| /* |
| * Copyright 2021 The Pigweed Authors |
| * |
| * 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 |
| * |
| * https://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. |
| */ |
| |
| /* This linker script is derived from pw_boot_cortex_m/basic_cortex_m.ld for use |
| * with the NXP MIMXRT595-EVK, booting from FLASH. |
| */ |
| |
| /* Provide useful error messages when required configurations are not set. */ |
| #ifndef PW_BOOT_VECTOR_TABLE_BEGIN |
| #error "PW_BOOT_VECTOR_TABLE_BEGIN is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_VECTOR_TABLE_BEGIN |
| |
| #ifndef PW_BOOT_VECTOR_TABLE_SIZE |
| #error "PW_BOOT_VECTOR_TABLE_SIZE is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_VECTOR_TABLE_SIZE |
| |
| #ifndef PW_BOOT_FLASH_BEGIN |
| #error "PW_BOOT_FLASH_BEGIN is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_FLASH_BEGIN |
| |
| #ifndef PW_BOOT_FLASH_SIZE |
| #error "PW_BOOT_FLASH_SIZE is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_FLASH_SIZE |
| |
| #ifndef PW_BOOT_RAM_BEGIN |
| #error "PW_BOOT_RAM_BEGIN is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_RAM_BEGIN |
| |
| #ifndef PW_BOOT_RAM_SIZE |
| #error "PW_BOOT_RAM_SIZE is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_RAM_SIZE |
| |
| #ifndef PW_BOOT_HEAP_SIZE |
| #error "PW_BOOT_HEAP_SIZE is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_HEAP_SIZE |
| |
| #ifndef PW_BOOT_MIN_STACK_SIZE |
| #error "PW_BOOT_MIN_STACK_SIZE is not defined, and is required to use pw_boot_cortex_m" |
| #endif // PW_BOOT_MIN_STACK_SIZE |
| |
| |
| /* Note: This technically doesn't set the firmware's entry point. Setting the |
| * firmware entry point is done by setting vector_table[1] |
| * (Reset_Handler). However, this DOES tell the compiler how to optimize |
| * when --gc-sections is enabled. |
| */ |
| ENTRY(pw_boot_Entry) |
| |
| MEMORY |
| { |
| /* Flash Config for bootloader */ |
| FLASH_CONFIG(rx) : \ |
| ORIGIN = 0x08000400, \ |
| LENGTH = 0x00000200 |
| /* Vector Table (typically in flash) */ |
| VECTOR_TABLE(rx) : \ |
| ORIGIN = PW_BOOT_VECTOR_TABLE_BEGIN, \ |
| LENGTH = PW_BOOT_VECTOR_TABLE_SIZE |
| /* Internal Flash */ |
| FLASH(rx) : \ |
| ORIGIN = PW_BOOT_FLASH_BEGIN, \ |
| LENGTH = PW_BOOT_FLASH_SIZE |
| /* Internal SRAM */ |
| RAM(rwx) : \ |
| ORIGIN = PW_BOOT_RAM_BEGIN, \ |
| LENGTH = PW_BOOT_RAM_SIZE |
| /* USB SRAM */ |
| USB_SRAM(rw) : \ |
| ORIGIN = 0x40140000, \ |
| LENGTH = 0x00004000 |
| } |
| |
| SECTIONS |
| { |
| .flash_config : |
| { |
| . = ALIGN(4); |
| KEEP(*(.flash_conf)) |
| } >FLASH_CONFIG |
| |
| /* This is the link-time vector table. If used, the VTOR (Vector Table Offset |
| * Register) MUST point to this memory location in order to be used. This can |
| * be done by ensuring this section exists at the default location of the VTOR |
| * so it's used on reset, or by explicitly setting the VTOR in a bootloader |
| * manually to point to &pw_boot_vector_table_addr before interrupts are enabled. |
| */ |
| .vector_table : ALIGN(512) |
| { |
| pw_boot_vector_table_addr = .; |
| KEEP(*(.vector_table)) |
| } >VECTOR_TABLE |
| |
| /* Main executable code. */ |
| .code : ALIGN(8) |
| { |
| . = ALIGN(8); |
| /* Application code. */ |
| *(.text) |
| *(.text*) |
| KEEP(*(.init)) |
| KEEP(*(.fini)) |
| |
| . = ALIGN(8); |
| /* Constants.*/ |
| *(.rodata) |
| *(.rodata*) |
| |
| /* Glue ARM to Thumb code, and vice-versa */ |
