diff options
Diffstat (limited to 'bsps/aarch64/shared/start')
-rw-r--r-- | bsps/aarch64/shared/start/linkcmds.base | 425 | ||||
-rw-r--r-- | bsps/aarch64/shared/start/start.S | 219 |
2 files changed, 644 insertions, 0 deletions
diff --git a/bsps/aarch64/shared/start/linkcmds.base b/bsps/aarch64/shared/start/linkcmds.base new file mode 100644 index 0000000000..450c3ba2a9 --- /dev/null +++ b/bsps/aarch64/shared/start/linkcmds.base @@ -0,0 +1,425 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup bsp_linker + * + * @brief Linker command base file. + */ + +/* + * Copyright (C) 2020 On-Line Applications Research Corporation (OAR) + * Written by Kinsey Moore <kinsey.moore@oarcorp.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +ENTRY (_start) +STARTUP (start.o) + +/* + * Global symbols that may be defined externally + */ + +bsp_stack_align = DEFINED (bsp_stack_align) ? bsp_stack_align : 16; + +bsp_stack_exception_size = DEFINED (bsp_stack_exception_size) ? bsp_stack_exception_size : 0; +bsp_stack_exception_size = ALIGN (bsp_stack_exception_size, bsp_stack_align); + +bsp_vector_table_size = DEFINED (bsp_vector_table_size) ? bsp_vector_table_size : 64; + +bsp_section_xbarrier_align = DEFINED (bsp_section_xbarrier_align) ? bsp_section_xbarrier_align : 1; +bsp_section_robarrier_align = DEFINED (bsp_section_robarrier_align) ? bsp_section_robarrier_align : 1; +bsp_section_rwbarrier_align = DEFINED (bsp_section_rwbarrier_align) ? bsp_section_rwbarrier_align : 1; + +bsp_stack_hyp_size = DEFINED (bsp_stack_hyp_size) ? bsp_stack_hyp_size : 0; +bsp_stack_hyp_size = ALIGN (bsp_stack_hyp_size, bsp_stack_align); + +MEMORY { + UNEXPECTED_SECTIONS : ORIGIN = 0xffffffff, LENGTH = 0 +} + +SECTIONS { + .start : ALIGN_WITH_INPUT { + bsp_section_start_begin = .; + KEEP (*(.bsp_start_text)) + KEEP (*(.bsp_start_data)) + bsp_section_start_end = .; + } > REGION_START AT > REGION_START + bsp_section_start_size = bsp_section_start_end - bsp_section_start_begin; + + .xbarrier : ALIGN_WITH_INPUT { + . = ALIGN (bsp_section_xbarrier_align); + } > REGION_VECTOR AT > REGION_VECTOR + + .text : ALIGN_WITH_INPUT { + bsp_section_text_begin = .; + *(.text.unlikely .text.*_unlikely) + *(.text .stub .text.* .gnu.linkonce.t.*) + /* .gnu.warning sections are handled specially by elf32.em. */ + *(.gnu.warning) + *(.glue_7t) *(.glue_7) *(.vfp11_veneer) *(.v4_bx) + } > REGION_TEXT AT > REGION_TEXT_LOAD + .init : ALIGN_WITH_INPUT { + KEEP (*(.init)) + } > REGION_TEXT AT > REGION_TEXT_LOAD + .fini : ALIGN_WITH_INPUT { + KEEP (*(.fini)) + bsp_section_text_end = .; + } > REGION_TEXT AT > REGION_TEXT_LOAD + bsp_section_text_size = bsp_section_text_end - bsp_section_text_begin; + bsp_section_text_load_begin = LOADADDR (.text); + bsp_section_text_load_end = bsp_section_text_load_begin + bsp_section_text_size; + + .robarrier : ALIGN_WITH_INPUT { + . = ALIGN (bsp_section_robarrier_align); + } > REGION_RODATA AT > REGION_RODATA + + .rodata : ALIGN_WITH_INPUT { + bsp_section_rodata_begin = .; + *(.rodata .rodata.* .gnu.linkonce.r.*) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rodata1 : ALIGN_WITH_INPUT { + *(.rodata1) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .ARM.extab : ALIGN_WITH_INPUT { + *(.ARM.extab* .gnu.linkonce.armextab.*) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .ARM.exidx : ALIGN_WITH_INPUT { + __exidx_start = .; + *(.ARM.exidx* .gnu.linkonce.armexidx.*) + __exidx_end = .; + } > REGION_RODATA AT > REGION_RODATA_LOAD + .eh_frame : ALIGN_WITH_INPUT { + KEEP (*(.eh_frame)) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .gcc_except_table : ALIGN_WITH_INPUT { + *(.gcc_except_table .gcc_except_table.*) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .tdata : ALIGN_WITH_INPUT { + _TLS_Data_begin = .; + *(.tdata .tdata.* .gnu.linkonce.td.*) + _TLS_Data_end = .; + } > REGION_RODATA AT > REGION_RODATA_LOAD + .tbss : ALIGN_WITH_INPUT { + _TLS_BSS_begin = .; + *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) + _TLS_BSS_end = .; + } > REGION_RODATA AT > REGION_RODATA_LOAD + _TLS_Data_size = _TLS_Data_end - _TLS_Data_begin; + _TLS_Data_begin = _TLS_Data_size != 0 ? _TLS_Data_begin : _TLS_BSS_begin; + _TLS_Data_end = _TLS_Data_size != 0 ? _TLS_Data_end : _TLS_BSS_begin; + _TLS_BSS_size = _TLS_BSS_end - _TLS_BSS_begin; + _TLS_Size = _TLS_BSS_end - _TLS_Data_begin; + _TLS_Alignment = MAX (ALIGNOF (.tdata), ALIGNOF (.tbss)); + .preinit_array : ALIGN_WITH_INPUT { + PROVIDE_HIDDEN (__preinit_array_start = .); + KEEP (*(.preinit_array)) + PROVIDE_HIDDEN (__preinit_array_end = .); + } > REGION_RODATA AT > REGION_RODATA_LOAD + .init_array : ALIGN_WITH_INPUT { + PROVIDE_HIDDEN (__init_array_start = .); + KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*))) + KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors)) + PROVIDE_HIDDEN (__init_array_end = .); + } > REGION_RODATA AT > REGION_RODATA_LOAD + .fini_array : ALIGN_WITH_INPUT { + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*))) + KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors)) + PROVIDE_HIDDEN (__fini_array_end = .); + } > REGION_RODATA AT > REGION_RODATA_LOAD + .data.rel.ro : ALIGN_WITH_INPUT { + *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) + *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .jcr : ALIGN_WITH_INPUT { + KEEP (*(.jcr)) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .interp : ALIGN_WITH_INPUT { + *(.interp) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .note.gnu.build-id : ALIGN_WITH_INPUT { + *(.note.gnu.build-id) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .hash : ALIGN_WITH_INPUT { + *(.hash) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .gnu.hash : ALIGN_WITH_INPUT { + *(.gnu.hash) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .dynsym : ALIGN_WITH_INPUT { + *(.dynsym) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .dynstr : ALIGN_WITH_INPUT { + *(.dynstr) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .gnu.version : ALIGN_WITH_INPUT { + *(.gnu.version) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .gnu.version_d : ALIGN_WITH_INPUT { + *(.gnu.version_d) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .gnu.version_r : ALIGN_WITH_INPUT { + *(.gnu.version_r) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rel.dyn : ALIGN_WITH_INPUT { + *(.rel.init) + *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) + *(.rel.fini) + *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) + *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*) + *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) + *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) + *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) + *(.rel.ctors) + *(.rel.dtors) + *(.rel.got) + *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) + PROVIDE_HIDDEN (__rel_iplt_start = .); + *(.rel.iplt) + PROVIDE_HIDDEN (__rel_iplt_end = .); + PROVIDE_HIDDEN (__rela_iplt_start = .); + PROVIDE_HIDDEN (__rela_iplt_end = .); + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rela.dyn : ALIGN_WITH_INPUT { + *(.rela.init) + *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) + *(.rela.fini) + *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) + *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) + *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) + *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) + *(.rela.ctors) + *(.rela.dtors) + *(.rela.got) + *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) + *(.rela.rtemsroset*) + *(.rela.rtemsrwset*) + PROVIDE_HIDDEN (__rel_iplt_start = .); + PROVIDE_HIDDEN (__rel_iplt_end = .); + PROVIDE_HIDDEN (__rela_iplt_start = .); + *(.rela.iplt) + PROVIDE_HIDDEN (__rela_iplt_end = .); + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rel.plt : ALIGN_WITH_INPUT { + *(.rel.plt) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rela.plt : ALIGN_WITH_INPUT { + *(.rela.plt) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .plt : ALIGN_WITH_INPUT { + *(.plt) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .iplt : ALIGN_WITH_INPUT { + *(.iplt) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .dynamic : ALIGN_WITH_INPUT { + *(.dynamic) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .tm_clone_table : ALIGN_WITH_INPUT { + *(.tm_clone_table) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .got : ALIGN_WITH_INPUT { + *(.got.plt) *(.igot.plt) *(.got) *(.igot) + } > REGION_RODATA AT > REGION_RODATA_LOAD + .rtemsroset : ALIGN_WITH_INPUT SUBALIGN(4) { + /* Special FreeBSD linker set sections */ + __start_set_sysctl_set = .; + *(set_sysctl_*); + __stop_set_sysctl_set = .; + *(set_domain_*); + *(set_pseudo_*); + + KEEP (*(SORT(.rtemsroset.*))) + bsp_section_rodata_end = .; + } > REGION_RODATA AT > REGION_RODATA_LOAD + bsp_section_rodata_size = bsp_section_rodata_end - bsp_section_rodata_begin; + bsp_section_rodata_load_begin = LOADADDR (.rodata); + bsp_section_rodata_load_end = bsp_section_rodata_load_begin + bsp_section_rodata_size; + + .rwbarrier : ALIGN_WITH_INPUT { + . = ALIGN (bsp_section_rwbarrier_align); + } > REGION_DATA AT > REGION_DATA + + .vector : ALIGN_WITH_INPUT { + bsp_section_vector_begin = .; + . = . + DEFINED (bsp_vector_table_in_start_section) ? 