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rp2: Update custom linker scripts for new pico-sdk.

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Signed-off-by: Phil Howard <phil@gadgetoid.com>
Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Peter Harper 2024-05-22 15:49:46 +01:00 committed by Damien George
parent 815d6a131d
commit c90d996c9d
3 changed files with 313 additions and 1 deletions
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2
ports/rp2/CMakeLists.txt
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@ -525,7 +525,7 @@ endif()
# a linker script modification) until we explicitly add macro calls around the function
# defs to move them into RAM.
if (PICO_ON_DEVICE AND NOT PICO_NO_FLASH AND NOT PICO_COPY_TO_RAM)
pico_set_linker_script(${MICROPY_TARGET} ${CMAKE_CURRENT_LIST_DIR}/memmap_mp.ld)
pico_set_linker_script(${MICROPY_TARGET} ${CMAKE_CURRENT_LIST_DIR}/memmap_mp_${PICO_PLATFORM}.ld)
endif()
pico_add_extra_outputs(${MICROPY_TARGET})

0
ports/rp2/memmap_mp.ld → ports/rp2/memmap_mp_rp2040.ld
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312
ports/rp2/memmap_mp_rp2350.ld Normal file
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@ -0,0 +1,312 @@
/* 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)
*/
MEMORY
{
FLASH(rx) : ORIGIN = 0x10000000, LENGTH = 4096k
RAM(rwx) : ORIGIN = 0x20000000, LENGTH = 512k
SCRATCH_X(rwx) : ORIGIN = 0x20080000, LENGTH = 4k
SCRATCH_Y(rwx) : ORIGIN = 0x20081000, LENGTH = 4k
}
ENTRY(_entry_point)
SECTIONS
{
.flash_begin : {
__flash_binary_start = .;
} > FLASH
/* The bootrom will enter the image at the point indicated in your
IMAGE_DEF, which is usually the reset handler of your vector table.
The debugger will use the ELF entry point, which is the _entry_point
symbol, and in our case is *different from the bootrom's entry point.*
This is used to go back through the bootrom on debugger launches only,
to perform the same initial flash setup that would be performed on a
cold boot.
*/
.text : {
__logical_binary_start = .;
KEEP (*(.vectors))
KEEP (*(.binary_info_header))
__binary_info_header_end = .;
KEEP (*(.embedded_block))
__embedded_block_end = .;
KEEP (*(.reset))
/* TODO revisit this now memset/memcpy/float in ROM */
/* bit of a hack right now to exclude all floating point and time critical (e.g. memset, memcpy) code from
* FLASH ... we will include any thing excluded here in .data below by default */
*(.init)
*libgcc.a:cmse_nonsecure_call.o
/* Change for MicroPython... exclude gc.c, parse.c, vm.c from flash */
*(EXCLUDE_FILE(*libgcc.a: *libc.a:*lib_a-mem*.o *libm.a: *gc.c.obj *vm.c.obj *parse.c.obj) .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)
. = 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 = .);
*(.eh_frame*)
. = ALIGN(4);
} > FLASH
/* Note the boot2 section is optional, and should be discarded if there is
no reference to it *inside* the binary, as it is not called by the
bootrom. (The bootrom performs a simple best-effort XIP setup and
leaves it to the binary to do anything more sophisticated.) However
there is still a size limit of 256 bytes, to ensure the boot2 can be
stored in boot RAM.
Really this is a "XIP setup function" -- the name boot2 is historic and
refers to its dual-purpose on RP2040, where it also handled vectoring
from the bootrom into the user image.
