blob: 052e9f220267c4bc2f477db868a98cd60666fdd2 [file] [log] [blame]
/*
* Copyright (c) 2020 ITE Corporation. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <soc.h>
#include <zephyr/devicetree.h>
#include <zephyr/linker/sections.h>
#include <zephyr/linker/devicetree_regions.h>
#include <zephyr/linker/linker-defs.h>
#include <zephyr/linker/linker-tool.h>
#ifdef CONFIG_XIP
#define ROMABLE_REGION ROM
#else
#define ROMABLE_REGION RAM
#endif
#define RAMABLE_REGION RAM
#define _EXCEPTION_SECTION_NAME exceptions
#define _RESET_SECTION_NAME reset
#ifdef CONFIG_XIP
#if DT_NODE_HAS_COMPAT_STATUS(DT_CHOSEN(zephyr_flash), soc_nv_flash, okay)
#ifdef CONFIG_FLASH_LOAD_OFFSET
#define ROM_BASE (DT_REG_ADDR(DT_CHOSEN(zephyr_flash)) + \
CONFIG_FLASH_LOAD_OFFSET)
#else /* !CONFIG_FLASH_LOAD_OFFSET */
#define ROM_BASE DT_REG_ADDR(DT_CHOSEN(zephyr_flash))
#endif /* CONFIG_FLASH_LOAD_OFFSET */
#define ROM_SIZE DT_REG_SIZE(DT_CHOSEN(zephyr_flash))
#elif DT_NODE_HAS_COMPAT(DT_CHOSEN(zephyr_flash), jedec_spi_nor)
/* For jedec,spi-nor we expect the spi controller to memory map the flash
* and for that mapping to be the second register property of the spi
* controller.
*/
#define SPI_CTRL DT_PARENT(DT_CHOSEN(zephyr_flash))
#define ROM_BASE DT_REG_ADDR_BY_IDX(SPI_CTRL, 1)
#define ROM_SIZE DT_REG_SIZE_BY_IDX(SPI_CTRL, 1)
#endif
#else /* CONFIG_XIP */
#define ROM_BASE CONFIG_SRAM_BASE_ADDRESS
#define ROM_SIZE KB(CONFIG_SRAM_SIZE)
#endif /* CONFIG_XIP */
#define RAM_BASE CONFIG_SRAM_BASE_ADDRESS
#define RAM_SIZE KB(CONFIG_SRAM_SIZE)
#ifdef CONFIG_RISCV_PMP
#define MPU_MIN_SIZE 4
#define MPU_MIN_SIZE_ALIGN . = ALIGN(MPU_MIN_SIZE);
#if defined(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT)
#define MPU_ALIGN(region_size) \
. = ALIGN(MPU_MIN_SIZE); \
. = ALIGN( 1 << LOG2CEIL(region_size))
#else
#define MPU_ALIGN(region_size) \
. = ALIGN(MPU_MIN_SIZE)
#endif
#else
#define MPU_MIN_SIZE_ALIGN
#define MPU_ALIGN(region_size) . = ALIGN(4)
#endif
MEMORY
{
#ifdef CONFIG_XIP
ROM (rx) : ORIGIN = ROM_BASE, LENGTH = ROM_SIZE
#endif
RAM (rwx) : ORIGIN = RAM_BASE, LENGTH = RAM_SIZE
LINKER_DT_REGIONS()
/* Used by and documented in include/linker/intlist.ld */
IDT_LIST (wx) : ORIGIN = 0xFFFFF7FF, LENGTH = 2K
}
ENTRY(CONFIG_KERNEL_ENTRY)
SECTIONS
{
#include <zephyr/linker/rel-sections.ld>
/*
* The .plt and .iplt are here according to
* 'riscv32-zephyr-elf-ld --verbose', before text section.
*/
SECTION_PROLOGUE(.plt,,)
{
*(.plt)
}
SECTION_PROLOGUE(.iplt,,)
{
*(.iplt)
}
GROUP_START(ROMABLE_REGION)
__rom_region_start = ROM_BASE;
SECTION_PROLOGUE(rom_start,,)
{
. = ALIGN(16);
/* Located in generated directory. This file is populated by calling
* zephyr_linker_sources(ROM_START ...).