0 : bsp_vector_table_size; + bsp_section_vector_end = .; + } > REGION_VECTOR AT > REGION_VECTOR + bsp_section_vector_size = bsp_section_vector_end - bsp_section_vector_begin; + bsp_vector_table_begin = DEFINED (bsp_vector_table_in_start_section) ? bsp_section_start_begin : bsp_section_vector_begin; + bsp_vector_table_end = bsp_vector_table_begin + bsp_vector_table_size; + + .fast_text : ALIGN_WITH_INPUT { + bsp_section_fast_text_begin = .; + *(.bsp_fast_text) + bsp_section_fast_text_end = .; + } > REGION_FAST_TEXT AT > REGION_FAST_TEXT_LOAD + bsp_section_fast_text_size = bsp_section_fast_text_end - bsp_section_fast_text_begin; + bsp_section_fast_text_load_begin = LOADADDR (.fast_text); + bsp_section_fast_text_load_end = bsp_section_fast_text_load_begin + bsp_section_fast_text_size; + + .fast_data : ALIGN_WITH_INPUT { + bsp_section_fast_data_begin = .; + *(.bsp_fast_data) + bsp_section_fast_data_end = .; + } > REGION_FAST_DATA AT > REGION_FAST_DATA_LOAD + bsp_section_fast_data_size = bsp_section_fast_data_end - bsp_section_fast_data_begin; + bsp_section_fast_data_load_begin = LOADADDR (.fast_data); + bsp_section_fast_data_load_end = bsp_section_fast_data_load_begin + bsp_section_fast_data_size; + + .data : ALIGN_WITH_INPUT { + bsp_section_data_begin = .; + *(.data .data.* .gnu.linkonce.d.*) + SORT(CONSTRUCTORS) + } > REGION_DATA AT > REGION_DATA_LOAD + .data1 : ALIGN_WITH_INPUT { + *(.data1) + } > REGION_DATA AT > REGION_DATA_LOAD + .rtemsrwset : ALIGN_WITH_INPUT SUBALIGN(4) { + KEEP (*(SORT(.rtemsrwset.*))) + bsp_section_data_end = .; + } > REGION_DATA AT > REGION_DATA_LOAD + bsp_section_data_size = bsp_section_data_end - bsp_section_data_begin; + bsp_section_data_load_begin = LOADADDR (.data); + bsp_section_data_load_end = bsp_section_data_load_begin + bsp_section_data_size; + + .bss : ALIGN_WITH_INPUT { + bsp_section_bss_begin = .; + *(.dynbss) + *(.bss .bss.* .gnu.linkonce.b.*) + *(COMMON) + bsp_section_bss_end = .; + } > REGION_BSS AT > REGION_BSS + bsp_section_bss_size = bsp_section_bss_end - bsp_section_bss_begin; + + .rtemsstack (NOLOAD) : ALIGN_WITH_INPUT { + bsp_section_rtemsstack_begin = .; + *(SORT_BY_ALIGNMENT (SORT_BY_NAME (.rtemsstack*))) + bsp_section_rtemsstack_end = .; + } > REGION_WORK AT > REGION_WORK + bsp_section_rtemsstack_size = bsp_section_rtemsstack_end - bsp_section_rtemsstack_begin; + + .work : ALIGN_WITH_INPUT { + /* + * The work section will occupy the remaining REGION_WORK region and + * contains the RTEMS work space and heap. + */ + bsp_section_work_begin = .; + . += ORIGIN (REGION_WORK) + LENGTH (REGION_WORK) - ABSOLUTE (.); + bsp_section_work_end = .; + } > REGION_WORK AT > REGION_WORK + bsp_section_work_size = bsp_section_work_end - bsp_section_work_begin; + + .stack : ALIGN_WITH_INPUT { + /* + * The stack section will occupy the remaining REGION_STACK region and may + * contain the task stacks. Depending on the region distribution this + * section may be of zero size. + */ + bsp_section_stack_begin = .; + . += ORIGIN (REGION_STACK) + LENGTH (REGION_STACK) - ABSOLUTE (.); + bsp_section_stack_end = .; + } > REGION_STACK AT > REGION_STACK + bsp_section_stack_size = bsp_section_stack_end - bsp_section_stack_begin; + + .nocache : ALIGN_WITH_INPUT { + bsp_section_nocache_begin = .; + *(SORT_BY_ALIGNMENT (SORT_BY_NAME (.bsp_nocache*))) + bsp_section_nocache_end = .; + } > REGION_NOCACHE AT > REGION_NOCACHE_LOAD + bsp_section_nocache_size = bsp_section_nocache_end - bsp_section_nocache_begin; + bsp_section_nocache_load_begin = LOADADDR (.nocache); + bsp_section_nocache_load_end = bsp_section_nocache_load_begin + bsp_section_nocache_size; + + .nocachenoload (NOLOAD) : ALIGN_WITH_INPUT { + bsp_section_nocachenoload_begin = .; + *(SORT_BY_ALIGNMENT (SORT_BY_NAME (.bsp_noload_nocache*))) + bsp_section_nocacheheap_begin = .; + . += ORIGIN (REGION_NOCACHE) + LENGTH (REGION_NOCACHE) - ABSOLUTE (.); + bsp_section_nocacheheap_end = .; + bsp_section_nocachenoload_end = .; + } > REGION_NOCACHE AT > REGION_NOCACHE + bsp_section_nocacheheap_size = bsp_section_nocacheheap_end - bsp_section_nocacheheap_begin; + bsp_section_nocachenoload_size = bsp_section_nocachenoload_end - bsp_section_nocachenoload_begin; + + /* FIXME */ + RamBase = ORIGIN (REGION_WORK); + RamSize = LENGTH (REGION_WORK); + RamEnd = RamBase + RamSize; + WorkAreaBase = bsp_section_work_begin; + HeapSize = 0; + + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + /* DWARF debug sections. + Symbols in the DWARF debugging sections are relative to the beginning + of the section so we begin them at 0. */ + /* DWARF 1 */ + .debug 0 : { *(.debug) } + .line 0 : { *(.line) } + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : { *(.debug_srcinfo) } + .debug_sfnames 0 : { *(.debug_sfnames) } + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : { *(.debug_aranges) } + .debug_pubnames 0 : { *(.debug_pubnames) } + /* DWARF 2 */ + .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_line 0 : { *(.debug_line) } + .debug_frame 0 : { *(.debug_frame) } + .debug_str 0 : { *(.debug_str) } + .debug_loc 0 : { *(.debug_loc) } + .debug_macinfo 0 : { *(.debug_macinfo) } + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : { *(.debug_weaknames) } + .debug_funcnames 0 : { *(.debug_funcnames) } + .debug_typenames 0 : { *(.debug_typenames) } + .debug_varnames 0 : { *(.debug_varnames) } + /* DWARF 3 */ + .debug_pubtypes 0 : { *(.debug_pubtypes) } + .debug_ranges 0 : { *(.debug_ranges) } + /* DWARF extension */ + .debug_macro 0 : { *(.debug_macro) } + .ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) } + .note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) } + /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) } + + /* + * This is a RTEMS specific section to catch all unexpected input + * sections. In case you get an error like + * "section `.unexpected_sections' will not fit in region + * `UNEXPECTED_SECTIONS'" + * you have to figure out the offending input section and add it to the + * appropriate output section definition above. + */ + .unexpected_sections : { *(*) } > UNEXPECTED_SECTIONS +} diff --git a/bsps/aarch64/shared/start/start.S b/bsps/aarch64/shared/start/start.S new file mode 100644 index 0000000000..f60e840137 --- /dev/null +++ b/bsps/aarch64/shared/start/start.S @@ -0,0 +1,219 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup RTEMSBSPsAArch64Shared + * + * @brief Boot and system start code. + */ + +/* + * Copyright (C) 2020 On-Line Applications Research Corporation (OAR) + * Written by Kinsey Moore <kinsey.moore@oarcorp.