FASMMMMMMM
This commit is contained in:
parent
946c9e468d
commit
e2572d50af
GPG Key ID:
9151B109B73ECAD5
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@ -1,5 +1,6 @@
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*.elf
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*.o
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*.img
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*.bin
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mnt/
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build/
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16
Makefile
16
Makefile
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@ -1,17 +1,15 @@
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all: build/kernel-i386.elf
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clean:
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-@rm build/*.o build/*.elf 2> /dev/null || true
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-@rm *.bin 2> /dev/null || true
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build/start32.o: build/ src/start32.asm
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nasm -felf32 src/start32.asm -o build/start32.o
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build/kernel-i386.elf: build/start32.o
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tcc -m32 -nostdlib -Wl,-Ttext,0x100000 -o build/kernel-i386.elf src/*.c build/start32.o
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image: build/kernel-i386.elf mount
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cp build/kernel-i386.elf mnt/
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start32.bin: src/start32.asm src/serial.asm
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fasm src/start32.asm start32.bin
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image: start32.bin mount
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cp start32.bin mnt/koalemos/
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sync
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qemu-multiboot: build/kernel-i386.elf
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qemu-system-i386 -kernel build/kernel-i386.elf -serial stdio
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qemu-multiboot: start32.bin
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qemu-system-i386 -kernel start32.bin -serial stdio
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qemu-image: image
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qemu-system-i386 koalemos.img -serial stdio
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@ -3,7 +3,4 @@ Multiboot compatible stupid useless OS-like project.
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## Compatibility
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32bit x86 legacy BIOS system
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## Building
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NASM and TinyCCompiler are used.
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TCC might need manual compilation for 32bit crosscompilation
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on 64bit systems.
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Just download the source and `make cross` or something.
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FASM is used as the assembler.
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@ -1,24 +0,0 @@
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#include "framebuffer.h"
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static unsigned long fb_address;
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static unsigned long fb_pitch;
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static unsigned short fb_width, fb_height;
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static unsigned char fb_bpp, fb_bytespp;
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static unsigned char fb_rpos, fb_bpos, fb_gpos;
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void initfb(unsigned long addr, unsigned short w, unsigned short h, unsigned char bpp, unsigned long pitch, unsigned char rpos, unsigned char gpos, unsigned char bpos) {
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fb_address = addr;
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fb_pitch = pitch;
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fb_width = w;
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fb_height = h;
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fb_bpp = bpp;
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fb_bytespp = bpp/8;
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fb_rpos = rpos;
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fb_gpos = gpos;
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fb_bpos = bpos;
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}
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void putpixel(unsigned short x, unsigned short y, unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
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if (x>fb_width || y> fb_height) return;
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*((unsigned long *)(fb_address + y*fb_pitch + x*fb_bytespp)) = r<<fb_rpos | g<<fb_gpos | b<<fb_bpos;
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}
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@ -1,7 +0,0 @@
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#ifndef _FRAMEBUFFER_H
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#define _FRAMEBUFFER_H 1
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void initfb(unsigned long addr, unsigned short w, unsigned short h, unsigned char bpp, unsigned long pitch, unsigned char rpos, unsigned char gpos, unsigned char bpos);
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void putpixel(unsigned short x, unsigned short y, unsigned char r, unsigned char g, unsigned char b, unsigned char a);
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#endif
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83
src/kernel.c
83
src/kernel.c
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@ -1,83 +0,0 @@
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#include "multiboot.h"
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#include "framebuffer.h"
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#include "serial.h"
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#include "xtoa.h"
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static inline void outb(unsigned short port, unsigned char val) {
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asm volatile ("outb %0, %1" : : "a"(val), "Nd"(port) : "memory");
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}
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static inline unsigned char inb(unsigned short port) {
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unsigned char ret;
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asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port) : "memory");
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return ret;
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}
