CTAOS v1
This commit is contained in:
2
.gitignore
vendored
2
.gitignore
vendored
@@ -5,7 +5,7 @@
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# Compiled Object files
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*.slo
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*.lo
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*.o
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#*.o
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*.obj
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# Precompiled Headers
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22
compile.bat
Normal file
22
compile.bat
Normal file
@@ -0,0 +1,22 @@
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@echo off
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rem The name of the loader assembly file (without extension, must be .asm):
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set loader_name=loader
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rem NASM and DJGPP executable paths:
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set nasm_path=C:\nasm
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set djgpp_path=C:\DJGPP\bin
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@echo on
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rem Compile loader
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%nasm_path%\nasm.exe -f aout -o %loader_name%.o %loader_name%.asm
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rem Compile main Kernel
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%djgpp_path%\gcc.exe -Wall -O -fstrength-reduce -fomit-frame-pointer -finline-functions -nostdinc -fno-builtin -I./include -c -o main.o main.c
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rem OTHER GCC/NASM SOURCES GO HERE
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@echo on
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%djgpp_path%\ld -T link.ld -o kernel.bin %loader_name%.o main.o
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@echo .
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@echo Done!
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@pause
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copy C:\CTAOS\KERNEL.BIN C:\SHARE
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78
gdt.c
Normal file
78
gdt.c
Normal file
@@ -0,0 +1,78 @@
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#include <system.h>
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/* Defines a GDT entry. We say packed, because it prevents the
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* compiler from doing things that it thinks is best: Prevent
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* compiler "optimization" by packing */
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struct gdt_entry
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{
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unsigned short limit_low;
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unsigned short base_low;
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unsigned char base_middle;
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unsigned char access;
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unsigned char granularity;
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unsigned char base_high;
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} __attribute__((packed));
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/* Special pointer which includes the limit: The max bytes
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* taken up by the GDT, minus 1. Again, this NEEDS to be packed */
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struct gdt_ptr
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{
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unsigned short limit;
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unsigned int base;
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} __attribute__((packed));
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/* Our GDT, with 3 entries, and finally our special GDT pointer */
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struct gdt_entry gdt[3];
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struct gdt_ptr gp;
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/* This will be a function in start.asm. We use this to properly
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* reload the new segment registers */
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extern void gdt_flush();
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/* Setup a descriptor in the Global Descriptor Table */
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void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran)
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{
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/* Setup the descriptor base address */
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gdt[num].base_low = (base & 0xFFFF);
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gdt[num].base_middle = (base >> 16) & 0xFF;
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gdt[num].base_high = (base >> 24) & 0xFF;
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/* Setup the descriptor limits */
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gdt[num].limit_low = (limit & 0xFFFF);
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gdt[num].granularity = ((limit >> 16) & 0x0F);
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/* Finally, set up the granularity and access flags */
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gdt[num].granularity |= (gran & 0xF0);
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gdt[num].access = access;
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}
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/* Should be called by main. This will setup the special GDT
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* pointer, set up the first 3 entries in our GDT, and then
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* finally call gdt_flush() in our assembler file in order
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* to tell the processor where the new GDT is and update the
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* new segment registers */
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void gdt_install()
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{
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/* Setup the GDT pointer and limit */
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gp.limit = (sizeof(struct gdt_entry) * 3) - 1;
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gp.base = &gdt;
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/* Our NULL descriptor */
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gdt_set_gate(0, 0, 0, 0, 0);
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/* The second entry is our Code Segment. The base address
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* is 0, the limit is 4GBytes, it uses 4KByte granularity,
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* uses 32-bit opcodes, and is a Code Segment descriptor.
