| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * @brief Linker command/script file |
| * |
| * Linker script for the Nios II platform |
| */ |
| |
| #define _LINKER |
| #define _ASMLANGUAGE |
| |
| #include <autoconf.h> |
| #include <sections.h> |
| |
| #include <linker-defs.h> |
| #include <linker-tool.h> |
| |
| /* These sections are specific to this CPU */ |
| #define _EXCEPTION_SECTION_NAME exceptions |
| #define _RESET_SECTION_NAME reset |
| |
| /* This linker script requires the following macros to be defined in the |
| * SOC-specfic linker script. All of these values can be found defined |
| * in system.h for CPU configurations that can generate a HAL. |
| * |
| * _RESET_VECTOR CPU entry point at boot |
| * _EXC_VECTOR General exception vector |
| * _ROM_ADDR Beginning of flash memory |
| * _ROM_SIZE Size in bytes of flash memory |
| * _RAM_ADDR Beginning of RAM |
| * _RAM_SIZE Size of RAM in bytes |
| * |
| * For now we support two scenarios: |
| * |
| * 1. Non-XIP systems where the reset vector is at the beginning of RAM |
| * with the exception vector 0x20 bytes after it. |
| * 2. XIP systems where the reset vector is at the beginning of ROM and |
| * the exception vector is in RAM |
| */ |
| |
| |
| #ifdef CONFIG_XIP |
| #define ROMABLE_REGION FLASH |
| #define RAMABLE_REGION SRAM |
| #else |
| #define ROMABLE_REGION SRAM |
| #define RAMABLE_REGION SRAM |
| #endif |
| |
| #ifdef CONFIG_XIP |
| |
| ASSERT(_RESET_VECTOR == _ROM_ADDR, "Reset vector not at beginning of ROM!") |
| |
| MEMORY |
| { |
| RESET (rx) : ORIGIN = _RESET_VECTOR, LENGTH = 0x20 |
| FLASH (rx) : ORIGIN = _RESET_VECTOR + 0x20 , LENGTH = (_ROM_SIZE - 0x20) |
| SRAM (wx) : ORIGIN = _EXC_VECTOR, LENGTH = _RAM_SIZE - (_EXC_VECTOR - _RAM_ADDR) |
| } |
| |
| #else |
| |
| MEMORY |
| { |
| RESET (wx) : ORIGIN = _RESET_VECTOR, LENGTH = 0x20 |
| SRAM (wx) : ORIGIN = _EXC_VECTOR, LENGTH = _RAM_SIZE - (_EXC_VECTOR - _RAM_ADDR) |
| } |
| #endif |
| |
| SECTIONS |
| { |
| GROUP_START(ROMABLE_REGION) |
| _image_rom_start = _ROM_ADDR; |
| |
| SECTION_PROLOGUE(_RESET_SECTION_NAME,,) |
| { |
| KEEP(*(.reset.*)) |
| } GROUP_LINK_IN(RESET) |
| |
| #ifndef CONFIG_XIP |
| SECTION_PROLOGUE(_EXCEPTION_SECTION_NAME,,) |
| { |
| KEEP(*(".exception.entry.*")) |
| *(".exception.other.*") |
| |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| #endif |
| |
| SECTION_PROLOGUE(_TEXT_SECTION_NAME,,) |
| { |
| /* XXX If ALT_CPU_RESET_ADDR is not the same as _ROM_ADDR |
| * we are going to waste flash space? */ |
| . = ALT_CPU_RESET_ADDR; |
| |
| _image_text_start = .; |
| *(.text) |
| *(".text.*") |
| *(.gnu.linkonce.t.*) |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| |
| _image_text_end = .; |
| |
| #if defined(CONFIG_GP_ALL_DATA) |
| _gp = ABSOLUTE(. + 0x8000); |
| PROVIDE(gp = _gp); |
| #endif |
| |
| #ifdef CONFIG_CPLUSPLUS |
| SECTION_PROLOGUE(_CTOR_SECTION_NAME, ,) |
| { |
| /* |
| * The compiler fills the constructor pointers table below, hence symbol |
| * __CTOR_LIST__ must be aligned on 4 byte boundary. |
| * To align with the C++ standard, the first elment of the array |
| * contains the number of actual constructors. The last element is |
| * NULL. |
| */ |
| . = ALIGN(4); |
| __CTOR_LIST__ = .; |
| LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) |
| KEEP(*(SORT_BY_NAME(".ctors*"))) |
| LONG(0) |
| __CTOR_END__ = .; |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| |
| SECTION_PROLOGUE(init_array, (OPTIONAL),) |
| { |
| . = ALIGN(4); |
| __init_array_start = .; |
| KEEP(*(SORT_BY_NAME(".init_array*"))) |
| __init_array_end = .; |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| #endif |
| |
| SECTION_PROLOGUE(devconfig, (OPTIONAL),) |
| { |
| __devconfig_start = .; |
| *(".devconfig.*") |
| KEEP(*(SORT_BY_NAME(".devconfig*"))) |
| __devconfig_end = .; |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| |
| SECTION_PROLOGUE(_RODATA_SECTION_NAME,,) |
| { |
| *(.rodata) |
| *(".rodata.*") |
| *(.gnu.linkonce.r.*) |
| } GROUP_LINK_IN(ROMABLE_REGION) |
| |
| _image_rom_end = .; |
| __data_rom_start = ALIGN(4); /* XIP imaged DATA ROM start addr */ |
| |
| GROUP_END(ROMABLE_REGION) |
| |
| GROUP_START(RAMABLE_REGION) |
| |
| #ifdef CONFIG_XIP |
