- make XCP_SIZE (Exception stacksize) conditional

- use 4K exception stack for low SRAM targets

git-svn-id: http://moon:8086/svn/mips@34 a8ebac50-d88d-4704-bea3-6648445a41b3

src/bootloader/Makefile

@@ -20,7 +20,8 @@ else
 endif
 
 LIBS=-lc -lgcc
-
+CFLAGS += -DXCP_SIZE=4096
+		  
 CC=mipsel-elf-gcc
 LD=mipsel-elf-ld
 OBJDUMP=mipsel-elf-objdump

src/libsys/xcpt_asm.h

@@ -15,7 +15,9 @@ symbol:		.frame	sp, 0, ra
 			.size	function, .-function
 
 /* Exception stack size */
+#ifndef XCP_SIZE
 #define	XCP_SIZE		32768
+#endif
 
 /* save location for registers */
 #define	XCP_SR			0