Nigel/BarinkOS
1
0
Fork 0
Code Issues 1 Pull Requests 2 Releases Activity

Basic VBE driver initializes via multiboot info structure, reduced resolution, putPixel function implemented

Browse Source
This commit is contained in:
Nigel Barink 2021-11-23 22:42:32 +01:00
parent 2eca761edc
commit 006c902200
7 changed files with 267 additions and 143 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Makefile
View File

@ -5,7 +5,7 @@ CC = ${HOME}/opt/cross/bin/i686-elf-gcc
CPP = ${HOME}/opt/cross/bin/i686-elf-g++
CFLAGS = -ffreestanding -O2 -Wall -Wextra
OFILES = $(BUILD_DIR)/boot.o $(BUILD_DIR)/kterm.o $(BUILD_DIR)/kernel.o $(BUILD_DIR)/PhysicalMemoryManager.o $(BUILD_DIR)/io.o $(BUILD_DIR)/PageDirectory.o $(BUILD_DIR)/gdtc.o $(BUILD_DIR)/idt.o $(BUILD_DIR)/pic.o $(BUILD_DIR)/string.o
OFILES = $(BUILD_DIR)/boot.o $(BUILD_DIR)/kterm.o $(BUILD_DIR)/kernel.o $(BUILD_DIR)/PhysicalMemoryManager.o $(BUILD_DIR)/io.o $(BUILD_DIR)/vesa.o $(BUILD_DIR)/PageDirectory.o $(BUILD_DIR)/gdtc.o $(BUILD_DIR)/idt.o $(BUILD_DIR)/pic.o $(BUILD_DIR)/string.o
SRC_DIR = src
BUILD_DIR = build
@ -87,3 +87,6 @@ $(BUILD_DIR)/string.o:
$(BUILD_DIR)/PhysicalMemoryManager.o:
$(CPP) -c $(SRC_DIR)/kernel/memory/PhysicalMemoryManager.cpp -o $(BUILD_DIR)/PhysicalMemoryManager.o $(CFLAGS) -fno-exceptions -fno-rtti
$(BUILD_DIR)/vesa.o:
$(CPP) -c $(SRC_DIR)/kernel/vesa.cpp -o $(BUILD_DIR)/vesa.o $(CFLAGS) -fno-exceptions -fno-rtti

4
src/kernel/boot.S
View File

@ -19,8 +19,8 @@
.long 0 # .
.long 0 # unused
.long 0 # set graphics mode
.long 1280 # screen witdh
.long 720 # screen height
.long 800 # screen witdh
.long 600 # screen height
.long 32 # bpp
.section .bss