*/
#include <snippets-rom-start.ld>
} GROUP_LINK_IN(ROMABLE_REGION)
#ifdef CONFIG_CODE_DATA_RELOCATION
#include <linker_relocate.ld>
#endif
SECTION_PROLOGUE(_RESET_SECTION_NAME,,)
{
KEEP(*(.reset.*))
} GROUP_LINK_IN(ROMABLE_REGION)
#ifndef CONFIG_SOC_IT8XXX2_EXCEPTIONS_IN_RAM
SECTION_PROLOGUE(_EXCEPTION_SECTION_NAME,,)
{
KEEP(*(".exception.entry.*"))
*(".exception.other.*")
} GROUP_LINK_IN(ROMABLE_REGION)
#endif
SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
{
. = ALIGN(4);
KEEP(*(.openocd_debug))
KEEP(*(".openocd_debug.*"))
__text_region_start = .;
*(.text)
*(".text.*")
*(.gnu.linkonce.t.*)
#include <zephyr/linker/kobject-text.ld>
/* IT8xxx2 requires memory mappings be configured for execution
* out of RAM, which refer to contiguous blocks of RAM. Place
* all relevant sections together to minimize RAM waste. */
. = ALIGN(0x1000);
/* Mapping base address must be 4k-aligned */
__ilm_flash_start = .;
/* Specially-tagged functions in SoC sources */
KEEP(*(.__ram_code))
*(.__ram_code.*)
#ifdef CONFIG_SOC_IT8XXX2_EXCEPTIONS_IN_RAM
KEEP(*(".exception.entry.*"))
*(".exception.other.*")
#endif
__ilm_flash_end = .;
/* ILM mapping is always a multiple of 4k size; ensure following
* sections won't incorrectly redirect to RAM. */
. = ALIGN(0x1000);
} GROUP_LINK_IN(ROMABLE_REGION)
__text_region_end = .;
__rodata_region_start = .;
#include <zephyr/linker/common-rom.ld>
#include <zephyr/linker/thread-local-storage.ld>
SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)
{
. = ALIGN(4);
*(.srodata)
*(".srodata.*")
*(.rodata)
*(".rodata.*")
*(.gnu.linkonce.r.*)
*(.sdata2 .sdata2.* .gnu.linkonce.s2.*)
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/
#include <snippets-rodata.ld>
#include <zephyr/linker/kobject-rom.ld>
. = ALIGN(4);
} GROUP_LINK_IN(ROMABLE_REGION)
#include <zephyr/linker/cplusplus-rom.ld>
__rodata_region_end = .;
/* For non-XIP system, __rom_region_end symbol should be set to
* the end of common ROMABLE_REGIONs (text and rodata) instead of
* the linker script end, so it wouldn't mistakenly contain
* RAMABLE_REGION in it.
*/
#ifndef CONFIG_XIP
#ifdef CONFIG_RISCV_PMP
SECTION_PROLOGUE(rom_mpu_padding,,)
{
MPU_ALIGN(__rodata_region_end - __rom_region_start);
#ifdef CONFIG_QEMU_TARGET
/*
* QEMU doesn't vet each instruction fetch individually.
* Instead, it grabs a whole page and perform dynamic
* transation on it in a batch. It therefore validates
* PMP permissions using page-sized and -aligned chunks.
