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Diffstat (limited to '')
| -rw-r--r-- | include/common/bl_common.ld.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/include/common/bl_common.ld.h b/include/common/bl_common.ld.h new file mode 100644 index 0000000..080e331 --- /dev/null +++ b/include/common/bl_common.ld.h @@ -0,0 +1,231 @@ +/* + * Copyright (c) 2020-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef BL_COMMON_LD_H +#define BL_COMMON_LD_H + +#include <platform_def.h> + +#ifdef __aarch64__ +#define STRUCT_ALIGN 8 +#define BSS_ALIGN 16 +#else +#define STRUCT_ALIGN 4 +#define BSS_ALIGN 8 +#endif + +#ifndef DATA_ALIGN +#define DATA_ALIGN 1 +#endif + +#define CPU_OPS \ + . = ALIGN(STRUCT_ALIGN); \ + __CPU_OPS_START__ = .; \ + KEEP(*(cpu_ops)) \ + __CPU_OPS_END__ = .; + +#define PARSER_LIB_DESCS \ + . = ALIGN(STRUCT_ALIGN); \ + __PARSER_LIB_DESCS_START__ = .; \ + KEEP(*(.img_parser_lib_descs)) \ + __PARSER_LIB_DESCS_END__ = .; + +#define RT_SVC_DESCS \ + . = ALIGN(STRUCT_ALIGN); \ + __RT_SVC_DESCS_START__ = .; \ + KEEP(*(rt_svc_descs)) \ + __RT_SVC_DESCS_END__ = .; + +#if SPMC_AT_EL3 +#define EL3_LP_DESCS \ + . = ALIGN(STRUCT_ALIGN); \ + __EL3_LP_DESCS_START__ = .; \ + KEEP(*(el3_lp_descs)) \ + __EL3_LP_DESCS_END__ = .; +#else +#define EL3_LP_DESCS +#endif + +#define PMF_SVC_DESCS \ + . = ALIGN(STRUCT_ALIGN); \ + __PMF_SVC_DESCS_START__ = .; \ + KEEP(*(pmf_svc_descs)) \ + __PMF_SVC_DESCS_END__ = .; + +#define FCONF_POPULATOR \ + . = ALIGN(STRUCT_ALIGN); \ + __FCONF_POPULATOR_START__ = .; \ + KEEP(*(.fconf_populator)) \ + __FCONF_POPULATOR_END__ = .; + +/* + * Keep the .got section in the RO section as it is patched prior to enabling + * the MMU and having the .got in RO is better for security. GOT is a table of + * addresses so ensure pointer size alignment. + */ +#define GOT \ + . = ALIGN(STRUCT_ALIGN); \ + __GOT_START__ = .; \ + *(.got) \ + __GOT_END__ = .; + +/* + * The base xlat table + * + * It is put into the rodata section if PLAT_RO_XLAT_TABLES=1, + * or into the bss section otherwise. + */ +#define BASE_XLAT_TABLE \ + . = ALIGN(16); \ + __BASE_XLAT_TABLE_START__ = .; \ + *(base_xlat_table) \ + __BASE_XLAT_TABLE_END__ = .; + +#if PLAT_RO_XLAT_TABLES +#define BASE_XLAT_TABLE_RO BASE_XLAT_TABLE +#define BASE_XLAT_TABLE_BSS +#else +#define BASE_XLAT_TABLE_RO +#define BASE_XLAT_TABLE_BSS BASE_XLAT_TABLE +#endif + +#define RODATA_COMMON \ + RT_SVC_DESCS \ + FCONF_POPULATOR \ + PMF_SVC_DESCS \ + PARSER_LIB_DESCS \ + CPU_OPS \ + GOT \ + BASE_XLAT_TABLE_RO \ + EL3_LP_DESCS + +/* + * .data must be placed at a lower address than the stacks if the stack + * protector is enabled. Alternatively, the .data.stack_protector_canary + * section can be placed independently of the main .data section. + */ +#define DATA_SECTION \ + .data . : ALIGN(DATA_ALIGN) { \ + __DATA_START__ = .; \ + *(SORT_BY_ALIGNMENT(.data*)) \ + __DATA_END__ = .; \ + } + +/* + * .rela.dyn needs to come after .data for the read-elf utility to parse + * this section correctly. + */ +#if __aarch64__ +#define RELA_DYN_NAME .rela.dyn +#define RELOC_SECTIONS_PATTERN *(.rela*) +#else +#define RELA_DYN_NAME .rel.dyn +#define RELOC_SECTIONS_PATTERN *(.rel*) +#endif + +#define RELA_SECTION \ + RELA_DYN_NAME : ALIGN(STRUCT_ALIGN) { \ + __RELA_START__ = .; \ + RELOC_SECTIONS_PATTERN \ + __RELA_END__ = .; \ + } + +#if !