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void kmain (unsigned int mbootmagick, multiboot_info_t* mbootinfo) {
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// Cursor disabling
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outb(0x3D4, 0x0A);
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outb(0x3D5, 0x20);
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int serial_initialized = serial_init();
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serial_write_string("\n=== KoalemOS ===\n");
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// Check multiboot header
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if (mbootmagick != MULTIBOOT_BOOTLOADER_MAGIC) {
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return;
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}
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serial_write_string("\nMultiboot flags: ");
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serial_write_string(itoa(mbootinfo->flags, 2));
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// Check videomode
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if (mbootinfo->flags & MULTIBOOT_INFO_VBE_INFO) {
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serial_write_string("\nVBE Mode: 0x");
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serial_write_string(itoa(mbootinfo->vbe_mode, 16));
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}
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if (!(mbootinfo->flags & MULTIBOOT_INFO_FRAMEBUFFER_INFO)) {
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serial_write_string("\nVideo info not available");
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return;
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}
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serial_write_string("\nFramebuffer: ");
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serial_write_string("\n Address: 0x");
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serial_write_string(ultoa(mbootinfo->framebuffer_addr, 16));
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serial_write_string("\n Dimensions: ");
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serial_write_string(itoa(mbootinfo->framebuffer_width, 10));
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serial_write_string("X");
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serial_write_string(itoa(mbootinfo->framebuffer_height, 10));
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serial_write_string("x");
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serial_write_string(itoa(mbootinfo->framebuffer_bpp, 10));
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serial_write_string("\n Pitch: ");
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serial_write_string(itoa(mbootinfo->framebuffer_pitch, 10));
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serial_write_string("\n RPos:");
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serial_write_string(itoa(mbootinfo->framebuffer_red_field_position, 10));
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serial_write_string("\n GPos:");
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serial_write_string(itoa(mbootinfo->framebuffer_green_field_position, 10));
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serial_write_string("\n BPos:");
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serial_write_string(itoa(mbootinfo->framebuffer_blue_field_position, 10));
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serial_write_string("\nMemory: ");
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serial_write_string("\n lower: ");
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serial_write_string(uitoa(mbootinfo->mem_lower, 10));
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serial_write_string(" k");
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serial_write_string("\n upper: ");
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serial_write_string(uitoa(mbootinfo->mem_upper/1024, 10));
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serial_write_string(" M");
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initfb(mbootinfo->framebuffer_addr, mbootinfo->framebuffer_width, mbootinfo->framebuffer_height, mbootinfo->framebuffer_bpp, mbootinfo->framebuffer_pitch, mbootinfo->framebuffer_red_field_position, mbootinfo->framebuffer_green_field_position, mbootinfo->framebuffer_blue_field_position);
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int x, y, i;
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unsigned char c = 0;
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for(;;) {
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for(y=0; y < mbootinfo->framebuffer_height; y++) {
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for(x=0; x < mbootinfo->framebuffer_width; x++) {
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putpixel(x, y, c, c, c, 0xff);
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}
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}
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c+=4;
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}
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serial_write_string("\nExecution finished, halting...");
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}
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274
src/multiboot.h
274
src/multiboot.h
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@ -1,274 +0,0 @@
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/* multiboot.h - Multiboot header file. */
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/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
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* DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef MULTIBOOT_HEADER
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#define MULTIBOOT_HEADER 1
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/* How many bytes from the start of the file we search for the header. */
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#define MULTIBOOT_SEARCH 8192
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#define MULTIBOOT_HEADER_ALIGN 4
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/* The magic field should contain this. */
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#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
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/* This should be in %eax. */
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#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
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/* Alignment of multiboot modules. */
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#define MULTIBOOT_MOD_ALIGN 0x00001000
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/* Alignment of the multiboot info structure. */
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#define MULTIBOOT_INFO_ALIGN 0x00000004
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/* Flags set in the ’flags’ member of the multiboot header. */
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/* Align all boot modules on i386 page (4KB) boundaries. */
