Streamline project build process

Makefile

@@ -1,23 +1,32 @@
-SUBDIRS=common kernel projects/hello projects/trapped projects/ping-pong projects/demonstrator
+export ROOT=${abspath .}
 
-all:
-	for i in $(SUBDIRS); do \
-		make -C $$i all; \
-	done
 
-$(SUBDIRS):
-	make -C $@ all
+PROJECT?=hello
+PLATFORM?=qemu_virt
+BUILD?=${ROOT}/build/${PROJECT}
+S3K_CONF_H?=${ROOT}/projects/${PROJECT}/s3k_conf.h
+
+include tools.mk
+include common/plat/${PLATFORM}.mk
+
+all: common kernel projects/${PROJECT}
+
+common kernel projects/${PROJECT}:
+	make -C $@ all \
+		PLATFORM=${PLATFORM} \
+		BUILD=${BUILD} \
+		S3K_CONF_H=${S3K_CONF_H}
+
+qemu gdb: common kernel projects/${PROJECT}
+	bash scripts/$@.sh ${BUILD}
 
 clean:
-	for i in $(SUBDIRS); do \
-		make -C $$i clean; \
-	done
-	rm -rf docs
+	rm -r ${BUILD}
 
 docs:
 	doxygen
 
 format:
 	clang-format -i $(shell find -name '*.[hc]' -not -path '*/.*')
 
-.PHONY: all docs clean $(SUBDIRS)
+.PHONY: all docs clean qemu gdb kernel common projects/${PROJECT}

README.md

@@ -23,13 +23,10 @@ Build and Run
 
 For building and running the `hello` project
 ```bash
-# Build common libraries
-make common
-# Go to project directory and build the project
-cd projects/hello
-make
+# Build common libraries kernel and hello project
+make PROJECT=hello
 # Run the program using QEMU
-./scripts/qemu.sh
+make qemu PROJECT=hello
 ```
 
 Requirements

common/Makefile

@@ -1,14 +1,47 @@
 
-PLATFORM?=${patsubst plat/%.mk, %, ${wildcard plat/*.mk}}
+include plat/${PLATFORM}.mk
 
-all: ${PLATFORM}
+CFLAGS=-march=${ARCH} -mabi=${ABI} -mcmodel=${CMODEL}
+CFLAGS+=-DPLATFORM_${PLATFORM}
+CFLAGS+=-Os
+CFLAGS+=-flto -ffat-lto-objects
+CFLAGS+=-nostdlib -Iinc
 
-${PLATFORM}:
-	${MAKE} -f build.mk PLATFORM=$@ all
+SRCS2OBJS=${patsubst src/%.S, ${BUILD}/common/%.o, ${filter %.S, ${1}}} \
+	  ${patsubst src/%.c, ${BUILD}/common/%.o, ${filter %.c, ${1}}}
 
+ALTC_SRCS=${wildcard src/altc/*.[cS]}
+S3K_SRCS=${wildcard src/s3k/*.[cS]}
+START_SRCS=${wildcard src/start/*.S}
+
+PLAT_OBJS=${call SRCS2OBJS, ${PLAT_SRCS}}
+ALTC_OBJS=${call SRCS2OBJS, ${ALTC_SRCS}}
+S3K_OBJS=${call SRCS2OBJS, ${S3K_SRCS}}
+START_OBJS=${call SRCS2OBJS, ${START_SRCS}}
+
+all: ${BUILD}/common/libplat.a ${BUILD}/common/libaltc.a ${BUILD}/common/libs3k.a ${START_OBJS}
+
+${BUILD}/common/libplat.a: ${PLAT_OBJS}
+	echo ${PLAT_OBJS}
+	@mkdir -p ${@D}
+	${AR} cr $@ $^
+
+${BUILD}/common/libaltc.a: ${ALTC_OBJS}
+	@mkdir -p ${@D}
+	${AR} cr $@ $^
+
+${BUILD}/common/libs3k.a: ${S3K_OBJS}
+	@mkdir -p ${@D}
+	${AR} cr $@ $^
+
+${BUILD}/common/%.o: src/%.c
+	@mkdir -p ${@D}
+	${CC} -o $@ $< -c ${CFLAGS}
+
+${BUILD}/common/%.o: src/%.S
+	@mkdir -p ${@D}
+	${CC} -o $@ $< -c ${CFLAGS}
 clean:
-	for i in ${PLATFORM}; do \
-		${MAKE} -f build.mk PLATFORM=$$i clean; \
-	done
+	rm -rf ${BUILD}
 
-.PHONY: all
+.PHONY: all clean

common/plat/qemu_virt.mk

@@ -1,7 +1,9 @@
-ARCH=rv64imac_zicsr
-ABI=lp64
-CMODEL=medany
-COMMON_INC=${ROOT}/common/inc
-COMMON_LIB=${ROOT}/common/plat/qemu_virt
-STARTFILES=${ROOT}/common/plat/qemu_virt/start
+export ARCH=rv64imac_zicsr
+export ABI=lp64
+export CMODEL=medany
+export QEMU_MACHINE=virt
+export QEMU_SMP=4
+export COMMON_INC=${ROOT}/common/inc
+export COMMON_LIB=${BUILD}/common
+export STARTFILES=${BUILD}/common/start
 PLAT_SRCS=src/drivers/uart/ns16550a.c src/drivers/time.c

common/plat/sifive_unleashed.mk

@@ -1,7 +1,9 @@
-ARCH=rv64imac_zicsr
-ABI=lp64
-CMODEL=medany
-COMMON_INC=${ROOT}/common/inc
-COMMON_LIB=${ROOT}/common/plat/sifive_unleashed
-STARTFILES=${ROOT}/common/plat/sifive_unleashed/start
+export ARCH=rv64imac_zicsr
+export ABI=lp64
+export CMODEL=medany
+export QEMU_MACHINE=sifive_u
+export QEMU_SMP=5
+export COMMON_INC=${ROOT}/common/inc
+export COMMON_LIB=${BUILD}/common
+export STARTFILES=${BUILD}/common/start
 PLAT_SRCS=src/drivers/uart/sifive.c src/drivers/time.c

kernel/Makefile

@@ -2,28 +2,11 @@
 .POSIX:
 