181
src/kernel/bootcheck.h
View File

@ -3,153 +3,84 @@
#define CHECK_FLAG(flags, bit) ((flags) & (1 <<(bit)))
#include "tty/kterm.h"
#include "vesa.h"
void CheckMBT ( multiboot_info_t* mbt ){
/* Set MBI to the addresss of the multiboot information structure*/
multiboot_info_t * mbi = (multiboot_info_t *) mbt;
/* Set MBI to the addresss of the multiboot information structure*/
multiboot_info_t * mbi = (multiboot_info_t *) mbt;
/* Print out the flags */
printf("flags = 0x%8x\n", (unsigned) mbi->flags);
/* Print out the flags */
printf("flags = 0x%8x\n", (unsigned) mbi->flags);
/* Are mem_* valid? */
if ( CHECK_FLAG(mbi->flags,0)){
printf("mem_lower = %uKB, mem_upper = %uKB\n");
}
/* Are mem_* valid? */
if ( CHECK_FLAG(mbi->flags,0)){
printf("mem_lower = %uKB, mem_upper = %uKB\n");
}
/* is boot device valid ? */
if (CHECK_FLAG (mbi->flags, 1)){
printf("boot_device = 0x0%x\n", (unsigned) mbi->boot_device);
}
/* is boot device valid ? */
if (CHECK_FLAG (mbi->flags, 1)){
printf("boot_device = 0x0%x\n", (unsigned) mbi->boot_device);
}
/* is the command line passed? */
if (CHECK_FLAG ( mbi->flags,2)){
printf("cmdline = %s\n", (char *) mbi->cmdline);
}
/* is the command line passed? */
if (CHECK_FLAG ( mbi->flags,2)){
printf("cmdline = %s\n", (char *) mbi->cmdline);
}
/* Are mods_* valid? */
if(CHECK_FLAG ( mbi->flags, 3)){
multiboot_module_t *mod;
uint32_t i;
/* Are mods_* valid? */
if(CHECK_FLAG ( mbi->flags, 3)){
multiboot_module_t *mod;
uint32_t i;
printf("mods count = %d, mods_addr = 0x%x\n", (int) mbi->mods_count, (int) mbi->mods_addr);
printf("mods count = %d, mods_addr = 0x%x\n", (int) mbi->mods_count, (int) mbi->mods_addr);
for(i = 0, mod = (multiboot_module_t *) mbi->mods_addr; i < mbi->mods_count; i++ , mod++){
printf(" mod start = 0x%x, mod_end = 0x%x, cmdline = %s\n", (unsigned) mod->mod_start, (unsigned) mod->mod_end, (char*) mod->cmdline);
}
}
for(i = 0, mod = (multiboot_module_t *) mbi->mods_addr; i < mbi->mods_count; i++ , mod++){
printf(" mod start = 0x%x, mod_end = 0x%x, cmdline = %s\n", (unsigned) mod->mod_start, (unsigned) mod->mod_end, (char*) mod->cmdline);
}
}
/* Bits 4 and 5 are mutually exclusive! */
if (CHECK_FLAG (mbi->flags, 4) && CHECK_FLAG(mbi->flags, 5)){
printf("Both bits 4 and 5 are set.\n");
return;
}
/* Bits 4 and 5 are mutually exclusive! */
if (CHECK_FLAG (mbi->flags, 4) && CHECK_FLAG(mbi->flags, 5)){
printf("Both bits 4 and 5 are set.\n");
return;
}
/* Is the symbol table of a.out valid? */
if (CHECK_FLAG(mbi->flags, 4)){
multiboot_aout_symbol_table_t *multiboot_aout_sym = &(mbi->u.aout_sym);
/* Is the symbol table of a.out valid? */
if (CHECK_FLAG(mbi->flags, 4)){
multiboot_aout_symbol_table_t *multiboot_aout_sym = &(mbi->u.aout_sym);
printf( "multiboot_aout_symbol_table: tabsize = 0x%0x, strsize = 0x%x, addr = 0x%x\n",
(unsigned) multiboot_aout_sym->tabsize,
(unsigned) multiboot_aout_sym->strsize,
(unsigned) multiboot_aout_sym->addr);
printf( "multiboot_aout_symbol_table: tabsize = 0x%0x, strsize = 0x%x, addr = 0x%x\n",
(unsigned) multiboot_aout_sym->tabsize,
(unsigned) multiboot_aout_sym->strsize,
(unsigned) multiboot_aout_sym->addr);
}
}
/* Is the section header table of ELF valid? */
if (CHECK_FLAG(mbi->flags, 5)){
multiboot_elf_section_header_table_t *multiboot_elf_sec = &(mbi->u.elf_sec);
/* Is the section header table of ELF valid? */
if (CHECK_FLAG(mbi->flags, 5)){
multiboot_elf_section_header_table_t *multiboot_elf_sec = &(mbi->u.elf_sec);
printf("multiboot_elf_sec: num = %u, size = 0x%x, addr = 0x%x, shnd = 0x%x\n",
(unsigned) multiboot_elf_sec->num, (unsigned) multiboot_elf_sec->size,
(unsigned) multiboot_elf_sec->addr, (unsigned) multiboot_elf_sec->shndx);
printf("multiboot_elf_sec: num = %u, size = 0x%x, addr = 0x%x, shnd = 0x%x\n",
(unsigned) multiboot_elf_sec->num, (unsigned) multiboot_elf_sec->size,
(unsigned) multiboot_elf_sec->addr, (unsigned) multiboot_elf_sec->shndx);
}
}
/* Draw diagonal blue line */
if (CHECK_FLAG (mbt->flags, 11)){
printf("Can draw!");
/* Draw diagonal blue line */
if (CHECK_FLAG (mbt->flags, 11)){
printf("Can draw!");
multiboot_uint32_t color;
unsigned i;
void *fb = (void *) (unsigned long) mbt->framebuffer_addr;
switch (mbt->framebuffer_type)
{
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
{
unsigned best_distance, distance;
struct multiboot_color *palette;
palette = (struct multiboot_color *) mbt->framebuffer_palette_addr;
// Init vesa driver
initVBEDevice(mbt);
color = 0;
best_distance = 4*256*256;
// Turn pixel on in the middle of the screen;
putPixel( 50, 50 , 0x00FFFFFF);
for (i = 0; i < mbi->framebuffer_palette_num_colors; i++)
{
distance = (0xff - palette[i].blue) * (0xff - palette[i].blue)
+ palette[i].red * palette[i].red
+ palette[i].green * palette[i].green;
if (distance < best_distance)
{
color = i;
best_distance = distance;
}
}
}
break;
putPixel(VbeModeInfo->width / 2 , VbeModeInfo->height / 2 , 0x00FF0000);
drawLine(50,10, 150, 8, 0x00FF00FF);
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
color = ((1 << mbt->framebuffer_blue_mask_size) - 1)
<< mbt->framebuffer_blue_field_position;
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
color = '\\' | 0x0100;
break;
default:
color = 0xffffffff;
break;
}
for (i = 0; i < mbt->framebuffer_width
&& i < mbt->framebuffer_height; i++)
{
switch (mbt->framebuffer_bpp)
{
case 8:
{
multiboot_uint8_t *pixel = fb + mbt->framebuffer_pitch * i + i;
*pixel = color;
}
break;
case 15:
case 16:
{
multiboot_uint16_t *pixel
= fb + mbt->framebuffer_pitch * i + 2 * i;
*pixel = color;
}
break;
case 24:
{
multiboot_uint32_t *pixel
= fb + mbt->framebuffer_pitch * i + 3 * i;
*pixel = (color & 0xffffff) | (*pixel & 0xff000000);
}
break;
case 32:
{
multiboot_uint32_t *pixel
= fb + mbt->framebuffer_pitch * i + 4 * i;
*pixel = color;
}
break;
}
}
}
}
}

