stm32f4: add stm32f446ze variant and variant specific linker selection

Adds an STM32F4 BSP variant with a variant linker script.

bsps/arm/stm32f4/start/linkcmds.stm32f446ze

@@ -0,0 +1,24 @@
+MEMORY {
+	RAM_INT : ORIGIN = 0x20000000, LENGTH = 128k
+	ROM_INT : ORIGIN = 0x08000000, LENGTH = 512K
+}
+
+REGION_ALIAS ("REGION_START", ROM_INT);
+REGION_ALIAS ("REGION_VECTOR", RAM_INT);
+REGION_ALIAS ("REGION_TEXT", ROM_INT);
+REGION_ALIAS ("REGION_TEXT_LOAD", ROM_INT);
+REGION_ALIAS ("REGION_RODATA", ROM_INT);
+REGION_ALIAS ("REGION_RODATA_LOAD", ROM_INT);
+REGION_ALIAS ("REGION_DATA", RAM_INT);
+REGION_ALIAS ("REGION_DATA_LOAD", ROM_INT);
+REGION_ALIAS ("REGION_FAST_TEXT", RAM_INT);
+REGION_ALIAS ("REGION_FAST_TEXT_LOAD", ROM_INT);
+REGION_ALIAS ("REGION_FAST_DATA", RAM_INT);
+REGION_ALIAS ("REGION_FAST_DATA_LOAD", ROM_INT);
+REGION_ALIAS ("REGION_BSS", RAM_INT);
+REGION_ALIAS ("REGION_WORK", RAM_INT);
+REGION_ALIAS ("REGION_STACK", RAM_INT);
+REGION_ALIAS ("REGION_NOCACHE", RAM_INT);
+REGION_ALIAS ("REGION_NOCACHE_LOAD", RAM_INT);
+
+INCLUDE linkcmds.armv7m

spec/build/bsps/arm/stm32f4/bspstm32f446ze.yml

@@ -0,0 +1,19 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+arch: arm
+bsp: stm32f446ze
+build-type: bsp
+cflags: []
+cppflags: []
+enabled-by: true
+family: stm32f4
+includes: []
+install: []
+links:
+- role: build-dependency
+  uid: ../../opto2
+- role: build-dependency
+  uid: ../../tstsmallmem
+- role: build-dependency
+  uid: grp
+source: []
+type: build

spec/build/bsps/arm/stm32f4/grp.yml

@@ -51,9 +51,11 @@ links:
 - role: build-dependency
   uid: optusartbaud
 - role: build-dependency
-  uid: ../../optconsoleirq
+  uid: optlinkcmds
 - role: build-dependency
-  uid: ../../linkcmds
+  uid: linkcmds
+- role: build-dependency
+  uid: ../../optconsoleirq
 - role: build-dependency
   uid: ../../obj
 - role: build-dependency

spec/build/bsps/arm/stm32f4/linkcmds.yml

@@ -0,0 +1,9 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: config-file
+content: |
+  INCLUDE ${STM32F4_LINKCMDS}
+enabled-by: true
+install-path: ${BSP_LIBDIR}
+links: []
+target: linkcmds
+type: build

spec/build/bsps/arm/stm32f4/obj.yml

@@ -37,6 +37,8 @@ install:
   source:
   - bsps/arm/stm32f4/start/linkcmds.stm32f105rc
   - bsps/arm/stm32f4/start/linkcmds.stm32f4
+  - bsps/arm/stm32f4/start/linkcmds.stm32f446ze
+
 links: []
 source:
 - bsps/arm/shared/clock/clock-armv7m.c

spec/build/bsps/arm/stm32f4/optlinkcmds.yml

@@ -0,0 +1,19 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+actions:
+- get-string: null
+- env-assign: null
+build-type: option
+default:
+- enabled-by: arm/stm32f446ze
+  value: linkcmds.stm32f446ze
+- enabled-by: arm/stm32f105rc
+  value: linkcmds.stm32f105rc
+- enabled-by: true
+  value: linkcmds.stm32f4
+description: |
+  The default linker command file based on the BSP variant.
+enabled-by: true
+format: '{}'
+links: []
+name: STM32F4_LINKCMDS
+type: build