1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
#############################################################
# Makefile Arguments
#############################################################
# BSP_DIR sets the path to the target-specific board support package.
BSP_DIR ?= $(abspath bsp)
# SRC_DIR sets the path to the program source directory
SRC_DIR ?= $(abspath src)
# The configuration defaults to Debug. Valid choices are:
# - debug
# - release
CONFIGURATION ?= debug
#############################################################
# BSP loading
#############################################################
# There must be a settings makefile fragment in the BSP's board directory.
ifeq ($(wildcard $(BSP_DIR)/settings.mk),)
$(error Unable to find BSP for $(TARGET), expected to find $(BSP_DIR)/settings.mk)
endif
# Include the BSP settings
include $(BSP_DIR)/settings.mk
# Check that settings.mk sets RISCV_ARCH and RISCV_ABI
ifeq ($(RISCV_ARCH),)
$(error $(BSP_DIR)/board.mk must set RISCV_ARCH, the RISC-V ISA string to target)
endif
ifeq ($(RISCV_ABI),)
$(error $(BSP_DIR)/board.mk must set RISCV_ABI, the ABI to target)
endif
ifeq ($(RISCV_CMODEL),)
RISCV_CMODEL = medany
endif
ifeq ($(PROGRAM),dhrystone)
ifeq ($(LINK_TARGET),)
ifneq ($(TARGET),freedom-e310-arty)
ifneq ($(TARGET),sifive-hifive1)
ifneq ($(TARGET),sifive-hifive1-revb)
LINK_TARGET = ramrodata
endif
endif
endif
endif
endif
ifeq ($(PROGRAM),coremark)
ifeq ($(LINK_TARGET),)
LINK_TARGET = ramrodata
endif
endif
ifeq ($(LINK_TARGET),)
LINK_TARGET = default
endif
# Determines the XLEN from the toolchain tuple
ifeq ($(patsubst rv32%,rv32,$(RISCV_ARCH)),rv32)
RISCV_XLEN := 32
else ifeq ($(patsubst rv64%,rv64,$(RISCV_ARCH)),rv64)
RISCV_XLEN := 64
else
$(error Unable to determine XLEN from $(RISCV_ARCH))
endif
#############################################################
# Toolchain
#############################################################
# Allow users to select a different cross compiler.
CROSS_COMPILE ?= riscv64-unknown-elf
# If users don't specify RISCV_PATH then assume that the tools will just be in
# their path.
ifeq ($(RISCV_PATH),)
RISCV_GCC := $(CROSS_COMPILE)-gcc
RISCV_GXX := $(CROSS_COMPILE)-g++
RISCV_OBJDUMP := $(CROSS_COMPILE)-objdump
RISCV_OBJCOPY := $(CROSS_COMPILE)-objcopy
RISCV_GDB := $(CROSS_COMPILE)-gdb
RISCV_AR := $(CROSS_COMPILE)-ar
RISCV_SIZE := $(CROSS_COMPILE)-size
else
RISCV_GCC := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-gcc)
RISCV_GXX := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-g++)
RISCV_OBJDUMP := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-objdump)
RISCV_OBJCOPY := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-objcopy)
RISCV_GDB := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-gdb)
RISCV_AR := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-ar)
RISCV_SIZE := $(abspath $(RISCV_PATH)/bin/$(CROSS_COMPILE)-size)
PATH := $(abspath $(RISCV_PATH)/bin):$(PATH)
endif
SEGGER_JLINK_EXE := JLinkExe
SEGGER_JLINK_GDB_SERVER := JLinkGDBServer
#############################################################
# Software Flags
#############################################################
# Set the arch, ABI, and code model
RISCV_CCASFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=$(RISCV_CMODEL)
RISCV_CFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=$(RISCV_CMODEL)
RISCV_CXXFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=$(RISCV_CMODEL)
# Prune unused functions and data
RISCV_CFLAGS += -ffunction-sections -fdata-sections
RISCV_CXXFLAGS += -ffunction-sections -fdata-sections
# Include the Metal headers
RISCV_CCASFLAGS += -I$(abspath $(BSP_DIR)/install/include/)
RISCV_CFLAGS += -I$(abspath $(BSP_DIR)/install/include/)
RISCV_CXXFLAGS += -I$(abspath $(BSP_DIR)/install/include/)
# Use newlib-nano
RISCV_CCASFLAGS += --specs=nano.specs
RISCV_CFLAGS += --specs=nano.specs
RISCV_CXXFLAGS += --specs=nano.specs
# Turn on garbage collection for unused sections
RISCV_LDFLAGS += -Wl,--gc-sections
