make it compile on the raspberry Pi zero

.gitignore

@@ -28,3 +28,4 @@ host
 *.user
 .vs
 MiSTer
+arm-buildroot-linux-gnueabihf_sdk-buildroot/

Makefile.arm

@@ -0,0 +1,99 @@
+# makefile to fail if any command in pipe is failed.
+SHELL = /bin/bash -o pipefail
+
+BASE    = ./arm-buildroot-linux-gnueabihf_sdk-buildroot/bin/arm-buildroot-linux-gnueabihf
+
+CC      = $(BASE)-gcc
+LD      = $(BASE)-ld
+STRIP   = $(BASE)-strip
+
+ifeq ($(V),1)
+	Q :=
+else
+	Q := @
+endif
+
+SDK_SYSROOT = arm-buildroot-linux-gnueabihf_sdk-buildroot/arm-buildroot-linux-gnueabihf/sysroot/
+SDK_LIB = $(SDK_SYSROOT)/usr/lib
+
+INCLUDE	= -I./
+INCLUDE	+= -I./lib/libco
+INCLUDE	+= -I./lib/miniz
+INCLUDE	+= -I./lib/md5
+INCLUDE += -I./lib/lzma
+INCLUDE += -I./lib/gpiod/
+INCLUDE += -I./lib/libchdr/include
+INCLUDE += -I./lib/flac/include
+INCLUDE += -I./lib/flac/src/include
+INCLUDE += -I./lib/bluetooth
+INCLUDE += -I./lib/serial_server/library
+
+PRJ = MiSTer
+C_SRC =   $(wildcard *.c) \
+          $(wildcard ./lib/miniz/*.c) \
+          $(wildcard ./lib/md5/*.c) \
+          $(wildcard ./lib/lzma/*.c) \
+          $(wildcard ./lib/flac/src/*.c) \
+          $(wildcard ./lib/libchdr/*.c) \
+          lib/libco/arm.c
+
+CPP_SRC = $(wildcard *.cpp) \
+			arm/scheduler.cpp \
+          $(wildcard ./lib/serial_server/library/*.cpp) \
+          $(wildcard ./support/*/*.cpp)
+
+IMG =     $(wildcard *.png)
+
+IMLIB2_LIB  = -L$(SDK_LIB) -lfreetype -lbz2 -lpng16 -lz -lImlib2 -lgpiod
+
+OBJ	= $(C_SRC:.c=.c.o) $(CPP_SRC:.cpp=.cpp.o) $(IMG:.png=.png.o)
+DEP	= $(C_SRC:.c=.c.d) $(CPP_SRC:.cpp=.cpp.d)
+
+DFLAGS	= $(INCLUDE) -D_7ZIP_ST -DPACKAGE_VERSION=\"1.3.3\" -DRASPBERRY_PI -DUSE_SCHEDULER -DFLAC_API_EXPORTS -DFLAC__HAS_OGG=0 -DHAVE_LROUND -DHAVE_STDINT_H -DHAVE_STDLIB_H -DHAVE_SYS_PARAM_H -DENABLE_64_BIT_WORDS=0 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -DVDATE=\"`date +"%y%m%d"`\"
+CFLAGS	= $(DFLAGS) -w -Wextra -Wno-strict-aliasing -Wno-stringop-overflow -Wno-stringop-truncation -Wno-format-truncation -Wno-psabi -Wno-restrict -c -O3
+LFLAGS	= -lc -lstdc++ -lm -lrt $(IMLIB2_LIB) -Llib/bluetooth -lbluetooth -lpthread
+
+ifeq ($(PROFILING),1)
+	DFLAGS += -DPROFILING
+endif
+
+$(PRJ): $(OBJ)
+	$(Q)$(info $@)
+	$(Q)$(CC) -o $@ $+ $(LFLAGS)
+	$(Q)cp $@ [email protected]
+	$(Q)$(STRIP) $@
+
+.PHONY: sdk
+sdk:
+	tar xzf ../MiSTeX-buildroot/rpi-zero/buildroot/output/images/arm-buildroot-linux-gnueabihf_sdk-buildroot.tar.gz
+
+.PHONY: clean
+clean:
+	$(Q)rm -f *.elf *.map *.lst *.user *~ $(PRJ)
+	$(Q)rm -rf obj DTAR* x64
+	$(Q)find . \( -name '*.o' -o -name '*.d' -o -name '*.bak' -o -name '*.rej' -o -name '*.org' \) -exec rm -f {} \;
+
+%.c.o: %.c
+	$(Q)$(info $<)
+	$(Q)$(CC) $(CFLAGS) -std=gnu99 -o $@ -c $< 2>&1 | sed -e 's/\(.[a-zA-Z]\+\):\([0-9]\+\):\([0-9]\+\):/\1(\2,\ \3):/g'
+
+%.cpp.o: %.cpp
+	$(Q)$(info $<)
+	$(Q)$(CC) $(CFLAGS) -std=gnu++14 -Wno-class-memaccess -o $@ -c $< 2>&1 | sed -e 's/\(.[a-zA-Z]\+\):\([0-9]\+\):\([0-9]\+\):/\1(\2,\ \3):/g'
+
+%.png.o: %.png
+	$(Q)$(info $<)
+	$(Q)$(LD) -r -b binary -o $@ $< 2>&1 | sed -e 's/\(.[a-zA-Z]\+\):\([0-9]\+\):\([0-9]\+\):/\1(\2,\ \3):/g'
+
+
+ifneq ($(MAKECMDGOALS), clean)
+-include $(DEP)
+endif
+%.c.d: %.c
+	$(Q)$(CC) $(DFLAGS) -MM $< -MT $@ -MT $*.c.o -MF $@ 2>&1 | sed -e 's/\(.[a-zA-Z]\+\):\([0-9]\+\):\([0-9]\+\):/\1(\2,\ \3):/g'
+
+%.cpp.d: %.cpp
+	$(Q)$(CC) $(DFLAGS) -MM $< -MT $@ -MT $*.cpp.o -MF $@ 2>&1 | sed -e 's/\(.[a-zA-Z]\+\):\([0-9]\+\):\([0-9]\+\):/\1(\2,\ \3):/g'
+
+# Ensure correct time stamp
+main.cpp.o: $(filter-out main.cpp.o, $(OBJ))

fpga_io.cpp

@@ -25,10 +25,18 @@
 #define fatal(x) /*munmap((void*)map_base, FPGA_REG_SIZE);*/ close(fd); exit(x)
 
 static const char *gpio_chip_name = "gpiochip0";
+#ifdef RASPBERRY_PI
+#define GPIIO_PIN_FPGA_RESET 22
+#define GPIIO_PIN_FPGA_EN    23
+#define GPIIO_PIN_OSD_EN     24
+#define GPIIO_PIN_IO_EN      25
+#else // Sipeed Lichee RV
 #define GPIIO_PIN_FPGA_RESET 102
 #define GPIIO_PIN_FPGA_EN    103
 #define GPIIO_PIN_OSD_EN     104
 #define GPIIO_PIN_IO_EN      105
+#endif
+
 static struct gpiod_chip *gpio_chip;
 static struct gpiod_line *gpio_line_fpga_reset;
 static struct gpiod_line *gpio_line_fpga_en;