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#define MULTIBOOT_PAGE_ALIGN 0x00000001
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/* Must pass memory information to OS. */
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#define MULTIBOOT_MEMORY_INFO 0x00000002
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/* Must pass video information to OS. */
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#define MULTIBOOT_VIDEO_MODE 0x00000004
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/* This flag indicates the use of the address fields in the header. */
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#define MULTIBOOT_AOUT_KLUDGE 0x00010000
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/* Flags to be set in the ’flags’ member of the multiboot info structure. */
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/* is there basic lower/upper memory information? */
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#define MULTIBOOT_INFO_MEMORY 0x00000001
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/* is there a boot device set? */
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#define MULTIBOOT_INFO_BOOTDEV 0x00000002
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/* is the command-line defined? */
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#define MULTIBOOT_INFO_CMDLINE 0x00000004
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/* are there modules to do something with? */
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#define MULTIBOOT_INFO_MODS 0x00000008
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/* These next two are mutually exclusive */
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/* is there a symbol table loaded? */
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#define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
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/* is there an ELF section header table? */
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#define MULTIBOOT_INFO_ELF_SHDR 0X00000020
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/* is there a full memory map? */
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#define MULTIBOOT_INFO_MEM_MAP 0x00000040
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/* Is there drive info? */
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#define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
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/* Is there a config table? */
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#define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
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/* Is there a boot loader name? */
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#define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
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/* Is there a APM table? */
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#define MULTIBOOT_INFO_APM_TABLE 0x00000400
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/* Is there video information? */
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#define MULTIBOOT_INFO_VBE_INFO 0x00000800
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#define MULTIBOOT_INFO_FRAMEBUFFER_INFO 0x00001000
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#ifndef ASM_FILE
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typedef unsigned char multiboot_uint8_t;
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typedef unsigned short multiboot_uint16_t;
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typedef unsigned int multiboot_uint32_t;
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typedef unsigned long long multiboot_uint64_t;
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struct multiboot_header
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{
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/* Must be MULTIBOOT_MAGIC - see above. */
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multiboot_uint32_t magic;
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/* Feature flags. */
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multiboot_uint32_t flags;
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/* The above fields plus this one must equal 0 mod 2^32. */
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multiboot_uint32_t checksum;
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/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
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multiboot_uint32_t header_addr;
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multiboot_uint32_t load_addr;
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multiboot_uint32_t load_end_addr;
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multiboot_uint32_t bss_end_addr;
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multiboot_uint32_t entry_addr;
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/* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
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multiboot_uint32_t mode_type;
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multiboot_uint32_t width;
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multiboot_uint32_t height;
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multiboot_uint32_t depth;
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};
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/* The symbol table for a.out. */
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struct multiboot_aout_symbol_table
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{
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multiboot_uint32_t tabsize;
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multiboot_uint32_t strsize;
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multiboot_uint32_t addr;
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multiboot_uint32_t reserved;
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};
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typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
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/* The section header table for ELF. */
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struct multiboot_elf_section_header_table
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{
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multiboot_uint32_t num;
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multiboot_uint32_t size;
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multiboot_uint32_t addr;
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multiboot_uint32_t shndx;
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};
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typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
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struct multiboot_info
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{
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/* Multiboot info version number */
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multiboot_uint32_t flags;