5
src/kernel/kernel.cpp
View File

@ -35,11 +35,6 @@ extern "C" void putPixel(int pos_x, int pos_y, unsigned char VGA_COLOR , unsigne
initGDT();
print_serial("Video mode enabled!\n");
printf_serial("VBE mode: 0x%x\n", mbt->vbe_mode);
printf_serial("width: %d height: %d bpp: %d\n" , mbt->framebuffer_width, mbt->framebuffer_height, mbt->framebuffer_bpp);
kernel_main();

19
src/kernel/serial.h
View File

@ -1,9 +1,10 @@
#pragma once
#include "tty/kterm.h"
#include "io.h"
#define PORT 0x3f8
static int init_serial() {
inline static int init_serial() {
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
@ -25,34 +26,34 @@ static int init_serial() {
return 0;
}
int is_transmit_empty() {
inline int is_transmit_empty() {
return inb(PORT + 5) & 0x20;
}
void write_serial(char a) {
inline void write_serial(char a) {
while (is_transmit_empty() == 0);
outb(PORT,a);
}
int serial_received() {
inline int serial_received() {
return inb(PORT + 5) & 1;
}
char read_serial() {
inline char read_serial() {
while (serial_received() == 0);
return inb(PORT);
}
void print_serial(const char* string ){
inline void print_serial(const char* string ){
for(size_t i = 0; i < strlen(string); i ++){
write_serial(string[i]);
}
}
void printf_serial ( const char *format, ...) {
inline void printf_serial ( const char *format, ...) {
char **arg = (char **)&format;
int c;
@ -113,7 +114,7 @@ void printf_serial ( const char *format, ...) {
}
void test_serial(){
inline void test_serial(){
/** Serial test **/
kterm_writestring("Writing to COM1 serial port:");
init_serial();

