arm/raspberry: Set the workspace based on the mailbox version.

- Update the linkcmd file to support configure settings

- Set the workspace size based on the revision value

c/src/lib/libbsp/arm/raspberrypi/configure.ac

@@ -10,14 +10,11 @@ AC_INIT([rtems-c-src-lib-libbsp-arm-raspberrypi],[_RTEMS_VERSION],[https://devel
 RTEMS_TOP(../../../../../..)
 RTEMS_SOURCE_TOP
 RTEMS_BUILD_TOP
-RTEMS_BSP_LINKCMDS
 
 RTEMS_CANONICAL_TARGET_CPU
 AM_INIT_AUTOMAKE([no-define nostdinc foreign 1.12.2])
 RTEMS_BSP_CONFIGURE
 
-
-
 RTEMS_BSPOPTS_SET([BSP_START_RESET_VECTOR],[*],[])
 RTEMS_BSPOPTS_HELP([BSP_START_RESET_VECTOR],[reset vector address for BSP start])
 
@@ -37,7 +34,22 @@ RTEMS_BSPOPTS_SET([BSP_IS_RPI2],[*],[0])
 RTEMS_BSPOPTS_HELP([BSP_IS_RPI2],[Set if the BSP variant is Raspberry Pi 2.])
 AM_CONDITIONAL(RTEMS_RPI2,[test "$BSP_IS_RPI2" = "1"])
 
+RPI_RAM_MMU_LENGTH="16k"
+RPI_RAM_LENGTH_AVAILABLE="256M"
+RPI_RAM_NOCACHE_LENGTH="2M"
+
+AC_DEFUN([RPI_LINKCMD],[
+AC_ARG_VAR([$1],[$2; default $3])dnl
+[$1]=[$]{[$1]:-[$3]}
+])
+
+RPI_LINKCMD([RPI_RAM_MMU_LENGTH],[MMU region length],[${BSP_RPI_RAM_MMU_LENGTH}])
+RPI_LINKCMD([RPI_RAM_LENGTH_AVAILABLE],[RAM region length],[${BSP_RPI_RAM_LENGTH_AVAILABLE}])
+RPI_LINKCMD([RPI_RAM_NOCACHE_LENGTH],[No-cache region length],[${BSP_RPI_RAM_NOCACHE_LENGTH}])
+
 RTEMS_BSP_CLEANUP_OPTIONS
 
-AC_CONFIG_FILES([Makefile])
+AC_CONFIG_FILES([
+Makefile
+linkcmds:../../../../../../bsps/arm/raspberrypi/start/linkcmds.in])
 AC_OUTPUT