*/
. = ALIGN(0x1000);
#endif
} GROUP_LINK_IN(ROMABLE_REGION)
#endif /* CONFIG_RISCV_PMP */
__rom_region_end = .;
__rom_region_size = __rom_region_end - __rom_region_start;
#endif /* CONFIG_XIP */
GROUP_END(ROMABLE_REGION)
GROUP_START(RAMABLE_REGION)
. = RAM_BASE;
/* Claim RAM for ILM mappings; must be 4k-aligned and each mapping is 4k in
* size, but mapped regions can still be accessed as data so don't need to be
* padded out to 4k size. This doesn't load any sections because code in ILM
* is still accessed at its VMA in ROM. */
SECTION_PROLOGUE(ilm_ram,(NOLOAD),ALIGN(0x1000))
{
__ilm_ram_start = .;
. += __ilm_flash_end - __ilm_flash_start;
__ilm_ram_end = .;
} GROUP_LINK_IN(RAMABLE_REGION)
_image_ram_start = .;
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/
#include <snippets-ram-sections.ld>
#if defined(CONFIG_USERSPACE)
#define APP_SHARED_ALIGN MPU_MIN_SIZE_ALIGN
#define SMEM_PARTITION_ALIGN MPU_ALIGN
#include <app_smem.ld>
_app_smem_size = _app_smem_end - _app_smem_start;
_app_smem_rom_start = LOADADDR(_APP_SMEM_SECTION_NAME);
#endif /* CONFIG_USERSPACE */
SECTION_DATA_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),)
{
MPU_MIN_SIZE_ALIGN
/*
* For performance, BSS section is assumed to be 4 byte aligned and
* a multiple of 4 bytes
*/
. = ALIGN(4);
__bss_start = .;
__kernel_ram_start = .;
*(.sbss)
*(".sbss.*")
*(.bss)
*(".bss.*")
COMMON_SYMBOLS
#ifdef CONFIG_CODE_DATA_RELOCATION
#include <linker_sram_bss_relocate.ld>
#endif
/*
* 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_DATA_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
#include <zephyr/linker/common-noinit.ld>
SECTION_DATA_PROLOGUE(_DATA_SECTION_NAME,,)
{
. = ALIGN(4);
/* _image_ram_start = .; */
__data_region_start = .;
__data_start = .;
*(.data)
*(".data.*")
#ifdef CONFIG_RISCV_GP
/*
* RISC-V architecture has 12-bit signed immediate offsets in the
* instructions. If we can put the most commonly accessed globals
* in a special 4K 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 0x800 past the
* beginning of .sdata so that we can use both positive and negative
* offsets.
*/
. = ALIGN(8);
PROVIDE (__global_pointer$ = . + 0x800);
#endif
*(.sdata .sdata.* .gnu.linkonce.s.*)
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/
#include <snippets-rwdata.ld>
#ifdef CONFIG_CODE_DATA_RELOCATION
#include <linker_sram_data_relocate.ld>
#endif
__data_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
__data_size = __data_end - __data_start;
__data_load_start = LOADADDR(_DATA_SECTION_NAME);
__data_region_load_start = LOADADDR(_DATA_SECTION_NAME);
#include <zephyr/linker/common-ram.ld>
#include <zephyr/linker/kobject-data.ld>
#include <zephyr/linker/cplusplus-ram.ld>
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/
#include <snippets-data-sections.ld>
__data_region_end = .;
MPU_MIN_SIZE_ALIGN
_image_ram_end = .;
_end = .; /* end of image */
__kernel_ram_end = .;
__kernel_ram_size = __kernel_ram_end - __kernel_ram_start;
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/
#include <snippets-sections.ld>
GROUP_END(RAMABLE_REGION)
#include <zephyr/linker/debug-sections.ld>
/DISCARD/ : { *(.note.GNU-stack) }
SECTION_PROLOGUE(.riscv.attributes, 0,)
{
KEEP(*(.riscv.attributes))
KEEP(*(.gnu.attributes))
}
/* Sections generated from 'zephyr,memory-region' nodes */
LINKER_DT_SECTIONS()
/* Because ROMABLE_REGION != RAMABLE_REGION in XIP-system, it is valid
* to set __rom_region_end symbol at the end of linker script and
* doesn't mistakenly contain the RAMABLE_REGION in it.
*/
#ifdef CONFIG_XIP
/* Must be last in romable region */
SECTION_PROLOGUE(.last_section,(NOLOAD),)
{
} GROUP_LINK_IN(ROMABLE_REGION)
/* To provide the image size as a const expression,
* calculate this value here. */
__rom_region_end = LOADADDR(.last_section);
__rom_region_size = __rom_region_end - __rom_region_start;
#endif
}