 # Kernel basename
-PROGRAM?=s3k
-
-# Kernel config
-S3K_CONF_H?=s3k_conf.h
-
-# Platform config
-PLATFORM?=qemu_virt
-
-# Repository root
-ROOT=..
-
-# Build target
-BUILD?=build
-
-# Get toolchain
-include ${ROOT}/tools.mk
-
-# Platform specific config
-include ${ROOT}/common/plat/${PLATFORM}.mk
+PROGRAM?=kernel
 
 # CC flags
 CFLAGS=-march=${ARCH} -mabi=${ABI} -mcmodel=${CMODEL}
+CFLAGS+=-DPLATFORM_${PLATFORM}
 CFLAGS+=-std=c11
 CFLAGS+=-Os -g3
 CFLAGS+=-Wall -Wextra -Werror
@@ -32,7 +15,6 @@ CFLAGS+=-Wshadow -fno-common
 CFLAGS+=-Wno-builtin-declaration-mismatch
 CFLAGS+=-fno-stack-protector
 CFLAGS+=-flto
-CFLAGS+=-DPLATFORM_${PLATFORM}
 
 # Include files and directories
 CFLAGS+=-include ${S3K_CONF_H}
@@ -53,7 +35,7 @@ LDFLAGS+=-laltc -lplat
 # Source files
 S_SRCS=${wildcard src/*.S}
 C_SRCS=${wildcard src/*.c}
- 
+
 # Object files
 OBJS=${patsubst src/%.S, ${BUILD}/${PROGRAM}/%.o, ${S_SRCS}} \
      ${patsubst src/%.c, ${BUILD}/${PROGRAM}/%.o, ${C_SRCS}}
@@ -63,14 +45,10 @@ DEPS=${patsubst %.o, ${BUILD}/obj/%.d, ${OBJS}}
 
 # Targets
 ELF=${BUILD}/${PROGRAM}.elf
-BIN=${ELF:.elf=.bin}
-DA=${ELF:.elf=.da}
 
-all: ${ELF} ${BIN} ${DA}
+all: ${ELF}
 
 elf: ${ELF}
-bin: ${BIN}
-da: ${DA}
 
 ${BUILD}/${PROGRAM}/%.o: src/%.S
 	@mkdir -p ${@D}
@@ -84,18 +62,6 @@ ${ELF}: ${OBJS}
 	@mkdir -p ${@D}
 	${CC} -o $@ ${OBJS} ${LDFLAGS} 
 
-${BIN}: ${ELF}
-	${OBJCOPY} -O binary $< $@
-
-${DA}: ${ELF}
-	${OBJDUMP} -D $< > $@
-
-format:
-	clang-format -i $(shell find -name '*.[hc]' -not -path '*/.*')
-
-clean:
-	rm -rf $(BUILD)
-
 .PHONY: all elf bin da format clean
 
 -include ${DEPS}

kernel/inc/kassert.h

@@ -19,7 +19,7 @@
 
 #define _X_(x) #x
 #define KASSERT_FAILURE(FILE, LINE) \
-	altio_puts("Kernel assertion failed at " FILE ":" _X_(LINE) ".");
+	alt_puts("Kernel assertion failed at " FILE ":" _X_(LINE) ".");
 
 #define KASSERT(EXPR)                                        \
 	do {                                                 \

projects/demonstrator/Makefile

@@ -1,21 +1,10 @@
-BUILD      ?=build
-S3K_CONF_H ?=s3k_conf.h
+APPS=boot monitor uartppp crypto app0 app1
 
-SUBDIRS=../../kernel boot monitor uartppp crypto app0 app1
-
-all: ${SUBDIRS}
+all: ${APPS}
 
 boot: monitor uartppp crypto
 
-${SUBDIRS}:
-	@${MAKE} -C $@ all \
-		BUILD=${abspath ${BUILD}} \
-		S3K_CONF_H=${abspath ${S3K_CONF_H}}
-
-qemu gdb: all
-	./scripts/$@.sh
-
-clean:
-	rm -rf ${BUILD}
+${APPS}:
+	@${MAKE} -f build.mk PROGRAM=$@ all
 
-.PHONY: all clean ${SUBDIRS} qemu gdb
+.PHONY: all ${APPS}

projects/demonstrator/boot/main.c

@@ -1,7 +1,6 @@
 #include "../config.h"
-#include "drivers/uart.h"
 #include "s3k/s3k.h"
-#include "s3klib/altio.h"
+#include "altc/altio.h"
 #include "string.h"
 
 #include <stddef.h>
@@ -197,11 +196,6 @@ void main(void)
 		   S3K_MEM_RW);
 	s3k_pmp_load(5, 1);
 	s3k_sync_mem();
-	uart_init();
-	while(1) {
-		char c = alt_getchar();
-		alt_putchar(c);
-	}
 
 	alt_puts("setting up memory ...");
 	/* Copy binary of monitor process, setup PMP and program counter. */