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/* Available memory from BIOS */
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multiboot_uint32_t mem_lower;
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multiboot_uint32_t mem_upper;
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/* "root" partition */
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multiboot_uint32_t boot_device;
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/* Kernel command line */
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multiboot_uint32_t cmdline;
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/* Boot-Module list */
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multiboot_uint32_t mods_count;
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multiboot_uint32_t mods_addr;
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union
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{
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multiboot_aout_symbol_table_t aout_sym;
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multiboot_elf_section_header_table_t elf_sec;
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} u;
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/* Memory Mapping buffer */
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multiboot_uint32_t mmap_length;
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multiboot_uint32_t mmap_addr;
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/* Drive Info buffer */
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multiboot_uint32_t drives_length;
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multiboot_uint32_t drives_addr;
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/* ROM configuration table */
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multiboot_uint32_t config_table;
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/* Boot Loader Name */
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multiboot_uint32_t boot_loader_name;
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/* APM table */
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multiboot_uint32_t apm_table;
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/* Video */
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multiboot_uint32_t vbe_control_info;
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multiboot_uint32_t vbe_mode_info;
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multiboot_uint16_t vbe_mode;
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multiboot_uint16_t vbe_interface_seg;
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multiboot_uint16_t vbe_interface_off;
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multiboot_uint16_t vbe_interface_len;
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multiboot_uint64_t framebuffer_addr;
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multiboot_uint32_t framebuffer_pitch;
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multiboot_uint32_t framebuffer_width;
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multiboot_uint32_t framebuffer_height;
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multiboot_uint8_t framebuffer_bpp;
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#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
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#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
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#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
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multiboot_uint8_t framebuffer_type;
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union
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{
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struct
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{
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multiboot_uint32_t framebuffer_palette_addr;
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multiboot_uint16_t framebuffer_palette_num_colors;
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};
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struct
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{
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multiboot_uint8_t framebuffer_red_field_position;
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multiboot_uint8_t framebuffer_red_mask_size;
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multiboot_uint8_t framebuffer_green_field_position;
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multiboot_uint8_t framebuffer_green_mask_size;
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multiboot_uint8_t framebuffer_blue_field_position;
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multiboot_uint8_t framebuffer_blue_mask_size;
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};
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};
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};
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typedef struct multiboot_info multiboot_info_t;
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struct multiboot_color
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{
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multiboot_uint8_t red;
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multiboot_uint8_t green;
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multiboot_uint8_t blue;
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};
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struct multiboot_mmap_entry
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{
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multiboot_uint32_t size;
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multiboot_uint64_t addr;
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multiboot_uint64_t len;
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#define MULTIBOOT_MEMORY_AVAILABLE 1
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#define MULTIBOOT_MEMORY_RESERVED 2
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#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
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#define MULTIBOOT_MEMORY_NVS 4
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#define MULTIBOOT_MEMORY_BADRAM 5
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multiboot_uint32_t type;
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} __attribute__((packed));
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typedef struct multiboot_mmap_entry multiboot_memory_map_t;
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struct multiboot_mod_list
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{
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/* the memory used goes from bytes ’mod_start’ to ’mod_end-1’ inclusive */
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multiboot_uint32_t mod_start;
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multiboot_uint32_t mod_end;
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/* Module command line */