128
src/kernel/vesa.cpp Normal file
View File

@ -0,0 +1,128 @@
#include "vesa.h"
VbeInfoBlock* vbeInfo;
vbe_mode_info_structure* VbeModeInfo;
void initVBEDevice(multiboot_info_t* mbt){
print_serial("initVBEDevice");
vbeInfo = (VbeInfoBlock*) mbt->vbe_control_info;
printf_serial("Signature: %s, V0x%x\n", vbeInfo->VbeSignature, vbeInfo->VbeVersion);
VbeModeInfo = (vbe_mode_info_structure*) mbt->vbe_mode_info;
printf_serial("VESA video mode info: Width: %d Height: %d BPP: %d\n", VbeModeInfo->width, VbeModeInfo->height , VbeModeInfo->bpp);
printf_serial("VideoMemory Location: 0x%x \n", VbeModeInfo->framebuffer );
}
void putPixel( int x, int y , uint32_t colour){
printf_serial("putPixel x: %d, y: %d\n", x, y);
///fb + mbt->framebuffer_pitch * y + 4 * x ,NOTE: this calculation is very important
*(uint32_t*) ( VbeModeInfo->framebuffer + VbeModeInfo->pitch * y + 4 * x ) = colour;
}
void drawLine(int x1, int y1, int x2, int y2, uint32_t colour ){
print_serial("drawline\n");
// Bresenham's line algorithm??
int deltaX = x2 - x1;
int deltaY = y2 - y1;
int D = 2 * deltaY - deltaX;
int y = y1;
for ( int x = x1; x < x2; x++){
putPixel(x,y, colour);
if( D > 0){
y +=1;
D = D - 2 * deltaX;
}
D = D + 2 * deltaY;
}
}
void drawRect ( int x, int y, int width, int height, uint32_t colour ){
print_serial("drawRect\n");
}
void blueDiagnalLineTest(multiboot_info_t* mbt){
multiboot_uint32_t color;
unsigned i;
void *fb = (void *) (unsigned long) mbt->framebuffer_addr;
switch (mbt->framebuffer_type)
{
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
{
unsigned best_distance, distance;
struct multiboot_color *palette;
palette = (struct multiboot_color *) mbt->framebuffer_palette_addr;
color = 0;
best_distance = 4*256*256;
for (i = 0; i < mbt->framebuffer_palette_num_colors; i++)
{
distance = (0xff - palette[i].blue) * (0xff - palette[i].blue)
+ palette[i].red * palette[i].red
+ palette[i].green * palette[i].green;
if (distance < best_distance)
{
color = i;
best_distance = distance;
}
}
}
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
color = ((1 << mbt->framebuffer_blue_mask_size) - 1)
<< mbt->framebuffer_blue_field_position;
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
color = '\\' | 0x0100;
break;
default:
color = 0xffffffff;
break;
}
for (i = 0; i < mbt->framebuffer_width
&& i < mbt->framebuffer_height; i++)
{
switch (mbt->framebuffer_bpp)
{
case 8:
{
multiboot_uint8_t *pixel = (multiboot_uint8_t*)fb + mbt->framebuffer_pitch * i + i;
*pixel = color;
}
break;
case 15:
case 16:
{
multiboot_uint16_t *pixel
= (multiboot_uint16_t*)fb + mbt->framebuffer_pitch * i + 2 * i;
*pixel = color;
}
break;
case 24:
{
multiboot_uint32_t *pixel
= (multiboot_uint32_t*)fb + mbt->framebuffer_pitch * i + 3 * i;
*pixel = (color & 0xffffff) | (*pixel & 0xff000000);
}
break;
case 32:
{
multiboot_uint32_t *pixel
= (multiboot_uint32_t*)fb + mbt->framebuffer_pitch * i + 4 * i;
*pixel = color;
}
break;
}
}
}

66
src/kernel/vesa.h Normal file
View File

@ -0,0 +1,66 @@
#pragma once
#include <stdint.h>
#include "bootloader/multiboot.h"
#include "serial.h"
struct vbe_mode_info_structure{
uint16_t attributes;
uint8_t window_a;
uint8_t window_b;
uint16_t granularity;
uint16_t window_size;
uint16_t segment_a;
uint16_t segment_b;
uint32_t win_func_ptr;
uint16_t pitch;
uint16_t width;
uint16_t height;
uint8_t w_char;
uint8_t y_char;
uint8_t planes;
uint8_t bpp;
uint8_t banks;
uint8_t memory_model;
uint8_t bank_size;
uint8_t image_pages;
uint8_t reserved0;
uint8_t red_mask;
uint8_t red_position;
uint8_t green_mask;
uint8_t green_position;
uint8_t blue_mask;
uint8_t blue_position;
uint8_t reserved_mask;
uint8_t reserved_position;
uint8_t direct_color_attributes;
uint32_t framebuffer;
uint32_t off_screen_mem_off;
uint16_t off_screen_mem_size;
uint8_t reserved1[206];
}__attribute__((packed));
struct VbeInfoBlock {
char VbeSignature[4];
uint16_t VbeVersion;
uint16_t OemStringPtr;
uint8_t Capabilities;
uint16_t VideoModePtr;
uint16_t TotalMemory;
}__attribute__((packed));
extern VbeInfoBlock* vbeInfo;
extern vbe_mode_info_structure* VbeModeInfo;
void initVBEDevice(multiboot_info_t* mbt);
void blueDiagnalLineTest(multiboot_info_t* mbt);
// Primitive drawing functions
void putPixel( int x, int y , uint32_t colour);
void drawLine(int x1, int y1, int x2, int y2, uint32_t colour );
void drawRect ( int x, int y, int width, int height, uint32_t colour );