soc: ambiq: Add shared_ram section

Add linker script file shared_ram.ld where defines sections used by specific peripherals. Signed-off-by: Swift Tian <swift.tian@ambiq.com>
danieldegrasse · Jun 15, 2024 · 81e51f0 · 81e51f0
1 parent 292a4eb
commit 81e51f0
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diff --git a/soc/ambiq/apollo3x/CMakeLists.txt b/soc/ambiq/apollo3x/CMakeLists.txt
@@ -6,4 +6,6 @@
 zephyr_sources(soc.c)
 zephyr_include_directories(.)
 
+zephyr_linker_sources(SECTIONS shared_ram.ld)
+
 set(SOC_LINKER_SCRIPT ${ZEPHYR_BASE}/include/zephyr/arch/arm/cortex_m/scripts/linker.ld CACHE INTERNAL "")
diff --git a/soc/ambiq/apollo3x/shared_ram.ld b/soc/ambiq/apollo3x/shared_ram.ld
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024 Ambiq Micro Inc. <www.ambiq.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#if CONFIG_DT_HAS_AMBIQ_MSPI_CONTROLLER_ENABLED
+    SECTION_PROLOGUE (mspi_buff, CONFIG_SRAM_BASE_ADDRESS + CONFIG_MSPI_AMBIQ_BUFF_RAM_LOCATION (NOLOAD),)
+    {
+        __mspi_buff_start = .;
+        KEEP(*(SORT_BY_NAME(".mspi_buff*")))
+        . = ALIGN(CONFIG_MSPI_AMBIQ_BUFF_ALIGNMENT);
+        __mspi_buff_end = .;
+    } GROUP_LINK_IN(RAMABLE_REGION)
+#endif