2015-04-10 16:44:37 -07:00
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/*
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* Copyright (c) 2013-2014, Wind River Systems, Inc.
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*
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2017-01-18 17:01:01 -08:00
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* SPDX-License-Identifier: Apache-2.0
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2015-04-10 16:44:37 -07:00
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*/
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/*
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2015-10-20 09:42:33 -07:00
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* DESCRIPTION
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* Platform independent, commonly used macros and defines related to linker
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* script.
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*
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* This file may be included by:
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* - Linker script files: for linker section declarations
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* - C files: for external declaration of address or size of linker section
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* - Assembly files: for external declaration of address or size of linker
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* section
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2015-07-01 17:22:39 -04:00
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*/
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2015-04-10 16:44:37 -07:00
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#ifndef _LINKERDEFS_H
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#define _LINKERDEFS_H
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#include <toolchain.h>
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2017-06-17 11:30:47 -04:00
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#include <linker/sections.h>
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2017-10-31 09:30:38 -04:00
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#include <misc/util.h>
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2015-04-10 16:44:37 -07:00
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/* include platform dependent linker-defs */
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2015-10-09 06:20:52 -04:00
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#ifdef CONFIG_X86
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2016-10-21 09:29:09 -07:00
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/* Nothing yet to include */
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2015-06-05 22:27:08 -04:00
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#elif defined(CONFIG_ARM)
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2015-04-10 16:44:37 -07:00
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/* Nothing yet to include */
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2015-06-05 22:27:49 -04:00
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#elif defined(CONFIG_ARC)
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2015-04-10 16:44:37 -07:00
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/* Nothing yet to include */
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2016-04-21 14:47:09 -07:00
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#elif defined(CONFIG_NIOS2)
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/* Nothing yet to include */
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arch: added support for the riscv32 architecture
RISC-V is an open-source instruction set architecture.
Added support for the 32bit version of RISC-V to Zephyr.
1) exceptions/interrupts/faults are handled at the architecture
level via the __irq_wrapper handler. Context saving/restoring
of registers can be handled at both architecture and SOC levels.
If SOC-specific registers need to be saved, SOC level needs to
provide __soc_save_context and __soc_restore_context functions
that shall be accounted by the architecture level, when
corresponding config variable RISCV_SOC_CONTEXT_SAVE is set.
2) As RISC-V architecture does not provide a clear ISA specification
about interrupt handling, each RISC-V SOC handles it in its own
way. Hence, at the architecture level, the __irq_wrapper handler
expects the following functions to be provided by the SOC level:
__soc_is_irq: to check if the exception is the result of an
interrupt or not.
__soc_handle_irq: handle pending IRQ at SOC level (ex: clear
pending IRQ in SOC-specific IRQ register)
3) Thread/task scheduling, as well as IRQ offloading are handled via
the RISC-V system call ("ecall"), which is also handled via the
__irq_wrapper handler. The _Swap asm function just calls "ecall"
to generate an exception.
4) As there is no conventional way of handling CPU power save in
RISC-V, the default nano_cpu_idle and nano_cpu_atomic_idle
functions just unlock interrupts and return to the caller, without
issuing any CPU power saving instruction. Nonetheless, to allow
SOC-level to implement proper CPU power save, nano_cpu_idle and
nano_cpu_atomic_idle functions are defined as __weak
at the architecture level.
Change-Id: I980a161d0009f3f404ad22b226a6229fbb492389
Signed-off-by: Jean-Paul Etienne <fractalclone@gmail.com>
2017-01-11 00:24:30 +01:00
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#elif defined(CONFIG_RISCV32)
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/* Nothing yet to include */
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2017-01-25 22:26:58 +01:00
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#elif defined(CONFIG_XTENSA)
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/* Nothing yet to include */
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2017-10-03 16:31:55 +02:00
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#elif defined(CONFIG_ARCH_POSIX)
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/* Nothing yet to include */
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2015-04-10 16:44:37 -07:00
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#else
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#error Arch not supported.
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#endif
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#ifdef _LINKER
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2015-10-14 11:17:20 -04:00
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2016-04-08 12:38:57 -07:00
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/*
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* Space for storing per device busy bitmap. Since we do not know beforehand
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* the number of devices, we go through the below mechanism to allocate the
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* required space.