(defined(IMAGE_BL31) && RECLAIM_INIT_CODE) +#define STACK_SECTION \ + stacks (NOLOAD) : { \ + __STACKS_START__ = .; \ + *(tzfw_normal_stacks) \ + __STACKS_END__ = .; \ + } +#endif + +/* + * If BL doesn't use any bakery lock then __PERCPU_BAKERY_LOCK_SIZE__ + * will be zero. For this reason, the only two valid values for + * __PERCPU_BAKERY_LOCK_SIZE__ are 0 or the platform defined value + * PLAT_PERCPU_BAKERY_LOCK_SIZE. + */ +#ifdef PLAT_PERCPU_BAKERY_LOCK_SIZE +#define BAKERY_LOCK_SIZE_CHECK \ + ASSERT((__PERCPU_BAKERY_LOCK_SIZE__ == 0) || \ + (__PERCPU_BAKERY_LOCK_SIZE__ == PLAT_PERCPU_BAKERY_LOCK_SIZE), \ + "PLAT_PERCPU_BAKERY_LOCK_SIZE does not match bakery lock requirements"); +#else +#define BAKERY_LOCK_SIZE_CHECK +#endif + +/* + * Bakery locks are stored in normal .bss memory + * + * Each lock's data is spread across multiple cache lines, one per CPU, + * but multiple locks can share the same cache line. + * The compiler will allocate enough memory for one CPU's bakery locks, + * the remaining cache lines are allocated by the linker script + */ +#if !USE_COHERENT_MEM +#define BAKERY_LOCK_NORMAL \ + . = ALIGN(CACHE_WRITEBACK_GRANULE); \ + __BAKERY_LOCK_START__ = .; \ + __PERCPU_BAKERY_LOCK_START__ = .; \ + *(bakery_lock) \ + . = ALIGN(CACHE_WRITEBACK_GRANULE); \ + __PERCPU_BAKERY_LOCK_END__ = .; \ + __PERCPU_BAKERY_LOCK_SIZE__ = ABSOLUTE(__PERCPU_BAKERY_LOCK_END__ - __PERCPU_BAKERY_LOCK_START__); \ + . = . + (__PERCPU_BAKERY_LOCK_SIZE__ * (PLATFORM_CORE_COUNT - 1)); \ + __BAKERY_LOCK_END__ = .; \ + BAKERY_LOCK_SIZE_CHECK +#else +#define BAKERY_LOCK_NORMAL +#endif + +/* + * Time-stamps are stored in normal .bss memory + * + * The compiler will allocate enough memory for one CPU's time-stamps, + * the remaining memory for other CPUs is allocated by the + * linker script + */ +#define PMF_TIMESTAMP \ + . = ALIGN(CACHE_WRITEBACK_GRANULE); \ + __PMF_TIMESTAMP_START__ = .; \ + KEEP(*(pmf_timestamp_array)) \ + . = ALIGN(CACHE_WRITEBACK_GRANULE); \ + __PMF_PERCPU_TIMESTAMP_END__ = .; \ + __PERCPU_TIMESTAMP_SIZE__ = ABSOLUTE(. - __PMF_TIMESTAMP_START__); \ + . = . + (__PERCPU_TIMESTAMP_SIZE__ * (PLATFORM_CORE_COUNT - 1)); \ + __PMF_TIMESTAMP_END__ = .; + + +/* + * The .bss section gets initialised to 0 at runtime. + * Its base address has bigger alignment for better performance of the + * zero-initialization code. + */ +#define BSS_SECTION \ + .bss (NOLOAD) : ALIGN(BSS_ALIGN) { \ + __BSS_START__ = .; \ + *(SORT_BY_ALIGNMENT(.bss*)) \ + *(COMMON) \ + BAKERY_LOCK_NORMAL \ + PMF_TIMESTAMP \ + BASE_XLAT_TABLE_BSS \ + __BSS_END__ = .; \ + } + +/* + * The xlat_table section is for full, aligned page tables (4K). + * Removing them from .bss avoids forcing 4K alignment on + * the .bss section. The tables are initialized to zero by the translation + * tables library. + */ +#define XLAT_TABLE_SECTION \ + xlat_table (NOLOAD) : { \ + __XLAT_TABLE_START__ = .; \ + *(xlat_table) \ + __XLAT_TABLE_END__ = .; \ + } + +#endif /* BL_COMMON_LD_H */ |