Add option for ARM interrupt stack

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@981 42af7a65-404d-4744-a932-0658087f49c3

configs/ntosd-dm320/uip/defconfig

@@ -50,6 +50,10 @@
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_DRAM_START - The start address of DRAM (physical)
 # CONFIG_DRAM_VSTART - The startaddress of DRAM (virtual)
+# CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
+#   stack. If defined, this symbol is the size of the interrupt
+#   stack in bytes.  If not defined, the user task stacks will be
+#   used during interrupt handling.
 # CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
 #
 CONFIG_ARCH=arm
@@ -63,6 +67,7 @@ CONFIG_DRAM_SIZE=0x01000000
 CONFIG_DRAM_START=0x01000000
 CONFIG_DRAM_VSTART=0x00000000
 CONFIG_DRAM_NUTTXENTRY=0x01008000
+CONFIG_ARCH_INTERRUPTSTACK=0
 CONFIG_ARCH_STACKDUMP=n
 
 #