mirror of
https://github.com/hrvach/deskhop.git
synced 2024-11-07 08:24:33 +01:00
1415c1d31a
- Single unified firmware binary - Improved support for NKRO keyboards - Report mode default for keyboard port - Improved consumer control parser for variable data types (media keys should be better supported) - System control forwarding - Improved HID parser - Web UI to configure instead of keyboard shortcuts - Firmware upgrade while the device remains functional - Only one end will need upgrade, the other will get it automatically - No need to recompile to set most settings - Improved UART routines to use DMA, more reliable link - Fixed a bunch of bugs and issues
315 lines
8.5 KiB
Plaintext
315 lines
8.5 KiB
Plaintext
/* Based on GCC ARM embedded samples.
|
|
Defines the following symbols for use by code:
|
|
__exidx_start
|
|
__exidx_end
|
|
__etext
|
|
__data_start__
|
|
__preinit_array_start
|
|
__preinit_array_end
|
|
__init_array_start
|
|
__init_array_end
|
|
__fini_array_start
|
|
__fini_array_end
|
|
__data_end__
|
|
__bss_start__
|
|
__bss_end__
|
|
__end__
|
|
end
|
|
__HeapLimit
|
|
__StackLimit
|
|
__StackTop
|
|
__stack (== StackTop)
|
|
*/
|
|
|
|
/* Total image is 256 kB, consisting of:
|
|
Executable = 188 kB
|
|
FAT disk image = 64 kB
|
|
Firmware metadata = 4 kB (contains checksum)
|
|
*/
|
|
|
|
__FLASH_LEN = 188k;
|
|
__DISK_IMAGE_LEN = 64k;
|
|
__METADATA_LEN = 4k;
|
|
__TOTAL_IMAGE_LENGTH = 256k;
|
|
|
|
__CONFIG_STORAGE_LEN = 4k;
|
|
|
|
MEMORY
|
|
{
|
|
FLASH(rx) : ORIGIN = 0x10000000, LENGTH = __FLASH_LEN
|
|
DISK_IMAGE(rw) : ORIGIN = 0x10000000 + __FLASH_LEN, LENGTH = __DISK_IMAGE_LEN
|
|
FW_METADATA(rw) : ORIGIN = 0x10000000 + (__TOTAL_IMAGE_LENGTH - __METADATA_LEN), LENGTH = __METADATA_LEN
|
|
FW_STAGING(rw) : ORIGIN = 0x10000000 + __TOTAL_IMAGE_LENGTH, LENGTH = __TOTAL_IMAGE_LENGTH
|
|
|
|
FLASH_CONFIG(rw) : ORIGIN = 0x10000000 + (2048k - __CONFIG_STORAGE_LEN), LENGTH = __CONFIG_STORAGE_LEN
|
|
RAM(rwx) : ORIGIN = 0x20000000, LENGTH = 256k
|
|
SCRATCH_X(rwx) : ORIGIN = 0x20040000, LENGTH = 4k
|
|
SCRATCH_Y(rwx) : ORIGIN = 0x20041000, LENGTH = 4k
|
|
}
|
|
PROVIDE(_staging_metadata = ORIGIN(FW_STAGING) + (__TOTAL_IMAGE_LENGTH - __METADATA_LEN));
|
|
PROVIDE(_firmware_metadata = ORIGIN(FW_METADATA));
|
|
|
|
ENTRY(_entry_point)
|
|
|
|
SECTIONS
|
|
{
|
|
/* Second stage bootloader is prepended to the image. It must be 256 bytes big
|
|
and checksummed. It is usually built by the boot_stage2 target
|
|
in the Raspberry Pi Pico SDK
|
|
*/
|
|
|
|
.flash_begin : {
|
|
ADDR_FW_RUNNING = .;
|
|
__flash_binary_start = .;
|
|
} > FLASH
|
|
|
|
.boot2 : {
|
|
__boot2_start__ = .;
|
|
KEEP (*(.boot2))
|
|
__boot2_end__ = .;
|
|
} > FLASH
|
|
|
|
ASSERT(__boot2_end__ - __boot2_start__ == 256,
|
|
"ERROR: Pico second stage bootloader must be 256 bytes in size")
|
|
|
|
/* The second stage will always enter the image at the start of .text.
|
|
The debugger will use the ELF entry point, which is the _entry_point
|
|
symbol if present, otherwise defaults to start of .text.
|
|
This can be used to transfer control back to the bootrom on debugger
|
|
launches only, to perform proper flash setup.