| *(.glue_7) |
| *(.glue_7t) |
| |
| /* Exception handling frame */ |
| *(.eh_frame) |
| |
| /* .preinit_array, .init_array, .fini_array are used by libc. |
| * Each section is a list of function pointers that are called pre-main and |
| * post-exit for object initialization and tear-down. |
| * Since the region isn't explicitly referenced, specify KEEP to prevent |
| * link-time garbage collection. SORT is used for sections that have strict |
| * init/de-init ordering requirements. */ |
| . = ALIGN(8); |
| PROVIDE_HIDDEN(__preinit_array_start = .); |
| KEEP(*(.preinit_array*)) |
| PROVIDE_HIDDEN(__preinit_array_end = .); |
| |
| PROVIDE_HIDDEN(__init_array_start = .); |
| KEEP(*(SORT(.init_array.*))) |
| KEEP(*(.init_array*)) |
| PROVIDE_HIDDEN(__init_array_end = .); |
| |
| PROVIDE_HIDDEN(__fini_array_start = .); |
| KEEP(*(SORT(.fini_array.*))) |
| KEEP(*(.fini_array*)) |
| PROVIDE_HIDDEN(__fini_array_end = .); |
| } >FLASH |
| |
| /* Used by unwind-arm/ */ |
| .ARM : ALIGN(8) { |
| __exidx_start = .; |
| *(.ARM.exidx*) |
| __exidx_end = .; |
| } >FLASH |
| |
| /* Explicitly initialized global and static data. (.data)*/ |
| .static_init_ram : ALIGN(8) |
| { |
| *(CodeQuickAccess) |
| *(DataQuickAccess) |
| *(.data) |
| *(.data*) |
| . = ALIGN(8); |
| } >RAM AT> FLASH |
| |
| /* Zero initialized global/static data. (.bss) |
| * This section is zero initialized in pw_boot_Entry(). */ |
| .zero_init_ram : ALIGN(8) |
| { |
| *(.bss) |
| *(.bss*) |
| *(COMMON) |
| . = ALIGN(8); |
| } >RAM |
| |
| .heap : ALIGN(8) |
| { |
| pw_boot_heap_low_addr = .; |
| . = . + PW_BOOT_HEAP_SIZE; |
| . = ALIGN(8); |
| pw_boot_heap_high_addr = .; |
| } >RAM |
| |
| /* Link-time check for stack overlaps. */ |
| .stack (NOLOAD) : ALIGN(8) |
| { |
| /* Set the address that the main stack pointer should be initialized to. */ |
| pw_boot_stack_low_addr = .; |
| HIDDEN(_stack_size = ORIGIN(RAM) + LENGTH(RAM) - .); |
| /* Align the stack to a lower address to ensure it isn't out of range. */ |
| HIDDEN(_stack_high = (. + _stack_size) & ~0x7); |
| ASSERT(_stack_high - . >= PW_BOOT_MIN_STACK_SIZE, |
| "Error: Not enough RAM for desired minimum stack size."); |
| . = _stack_high; |
| pw_boot_stack_high_addr = .; |
| } >RAM |
| |
| m_usb_bdt (NOLOAD) : |
| { |
| . = ALIGN(512); |
| *(m_usb_bdt) |
| } >USB_SRAM |
| |
| m_usb_global (NOLOAD) : |
| { |
| *(m_usb_global) |
| } >USB_SRAM |
| |
| /* Discard unwind info. */ |
| .ARM.extab 0x0 (INFO) : |
| { |
| KEEP(*(.ARM.extab*)) |
| } |
| |
| .ARM.attributes 0 : { *(.ARM.attributes) } |
| } |
| |
| /* Symbols used by core_init.c: */ |
| /* Start of .static_init_ram in FLASH. */ |
| _pw_static_init_flash_start = LOADADDR(.static_init_ram); |
| |
| /* Region of .static_init_ram in RAM. */ |
| _pw_static_init_ram_start = ADDR(.static_init_ram); |
| _pw_static_init_ram_end = _pw_static_init_ram_start + SIZEOF(.static_init_ram); |
| |
| /* Region of .zero_init_ram. */ |
| _pw_zero_init_ram_start = ADDR(.zero_init_ram); |
| _pw_zero_init_ram_end = _pw_zero_init_ram_start + SIZEOF(.zero_init_ram); |
| |
| /* Size of image for bootloader header. */ |
| _pw_image_size = _pw_static_init_flash_start + (_pw_static_init_ram_end - _pw_static_init_ram_start) - pw_boot_vector_table_addr; |
| |
| /* arm-none-eabi expects `end` symbol to point to start of heap for sbrk. */ |
| PROVIDE(end = _pw_zero_init_ram_end); |