diff options
| -rw-r--r-- | mubios/.gitignore | 1 | ||||
| -rw-r--r-- | mubios/Makefile | 64 | ||||
| -rw-r--r-- | mubios/linker.ld | 88 |
3 files changed, 153 insertions, 0 deletions
diff --git a/mubios/.gitignore b/mubios/.gitignore new file mode 100644 index 0000000..0f293b7 --- /dev/null +++ b/mubios/.gitignore @@ -0,0 +1 @@ +*.qcow2
\ No newline at end of file diff --git a/mubios/Makefile b/mubios/Makefile new file mode 100644 index 0000000..b5c268e --- /dev/null +++ b/mubios/Makefile @@ -0,0 +1,64 @@ +# RCC-Project +# +# Copyright (C) 2026 Richard Qin +# +# This file is part of RCC-Project. +# +# RCC-Project is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 3 of the License, or (at your option) any +# later version. +# +# RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR +# A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# RCC-Project; see the file COPYING. If not see +# <http://www.gnu.org/licenses/>. + +PROJECT := mubios +BUILD_DIR := build +ELF := $(BUILD_DIR)/$(PROJECT).elf +ROM := $(BUILD_DIR)/$(PROJECT).rom + +CC := gcc +AS := as +LD := ld +OBJCOPY := objcopy + +CFLAGS := -m32 -ffreestanding -fno-pie -fno-stack-protector \ + -fno-builtin -nostdinc -Iinclude -Wall -Wextra +ASFLAGS := --32 +LDFLAGS := -m elf_i386 -nostdlib -T linker.ld + +C_SRCS := $(wildcard core/*.c drivers/*.c services/*.c) +S_SRCS := $(wildcard arch/*.S) +OBJS := $(patsubst %.c,$(BUILD_DIR)/%.o,$(C_SRCS)) \ + $(patsubst %.S,$(BUILD_DIR)/%.o,$(S_SRCS)) + +.PHONY: all elf rom + +all: $(ROM) + +elf: $(ELF) + +rom: $(ROM) + +$(ELF): $(OBJS) linker.ld + @mkdir -p $(dir $@) + $(LD) $(LDFLAGS) -o $@ $(OBJS) + +$(ROM): $(ELF) + @mkdir -p $(dir $@) + $(OBJCOPY) -O binary $< $@ + @test "$$(stat -c %s $@)" -le 65536 + @truncate -s 65536 $@ + +$(BUILD_DIR)/%.o: %.c + @mkdir -p $(dir $@) + $(CC) $(CFLAGS) -c $< -o $@ + +$(BUILD_DIR)/%.o: %.S + @mkdir -p $(dir $@) + $(AS) $(ASFLAGS) $< -o $@ diff --git a/mubios/linker.ld b/mubios/linker.ld new file mode 100644 index 0000000..003c29b --- /dev/null +++ b/mubios/linker.ld @@ -0,0 +1,88 @@ +/* + RCC-Project + + Copyright (C) 2026 Richard Qin + + This file is part of RCC-Project. + + RCC-Project is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your option) any + later version. + + RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + RCC-Project; see the file COPYING. If not see + <http://www.gnu.org/licenses/>. +*/ + +OUTPUT_FORMAT(elf32-i386) +OUTPUT_ARCH(i386) +ENTRY(reset_entry) + +MEMORY +{ + ROM (rx) : ORIGIN = 0xF0000, LENGTH = 0x10000 + EBDA (rw) : ORIGIN = 0x9C000, LENGTH = 0x4000 +} + +SECTIONS +{ + . = ORIGIN(ROM); + __rom_start = .; + + . = ALIGN(16); + .text16 : + { + KEEP(*(.text16 .text16.*)) + } > ROM + + . = ALIGN(16); + .text32 : + { + *(.text32 .text32.*) + } > ROM + + . = ALIGN(4); + .rodata : + { + *(.rodata .rodata.*) + } > ROM + + . = ALIGN(4); + .data : + { + __data_start = .; + *(.data .data.*) + __data_end = .; + } > EBDA AT> ROM + + __data_load_start = LOADADDR(.data); + + .reset 0xFFFF0 : + { + KEEP(*(.reset)) + } > ROM + + .bss (NOLOAD) : + { + . = ALIGN(4); + __bss_start = .; + *(.bss .bss.* COMMON) + __bss_end = .; + } > EBDA + + __ebda_start = ORIGIN(EBDA); + __ebda_end = ORIGIN(EBDA) + LENGTH(EBDA); + __rom_end = ORIGIN(ROM) + LENGTH(ROM); + + ASSERT(SIZEOF(.reset) <= 16, "reset section exceeds 16 bytes") + ASSERT(__bss_end <= __ebda_end, "EBDA overflow") + ASSERT( + LOADADDR(.reset) + SIZEOF(.reset) <= ORIGIN(ROM) + LENGTH(ROM), + "ROM overflow" + ) +} |