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <rtems/asm.h> +#include <rtems/score/percpu.h> + +#include <bspopts.h> + + /* Global symbols */ + .globl _start + .section ".bsp_start_text", "ax" + +/* Start entry */ + +_start: + + /* + * We do not save the context since we do not return to the boot + * loader but preserve x1 and x2 to allow access to bootloader parameters + */ +#ifndef BSP_START_NEEDS_REGISTER_INITIALIZATION + mov x5, x1 /* machine type number or ~0 for DT boot */ + mov x6, x2 /* physical address of ATAGs or DTB */ +#else /* BSP_START_NEEDS_REGISTER_INITIALIZATION */ + mov x0, XZR + mov x1, XZR + mov x2, XZR + mov x3, XZR + mov x4, XZR + mov x5, XZR + mov x6, XZR + mov x7, XZR + mov x8, XZR + mov x9, XZR + mov x10, XZR + mov x11, XZR + mov x12, XZR + mov x13, XZR + mov x14, XZR + mov x15, XZR + mov x16, XZR + mov x17, XZR + mov x18, XZR + mov x19, XZR + mov x20, XZR + mov x21, XZR + mov x22, XZR + mov x23, XZR + mov x24, XZR + mov x25, XZR + mov x26, XZR + mov x27, XZR + mov x28, XZR + mov x29, XZR + mov x30, XZR +#ifdef AARCH64_MULTILIB_VFP +#endif +#endif + +#ifdef RTEMS_SMP + /* Read MPIDR and get current processor index */ + mrs x7, mpidr_el1 + and x7, #0xff +#endif + +#ifdef RTEMS_SMP + /* + * Get current per-CPU control and store it in PL1 only Thread ID + * Register (TPIDRPRW). + */ + ldr x1, =_Per_CPU_Information + add x1, x1, x7, asl #PER_CPU_CONTROL_SIZE_LOG2 + mcr p15, 0, x1, c13, c0, 4 + +#endif + + /* Calculate interrupt stack area end for current processor */ + ldr x1, =_ISR_Stack_size +#ifdef RTEMS_SMP + add x3, x7, #1 + mul x1, x1, x3 +#endif + ldr x2, =_ISR_Stack_area_begin + add x3, x1, x2 + + /* Save original DAIF value */ + mrs x4, DAIF + +#ifdef BSP_START_NEEDS_REGISTER_INITIALIZATION + mov x8, XZR + mov x9, XZR + mov x10, XZR + mov x11, XZR + mov x12, XZR + mov x13, XZR + mov x14, XZR + mov x15, XZR +#endif + + /* + * SPx: the stack pointer corresponding to the current exception level + * Normal operation for RTEMS on AArch64 uses SPx and runs on EL1 + * Exception operation (synchronous errors, IRQ, FIQ, System Errors) uses SP0 + */ + ldr x1, =bsp_stack_exception_size + /* Switch to SP0 and set exception stack */ + msr spsel, #0 + mov sp, x3 + /* Switch back to SPx for normal operation */ + msr spsel, #1 + sub x3, x3, x1 + + /* Set SP1 stack used for normal operation */ + mov sp, x3 + + /* Stay in EL1 mode */ + +#ifdef AARCH64_MULTILIB_VFP +#ifdef AARCH64_MULTILIB_HAS_CPACR + /* Read CPACR */ + mrs x0, CPACR_EL1 + + /* Enable EL1 access permissions for CP10 */ + orr x0, x0, #(1 << 20) + + /* Write CPACR */ + msr CPACR_EL1, x0 + isb +#endif + + /* FPU does not need to be enabled on AArch64 */ + +#ifdef BSP_START_NEEDS_REGISTER_INITIALIZATION + mov x0, #0 + mov CPTR_EL3, XZR + mov CPTR_EL2, XZR + mov d0, XZR + mov d1, XZR + mov d2, XZR + mov d3, XZR + mov d4, XZR + mov d5, XZR + mov d6, XZR + mov d7, XZR + mov d8, XZR + mov d9, XZR + mov d10, XZR + mov d11, XZR + mov d12, XZR + mov d13, XZR + mov d14, XZR + mov d15, XZR + mov d16, XZR + mov d17, XZR + mov d18, XZR + mov d19, XZR + mov d20, XZR + mov d21, XZR + mov d22, XZR + mov d23, XZR + mov d24, XZR + mov d25, XZR + mov d26, XZR + mov d27, XZR + mov d28, XZR + mov d29, XZR + mov d30, XZR + mov d31, XZR +#endif /* BSP_START_NEEDS_REGISTER_INITIALIZATION */ + +#endif /* AARCH64_MULTILIB_VFP */ + + /* + * Invoke the start hook 0. + * + */ + + mov x1, x5 /* machine type number or ~0 for DT boot */ + bl bsp_start_hook_0 + + /* Branch to start hook 1 */ + bl bsp_start_hook_1 + + /* Branch to boot card */ + mov x0, #0 + bl boot_card |