ps2rom: Initial commit

This is the first version of the code which works.

.gitignore

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+bin/
+**/obj

Makefile

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+.PHONY: all clean
+
+TOP=$(shell pwd)
+
+# Set a default configuration.
+ifeq ($(CONFIG),)
+CONFIG=release
+endif
+
+all:
+	make -C rom TOP=$(TOP) CONFIG=$(CONFIG)
+
+clean:
+	make -C rom TOP=$(TOP) CONFIG=$(CONFIG) clean

build/core.mk

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+# Common GNU Make rules for building the project
+
+# This makefile is expected to be included after the variables given
+# have been defined:
+#
+# NAME=name
+#
+# TARGET=ee|iop
+#
+# KIND=bin|lib
+#
+# SRCS=[... source-file-list]
+#
+
+debug_Valid := y
+release_Valid := y
+
+ifneq ($($(CONFIG)_Valid),y)
+$(error Invalid configuration $(CONFIG) specified)
+endif
+
+BINDIR = $(TOP)/bin
+OBJDIR = obj/$(CONFIG)
+
+
+# include target-specific recipies specifying how to 
+# build for the target.
+include $(TOP)/build/$(TARGET)-common.mk
+#include $(TOP)/build/$(TARGET)-$(KIND).mk
+
+FINALNAME=$(NAME)_$(CONFIG)
+
+OBJECTS := $(patsubst %.c,obj/$(CONFIG)/%.o,$(filter %.c,$(SRCS)))
+OBJECTS += $(patsubst %.cpp,obj/$(CONFIG)/%.o,$(filter %.cpp,$(SRCS)))
+OBJECTS += $(patsubst %.s,obj/$(CONFIG)/%.o,$(filter %.s,$(SRCS)))
+

build/ee-bin.mk

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+FINALNAME=$(NAME)_$(CONFIG)
+
+OBJECTS := $(patsubst %.c,obj/$(CONFIG)/%.o,$(filter %.c,$(SRCS)))
+OBJECTS += $(patsubst %.cpp,obj/$(CONFIG)/%.o,$(filter %.cpp,$(SRCS)))
+OBJECTS += $(patsubst %.s,obj/$(CONFIG)/%.o,$(filter %.s,$(SRCS)))
+
+$(BINDIR)/$(FINALNAME).elf: $(OBJDIR)/ $(BINDIR)/ $(OBJECTS)
+	$(LD)  $(LDFLAGS) $(LIBS) $(OBJECTS)   -o $@
+
+clean-products:
+	-rm $(BINDIR)/$(FINALNAME).elf
+	-rm -rf obj

build/ee-common.mk

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+# common EE toolchain stuff
+
+# EE toolchain root.
+EE_TRIPLET=mips64r5900el-ps2-elf
+
+CC=$(EE_TRIPLET)-gcc
+AS=$(CC) -mabi=32 -march=r3000 #HACK
+CXX=$(EE_TRIPLET)-g++
+#LD=$(CC)
+LD=mipsel-ps2-irx-gcc # HACK
+AR=$(EE_TRIPLET)-ar
+OBJCOPY=$(EE_TRIPLET)-objcopy
+
+ifeq ($(CONFIG),release)
+CFLAGS := $(CFLAGS) -G0 -O3 -Wall -Wextra -Werror -fno-common -fno-strict-aliasing
+ASFLAGS := -xassembler-with-cpp
+endif
+
+ifeq ($(CONFIG),debug)
+CFLAGS := $(CFLAGS) -G0 -O0 -g3 -Wall -Wextra -fno-common -fno-strict-aliasing
+ASFLAGS := -xassembler-with-cpp -g3
+endif
+
+CXXFLAGS := $(CXXFLAGS) $(CFLAGS)
+
+# compile rules
+$(OBJDIR)/%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.cpp
+	$(CXX) -c $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.s
+	$(AS) -c $(ASFLAGS) $< -o $@
+
+

build/ee-lib.mk

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+FINALNAME=$(NAME)_$(CONFIG)
+
+OBJECTS := $(patsubst %.c,obj/$(CONFIG)/%.o,$(filter %.c,$(SRCS)))
+OBJECTS += $(patsubst %.cpp,obj/$(CONFIG)/%.o,$(filter %.cpp,$(SRCS)))
+OBJECTS += $(patsubst %.s,obj/$(CONFIG)/%.o,$(filter %.s,$(SRCS)))
+
+clean-products:
+	-rm $(BINDIR)/lib$(FINALNAME).a
+	-rm -rf obj
+
+$(BINDIR)/lib$(FINALNAME).a: $(OBJDIR)/ $(BINDIR)/ $(OBJECTS)
+	$(AR) rv $@ $(OBJECTS)