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*/
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#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
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2016-11-08 10:36:50 -05:00
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#define DEVICE_COUNT \
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((__device_init_end - __device_init_start) / _DEVICE_STRUCT_SIZE)
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2016-04-08 12:38:57 -07:00
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#define DEV_BUSY_SZ (((DEVICE_COUNT + 31) / 32) * 4)
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#define DEVICE_BUSY_BITFIELD() \
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FILL(0x00) ; \
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__device_busy_start = .; \
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. = . + DEV_BUSY_SZ; \
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__device_busy_end = .;
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#else
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#define DEVICE_BUSY_BITFIELD()
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#endif
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2015-10-14 11:17:20 -04:00
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/*
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* generate a symbol to mark the start of the device initialization objects for
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* the specified level, then link all of those objects (sorted by priority);
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* ensure the objects aren't discarded if there is no direct reference to them
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*/
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#define DEVICE_INIT_LEVEL(level) \
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__device_##level##_start = .; \
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KEEP(*(SORT(.init_##level[0-9]))); \
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KEEP(*(SORT(.init_##level[1-9][0-9]))); \
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/*
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* link in device initialization objects for all devices that are automatically
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* initialized by the kernel; the objects are sorted in the order they will be
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* initialized (i.e. ordered by level, sorted by priority within a level)
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*/
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#define DEVICE_INIT_SECTIONS() \
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2016-11-08 11:06:55 -08:00
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__device_init_start = .; \
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DEVICE_INIT_LEVEL(PRE_KERNEL_1) \
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DEVICE_INIT_LEVEL(PRE_KERNEL_2) \
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DEVICE_INIT_LEVEL(POST_KERNEL) \
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DEVICE_INIT_LEVEL(APPLICATION) \
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2016-04-08 12:38:57 -07:00
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__device_init_end = .; \
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DEVICE_BUSY_BITFIELD() \
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2015-10-14 11:17:20 -04:00
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2015-10-26 15:40:46 -04:00
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/* define a section for undefined device initialization levels */
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#define DEVICE_INIT_UNDEFINED_SECTION() \
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KEEP(*(SORT(.init_[_A-Z0-9]*))) \
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2016-07-31 16:16:29 +03:00
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/*
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* link in shell initialization objects for all modules that use shell and
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* their shell commands are automatically initialized by the kernel.
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*/
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2018-01-15 11:10:09 -05:00
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#define SHELL_INIT_SECTIONS() \
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__shell_module_start = .; \
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KEEP(*(".shell_module_*")); \
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2018-01-15 11:15:47 -05:00
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__shell_module_end = .; \
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__shell_cmd_start = .; \
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KEEP(*(".shell_cmd_*")); \
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__shell_cmd_end = .; \
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2016-07-31 16:16:29 +03:00
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2017-06-19 10:20:41 -07:00
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#ifdef CONFIG_APPLICATION_MEMORY
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2017-10-31 09:30:38 -04:00
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#ifndef NUM_KERNEL_OBJECT_FILES
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#error "Expected NUM_KERNEL_OBJECT_FILES to be defined"
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2018-04-04 17:20:09 +05:30
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#elif NUM_KERNEL_OBJECT_FILES > 32
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#error "Max supported kernel objects is 32."
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2017-10-31 09:30:38 -04:00
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/* TODO: Using the preprocessor to do this was a mistake. Rewrite to
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scale better. e.g. by aggregating the kernel objects into two
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archives like KBuild did.*/
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#endif
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2018-01-02 15:54:16 +01:00
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#define X(i, j) KERNEL_OBJECT_FILE_##i (j)
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#define Y(i, j) KERNEL_OBJECT_FILE_##i
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2017-10-31 09:30:38 -04:00
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#define KERNEL_INPUT_SECTION(sect) \
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UTIL_LISTIFY(NUM_KERNEL_OBJECT_FILES, X, sect)
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2017-08-01 14:43:24 -07:00
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#define APP_INPUT_SECTION(sect) \
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2017-10-31 09:30:38 -04:00
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*(EXCLUDE_FILE (UTIL_LISTIFY(NUM_KERNEL_OBJECT_FILES, Y, ~)) sect)
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2017-06-19 10:20:41 -07:00
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#else
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#define KERNEL_INPUT_SECTION(sect) *(sect)
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#define APP_INPUT_SECTION(sect) *(sect)
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#endif
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2016-07-31 16:16:29 +03:00
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2015-10-09 06:20:52 -04:00
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#ifdef CONFIG_X86 /* LINKER FILES: defines used by linker script */
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2015-04-10 16:44:37 -07:00
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/* Should be moved to linker-common-defs.h */
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#if defined(CONFIG_XIP)
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#define ROMABLE_REGION ROM
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#else
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#define ROMABLE_REGION RAM
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#endif
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#endif
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/*
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* If image is loaded via kexec Linux system call, then program
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* headers need to be page aligned.
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* This can be done by section page aligning.
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*/
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#ifdef CONFIG_BOOTLOADER_KEXEC
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#define KEXEC_PGALIGN_PAD(x) . = ALIGN(x);
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#else
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#define KEXEC_PGALIGN_PAD(x)
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#endif
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#elif defined(_ASMLANGUAGE)
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2015-10-14 11:17:20 -04:00
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2015-04-10 16:44:37 -07:00
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/* Assembly FILES: declaration defined by the linker script */
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GDATA(__bss_start)
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GDATA(__bss_num_words)
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#ifdef CONFIG_XIP
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GDATA(__data_rom_start)
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GDATA(__data_ram_start)
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GDATA(__data_num_words)
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#endif
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2015-10-14 11:17:20 -04:00
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#else /* ! _ASMLANGUAGE */
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2015-04-10 16:44:37 -07:00
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Introduce new sized integer typedefs
This is a start to move away from the C99 {u}int{8,16,32,64}_t types to
Zephyr defined u{8,16,32,64}_t and s{8,16,32,64}_t. This allows Zephyr
to define the sized types in a consistent manor across all the
architectures we support and not conflict with what various compilers
and libc might do with regards to the C99 types.
