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