|
|
*/
|
|
|
|
.flashtext : {
|
|
__logical_binary_start = .;
|
|
KEEP (*(.vectors))
|
|
KEEP (*(.binary_info_header))
|
|
__binary_info_header_end = .;
|
|
KEEP (*(.reset))
|
|
}
|
|
|
|
.rodata : {
|
|
/* segments not marked as .flashdata are instead pulled into .data (in RAM) to avoid accidental flash accesses */
|
|
*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.flashdata*)))
|
|
. = ALIGN(4);
|
|
} > FLASH
|
|
|
|
.ARM.extab :
|
|
{
|
|
*(.ARM.extab* .gnu.linkonce.armextab.*)
|
|
} > FLASH
|
|
|
|
__exidx_start = .;
|
|
.ARM.exidx :
|
|
{
|
|
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
|
|
} > FLASH
|
|
__exidx_end = .;
|
|
|
|
/* Machine inspectable binary information */
|
|
. = ALIGN(4);
|
|
__binary_info_start = .;
|
|
.binary_info :
|
|
{
|
|
KEEP(*(.binary_info.keep.*))
|
|
*(.binary_info.*)
|
|
} > FLASH
|
|
__binary_info_end = .;
|
|
. = ALIGN(4);
|
|
|
|
/* Vector table goes first in RAM, to avoid large alignment hole */
|
|
.ram_vector_table (NOLOAD): {
|
|
*(.ram_vector_table)
|
|
} > RAM
|
|
|
|
.text : {
|
|
__ram_text_start__ = .;
|
|
*(.init)
|
|
*(.text*)
|
|
*(.fini)
|
|
/* Pull all c'tors into .text */
|
|
*crtbegin.o(.ctors)
|
|
*crtbegin?.o(.ctors)
|
|
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
|
|
*(SORT(.ctors.*))
|
|
*(.ctors)
|
|
/* Followed by destructors */
|
|
*crtbegin.o(.dtors)
|
|
*crtbegin?.o(.dtors)
|
|
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
|
|
*(SORT(.dtors.*))
|
|
*(.dtors)
|
|
|
|
*(.eh_frame*)
|
|
. = ALIGN(4);
|
|
__ram_text_end__ = .;
|
|
} > RAM AT> FLASH
|
|
__ram_text_source__ = LOADADDR(.text);
|
|
. = ALIGN(4);
|
|
|
|
.data : {
|
|
__data_start__ = .;
|
|
*(vtable)
|
|
|
|
*(.time_critical*)
|
|
|
|
. = ALIGN(4);
|
|
*(.rodata*)
|
|
. = ALIGN(4);
|
|
|
|
*(.data*)
|
|
|
|
. = ALIGN(4);
|
|
*(.after_data.*)
|
|
. = ALIGN(4);
|
|
/* preinit data */
|
|
PROVIDE_HIDDEN (__mutex_array_start = .);
|
|
KEEP(*(SORT(.mutex_array.*)))
|
|
KEEP(*(.mutex_array))
|
|
PROVIDE_HIDDEN (__mutex_array_end = .);
|
|
|
|
. = ALIGN(4);
|
|
/* preinit data */
|
|
PROVIDE_HIDDEN (__preinit_array_start = .);
|
|
KEEP(*(SORT(.preinit_array.*)))
|
|
KEEP(*(.preinit_array))
|
|
PROVIDE_HIDDEN (__preinit_array_end = .);
|
|
|
|
. = ALIGN(4);
|
|
/* init data */
|
|
PROVIDE_HIDDEN (__init_array_start = .);
|
|
KEEP(*(SORT(.init_array.*)))
|
|
KEEP(*(.init_array))
|
|
PROVIDE_HIDDEN (__init_array_end = .);
|
|
|
|
. = ALIGN(4);
|
|
/* finit data */
|
|
PROVIDE_HIDDEN (__fini_array_start = .);
|
|
*(SORT(.fini_array.*))
|
|
*(.fini_array)
|
|
PROVIDE_HIDDEN (__fini_array_end = .);
|
|
|
|
*(.jcr)
|
|
. = ALIGN(4);
|
|
/* All data end */
|
|
__data_end__ = .;
|
|
} > RAM AT> FLASH
|
|
/* __etext is (for backwards compatibility) the name of the .data init source pointer (...) */
|
|
__etext = LOADADDR(.data);
|
|
|
|
.uninitialized_data (NOLOAD): {
|
|
. = ALIGN(4);
|
|
__udata_end__ = .;
|
|
*(.uninitialized_data*)
|
|
} > RAM
|
|
|
|
/* Start and end symbols must be word-aligned */
|
|
.scratch_x : {
|
|