| /* Altera strongly recommends keeping exception entry code in RAM |
| * even on XIP systems |
| * |
| * This is code not data, but we need this copied just like XIP data |
| */ |
| |
| SECTION_AT_PROLOGUE(_EXCEPTION_SECTION_NAME,,, __data_rom_start) |
| { |
| _image_ram_start = .; |
| __data_ram_start = .; |
| |
| KEEP(*(".exception.entry.*")) |
| *(".exception.other.*") |
| |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| #endif |
| |
| SECTION_PROLOGUE(initlevel, (OPTIONAL),) |
| { |
| #ifndef CONFIG_XIP |
| _image_ram_start = .; |
| #endif |
| DEVICE_INIT_SECTIONS() |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_k_task_list, (OPTIONAL),) |
| { |
| _k_task_list_start = .; |
| *(._k_task_list.public.*) |
| *(._k_task_list.private.*) |
| _k_task_list_idle_start = .; |
| *(._k_task_list.idle.*) |
| KEEP(*(SORT_BY_NAME("._k_task_list*"))) |
| _k_task_list_end = .; |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_k_task_ptr, (OPTIONAL),) |
| { |
| _k_task_ptr_start = .; |
| *(._k_task_ptr.public.*) |
| *(._k_task_ptr.private.*) |
| *(._k_task_ptr.idle.*) |
| KEEP(*(SORT_BY_NAME("._k_task_ptr*"))) |
| _k_task_ptr_end = .; |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_k_pipe_ptr, (OPTIONAL),) |
| { |
| _k_pipe_ptr_start = .; |
| *(._k_pipe_ptr.public.*) |
| *(._k_pipe_ptr.private.*) |
| KEEP(*(SORT_BY_NAME("._k_pipe_ptr*"))) |
| _k_pipe_ptr_end = .; |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_k_mem_map_ptr, (OPTIONAL),) |
| { |
| _k_mem_map_ptr_start = .; |
| *(._k_mem_map_ptr.public.*) |
| *(._k_mem_map_ptr.private.*) |
| KEEP(*(SORT_BY_NAME("._k_mem_map_ptr*"))) |
| _k_mem_map_ptr_end = .; |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_k_event_list, (OPTIONAL),) |
| { |
| _k_event_list_start = .; |
| *(._k_event_list.event.*) |
| KEEP(*(SORT_BY_NAME("._k_event_list*"))) |
| _k_event_list_end = .; |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_DATA_SECTION_NAME,,) |
| { |
| |
| KEEP(*(.isr_irq*)) |
| |
| /* sections for IRQ0-9 */ |
| KEEP(*(SORT(.gnu.linkonce.isr_irq[0-9]))) |
| |
| /* sections for IRQ10-99 */ |
| KEEP(*(SORT(.gnu.linkonce.isr_irq[0-9][0-9]))) |
| |
| /* sections for IRQ100-999 */ |
| KEEP(*(SORT(.gnu.linkonce.isr_irq[0-9][0-9][0-9]))) |
| |
| *(.data) |
| *(".data.*") |
| |
| /* the Nios2 architecture only has 16-bit signed immediate offsets in |
| * the instructions, so accessing a general address requires typically |
| * three instructions – basically, two for the two halves of the 32-bit |
| * address, and one to merge them – but if we can put the most commonly |
| * accessed globals in a special 64K span of memory addressed by the GP |
| * register, then we can access those values in a single instruction, |
| * saving both codespace and runtime. |
| * |
| * Since these immediate offsets are signed, place gp 0x8000 past the |
| * beginning of .sdata so that we can use both positive and negative |
| * offsets. |
| */ |
| #if defined(CONFIG_GP_LOCAL) || defined(CONFIG_GP_GLOBAL) |
| _gp = ABSOLUTE(. + 0x8000); |
| PROVIDE(gp = _gp); |
| #endif |
| |
| *(.sdata .sdata.* .gnu.linkonce.s.*) |
| *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) |
| |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| __data_ram_end = .; |
| |
| SECTION_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),) |
| { |
| /* |
| * For performance, BSS section is assumed to be 4 byte aligned and |
| * a multiple of 4 bytes |
| */ |
| . = ALIGN(4); |
| __bss_start = .; |
| *(.sbss) |
| *(".sbss.*") |
| *(.bss) |
| *(".bss.*") |
| COMMON_SYMBOLS |
| /* |
| * As memory is cleared in words only, it is simpler to ensure the BSS |
| * section ends on a 4 byte boundary. This wastes a maximum of 3 bytes. |
| */ |
| __bss_end = ALIGN(4); |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| SECTION_PROLOGUE(_NOINIT_SECTION_NAME,(NOLOAD),) |
| { |
| /* |
| * This section is used for non-initialized objects that |
| * will not be cleared during the boot process. |
| */ |
| *(.noinit) |
| *(".noinit.*") |
| } GROUP_LINK_IN(RAMABLE_REGION) |
| |
| /* Define linker symbols */ |
| _image_ram_end = .; |
| _end = .; /* end of image */ |
| |
| GROUP_END(RAMABLE_REGION) |
| |
| } |
| |