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multiboot_uint32_t cmdline;
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/* padding to take it to 16 bytes (must be zero) */
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multiboot_uint32_t pad;
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};
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typedef struct multiboot_mod_list multiboot_module_t;
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/* APM BIOS info. */
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struct multiboot_apm_info
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{
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multiboot_uint16_t version;
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multiboot_uint16_t cseg;
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multiboot_uint32_t offset;
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multiboot_uint16_t cseg_16;
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multiboot_uint16_t dseg;
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multiboot_uint16_t flags;
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multiboot_uint16_t cseg_len;
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multiboot_uint16_t cseg_16_len;
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multiboot_uint16_t dseg_len;
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};
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#endif /* ! ASM_FILE */
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#endif /* ! MULTIBOOT_HEADER */
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@ -0,0 +1,94 @@
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SERIAL_PORT equ 0x3f8
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||||
|
||||
serialinit:
|
||||
pushad
|
||||
|
||||
;Disable ints
|
||||
mov dx, SERIAL_PORT+1
|
||||
mov al, 0x00
|
||||
out dx, al
|
||||
|
||||
;Enable DLAB baud divisor and set 3 (38400 baud)
|
||||
mov al, 0x80
|
||||
mov dx, SERIAL_PORT+3
|
||||
out dx, al
|
||||
;Baud divisor lo byte
|
||||
mov al, 0x03
|
||||
mov dx, SERIAL_PORT
|
||||
out dx, al
|
||||
;Baud divisor hi byte
|
||||
mov al, 0x00
|
||||
mov dx, SERIAL_PORT+1
|
||||
out dx, al
|
||||
|
||||
;8bits, no parity, one stop bit
|
||||
mov al, 0x03
|
||||
mov dx, SERIAL_PORT+3
|
||||
out dx, al
|
||||
|
||||
;Enable+clear FIFO, 14-byte threshold
|
||||
mov al, 0xc7
|
||||
mov dx, SERIAL_PORT+2
|
||||
out dx, al
|
||||
|
||||
;IRQs enabled, RTS/DSR set
|
||||
mov al, 0x0b
|
||||
mov dx, SERIAL_PORT+4
|
||||
out dx, al
|
||||
|
||||
;Set loopback for test purposes
|
||||
mov al, 0x1e
|
||||
out dx, al
|
||||
|
||||
;; Check if serial is workie
|
||||
mov al, 0xae
|
||||
mov dx, SERIAL_PORT
|
||||
out dx, al
|
||||
in al, dx
|
||||
cmp al, 0xae
|
||||
jne serialiniterror
|
||||
|
||||
|
||||
;; Set serial to normal operation
|
||||
mov dx, SERIAL_PORT+4
|
||||
mov al, 0x0f
|
||||
out dx, al
|
||||
|
||||
popad
|
||||
ret
|
||||
|
||||
serialwrite:
|
||||
pushad
|
||||
cld
|
||||
mov esi, stuff.bootmsg
|
||||
.loop:
|
||||
mov dx, SERIAL_PORT+5
|
||||
.wait:
|
||||
in al, dx
|
||||
and al, 0x20
|
||||
jz .wait
|
||||
lodsb
|
||||
or al, al
|
||||
jz .done
|
||||
mov dx, SERIAL_PORT
|
||||
out dx, al
|
||||
jmp .loop
|
||||
.done:
|
||||
popad
|
||||
ret
|
||||
|
||||
serialiniterror:
|
||||
mov esi, .msg
|
||||
mov edi, 0xb8000
|
||||
mov ah, 64
|
||||
cld
|
||||
.loop:
|
||||
lodsb
|
||||
or al, al
|
||||
jz .done
|
||||
stosw
|
||||
jmp .loop
|
||||
.done:
|
||||
popad
|
||||
ret
|
||||
.msg db "Serial init failed", 0
|
||||
49
src/serial.c
49
src/serial.c
|
|
@ -1,49 +0,0 @@
|
|||
#include "serial.h"
|
||||
#define PORT 0x3f8 // COM1
|
||||
|
||||
static inline void outb(unsigned short port, unsigned char val) {
|
||||
asm volatile ("outb %0, %1" : : "a"(val), "Nd"(port) : "memory");
|
||||
}
|
||||
static inline unsigned char inb(unsigned short port) {
|
||||
unsigned char ret;
|
||||
asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port) : "memory");
|
||||
return ret;
|
||||
}
|
||||
|
||||
int serial_init() {
|
||||
outb(PORT + 1, 0x00); // Disable all interrupts
|
||||
outb(PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
|
||||
outb(PORT + 0, 0x03); // Set divisor to 3 (lo byte) 38400 baud
|
||||
outb(PORT + 1, 0x00); // (hi byte)
|
||||
outb(PORT + 3, 0x03); // 8 bits, no parity, one stop bit
|
||||
outb(PORT + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
|
||||
outb(PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
|
||||
outb(PORT + 4, 0x1E); // Set in loopback mode, test the serial chip
|
||||
outb(PORT + 0, 0xAE); // Test serial chip (send byte 0xAE and check if serial
|
||||
// returns same byte)
|
||||
|
||||
// Check if serial is faulty (i.e: not same byte as sent)
|
||||
if (inb(PORT + 0) != 0xAE) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
// If serial is not faulty set it in normal operation mode
|
||||
// (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
|
||||
outb(PORT + 4, 0x0F);
|
||||
return 0;
|
||||
}
|
||||
static int serial_is_transmit_empty() { return inb(PORT + 5) & 0x20; }
|
||||
|
||||
static void serial_write_char(char chr) {
|
||||
while (serial_is_transmit_empty() == 0);
|
||||
outb(PORT, chr);
|
||||
}
|
||||
|
||||
void serial_write_string(const char* text) {
|
||||
int i = 0;
|
||||
while(text[i]) {
|
||||
serial_write_char(text[i]);
|
||||
i++;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
#ifndef HEADER_SERIAL
|
||||
#define HEADER_SERIAL
|
||||
|
||||
int serial_init(void);
|
||||
void serial_write_string(const char* text);
|
||||
|
||||
#endif
|
||||
100
src/start32.asm
100
src/start32.asm
|
|
@ -1,47 +1,91 @@
|
|||
format binary
|
||||
use32
|
||||
org 0x100000
|
||||
|
||||
MULTIBOOT_HEADER_MAGIC equ 0x1BADB002
|
||||
MULTIBOOT_PAGE_ALIGN equ 1 << 0
|
||||
MULTIBOOT_MEMORY_INFO equ 1 << 1
|
||||
MULTIBOOT_VIDEO_REQUEST equ 0 << 2
|
||||
MULTIBOOT_AOUT_KLUDGE equ 0 << 16
|
||||
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO | MULTIBOOT_VIDEO_REQUEST
|
||||
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO | MULTIBOOT_VIDEO_REQUEST | MULTIBOOT_AOUT_KLUDGE
|
||||
MULTIBOOT_PAGE_ALIGN equ (1 shl 0)
|
||||
MULTIBOOT_MEMORY_INFO equ (1 shl 1)
|
||||
MULTIBOOT_VIDEO_REQUEST equ (0 shl 2)
|
||||
MULTIBOOT_AOUT_KLUDGE equ (1 shl 16)
|
||||
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN or MULTIBOOT_MEMORY_INFO or MULTIBOOT_VIDEO_REQUEST
|
||||
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN or MULTIBOOT_MEMORY_INFO or MULTIBOOT_VIDEO_REQUEST or MULTIBOOT_AOUT_KLUDGE
|
||||
MULTIBOOT_CHECKSUM equ -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
|
||||
|
||||
section .multiboot
|
||||
align 4
|
||||
multiboot:
|
||||
dd MULTIBOOT_HEADER_MAGIC
|
||||
dd MULTIBOOT_HEADER_FLAGS
|
||||
dd MULTIBOOT_CHECKSUM
|
||||
dd 0 ; header address
|
||||
dd 0 ; load address
|
||||
dd 0 ; load end address
|
||||
dd 0 ; bss end address
|
||||
dd 0 ; entry address
|
||||
dd multiboot ; header address
|
||||
dd 0x100000 ; load address
|
||||
dd stack_bottom ; load end address
|
||||
dd stack_top ; bss end address
|
||||
dd start ; entry address
|
||||
dd 0 ; video mode_type (0:fb, 1:txt) (set flags[2]!)