# Turn on linker map file generation
RISCV_LDFLAGS += -Wl,-Map,$(PROGRAM).map
# Turn off the C standard library
RISCV_LDFLAGS += -nostartfiles -nostdlib
# Find the archive files and linker scripts
RISCV_LDFLAGS += -L$(sort $(dir $(abspath $(filter %.a,$^)))) -T$(abspath $(filter %.lds,$^))
# Link to the relevant libraries
RISCV_LDLIBS += -Wl,--start-group -lc -lgcc -lmetal -lmetal-gloss -Wl,--end-group
# Load the configuration Makefile
CONFIGURATION_FILE = $(wildcard $(CONFIGURATION).mk)
ifeq ($(words $(CONFIGURATION_FILE)),0)
$(error Unable to find the Makefile $(CONFIGURATION).mk for CONFIGURATION=$(CONFIGURATION))
endif
include $(CONFIGURATION).mk
# Benchmark CFLAGS go after loading the CONFIGURATION so that they can override the optimization level
ifeq ($(PROGRAM),dhrystone)
ifeq ($(DHRY_OPTION),)
# Ground rules (default)
RISCV_XCFLAGS += -mexplicit-relocs -fno-inline
else ifeq ($(DHRY_OPTION),fast)
# With inline and without lto
RISCV_XCFLAGS += -mexplicit-relocs -finline
else ifeq ($(DHRY_OPTION),best)
# Best Score
RISCV_XCFLAGS += -finline -flto -fwhole-program
endif
RISCV_XCFLAGS += -DDHRY_ITERS=$(TARGET_DHRY_ITERS)
endif
ifeq ($(PROGRAM),coremark)
ifeq ($(RISCV_SERIES),sifive-7-series)
RISCV_XCFLAGS += -O2 -fno-common -funroll-loops -finline-functions -funroll-all-loops --param max-inline-insns-auto=20 -falign-functions=8 -falign-jumps=8 -falign-loops=8 --param inline-min-speedup=10 -mtune=sifive-7-series -ffast-math
else
RISCV_XCFLAGS += -O2 -fno-common -funroll-loops -finline-functions --param max-inline-insns-auto=20 -falign-functions=4 -falign-jumps=4 -falign-loops=4 --param inline-min-speedup=10
endif
RISCV_XCFLAGS += -DITERATIONS=$(TARGET_CORE_ITERS)
endif
#############################################################
# Software
#############################################################
PROGRAM_ELF ?= $(SRC_DIR)/$(CONFIGURATION)/$(PROGRAM).elf
PROGRAM_HEX ?= $(SRC_DIR)/$(CONFIGURATION)/$(PROGRAM).hex
PROGRAM_LST ?= $(SRC_DIR)/$(CONFIGURATION)/$(PROGRAM).lst
.PHONY: all
all: software
.PHONY: software
software: $(PROGRAM_ELF)
software: $(PROGRAM_HEX)
PROGRAM_SRCS = $(wildcard $(SRC_DIR)/*.c) $(wildcard $(SRC_DIR)/*.h) $(wildcard $(SRC_DIR)/*.S)
$(PROGRAM_ELF): \
$(PROGRAM_SRCS) \
$(BSP_DIR)/install/lib/$(CONFIGURATION)/libmetal.a \
$(BSP_DIR)/install/lib/$(CONFIGURATION)/libmetal-gloss.a \
$(BSP_DIR)/metal.$(LINK_TARGET).lds
mkdir -p $(dir $@)
$(MAKE) -C $(SRC_DIR) $(basename $(notdir $@)) \
PORT_DIR=$(PORT_DIR) \
AR=$(RISCV_AR) \
CC=$(RISCV_GCC) \
CXX=$(RISCV_GXX) \
ASFLAGS="$(RISCV_ASFLAGS)" \
CCASFLAGS="$(RISCV_CCASFLAGS)" \
CFLAGS="$(RISCV_CFLAGS)" \
CXXFLAGS="$(RISCV_CXXFLAGS)" \
XCFLAGS="$(RISCV_XCFLAGS)" \
LDFLAGS="$(RISCV_LDFLAGS)" \
LDLIBS="$(RISCV_LDLIBS)"
mv $(SRC_DIR)/$(basename $(notdir $@)).map $(dir $@)
mv $(SRC_DIR)/$(basename $(notdir $@)) $@
touch -c $@
$(RISCV_OBJDUMP) --source --all-headers --demangle --line-numbers --wide $@ > $(PROGRAM_LST)
$(RISCV_SIZE) $@
# Use elf2hex if we're creating a hex file for RTL simulation
ifneq ($(filter rtl,$(TARGET_TAGS)),)
.PHONY: software
$(PROGRAM_HEX): \
scripts/elf2hex/install/bin/$(CROSS_COMPILE)-elf2hex \
$(PROGRAM_ELF)
$< --output $@ --input $(PROGRAM_ELF) --bit-width $(COREIP_MEM_WIDTH)
else
$(PROGRAM_HEX): \
$(PROGRAM_ELF)
$(RISCV_OBJCOPY) -O ihex $(PROGRAM_ELF) $@
endif
.PHONY: clean-software
clean-software:
$(MAKE) -C $(SRC_DIR) PORT_DIR=$(PORT_DIR) clean
rm -rf $(SRC_DIR)/$(CONFIGURATION)
.PHONY: clean
clean: clean-software
#############################################################
# elf2hex
#############################################################
scripts/elf2hex/build/Makefile: scripts/elf2hex/configure
@rm -rf $(dir $@)
@mkdir -p $(dir $@)
cd $(dir $@); \
$(abspath $<) \
--prefix=$(abspath $(dir $<))/install \
--target=$(CROSS_COMPILE)
scripts/elf2hex/install/bin/$(CROSS_COMPILE)-elf2hex: scripts/elf2hex/build/Makefile
$(MAKE) -C $(dir $<) install
touch -c $@
.PHONY: clean-elf2hex
clean-elf2hex:
rm -rf scripts/elf2hex/build scripts/elf2hex/install
clean: clean-elf2hex
|
