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/*
* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <platform_def.h>
#include <xlat_tables_defs.h>
OUTPUT_FORMAT(PLATFORM_LINKER_FORMAT)
OUTPUT_ARCH(PLATFORM_LINKER_ARCH)
ENTRY(bl31_entrypoint)
MEMORY {
RAM (rwx): ORIGIN = BL31_BASE, LENGTH = BL31_LIMIT - BL31_BASE
}
#ifdef PLAT_EXTRA_LD_SCRIPT
#include <plat.ld.S>
#endif
SECTIONS
{
. = BL31_BASE;
ASSERT(. == ALIGN(PAGE_SIZE),
"BL31_BASE address is not aligned on a page boundary.")
__BL31_START__ = .;
#if SEPARATE_CODE_AND_RODATA
.text . : {
__TEXT_START__ = .;
*bl31_entrypoint.o(.text*)
*(.text*)
*(.vectors)
. = ALIGN(PAGE_SIZE);
__TEXT_END__ = .;
} >RAM
.rodata . : {
__RODATA_START__ = .;
*(.rodata*)
/* Ensure 8-byte alignment for descriptors and ensure inclusion */
. = ALIGN(8);
__RT_SVC_DESCS_START__ = .;
KEEP(*(rt_svc_descs))
__RT_SVC_DESCS_END__ = .;
#if ENABLE_PMF
/* Ensure 8-byte alignment for descriptors and ensure inclusion */
. = ALIGN(8);
__PMF_SVC_DESCS_START__ = .;
KEEP(*(pmf_svc_descs))
__PMF_SVC_DESCS_END__ = .;
#endif /* ENABLE_PMF */
/*
* Ensure 8-byte alignment for cpu_ops so that its fields are also
* aligned. Also ensure cpu_ops inclusion.
*/
. = ALIGN(8);
__CPU_OPS_START__ = .;
KEEP(*(cpu_ops))
__CPU_OPS_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 8-byte alignment.
*/
. = ALIGN(8);
__GOT_START__ = .;
*(.got)
__GOT_END__ = .;
/* Place pubsub sections for events */
. = ALIGN(8);
#include <pubsub_events.h>
. = ALIGN(PAGE_SIZE);
__RODATA_END__ = .;
} >RAM
#else
ro . : {
__RO_START__ = .;
*bl31_entrypoint.o(.text*)
*(.text*)
*(.rodata*)
/* Ensure 8-byte alignment for descriptors and ensure inclusion */
. = ALIGN(8);
__RT_SVC_DESCS_START__ = .;
KEEP(*(rt_svc_descs))
__RT_SVC_DESCS_END__ = .;
#if ENABLE_PMF
/* Ensure 8-byte alignment for descriptors and ensure inclusion */
. = ALIGN(8);
__PMF_SVC_DESCS_START__ = .;
KEEP(*(pmf_svc_descs))
__PMF_SVC_DESCS_END__ = .;
#endif /* ENABLE_PMF */
/*
* Ensure 8-byte alignment for cpu_ops so that its fields are also
* aligned. Also ensure cpu_ops inclusion.
*/
. = ALIGN(8);
__CPU_OPS_START__ = .;
KEEP(*(cpu_ops))
__CPU_OPS_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 8-byte alignment.
*/
. = ALIGN(8);
__GOT_START__ = .;
*(.got)
__GOT_END__ = .;
/* Place pubsub sections for events */
. = ALIGN(8);
#include <pubsub_events.h>
*(.vectors)
__RO_END_UNALIGNED__ = .;
/*
* Memory page(s) mapped to this section will be marked as read-only,
* executable. No RW data from the next section must creep in.
* Ensure the rest of the current memory page is unused.
*/
. = ALIGN(PAGE_SIZE);
__RO_END__ = .;
} >RAM
#endif
ASSERT(__CPU_OPS_END__ > __CPU_OPS_START__,
"cpu_ops not defined for this platform.")