|
||||
dd 1024 ; video width
|
||||
dd 768 ; video height
|
||||
dd 32 ; video depth
|
||||
|
||||
section .bss
|
||||
align 16
|
||||
stack_bottom:
|
||||
resb 16384
|
||||
stack_top:
|
||||
|
||||
section .text
|
||||
global _start
|
||||
extern kmain
|
||||
|
||||
_start:
|
||||
start:
|
||||
; Setup stack
|
||||
mov ebp, stack_bottom
|
||||
mov esp, stack_top
|
||||
|
||||
; Call the main kernel function.
|
||||
push ebx
|
||||
push eax
|
||||
call kmain
|
||||
|
||||
.hang:
|
||||
cmp eax, 0x2badb002
|
||||
jne multibootnomagic
|
||||
|
||||
mov byte [0xb8000], '!'
|
||||
|
||||
mov esi, stuff.bootmsg
|
||||
call serialinit
|
||||
call printbootmsg
|
||||
call serialwrite
|
||||
|
||||
jmp hang
|
||||
|
||||
hang:
|
||||
cli
|
||||
hlt
|
||||
jmp .hang
|
||||
jmp hang
|
||||
|
||||
multibootnomagic:
|
||||
mov esi, .msg
|
||||
mov edi, 0xb8000
|
||||
mov ah, 64
|
||||
cld
|
||||
.loop:
|
||||
lodsb
|
||||
or al, al
|
||||
jz .done
|
||||
stosw
|
||||
jmp .loop
|
||||
.done:
|
||||
jmp hang
|
||||
.msg db "No multiboot magic", 0
|
||||
|
||||
printbootmsg:
|
||||
pushad
|
||||
mov edi, 0xb8000
|
||||
cld
|
||||
.loop:
|
||||
lodsb
|
||||
or al, al
|
||||
jz .done
|
||||
stosb
|
||||
inc edi
|
||||
jmp .loop
|
||||
.done:
|
||||
popad
|
||||
ret
|
||||
|
||||
include "src/serial.asm"
|
||||
|
||||
stuff:
|
||||
.bootmsg db "=== KoalemOS ===", 0
|
||||
|
||||
|
||||
stack_bottom:
|
||||
rb 16384
|
||||
stack_top:
|
||||
|
|
|
|||
97
src/vga.c
97
src/vga.c
|
|
@ -1,97 +0,0 @@
|
|||
#include "vga.h"
|
||||
#define VGA_WIDTH 80
|
||||
#define VGA_HEIGHT 25
|
||||
#define VGA_MEM_ADDR 0xb8000
|
||||
#define CURSOR_HOME (VGA_HEIGHT-1)*VGA_WIDTH
|
||||
#define CURSOR_CHR 177;
|
||||
|
||||
unsigned int cursor_loc = CURSOR_HOME;
|
||||
unsigned char fgcolor;
|
||||
unsigned char bgcolor;
|
||||
unsigned short blank;
|
||||
|
||||
static unsigned char vga_entry_color(enum vga_color fg, enum vga_color bg) {
|
||||
return fg | bg << 4;
|
||||
}
|
||||
unsigned short vga_blank_entry() {
|
||||
return vga_entry_color(fgcolor, bgcolor) << 8;
|
||||
}
|
||||
void draw_cursor(void) {
|
||||
*((unsigned char *)VGA_MEM_ADDR + cursor_loc * 2) = CURSOR_CHR;
|
||||
*((unsigned char *)VGA_MEM_ADDR+1 + cursor_loc * 2) = vga_entry_color(fgcolor, bgcolor);
|
||||
}
|
||||
|
||||
void vga_set_color(enum vga_color fg, enum vga_color bg) {
|
||||
fgcolor = fg;
|
||||
bgcolor = bg;
|
||||
}
|
||||
void vga_init(enum vga_color fg, enum vga_color bg) {
|
||||
vga_set_color(fg, bg);
|
||||
blank = vga_blank_entry();
|
||||
cls();
|
||||
}
|
||||
void cls(void) {
|
||||
int i;
|
||||
for (i=0; i<VGA_HEIGHT*VGA_WIDTH;i++) {
|
||||
*((unsigned short *) VGA_MEM_ADDR+i) = blank;
|
||||
}
|
||||
}
|
||||
void scroll(void) {