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* Please check the table above in the tutorial in order
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* to see exactly what each value means */
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gdt_set_gate(1, 0, 0xFFFFFFFF, 0x9A, 0xCF);
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/* The third entry is our Data Segment. It's EXACTLY the
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* same as our code segment, but the descriptor type in
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* this entry's access byte says it's a Data Segment */
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gdt_set_gate(2, 0, 0xFFFFFFFF, 0x92, 0xCF);
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/* Flush out the old GDT and install the new changes! */
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gdt_flush();
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}
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62
idt.c
Normal file
62
idt.c
Normal file
@@ -0,0 +1,62 @@
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#include <system.h>
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/* Defines an IDT entry */
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struct idt_entry
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{
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unsigned short base_lo;
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unsigned short sel;
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unsigned char always0;
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unsigned char flags;
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unsigned short base_hi;
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} __attribute__((packed));
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struct idt_ptr
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{
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unsigned short limit;
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unsigned int base;
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} __attribute__((packed));
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/* Declare an IDT of 256 entries. Although we will only use the
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* first 32 entries in this tutorial, the rest exists as a bit
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* of a trap. If any undefined IDT entry is hit, it normally
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* will cause an "Unhandled Interrupt" exception. Any descriptor
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* for which the 'presence' bit is cleared (0) will generate an
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* "Unhandled Interrupt" exception */
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struct idt_entry idt[256];
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struct idt_ptr idtp;
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/* This exists in 'start.asm', and is used to load our IDT */
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extern void idt_load();
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/* Use this function to set an entry in the IDT. Alot simpler
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* than twiddling with the GDT ;) */
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void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags)
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{
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/* The interrupt routine's base address */
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idt[num].base_lo = (base & 0xFFFF);
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idt[num].base_hi = (base >> 16) & 0xFFFF;
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/* The segment or 'selector' that this IDT entry will use
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* is set here, along with any access flags */
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idt[num].sel = sel;
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idt[num].always0 = 0;
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idt[num].flags = flags;
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}
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/* Installs the IDT */
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void idt_install()
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{
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/* Sets the special IDT pointer up, just like in 'gdt.c' */
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idtp.limit = (sizeof (struct idt_entry) * 256) - 1;
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idtp.base = &idt;
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/* Clear out the entire IDT, initializing it to zeros */
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memset(&idt, 0, sizeof(struct idt_entry) * 256);
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/* Add any new ISRs to the IDT here using idt_set_gate */
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/* Points the processor's internal register to the new IDT */
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idt_load();
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}
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152
include/console.h
Normal file
152
include/console.h
Normal file
@@ -0,0 +1,152 @@
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#include <system.h>
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#ifndef __CONSOLE_H
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#define __CONSOLE_H
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#define _ATTRIB 0x0F
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byte default_background, default_foreground;
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// Change cursor position
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void text_mode_cursor(int x, int y)
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{
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unsigned temp = y*current_mode_width + x;
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outportb (0x3D4, 14);
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outportb (0x3D5, temp >> 8);
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outportb (0x3D4, 15);
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outportb (0x3D5, temp);
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}
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// Set the default colors; max is 0x0F
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void set_default_colors(byte back, byte fore)
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{
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if (back < 0x10) default_background = back;
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if (fore < 0x10) default_foreground = fore;
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}
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// Clear screen, and set font to default font