*/
.boot2 : {
__boot2_start__ = .;
*(.boot2)
__boot2_end__ = .;
} > FLASH
ASSERT(__boot2_end__ - __boot2_start__ <= 256,
"ERROR: Pico second stage bootloader must be no more than 256 bytes in size")
.rodata : {
*(EXCLUDE_FILE(*libgcc.a: *libc.a:*lib_a-mem*.o *libm.a:) .rodata*)
*(.srodata*)
. = ALIGN(4);
*(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);
.ram_vector_table (NOLOAD): {
*(.ram_vector_table)
} > RAM
.uninitialized_data (NOLOAD): {
. = ALIGN(4);
*(.uninitialized_data*)
} > RAM
.data : {
__data_start__ = .;
*(vtable)
*(.time_critical*)
/* remaining .text and .rodata; i.e. stuff we exclude above because we want it in RAM */
*(.text*)
. = ALIGN(4);
*(.rodata*)
. = ALIGN(4);
*(.data*)
*(.sdata*)
. = 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 = .);
*(.jcr)
. = ALIGN(4);
} > RAM AT> FLASH
.tdata : {
. = ALIGN(4);
*(.tdata .tdata.* .gnu.linkonce.td.*)
/* All data end */
__tdata_end = .;
} > RAM AT> FLASH
PROVIDE(__data_end__ = .);
/* __etext is (for backwards compatibility) the name of the .data init source pointer (...) */
__etext = LOADADDR(.data);
.tbss (NOLOAD) : {
. = ALIGN(4);
__bss_start__ = .;
__tls_base = .;
*(.tbss .tbss.* .gnu.linkonce.tb.*)
*(.tcommon)
__tls_end = .;
} > RAM
.bss (NOLOAD) : {
. = ALIGN(4);
__tbss_end = .;
*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.bss*)))
*(COMMON)
PROVIDE(__global_pointer$ = . + 2K);
*(.sbss*)
. = ALIGN(4);
__bss_end__ = .;
} > RAM
.heap (NOLOAD):
{
__end__ = .;
end = __end__;
KEEP(*(.heap*))
/* historically on GCC sbrk was growing past __HeapLimit to __StackLimit, however
to be more compatible, we now set __HeapLimit explicitly to where the end of the heap is */
/* Change for MicroPython: don't include this, it increases reported firmware size.
/* . = ORIGIN(RAM) + LENGTH(RAM); */
__HeapLimit = .;
} > 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);
/* .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 : {
KEEP(*(.embedded_end_block*))
PROVIDE(__flash_binary_end = .);
} > FLASH =0xaa
/* stack limit is poorly named, but historically is maximum heap ptr */
__StackLimit = __bss_end__ + __micropy_c_heap_size__;
/* Define start and end of GC heap */
__GcHeapStart = __StackLimit; /* after the C heap (sbrk limit) */
__GcHeapEnd = ORIGIN(RAM) + LENGTH(RAM) - __micropy_extra_stack__;
/* Define start and end of C stack */
__StackTop = ORIGIN(SCRATCH_Y) + LENGTH(SCRATCH_Y);
__StackBottom = __GcHeapEnd;
PROVIDE(__stack = __StackTop);
/* picolibc and LLVM */
PROVIDE (__heap_start = __end__);
PROVIDE (__heap_end = __HeapLimit);
PROVIDE( __tls_align = MAX(ALIGNOF(.tdata), ALIGNOF(.tbss)) );
PROVIDE( __tls_size_align = (__tls_size + __tls_align - 1) & ~(__tls_align - 1));
PROVIDE( __arm32_tls_tcb_offset = MAX(8, __tls_align) );
/* llvm-libc */
PROVIDE (_end = __end__);
PROVIDE (__llvm_libc_heap_limit = __HeapLimit);
/* Check GC heap is at least 64 KB */
/* This is half the minimum RAM suggested for full-featured MicroPython.
* This value accounts for large static buffers included in user C or C++
* modules, which might significantly reduce the available heap but also
* lower demand for memory at runtime.
*/
ASSERT((__GcHeapEnd - __GcHeapStart) > 64*1024, "GcHeap is too small")
ASSERT( __binary_info_header_end - __logical_binary_start <= 1024, "Binary info must be in first 1024 bytes of the binary")
ASSERT( __embedded_block_end - __logical_binary_start <= 4096, "Embedded block must be in first 4096 bytes of the binary")
/* todo assert on extra code */
}