|
||||
int y;
|
||||
int x;
|
||||
*((unsigned short *) VGA_MEM_ADDR+cursor_loc) = blank;
|
||||
for (y=0;y<VGA_HEIGHT;y++) {
|
||||
for (x = 0;x<VGA_WIDTH;x++) {
|
||||
*((unsigned short *) VGA_MEM_ADDR+y*VGA_WIDTH+x) = *((unsigned short *) VGA_MEM_ADDR+(y+1)*VGA_WIDTH+x);
|
||||
}
|
||||
}
|
||||
for (x=0;x<VGA_WIDTH;x++) {
|
||||
*((unsigned short *) VGA_MEM_ADDR+CURSOR_HOME+x) = blank;
|
||||
}
|
||||
cursor_loc = CURSOR_HOME;
|
||||
draw_cursor();
|
||||
}
|
||||
void putchar(unsigned char chr) {
|
||||
if (chr == '\n') {
|
||||
scroll();
|
||||
return;
|
||||
}
|
||||
*((unsigned char *) VGA_MEM_ADDR+cursor_loc * 2) = chr;
|
||||
*((unsigned char *) VGA_MEM_ADDR+1+cursor_loc * 2) = vga_entry_color(fgcolor, bgcolor);
|
||||
cursor_loc++;
|
||||
if (cursor_loc >= VGA_HEIGHT*VGA_WIDTH) {
|
||||
scroll();
|
||||
}
|
||||
draw_cursor();
|
||||
}
|
||||
|
||||
void vga_write(const char* text) {
|
||||
int i = 0;
|
||||
while(text[i]) {
|
||||
putchar(text[i]);
|
||||
i++;
|
||||
}
|
||||
}
|
||||
void vga_write_color( const char* text, enum vga_color fg, enum vga_color bg) {
|
||||
unsigned char prevfg = fgcolor;
|
||||
unsigned char prevbg = bgcolor;
|
||||
vga_set_color(fg, bg);
|
||||
vga_write(text);
|
||||
fgcolor = prevfg;
|
||||
bgcolor = prevbg;
|
||||
}
|
||||
void vga_write_line(const char* text) {
|
||||
if (cursor_loc != CURSOR_HOME) {
|
||||
scroll();
|
||||
}
|
||||
vga_write(text);
|
||||
scroll();
|
||||
}
|
||||
void vga_write_line_color(const char* text, enum vga_color fg, enum vga_color bg) {
|
||||
unsigned char prevfg = fgcolor;
|
||||
unsigned char prevbg = bgcolor;
|
||||
vga_set_color(fg, bg);
|
||||
vga_write_line(text);
|
||||
fgcolor = prevfg;
|
||||
bgcolor = prevbg;
|
||||
}
|
||||
24
src/vga.h
24
src/vga.h
|
|
@ -1,24 +0,0 @@
|
|||
#ifndef HEADER_VGA
|
||||
#define HEADER_VGA
|
||||
|
||||
enum vga_color {
|
||||
VGA_COLOR_BLACK = 0,
|
||||
VGA_COLOR_BLUE = 1,
|
||||
VGA_COLOR_GREEN = 2,
|
||||
VGA_COLOR_CYAN = 3,
|
||||
VGA_COLOR_RED = 4,
|
||||
VGA_COLOR_MAGENTA = 5,
|
||||
VGA_COLOR_ORANGE = 6,
|
||||
VGA_COLOR_GREY = 7,
|
||||
VGA_COLOR_GRAY = 7,
|
||||
};
|
||||
|
||||
void cls(void);
|
||||
void vga_init(enum vga_color fg, enum vga_color bg);
|
||||
|
||||
void vga_write(const char* text);
|
||||
void vga_write_color( const char* text, enum vga_color fg, enum vga_color bg);
|
||||
void vga_write_line(const char* text);
|
||||
void vga_write_line_color( const char* text, enum vga_color fg, enum vga_color bg);
|
||||
|
||||
#endif
|
||||
100
src/xtoa.c
100
src/xtoa.c
|
|
@ -1,100 +0,0 @@
|
|||
#include "xtoa.h"
|
||||
char* itoa(int value, int base) {
|
||||
char* result;
|
||||
|
||||
// check that the base if valid
|
||||
if (base < 2 || base > 36) { *result = '\0'; return result; }