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void clrscr()
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{
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byte font = default_foreground | (default_background<<4);
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int i = 0;
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for (i = 0; i < current_mode_width*current_mode_height; i++)
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{ TextVideoRam[2*i] = 0;
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TextVideoRam[2*i+1] = font;
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}
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cursor_x = 0; cursor_y = 0;
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}
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void scroll(int n)
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{
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memcpy(TextVideoRam,
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TextVideoRam+(current_mode_width*n*2),
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2*current_mode_width*(current_mode_height - n));
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byte blank = default_foreground | (default_background<<4);
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int i;
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for (i = current_mode_width*(current_mode_height-n);
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i < current_mode_width*current_mode_height; i++){
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TextVideoRam[2*i] = 0;
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TextVideoRam[2*i+1] = blank;
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}
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}
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void _endl()
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{
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cursor_x = 0;
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if (++cursor_y >=25) {
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cursor_y = 24; scroll(1);
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}
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}
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// Put character on screen in specified position; can use different font colors
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void putc_pos_font(int x, int y, char c, byte back, byte fore)
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{
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TextVideoRam[2*(y*current_mode_width+x)] = c;
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TextVideoRam[2*(y*current_mode_width+x)+1] = fore|(back<<4);
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}
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// Put character on screen in specified position; use default font colors
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void putc_pos(int x, int y, char c)
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{
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TextVideoRam[2*(y*current_mode_width+x)] = c;
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}
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// Put character on screen in the current cursor position; different font colors
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void putc_font(char c, byte back, byte fore)
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{
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if (cursor_x > current_mode_width) _endl();
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if (c == '\n') {_endl(); return;};
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TextVideoRam[2*(cursor_y*current_mode_width+cursor_x)] = c;
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TextVideoRam[2*(cursor_y*current_mode_width+cursor_x)+1] = fore|(back<<4);
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cursor_x++;
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}
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// Put character on screen in the current cursor position; default font colors
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void putc(char c)
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{
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if (cursor_x > current_mode_width) _endl();
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if (c == '\n') {_endl(); return;};
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TextVideoRam[2*(cursor_y*current_mode_width+cursor_x)] = c;
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cursor_x++;
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}
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// Put string on screen in specified position; can use different font colors
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void puts_pos_font(int x, int y, char *str, byte back, byte fore)
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{
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int i;
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for (i = 0; str[i] != 0; i++)
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putc_pos_font(x+i, y, str[i], back, fore);
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}
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// Put string on screen in specified position; use default font colors
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void puts_pos(int x, int y, char *str)
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{
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int i;
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for (i = 0; str[i] != 0; i++)
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putc_pos(x+i, y, str[i]);
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}
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void puts(char *str)
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{
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int i;
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for (i = 0; str[i] != 0; i++)
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putc(str[i]);
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}
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void puts_font(char *str, byte back, byte fore)
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{
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int i;
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for (i = 0; str[i] != 0; i++)
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putc_font(str[i], back, fore);
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}
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void put_hex(int x, int y, unsigned int alpha)
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{
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char hex[] = "0123456789ABCDEF";
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char nr[9];
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int i;
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for (i = 7; i >= 0; i--) {
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nr[i] = hex[alpha%16];
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alpha /= 16;
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}
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nr[8] = 0;
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puts_pos(x, y, nr);
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}
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void put_bin (int x, int y, byte xz)
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{
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int i;
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char arr[9] = {0,0,0,0,0,0,0,0,0};
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for(i=7; i>=0; i--) {
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arr[i] = (xz%2) + '0'; xz/=2;
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}
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puts_pos (x, y, arr);
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}
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#endif
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104
include/system.h
Normal file
104
include/system.h
Normal file
@@ -0,0 +1,104 @@
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#ifndef __SYSTEM_H
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#define __SYSTEM_H
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// Data type declarations
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typedef unsigned char byte;
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typedef unsigned short word;
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typedef unsigned int dword;
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/* This defines what the stack looks like after an ISR was running */
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typedef struct
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{
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unsigned int gs, fs, es, ds; /* pushed the segs last */
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unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax; /* pushed by 'pusha' */
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unsigned int int_no, err_code; /* our 'push byte #' and ecodes do this */
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unsigned int eip, cs, eflags, useresp, ss; /* pushed by the processor automatically */
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} regs;
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byte *TextVideoRam;
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int cursor_x, cursor_y;
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int current_mode_width;
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int current_mode_height;
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// System functions declaration
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void system_init();
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void *memcpy(void *dest, const void *src, int count);
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void *memset(void *dest, char val, int count);
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unsigned short *memsetw(unsigned short *dest, unsigned short val, int count);
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int strlen (const char *str);
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byte inportb (word _port);
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byte inb (word _port);
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void outportb (word _port, byte _data);
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void outb (word _port, byte _data) ;
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// GDT, IDT, ISRs, IRQ functions declarations
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void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
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void gdt_install();
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void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
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void idt_install();
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void isrs_install();
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void irq_install_handler(int irq, void (*handler)(regs *r));
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void irq_uninstall_handler(int irq);
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void irq_install();
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// Initialize system
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void *memcpy(void *dest, const void *src, int count)
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{
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const char *sp = (const char *)src;
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char *dp = (char *)dest;
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for(; count != 0; count--) *dp++ = *sp++;
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return dest;
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}
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void *memset(void *dest, char val, int count)
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{
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char *temp = (char *)dest;
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for( ; count != 0; count--) *temp++ = val;
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return dest;
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}
|
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||||
unsigned short *memsetw(unsigned short *dest, unsigned short val, int count)
|
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{
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||||
unsigned short *temp = (unsigned short *)dest;
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for( ; count != 0; count--) *temp++ = val;
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return dest;
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||||
}
|
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|
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// strlen -- Get lenght of str
|
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int strlen (const char *str)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; str[i]!=0; i++) {}
|
||||
return i;
|
||||
}
|
||||
|
||||
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byte inportb (word _port) {
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byte rv;
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||||
__asm__ __volatile__ ("inb %1, %0" : "=a" (rv) : "dN" (_port));
|
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return rv;
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}
|
||||
byte inb (word _port) {
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byte rv;
