Kari Argillander
369da70f2a
* format: Strip trailing whitespaces
We want to get rid of trailing whitespaces completly as they make just git
noice. Much better to start using automated tools to get rid of them once and
not getting them back again. This way git history will be cleaner and review
easier.
Commit was generated with:
pre-commit run --all-files trailing-whitespace
* format: Files should have exactly one new line end of them
It is good practice that every file has one new line. It is not now days so
mandatory but it also is not nice if file has lot of newlines end of it. We will
use pre-commit which takes automatically care about this so let's fix all.
Commit was generated with:
pre-commit run --all-files end-of-file-fixer
* format: Convert tabs to spaces
Project mostly use spaces over tabs. When mixing tabs and spaces this usually
makes formatting issues and also when changing those in commits it will make lot
of git noise. We will force spaces most of the time and use pre-commit to fix.
Commit was generated with:
pre-commit run --all-files remove-tabs
---------
Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>
156 lines
14 KiB
Plaintext
156 lines
14 KiB
Plaintext
/* ****************************************************************************************************** */
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/* LINKER SCRIPT */
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/* */
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/* */
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/* The Linker Script defines how the code and data emitted by the GNU C compiler and assembler are */
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/* to be loaded into memory (code goes into FLASH, variables go into RAM). */
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/* */
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/* Any symbols defined in the Linker Script are automatically global and available to the rest of the */
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/* program. */
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/* */
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/* To force the linker to use this LINKER SCRIPT, just add the -T AT91SAM7S256.LD */
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/* directive to the linker flags in the makefile. For example, */
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/* */
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/* LFLAGS = -Map main.map -nostartfiles -T AT91SAM7S256.LD */
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/* */
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/* */
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/* The order that the object files are listed in the makefile determines what .text section is */
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/* placed first. */
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/* */
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/* For example: $(LD) $(LFLAGS) -o main.out crt.o main.o lowlevelinit.o */
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/* */
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/* crt.o is first in the list of objects, so it will be placed at address 0x00000000 */
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/* */
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/* */
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/* The top of the stack (_stack_end) is (last_byte_of_ram +1) - 4 */
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/* */
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/* Therefore: _stack_end = (0x00020FFFF + 1) - 4 = 0x00210000 - 4 = 0x0020FFFC */
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/* Therefore: _stack_end = (0x000203FFF + 1) - 4 = 0x00204000 - 4 = 0x00203FFC */
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/* */
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/* Note that this symbol (_stack_end) is automatically GLOBAL and will be used by the crt.s */
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/* startup assembler routine to specify all stacks for the various ARM modes */
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/* */
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/* MEMORY MAP */
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/* | | */
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/* .-------->|---------------------------------|0x00210000 */
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/* . | |0x0020FFFC <---------- _stack_end */
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/* . | UDF Stack 16 bytes | */
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/* . | | */
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/* . |---------------------------------|0x0020FFEC */
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/* . | | */
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/* . | ABT Stack 16 bytes | */
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/* . | | */
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/* . |---------------------------------|0x0020FFDC */
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/* . | | */
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/* . | | */
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/* . | FIQ Stack 128 bytes | */
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/* . | | */
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/* . | | */
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/* RAM |---------------------------------|0x0020FF5C */
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/* . | | */
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/* . | | */
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/* . | IRQ Stack 128 bytes | */
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/* . | | */
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/* . | | */
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/* . |---------------------------------|0x0020FEDC */
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/* . | | */
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/* . | SVC Stack 16 bytes | */
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/* . | | */
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/* . |---------------------------------|0x0020FECC */
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/* . | | */
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/* . | stack area for user program | */
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/* . | | */
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/* . | | */
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/* . | | */
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/* . | free ram | */
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/* . | | */
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/* . |.................................|0x002006D8 <---------- _bss_end */
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/* . | | */
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/* . | .bss uninitialized variables | */
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/* . |.................................|0x002006D0 <---------- _bss_start, _edata */
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/* . | | */
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/* . | .data initialized variables | */
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/* . | | */
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/* .-------->|_________________________________|0x00200000 */
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/* */
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/* */
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/* .-------->|---------------------------------|0x00100000 */
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/* . | | */
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/* . | | */
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/* . | free flash | */
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/* . | | */
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/* . | | */
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/* . |.................................|0x000006D0 <---------- _bss_start, _edata */
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/* . | | */
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/* . | .data initialized variables | */
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/* . | | */
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/* . |---------------------------------|0x000006C4 <----------- _etext */
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/* . | | */
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/* . | C code | */
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/* . | | */
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/* . | | */
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/* . |---------------------------------|0x00000118 main() */
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/* . | | */
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/* . | Startup Code (crt.s) | */
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/* . | (assembler) | */
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/* . | | */
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/* . |---------------------------------|0x00000020 */
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/* . | | */
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/* . | Interrupt Vector Table | */
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/* . | 32 bytes | */
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/* .-------->|---------------------------------|0x00000000 _vec_reset */
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/* */
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/* */
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/* Author: James P. Lynch May 12, 2007 */
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/* */
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/* ****************************************************************************************************** */
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/* identify the Entry Point (_vec_reset is defined in file crt.s) */
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ENTRY(_vec_reset)
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/* specify the AT91SAM7S64 memory areas */
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MEMORY
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{
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flash : ORIGIN = 0, LENGTH = 64K /* FLASH EPROM */
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ram : ORIGIN = 0x00200000, LENGTH = 16K /* static RAM area */
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}
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/* define a global symbol _stack_end (see analysis in annotation above) */
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/*_stack_end = 0x20FFFC;*/
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_stack_end = 0x203FFC;
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/* now define the output sections */
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SECTIONS
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{
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. = 0; /* set location counter to address zero */
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.text : /* collect all sections that should go into FLASH after startup */
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{
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*(.text*) /* all .text sections (code) */
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*(.rodata) /* all .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* all .rodata* sections (constants, strings, etc.) */
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*(.glue_7) /* all .glue_7 sections (no idea what these are) */
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*(.glue_7t) /* all .glue_7t sections (no idea what these are) */
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_etext = .; /* define a global symbol _etext just after the last code byte */
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} >flash /* put all the above into FLASH */
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.data : /* collect all initialized .data sections that go into RAM */
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{
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_data = .; /* create a global symbol marking the start of the .data section */
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*(.data*) /* all .data sections */
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_edata = .; /* define a global symbol marking the end of the .data section */
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} >ram AT >flash /* put all the above into RAM (but load the LMA initializer copy into FLASH) */
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.bss : /* collect all uninitialized .bss sections that go into RAM */
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{
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_bss_start = .; /* define a global symbol marking the start of the .bss section */
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*(.bss*) /* all .bss sections */
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} >ram /* put all the above in RAM (it will be cleared in the startup code */
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. = ALIGN(4); /* advance location counter to the next 32-bit boundary */
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_bss_end = . ; /* define a global symbol marking the end of the .bss section */
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}
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_end = .; /* define a global symbol marking the end of application RAM */
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