1 files changed, 109 insertions, 0 deletions

diff --git a/embassy-mcxa/ram.ld b/embassy-mcxa/ram.ld
new file mode 100644
index 000000000..816ab6819
--- /dev/null
+++ b/embassy-mcxa/ram.ld
@@ -0,0 +1,109 @@
+/* Simple RAM execution linker script for MCXA276 */
+MEMORY
+{
+  RAM : ORIGIN = 0x20000000, LENGTH = 128K
+}
+
+/* Pull in device default interrupt symbol aliases (e.g., CMC = DefaultHandler) */
+INCLUDE device.x
+
+
+/* Provide core exception weak aliases if not supplied by cortex-m-rt's link.x */
+PROVIDE(NonMaskableInt = DefaultHandler);
+PROVIDE(HardFault = DefaultHandler);
+PROVIDE(MemoryManagement = DefaultHandler);
+PROVIDE(BusFault = DefaultHandler);
+PROVIDE(UsageFault = DefaultHandler);
+PROVIDE(SecureFault = DefaultHandler);
+PROVIDE(SVCall = DefaultHandler);
+PROVIDE(DebugMonitor = DefaultHandler);
+PROVIDE(PendSV = DefaultHandler);
+PROVIDE(SysTick = DefaultHandler);
+
+/* In RAM-run we have no FLASH sidata; copy from sdata */
+__sidata = __sdata;
+
+/* Ensure the PAC interrupt table is kept */
+EXTERN(__INTERRUPTS);
+
+
+/* Pull in defmt's linker script to generate the defmt table that host decoders expect */
+INCLUDE defmt.x
+
+ENTRY(Reset)
+EXTERN(VECTOR_TABLE)
+EXTERN(Reset)
+EXTERN(main)
+
+/* Define _stack_start at end of RAM BEFORE it's used in vector table */
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);
+
+SECTIONS
+{
+  .vector_table ORIGIN(RAM) :
+  {
+    /* Slot 0: Initial stack pointer - use our explicitly set _stack_start */
+    LONG(_stack_start);
+    /* Slot 1: Reset vector - address of Reset function with Thumb bit set */
+    LONG(Reset | 1);
+    /* Cortex-M33 core exceptions (slots 2-14) */
+    KEEP(*(.vector_table.exceptions));
+    /* Peripheral interrupt vectors provided by PAC (slots 16+) */
+    KEEP(*(.vector_table.interrupts));
+  } > RAM
+
+  .text :
+  {
+    KEEP(*(.text.Reset));
+    KEEP(*(.text.main));
+    *(.text .text.*);
+  } > RAM
+
+  /* Keep defmt table and fragments so host decoders can find metadata */
+  .defmt :
+  {
+    KEEP(*(.defmt));
+    KEEP(*(.defmt.*));
+  } > RAM
+
+  .rodata :
+  {
+    *(.rodata .rodata.*);
+  } > RAM
+
+  .data :
+  {
+    . = ALIGN(4);
+    __sdata = .;
+    *(.data .data.*);
+    . = ALIGN(4);
+    __edata = .;
+  } > RAM
+
+  /* Ensure RTT control block with "SEGGER RTT" signature is loaded to RAM */
+  .rtt :
+  {
+    KEEP(*(.rtt));
+  } > RAM
+
+  /* Place uninitialized buffers (like defmt-rtt) in RAM; load is fine for RAM-run */
+  .uninit :
+  {
+    *(.uninit .uninit.*);
+  } > RAM
+
+  .bss :
+  {
+    . = ALIGN(4);
+    __sbss = .;
+    *(.bss .bss.*);
+    . = ALIGN(4);
+    __ebss = .;
+  } > RAM
+
+  /* Discard exception unwinding info */
+  /DISCARD/ :
+  {
+    *(.ARM.exidx .ARM.exidx.*);
+  }
+}