rom/Makefile

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+NAME=ps2rom
+TARGET=ee
+KIND=bin
+
+SELF=$(shell pwd)
+INCS = -I$(TOP)/src
+
+CFLAGS = -ffreestanding -fno-stack-protector -mabi=32
+CXXFLAGS = -fno-exceptions -fno-rtti
+LDFLAGS = -nostartfiles -nodefaultlibs -Wl,-Map,$(BINDIR)/$(FINALNAME).map -T$(SELF)/link.ld
+
+# sources
+SRCS = start.s \
+       ee_start.c
+
+
+.PHONY: all clean clean-products
+include $(TOP)/build/core.mk
+
+
+all: $(BINDIR)/$(FINALNAME).rom
+
+
+$(BINDIR)/:
+	mkdir -p $@
+
+$(OBJDIR)/:
+	mkdir -p $@
+
+
+clean-products:
+	-rm $(BINDIR)/$(FINALNAME).elf
+	-rm -rf obj
+
+clean: clean-products
+	-rm $(BINDIR)/$(FINALNAME).rom
+
+
+$(BINDIR)/$(FINALNAME).rom: $(BINDIR)/$(FINALNAME).elf
+	$(OBJCOPY) -O binary $< $@
+
+$(BINDIR)/$(FINALNAME).elf: $(OBJDIR)/ $(BINDIR)/ $(OBJECTS)
+	$(LD) $(LDFLAGS) $(LIBS) $(OBJECTS)   -o $@
+

rom/ee_start.c

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+
+#define __noreturn __attribute__((noreturn))
+
+static void putc(char c) {
+	*((char*)0x1000f180) = c;
+}
+
+static void puts(const char* s) {
+	while (*s != 0) {
+		putc(*s++);
+	}
+}
+
+
+__noreturn void _ee_start() {
+    puts("Hello World from Riri~ (EE)\n");
+    while(1);
+}
+
+__asm__ (
+	".global ee_start\n"
+	"ee_start:\n"
+	"li	$sp, 0x80010000\n"
+	"j     _ee_start\n");

rom/link.ld

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+_stack_size = 0x80000;
+_heap_size = 1024*1024*10;
+
+
+ENTRY(_start);
+SECTIONS {
+/* 0xbfc00000 */
+	.text 0xbfc00000 : {
+        _text_origin = .;
+		*start.o /* Always link reset first */
+
+		*(.text)
+		*(.rodata)
+	}
+	_text_size = . - _text_origin;
+
+	.reginfo ALIGN(128) : {
+		*(.reginfo)
+	}
+
+	.data ALIGN(128) : {
+        _data_origin = .;
+		*(.data)
+	}
+
+	.rdata ALIGN(128) : {
+		*(.rdata)
+	}
+
+	_data_size = . - _data_origin;
+
+	_gp = ALIGN(128) + 0x7ff0;
+	.lit4 ALIGN(128) : {
+		*(.lit4)
+	}
+	.lit8 ALIGN(128) : {
+		*(.lit8)
+	}
+	.sdata ALIGN(128) : {
+		*(.sdata)
+	}
+
+	.sbss ALIGN(128) (NOLOAD) : {	/* uninitialized data */
+		_fbss = . ;
+		*(.scommon)
+		*(.sbss)
+	}
+
+	.bss ALIGN(128) (NOLOAD) : {	/* uninitialized data */
+		*(.bss)
+	}
+
+	.COMMON ALIGN(128) (NOLOAD) : {	/* uninitialized data */
+		*(COMMON)
+	}
+
+	_bss_size = . - _fbss;
+
+    _end_bss = . - 4;
+    _stack = .;
+    . += _stack_size ;
+    _end_stack = . - 8*5;
+    _end = . ;
+    __lc_bh = . ;
+    . += _heap_size ;
+    __lc_eh = .;
+
+}

rom/start.s

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+.org 0
+.set noat
+
+// externs
+.extern ee_start
+
+.globl _start
+_start:
+    mfc0 $at, $15  // load PRID
+    sltiu $at, 0x59
+    bne $15, 0, __iop
+    nop
+    j ee_start
+    nop
+__iop:             // for now iop stalls.
+    j __iop