#if ENABLE_SPM
/*
* Exception vectors of the SPM shim layer. They must be aligned to a 2K
* address, but we need to place them in a separate page so that we can set
* individual permissions to them, so the actual alignment needed is 4K.
*
* There's no need to include this into the RO section of BL31 because it
* doesn't need to be accessed by BL31.
*/
spm_shim_exceptions : ALIGN(PAGE_SIZE) {
__SPM_SHIM_EXCEPTIONS_START__ = .;
*(.spm_shim_exceptions)
. = ALIGN(PAGE_SIZE);
__SPM_SHIM_EXCEPTIONS_END__ = .;
} >RAM
#endif
/*
* Define a linker symbol to mark start of the RW memory area for this
* image.
*/
__RW_START__ = . ;
/*
* .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.
*/
.data . : {
__DATA_START__ = .;
*(.data*)
__DATA_END__ = .;
} >RAM
/*
* .rela.dyn needs to come after .data for the read-elf utility to parse
* this section correctly. Ensure 8-byte alignment so that the fields of
* RELA data structure are aligned.
*/
. = ALIGN(8);
__RELA_START__ = .;
.rela.dyn . : {
} >RAM
__RELA_END__ = .;
#ifdef BL31_PROGBITS_LIMIT
ASSERT(. <= BL31_PROGBITS_LIMIT, "BL31 progbits has exceeded its limit.")
#endif
stacks (NOLOAD) : {
__STACKS_START__ = .;
*(tzfw_normal_stacks)
__STACKS_END__ = .;
} >RAM
/*
* The .bss section gets initialised to 0 at runtime.
* Its base address should be 16-byte aligned for better performance of the
* zero-initialization code.
*/
.bss (NOLOAD) : ALIGN(16) {
__BSS_START__ = .;
*(.bss*)
*(COMMON)
#if !USE_COHERENT_MEM
/*
* 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
*/
. = ALIGN(CACHE_WRITEBACK_GRANULE);
__BAKERY_LOCK_START__ = .;
*(bakery_lock)
. = ALIGN(CACHE_WRITEBACK_GRANULE);
__PERCPU_BAKERY_LOCK_SIZE__ = ABSOLUTE(. - __BAKERY_LOCK_START__);
. = . + (__PERCPU_BAKERY_LOCK_SIZE__ * (PLATFORM_CORE_COUNT - 1));
__BAKERY_LOCK_END__ = .;
/*
* If BL31 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
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");
#endif
#endif
#if ENABLE_PMF
/*
* 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 CPU's is allocated by the
* linker script
*/
. = 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__ = .;
#endif /* ENABLE_PMF */
__BSS_END__ = .;
} >RAM
/*
* 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.
*/
xlat_table (NOLOAD) : {
*(xlat_table)
} >RAM
#if USE_COHERENT_MEM
/*
* The base address of the coherent memory section must be page-aligned (4K)
* to guarantee that the coherent data are stored on their own pages and
* are not mixed with normal data. This is required to set up the correct
* memory attributes for the coherent data page tables.
*/
coherent_ram (NOLOAD) : ALIGN(PAGE_SIZE) {
__COHERENT_RAM_START__ = .;
/*
* Bakery locks are stored in coherent memory
*
* Each lock's data is contiguous and fully allocated by the compiler
*/
*(bakery_lock)
*(tzfw_coherent_mem)
__COHERENT_RAM_END_UNALIGNED__ = .;
/*
* Memory page(s) mapped to this section will be marked
* as device memory. No other unexpected data must creep in.
* Ensure the rest of the current memory page is unused.
*/
. = ALIGN(PAGE_SIZE);
__COHERENT_RAM_END__ = .;
} >RAM
#endif
/*
* Define a linker symbol to mark end of the RW memory area for this
* image.
*/
__RW_END__ = .;
__BL31_END__ = .;
ASSERT(. <= BL31_LIMIT, "BL31 image has exceeded its limit.")
}