Arm backend: Add example linkerscripts for U55/U85

Add linkerscripts for exector_runner targeting U55/U85 in examples/arm
instead of using the linkerscripts from core_platform and then
applying patches.

The patches are deleted since they are no longer needed.

Change-Id: I379cf1cd3d9464227fee0555e39847e5b61cc392
Signed-off-by: [email protected]

Author: perheld

examples/arm/ethos-u-setup/core_platform/0001-Add-got-section-to-the-DDR.patch

@@ -162,8 +162,28 @@ target_sources(
                               arm_memory_allocator.cpp
 )
 
-# Include the target's bare-metal linker script
-ethosu_eval_link_options(arm_executor_runner)
+# Use our own linkerscripts
+# Check for "U55" in SYSTEM_CONFIG
+string(FIND "${SYSTEM_CONFIG}" "U55" U55_FOUND)
+
+# Check for "U85" in SYSTEM_CONFIG
+string(FIND "${SYSTEM_CONFIG}" "U85" U85_FOUND)
+
+# Check if neither "U55" nor "U85" was found
+if(U55_FOUND EQUAL -1 AND U85_FOUND EQUAL -1)
+    message(FATAL_ERROR "SYSTEM_CONFIG does not contain 'U55' or 'U85'. Configuration aborting.")
+endif()
+
+# Proceed with specific actions if either is found
+if(NOT U55_FOUND EQUAL -1)
+    message(STATUS "SYSTEM_CONFIG contains 'U55'.")
+    target_link_options(arm_executor_runner PRIVATE "-T" "${CMAKE_SOURCE_DIR}/Corstone-300.ld")
+endif()
+
+if(NOT U85_FOUND EQUAL -1)
+    message(STATUS "SYSTEM_CONFIG contains 'U85'.")
+    target_link_options(arm_executor_runner PRIVATE "-T" "${CMAKE_SOURCE_DIR}/Corstone-320.ld")
+endif()
 
 set(arm_executor_runner_link)
 list(

examples/arm/ethos-u-setup/core_platform/0002-Move-input_data_sec-to-NOLOAD-area.patch