We introduce <zephyr/types.h> as part of this and have it include
<stdint.h> for now until we transition all the code away from the C99
types.
We go with u{8,16,32,64}_t and s{8,16,32,64}_t as there are some
existing variables defined u8 & u16 as well as to be consistent with
Zephyr naming conventions.
Jira: ZEP-2051
Change-Id: I451fed0623b029d65866622e478225dfab2c0ca8
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
2017-04-19 10:32:08 -05:00
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#include <zephyr/types.h>
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2017-06-14 13:31:11 -07:00
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2017-06-19 11:13:19 -07:00
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#ifdef CONFIG_APPLICATION_MEMORY
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2017-08-01 15:13:44 -07:00
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/* Memory owned by the application. Start and end will be aligned for memory
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* management/protection hardware for the target architecture.
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* The policy for this memory will be to configure all of it as user thread
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* accessible. It consists of all non-kernel globals.
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*/
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2017-06-19 11:13:19 -07:00
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extern char __app_ram_start[];
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extern char __app_ram_end[];
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2017-08-01 15:13:44 -07:00
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extern char __app_ram_size[];
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2017-06-19 11:13:19 -07:00
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#endif
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2017-08-01 15:13:44 -07:00
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/* Memory owned by the kernel. Start and end will be aligned for memory
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* management/protection hardware for the target architecture..
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*
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* Consists of all kernel-side globals, all kernel objects, all thread stacks,
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* and all currently unused RAM. If CONFIG_APPLICATION_MEMORY is not enabled,
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* has all globals, not just kernel side.
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*
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* Except for the stack of the currently executing thread, none of this memory
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* is normally accessible to user threads unless specifically granted at
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* runtime.
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*/
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2017-06-19 11:13:19 -07:00
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extern char __kernel_ram_start[];
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extern char __kernel_ram_end[];
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2017-08-01 15:13:44 -07:00
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extern char __kernel_ram_size[];
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2017-06-19 11:13:19 -07:00
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2017-06-14 13:31:11 -07:00
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/* Used by _bss_zero or arch-specific implementation */
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2015-04-10 16:44:37 -07:00
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extern char __bss_start[];
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2016-06-30 16:45:08 -07:00
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extern char __bss_end[];
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2017-06-19 11:13:19 -07:00
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#ifdef CONFIG_APPLICATION_MEMORY
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extern char __app_bss_start[];
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extern char __app_bss_end[];
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#endif
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2017-06-14 13:31:11 -07:00
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/* Used by _data_copy() or arch-specific implementation */
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2015-04-10 16:44:37 -07:00
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#ifdef CONFIG_XIP
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extern char __data_rom_start[];
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extern char __data_ram_start[];
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2016-06-30 16:45:08 -07:00
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extern char __data_ram_end[];
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2017-06-19 11:13:19 -07:00
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#ifdef CONFIG_APPLICATION_MEMORY
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extern char __app_data_rom_start[];
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extern char __app_data_ram_start[];
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extern char __app_data_ram_end[];
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#endif /* CONFIG_APPLICATION_MEMORY */
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#endif /* CONFIG_XIP */
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2015-04-10 16:44:37 -07:00
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2017-07-11 08:58:43 -07:00
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/* Includes text and rodata */
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2015-09-16 19:14:40 -04:00
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extern char _image_rom_start[];
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extern char _image_rom_end[];
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2017-07-11 08:58:43 -07:00
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extern char _image_rom_size[];
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/* datas, bss, noinit */
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2015-09-16 19:14:40 -04:00
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extern char _image_ram_start[];
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extern char _image_ram_end[];
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2017-07-11 08:58:43 -07:00
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2015-09-21 17:57:39 -04:00
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extern char _image_text_start[];
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extern char _image_text_end[];
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2015-09-16 19:14:40 -04:00
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2017-07-11 08:58:43 -07:00
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extern char _image_rodata_start[];
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extern char _image_rodata_end[];
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2017-06-23 11:02:50 +08:00
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extern char _vector_start[];
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extern char _vector_end[];
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2017-06-14 13:31:11 -07:00
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/* end address of image, used by newlib for the heap */
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2015-04-10 16:44:37 -07:00
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extern char _end[];
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2017-10-05 01:20:21 +02:00
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#ifdef CONFIG_CCM_BASE_ADDRESS
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extern char __ccm_data_rom_start[];
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extern char __ccm_start[];
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extern char __ccm_data_start[];
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extern char __ccm_data_end[];
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extern char __ccm_bss_start[];
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extern char __ccm_bss_end[];
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extern char __ccm_noinit_start[];
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extern char __ccm_noinit_end[];
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extern char __ccm_end[];
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#endif /* CONFIG_CCM_BASE_ADDRESS */
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2015-04-10 16:44:37 -07:00
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#endif /* ! _ASMLANGUAGE */
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#endif /* _LINKERDEFS_H */
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