__scratch_x_start__ = .;
|
|
*(.scratch_x.*)
|
|
. = ALIGN(4);
|
|
__scratch_x_end__ = .;
|
|
} > SCRATCH_X AT > FLASH
|
|
__scratch_x_source__ = LOADADDR(.scratch_x);
|
|
|
|
.scratch_y : {
|
|
__scratch_y_start__ = .;
|
|
*(.scratch_y.*)
|
|
. = ALIGN(4);
|
|
__scratch_y_end__ = .;
|
|
} > SCRATCH_Y AT > FLASH
|
|
__scratch_y_source__ = LOADADDR(.scratch_y);
|
|
|
|
.bss : {
|
|
. = ALIGN(4);
|
|
__bss_start__ = .;
|
|
*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.bss*)))
|
|
*(COMMON)
|
|
. = ALIGN(4);
|
|
__bss_end__ = .;
|
|
} > RAM
|
|
|
|
.heap (NOLOAD):
|
|
{
|
|
__end__ = .;
|
|
end = __end__;
|
|
KEEP(*(.heap*))
|
|
__HeapLimit = .;
|
|
} > RAM
|
|
|
|
/* Store web configuration utility HTML */
|
|
.section_disk : {
|
|
ADDR_DISK_IMAGE = .;
|
|
KEEP(*(.section_disk))
|
|
} > DISK_IMAGE
|
|
|
|
/* Firmware metadata section (4k in size, contains version, checksum etc.) */
|
|
.section_metadata : {
|
|
ADDR_FW_METADATA = .;
|
|
KEEP(*(.section_metadata));
|
|
} > FW_METADATA
|
|
|
|
/* Firmware staging section (256k in size, near the end of flash) */
|
|
.section_staging : {
|
|
ADDR_FW_STAGING = .;
|
|
KEEP(*(.section_staging))
|
|
} > FW_STAGING
|
|
|
|
/* Just padding so we can have a nice, consistently-sized .bin file */
|
|
.fill : {
|
|
FILL(0x00);
|
|
. = ORIGIN(FW_METADATA) + LENGTH(FW_METADATA) - 1;
|
|
BYTE(0x00)
|
|
___ROM_AT = .;
|
|
} > FW_METADATA
|
|
|
|
/* Configuration flash section (4k in size, end of flash) */
|
|
.section_config (NOLOAD) : {
|
|
ADDR_CONFIG = .;
|
|
} > FLASH_CONFIG
|
|
|
|
/* .stack*_dummy section doesn't contains any symbols. It is only
|
|
* used for linker to calculate size of stack sections, and assign
|
|
* values to stack symbols later
|
|
*
|
|
* stack1 section may be empty/missing if platform_launch_core1 is not used */
|
|
|
|
/* by default we put core 0 stack at the end of scratch Y, so that if core 1
|
|
* stack is not used then all of SCRATCH_X is free.
|
|
*/
|
|
.stack1_dummy (NOLOAD):
|
|
{
|
|
*(.stack1*)
|
|
} > SCRATCH_X
|
|
.stack_dummy (NOLOAD):
|
|
{
|
|
KEEP(*(.stack*))
|
|
} > SCRATCH_Y
|
|
|
|
.flash_end : {
|
|
__flash_binary_end = .;
|
|
} > FLASH
|
|
|
|
.pad : {
|
|
/* This section will be filled with zeroes */
|
|
FILL(0x00)
|
|
. = ADDR_DISK_IMAGE - __flash_binary_end - 1;
|
|
BYTE(0x00)
|
|
KEEP(*(.pad))
|
|
} > FLASH
|
|
|
|
/* stack limit is poorly named, but historically is maximum heap ptr */
|
|
__StackLimit = ORIGIN(RAM) + LENGTH(RAM);
|
|
__StackOneTop = ORIGIN(SCRATCH_X) + LENGTH(SCRATCH_X);
|
|
__StackTop = ORIGIN(SCRATCH_Y) + LENGTH(SCRATCH_Y);
|
|
__StackOneBottom = __StackOneTop - SIZEOF(.stack1_dummy);
|
|
__StackBottom = __StackTop - SIZEOF(.stack_dummy);
|
|
PROVIDE(__stack = __StackTop);
|
|
|
|
/* Check if data + heap + stack exceeds RAM limit */
|
|
ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed")
|
|
|
|
ASSERT( __binary_info_header_end - __logical_binary_start <= 256, "Binary info must be in first 256 bytes of the binary")
|
|
/* todo assert on extra code */
|
|
}
|
|
|