@@ -0,0 +1,191 @@
+/*
+ * Copyright 2025 Arm Limited and/or its affiliates.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+ /*
+ * This is a simplified linkerscript for the Corstone-300 memory system.
+ * This example has been modified to place certain sections in specific memory.
+ * Please refer to the Corstone SSE-300 Technical Reference Manual for
+ * further information.
+ *
+ * https://developer.arm.com/Processors/Corstone-300
+ */
+
+__STACK_SIZE = 0x00008000;
+__HEAP_SIZE = 0x00008000;
+MEMORY
+{
+  ITCM (rx) : ORIGIN = 0x10000000, LENGTH = 0x00080000
+  BRAM (rw) : ORIGIN = 0x11000000, LENGTH = 0x00100000
+  DTCM (rw) : ORIGIN = 0x30000000, LENGTH = 0x00080000
+  SRAM (rw) : ORIGIN = 0x31000000, LENGTH = 0x00200000
+  QSPI (rw) : ORIGIN = 0x38000000, LENGTH = 0x00800000
+  DDR (rwx) : ORIGIN = 0x70000000, LENGTH = 0x60000000
+}
+PHDRS
+{
+    rom_exec PT_LOAD;
+    rom_dram PT_LOAD;
+    null PT_NULL;
+}
+ENTRY(Reset_Handler)
+SECTIONS
+{
+  .text :
+  {
+    _vectors = .;
+    KEEP(*(.vectors))
+    *(EXCLUDE_FILE(
+                  *op_*.cpp.obj
+                   )
+    .text*)
+    KEEP(*(.init))
+    KEEP(*(.fini))
+    *crtbegin.o(.ctors)
+    *crtbegin?.o(.ctors)
+    *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+    *(SORT(.ctors.*))
+    *(.ctors)
+    *crtbegin.o(.dtors)
+    *crtbegin?.o(.dtors)
+    *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+    *(SORT(.dtors.*))
+    *(.dtors)
+    KEEP(*(.eh_frame*))
+  } > ITCM :rom_exec
+  .ARM.extab :
+  {
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+  } > ITCM :rom_exec
+  .ARM.exidx :
+  {
+  __exidx_start = .;
+    *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+  __exidx_end = .;
+  } > ITCM :rom_exec
+  .copy.table :
+  {
+    . = ALIGN(4);
+    __copy_table_start__ = .;
+    LONG (__etext)
+    LONG (__data_start__)
+    LONG ((__data_end__ - __data_start__) / 4)
+    LONG (__eddr_data)
+    LONG (__sram_data_start__)
+    LONG ((__sram_data_end__ - __sram_data_start__) / 4)
+    LONG (__eddr_data + (__sram_data_end__ - __sram_data_start__))
+    LONG (__rodata_start__)
+    LONG ((__rodata_end__ - __rodata_start__) / 4)
+    __copy_table_end__ = .;
+  } > ITCM :rom_exec
+  .zero.table :
+  {
+    . = ALIGN(4);
+    __zero_table_start__ = .;
+    LONG (__bss_start__)
+    LONG ((__bss_end__ - __bss_start__) / 4)
+    __zero_table_end__ = .;
+  __etext = ALIGN (4);
+  } > ITCM :rom_exec
+  .data : AT(__etext)
+  {
+    __data_start__ = .;
+    *(vtable)
+    *(.data)
+    *(.data.*)
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP(*(.preinit_array))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP(*(SORT(.init_array.*)))
+    KEEP(*(.init_array))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP(*(SORT(.fini_array.*)))
+    KEEP(*(.fini_array))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    KEEP(*(.jcr*))
+    . = ALIGN(4);
+    __data_end__ = .;
+  } > DTCM :rom_exec
+  .sram.bss :
+  {
+    . = ALIGN(16);
+    . = ALIGN(32);
+    *(.bss.tensor_arena)
+    . = ALIGN(16);
+    *(.bss.ethosu_scratch);
+    *.(output_data_sec)
+  } > SRAM :null
+  .ddr :
+  {
+    . = ALIGN(16);
+    *(network_model_sec)
+    * (expected_output_data_sec)
+    . = ALIGN(16);
+    * (sec_command_stream, sec_weight_data, sec_input_data)
+    * (.got*)
+    * (ethosu_core_in_queue)
+    * (ethosu_core_out_queue)
+    . = ALIGN(4);
+  } > DDR :rom_dram
+  .ddr_noload (NOLOAD) :
+  {
+    . = ALIGN(16);
+    *(input_data_sec)
+    . = ALIGN(16);
+  } > DDR :null
+  __eddr_data = ALIGN(4);
+  .sram.data :
+  {
+    __sram_data_start__ = .;
+    *(.sram.data)
+    . = ALIGN(4);
+    *op_*.cpp.obj (*.text*)
+    __sram_data_end__ = .;
+  } > BRAM AT >DDR :rom_dram
+  .rodata :
+  {
+    __rodata_start__ = .;
+    *(.rodata)
+    *(.rodata.*)
+    . = ALIGN(4);
+    __rodata_end__ = .;
+  } > DTCM AT >DDR :rom_dram
+  .bss :
+  {
+    . = ALIGN(4);
+    __bss_start__ = .;
+    *(.bss)
+    *(.bss.*)
+    *(COMMON)
+    . = ALIGN(4);
+    __bss_end__ = .;
+  } > DTCM :null
+  .heap (COPY) :
+  {
+    . = ALIGN(8);
+    __end__ = .;
+    PROVIDE(end = .);
+    . = . + __HEAP_SIZE;
+    . = ALIGN(8);
+    __HeapLimit = .;
+  } > DTCM :null
+  .stack (ORIGIN(DTCM) + LENGTH(DTCM) - __STACK_SIZE) (COPY) :
+  {
+    . = ALIGN(8);
+    __StackLimit = .;
+    . = . + __STACK_SIZE;
+    . = ALIGN(8);
+    __StackTop = .;
+  } > DTCM :null
+  PROVIDE(__stack = __StackTop);
+  __RAM_segment_used_end__ = .;
+  ASSERT(__StackLimit >= __HeapLimit, "region DTCM overflowed with stack")
+}