add a few more fw examples

dhrystone/Makefile

@@ -0,0 +1,25 @@
+TARGET := dhrystone
+
+ASM_SRCS := 
+C_SRCS := dhry_stubs.c dhry_printf.c
+HEADERS := dhry.h
+
+DHRY_SRCS := dhry_1.c dhry_2.c
+DHRY_CFLAGS := -O2 -DTIME -DNO_INIT -fno-inline -fno-builtin-printf -Wno-implicit -march=rv32ima
+
+XLEN ?= 32
+CFLAGS := -g -Og -fno-common
+LDFLAGS := -g -Wl,--wrap=scanf -Wl,--wrap=printf -Wl,--wrap=exit
+
+DHRY_OBJS := $(patsubst %.c,%.o,$(DHRY_SRCS))
+LINK_OBJS := $(DHRY_OBJS)
+
+#BOARD = iss
+BOARD=freedom-e300-hifive1
+TOOL_DIR=/opt/shared/riscv/FreedomStudio/20180122/SiFive/riscv64-unknown-elf-gcc-20171231-x86_64-linux-centos6/bin
+
+BSP_BASE = bsp
+include $(BSP_BASE)/env/common.mk
+
+$(DHRY_OBJS): %.o: %.c $(HEADERS)
+	$(CC) $(CFLAGS) $(DHRY_CFLAGS) -c -o $@ $<