|
||||
|
||||
char* ptr = result, *ptr1 = result, tmp_char;
|
||||
int tmp_value;
|
||||
|
||||
do {
|
||||
tmp_value = value;
|
||||
value /= base;
|
||||
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
|
||||
} while ( value );
|
||||
|
||||
// Apply negative sign
|
||||
if (tmp_value < 0) *ptr++ = '-';
|
||||
*ptr-- = '\0';
|
||||
while(ptr1 < ptr) {
|
||||
tmp_char = *ptr;
|
||||
*ptr--= *ptr1;
|
||||
*ptr1++ = tmp_char;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
char* uitoa(unsigned int value, int base) {
|
||||
char* result;
|
||||
|
||||
// check that the base if valid
|
||||
if (base < 2 || base > 36) { *result = '\0'; return result; }
|
||||
|
||||
char* ptr = result, *ptr1 = result, tmp_char;
|
||||
int tmp_value;
|
||||
|
||||
do {
|
||||
tmp_value = value;
|
||||
value /= base;
|
||||
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
|
||||
} while ( value );
|
||||
|
||||
|
||||
*ptr-- = '\0';
|
||||
while(ptr1 < ptr) {
|
||||
tmp_char = *ptr;
|
||||
*ptr--= *ptr1;
|
||||
*ptr1++ = tmp_char;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
char* ltoa(long value, int base) {
|
||||
char* result;
|
||||
|
||||
// check that the base if valid
|
||||
if (base < 2 || base > 36) { *result = '\0'; return result; }
|
||||
|
||||
char* ptr = result, *ptr1 = result, tmp_char;
|
||||
int tmp_value;
|
||||
|
||||
do {
|
||||
tmp_value = value;
|
||||
value /= base;
|
||||
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
|
||||
} while ( value );
|
||||
|
||||
// Apply negative sign
|
||||
if (tmp_value < 0) *ptr++ = '-';
|
||||
*ptr-- = '\0';
|
||||
while(ptr1 < ptr) {
|
||||
tmp_char = *ptr;
|
||||
*ptr--= *ptr1;
|
||||
*ptr1++ = tmp_char;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
char* ultoa(unsigned long value, int base) {
|
||||
char* result;
|
||||
|
||||
// check that the base if valid
|
||||
if (base < 2 || base > 36) { *result = '\0'; return result; }
|
||||
|
||||
char* ptr = result, *ptr1 = result, tmp_char;
|
||||
int tmp_value;
|
||||
|
||||
do {
|
||||
tmp_value = value;
|
||||
value /= base;
|
||||
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
|
||||
} while ( value );
|
||||
|
||||
// Apply negative sign
|
||||
//if (tmp_value < 0) *ptr++ = '-';
|
||||
*ptr-- = '\0';
|
||||
while(ptr1 < ptr) {
|
||||
tmp_char = *ptr;
|
||||
*ptr--= *ptr1;
|
||||
*ptr1++ = tmp_char;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
#ifndef HEADER_XTOA
|
||||
#define HEADER_XTOA
|
||||
|
||||
char* itoa(int value, int base);
|
||||
char* uitoa(unsigned int value, int base);
|
||||
char* ltoa(long value, int base);
|
||||
char* ultoa(unsigned long value, int base);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue