Update environment

2019-05-29 11:10:01 +02:00
parent c95e490a21
commit 8718f035a5
12 changed files with 338 additions and 139 deletions
@@ -0,0 +1,86 @@
+# environment
+
+AARCH64_TOOLCHAIN ?= aarch64-linux-gnu
+
+
+# Shortcuts
+
+CC=clang --target=aarch64-none-elf -mcpu=cortex-a57
+# CC=$(AARCH64_TOOLCHAIN)-gcc
+LD=$(AARCH64_TOOLCHAIN)-ld
+OBJCOPY=$(AARCH64_TOOLCHAIN)-objcopy --target elf64-littleaarch64
+
+CFLAGS += -O0
+CFLAGS += -g
+CFLAGS += -nostdlib
+CFLAGS += -march=armv8-a
+#CFLAGS += -std=c99
+#CFLAGS += -pedantic
+#CFLAGS += -Wall
+#CFLAGS += -Wmissing-prototypes
+#CFLAGS += -Wstrict-prototypes
+#CFLAGS += -Wold-style-definition
+
+BUILD_DIR=build
+
+
+# Files
+
+KERNEL_MEMMAP = sys/memmap
+
+KERNEL_SOURCES = \
+  aarch64/boot.s \
+  sys/main.c \
+  sys/uart.c \
+
+KERNEL_LIST := $(wildcard $(KERNEL_SOURCES))
+KERNEL_OBJS := $(addsuffix .o, $(addprefix $(BUILD_DIR)/, ${KERNEL_LIST}))
+
+all: kernel
+
+
+# compilation 
+
+kernel: $(BUILD_DIR)/kernel.elf # $(BUILD_DIR)/kernel.sym
+
+$(BUILD_DIR)/kernel.elf: $(KERNEL_OBJS)
+	$(info linking target: $@)
+	$(LD) -T$(KERNEL_MEMMAP) $^ -o $@
+	$(info done: $@)
+
+$(BUILD_DIR)/kernel.bin: $(BUILD_DIR)/kernel.elf
+	$(OBJCOPY) -O binary $< $@
+
+$(BUILD_DIR)/kernel.sym: $(BUILD_DIR)/kernel.elf
+	$(OBJCOPY) --only-keep-debug $< $@
+	$(OBJCOPY) --strip-debug $@
+
+$(BUILD_DIR)/%.o: %
+	$(info compiling file: $<)
+	@mkdir -p $(dir ./$(BUILD_DIR)/$<)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+
+.PHONY: clean run
+
+# helpers
+QEMU_CMD = \
+  qemu-system-aarch64 \
+    -cpu cortex-a57 \
+    -machine type=virt \
+    -nographic \
+    -smp 4 \
+    -m 4098 \
+    -kernel build/kernel.elf \
+    -serial stdio \
+    -monitor none
+
+clean:
+	rm -Rf ./$(BUILD_DIR)/*
+
+run: kernel
+	$(QEMU_CMD)
+
+
+debug: kernel
+	$(QEMU_CMD) -gdb tcp::1234 -S