ALIGN); \ 34 __RT_SVC_DESCS_START__ = .; \ 35 KEEP(*(rt_svc_descs)) \ 36 __RT_SVC_DESCS_END__ = .; 37 38 #define PMF_SVC_DESCS \ 39 . = ALIGN(STRUCT_ALIGN); \ 40 __PMF_SVC_DESCS_START__ = .; \ 41 KEEP(*(pmf_svc_descs)) \ 42 __PMF_SVC_DESCS_END__ = .; 43 44 #define FCONF_POPULATOR \ 45 . = ALIGN(STRUCT_ALIGN); \ 46 __FCONF_POPULATOR_START__ = .; \ 47 KEEP(*(.fconf_populator)) \ 48 __FCONF_POPULATOR_END__ = .; 49 50 /* 51 * Keep the .got section in the RO section as it is patched prior to enabling 52 * the MMU and having the .got in RO is better for security. GOT is a table of 53 * addresses so ensure pointer size alignment. 54 */ 55 #define GOT \ 56 . = ALIGN(STRUCT_ALIGN); \ 57 __GOT_START__ = .; \ 58 *(.got) \ 59 __GOT_END__ = .; 60 61 #define RODATA_COMMON \ 62 RT_SVC_DESCS \ 63 FCONF_POPULATOR \ 64 PMF_SVC_DESCS \ 65 PARSER_LIB_DESCS \ 66 CPU_OPS \ 67 GOT 68 69 #define STACK_SECTION \ 70 stacks (NOLOAD) : { \ 71 __STACKS_START__ = .; \ 72 *(tzfw_normal_stacks) \ 73 __STACKS_END__ = .; \ 74 } 75 76 /* 77 * If BL doesn't use any bakery lock then __PERCPU_BAKERY_LOCK_SIZE__ 78 * will be zero. For this reason, the only two valid values for 79 * __PERCPU_BAKERY_LOCK_SIZE__ are 0 or the platform defined value 80 * PLAT_PERCPU_BAKERY_LOCK_SIZE. 81 */ 82 #ifdef PLAT_PERCPU_BAKERY_LOCK_SIZE 83 #define BAKERY_LOCK_SIZE_CHECK \ 84 ASSERT((__PERCPU_BAKERY_LOCK_SIZE__ == 0) || \ 85 (__PERCPU_BAKERY_LOCK_SIZE__ == PLAT_PERCPU_BAKERY_LOCK_SIZE), \ 86 "PLAT_PERCPU_BAKERY_LOCK_SIZE does not match bakery lock requirements"); 87 #else 88 #define BAKERY_LOCK_SIZE_CHECK 89 #endif 90 91 /* 92 * Bakery locks are stored in normal .bss memory 93 * 94 * Each lock's data is spread across multiple cache lines, one per CPU, 95 * but multiple locks can share the same cache line. 96 * The compiler will allocate enough memory for one CPU's bakery locks, 97 * the remaining cache lines are allocated by the linker script 98 */ 99 #if !USE_COHERENT_MEM 100 #define BAKERY_LOCK_NORMAL \ 101 . = ALIGN(CACHE_WRITEBACK_GRANULE); \ 102 __BAKERY_LOCK_START__ = .; \ 103 __PERCPU_BAKERY_LOCK_START__ = .; \ 104 *(bakery_lock) \ 105 . = ALIGN(CACHE_WRITEBACK_GRANULE); \ 106 __PERCPU_BAKERY_LOCK_END__ = .; \ 107 __PERCPU_BAKERY_LOCK_SIZE__ = ABSOLUTE(__PERCPU_BAKERY_LOCK_END__ - __PERCPU_BAKERY_LOCK_START__); \ 108 . = . + (__PERCPU_BAKERY_LOCK_SIZE__ * (PLATFORM_CORE_COUNT - 1)); \ 109 __BAKERY_LOCK_END__ = .; \ 110 BAKERY_LOCK_SIZE_CHECK 111 #else 112 #define BAKERY_LOCK_NORMAL 113 #endif 114 115 /* 116 * Time-stamps are stored in normal .bss memory 117 * 118 * The compiler will allocate enough memory for one CPU's time-stamps, 119 * the remaining memory for other CPUs is allocated by the 120 * linker script 121 */ 122 #define PMF_TIMESTAMP \ 123 . = ALIGN(CACHE_WRITEBACK_GRANULE); \ 124 __PMF_TIMESTAMP_START__ = .; \ 125 KEEP(*(pmf_timestamp_array)) \ 126 . = ALIGN(CACHE_WRITEBACK_GRANULE); \ 127 __PMF_PERCPU_TIMESTAMP_END__ = .; \ 128 __PERCPU_TIMESTAMP_SIZE__ = ABSOLUTE(. - __PMF_TIMESTAMP_START__); \ 129 . = . + (__PERCPU_TIMESTAMP_SIZE__ * (PLATFORM_CORE_COUNT - 1)); \ 130 __PMF_TIMESTAMP_END__ = .; 131 132 133 /* 134 * The .bss section gets initialised to 0 at runtime. 135 * Its base address has bigger alignment for better performance of the 136 * zero-initialization code. 137 */ 138 #define BSS_SECTION \ 139 .bss (NOLOAD) : ALIGN(BSS_ALIGN) { \ 140 __BSS_START__ = .; \ 141 *(SORT_BY_ALIGNMENT(.bss*)) \ 142 *(COMMON) \ 143 BAKERY_LOCK_NORMAL \ 144 PMF_TIMESTAMP \ 145 __BSS_END__ = .; \ 146 } 147 148 /* 149 * The xlat_table section is for full, aligned page tables (4K). 150 * Removing them from .bss avoids forcing 4K alignment on 151 * the .bss section. The tables are initialized to zero by the translation 152 * tables library. 153 */ 154 #define XLAT_TABLE_SECTION \ 155 xlat_table (NOLOAD) : { \ 156 *(xlat_table) \ 157 } 158 159 #endif /* BL_COMMON_LD_H */ 160