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__asm__ __volatile__ ("inb %1, %0" : "=a" (rv) : "dN" (_port));
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return rv;
|
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}
|
||||
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||||
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void outportb (word _port, byte _data) {
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__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
|
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void outb (word _port, byte _data) {
|
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__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
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||||
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#endif
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37
init.c
Normal file
37
init.c
Normal file
@@ -0,0 +1,37 @@
|
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#include <system.h>
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||||
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void system_init()
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{
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// Detect if color/monochrome screen
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char c = (*(volatile unsigned short*)0x410)&0x30;
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if (c==0x30) TextVideoRam = (byte *)0xb0000;
|
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else TextVideoRam = (byte *)0xb8000;
|
||||
|
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// Reset cursor, use 80x25 text video mode
|
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current_mode_width = 80;
|
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current_mode_height = 25;
|
||||
cursor_x = cursor_y = 0;
|
||||
|
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// Install GDT, IDT, ISRs and IRQs; Enable interrupts
|
||||
gdt_install();
|
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idt_install();
|
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isrs_install();
|
||||
irq_install();
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__asm__ __volatile__ ("sti");
|
||||
|
||||
// Install PIT timer
|
||||
timer_ticks = 0;
|
||||
irq_install_handler(0, timer_handler);
|
||||
timer_phase (100);
|
||||
|
||||
// Install keyboard
|
||||
kb_modifier_status = 0;
|
||||
kb_lights_status = 0xFF; kb_update_LED();
|
||||
kb_lights_status = 0; kb_update_LED();
|
||||
irq_install_handler(1, kb_handler);
|
||||
|
||||
// mouse_driver();
|
||||
|
||||
|
||||
}
|
||||
118
irq.c
Normal file
118
irq.c
Normal file
@@ -0,0 +1,118 @@
|
||||
#include <system.h>
|
||||
|
||||
/* These are own ISRs that point to our special IRQ handler
|
||||
* instead of the regular 'fault_handler' function */
|
||||
|
||||
extern void irq0();
|
||||
extern void irq1();
|
||||
extern void irq2();
|
||||
extern void irq3();
|
||||
extern void irq4();
|
||||
extern void irq5();
|
||||
extern void irq6();
|
||||
extern void irq7();
|
||||
extern void irq8();
|
||||
extern void irq9();
|
||||
extern void irq10();
|
||||
extern void irq11();
|
||||
extern void irq12();
|
||||
extern void irq13();
|
||||
extern void irq14();
|
||||
extern void irq15();
|
||||
|
||||
/* This array is actually an array of function pointers. We use
|
||||
* this to handle custom IRQ handlers for a given IRQ */
|
||||
void *irq_routines[16] =
|
||||
{
|
||||
0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, 0, 0, 0, 0
|
||||
};
|
||||
|
||||
/* This installs a custom IRQ handler for the given IRQ */
|
||||
void irq_install_handler (int irq, void (*handler)(regs *r))
|
||||
{
|
||||
irq_routines[irq] = handler;
|
||||
}
|
||||
|
||||
void irq_uninstall_handler (int irq)
|
||||
{
|
||||
irq_routines[irq] = 0;
|
||||
}
|
||||
|
||||
|
||||
/* Normally, IRQs 0 to 7 are mapped to entries 8 to 15. This
|
||||
* is a problem in protected mode, because IDT entry 8 is a
|
||||
* Double Fault! Without remapping, every time IRQ0 fires,
|
||||
* you get a Double Fault Exception, which is NOT actually
|
||||
* what's happening. We send commands to the Programmable
|
||||
* Interrupt Controller (PICs - also called the 8259's) in
|
||||
* order to make IRQ0 to 15 be remapped to IDT entries 32 to
|
||||
* 47 */
|
||||
void irq_remap(void)
|
||||
{
|
||||
outportb(0x20, 0x11);
|
||||
outportb(0xA0, 0x11);
|
||||
outportb(0x21, 0x20);
|
||||
outportb(0xA1, 0x28);
|
||||
outportb(0x21, 0x04);
|
||||
outportb(0xA1, 0x02);
|
||||
outportb(0x21, 0x01);
|
||||
outportb(0xA1, 0x01);
|
||||
outportb(0x21, 0x0);
|
||||
outportb(0xA1, 0x0);
|
||||
}
|
||||
|
||||
/* We first remap the interrupt controllers, and then we install
|
||||
* the appropriate ISRs to the correct entries in the IDT. This
|
||||
* is just like installing the exception handlers */
|
||||
void irq_install()
|
||||
{
|
||||
irq_remap();
|
||||
|
||||
idt_set_gate(32, (unsigned)irq0, 0x08, 0x8E);
|
||||
idt_set_gate(33, (unsigned)irq1, 0x08, 0x8E);
|
||||
idt_set_gate(34, (unsigned)irq2, 0x08, 0x8E);
|
||||
idt_set_gate(35, (unsigned)irq3, 0x08, 0x8E);
|
||||
idt_set_gate(36, (unsigned)irq4, 0x08, 0x8E);
|
||||
idt_set_gate(37, (unsigned)irq5, 0x08, 0x8E);
|
||||
idt_set_gate(38, (unsigned)irq6, 0x08, 0x8E);
|
||||
idt_set_gate(39, (unsigned)irq7, 0x08, 0x8E);
|
||||
idt_set_gate(40, (unsigned)irq8, 0x08, 0x8E);
|
||||
idt_set_gate(41, (unsigned)irq9, 0x08, 0x8E);
|
||||
idt_set_gate(42, (unsigned)irq10, 0x08, 0x8E);
|
||||
idt_set_gate(43, (unsigned)irq11, 0x08, 0x8E);
|
||||
idt_set_gate(44, (unsigned)irq12, 0x08, 0x8E);
|
||||
idt_set_gate(45, (unsigned)irq13, 0x08, 0x8E);
|
||||
idt_set_gate(46, (unsigned)irq14, 0x08, 0x8E);
|
||||
idt_set_gate(47, (unsigned)irq15, 0x08, 0x8E);
|
||||
}
|
||||
|
||||
/* Each of the IRQ ISRs point to this function, rather than
|
||||
* the 'fault_handler' in 'isrs.c'. The IRQ Controllers need
|
||||
* to be told when you are done servicing them, so you need
|
||||
* to send them an "End of Interrupt" command (0x20). There
|
||||
* are two 8259 chips: The first exists at 0x20, the second
|
||||
* exists at 0xA0. If the second controller (an IRQ from 8 to
|
||||
* 15) gets an interrupt, you need to acknowledge the
|
||||
* interrupt at BOTH controllers, otherwise, you only send
|
||||
* an EOI command to the first controller. If you don't send
|
||||
* an EOI, you won't raise any more IRQs */
|
||||
void irq_handler (regs *r)
|
||||
{
|
||||
/* This is a blank function pointer */
|
||||
void (*handler)(regs *r);
|
||||
|
||||
/* Find out if we have a custom handler to run for this
|
||||
* IRQ, and then finally, run it */
|
||||
handler = irq_routines[r->int_no - 32];
|
||||
if (handler) handler(r);
|
||||
|
||||
/* If the IDT entry that was invoked was greater than 40
|
||||
* (meaning IRQ8 - 15), then we need to send an EOI to
|
||||
* the slave controller */
|
||||
if (r->int_no >=40) outportb(0x0A, 0x20);
|
||||
|
||||
/* In either case, we need to send an EOI to the master
|
||||
* interrupt controller too */
|
||||
outportb(0x20, 0x20);
|
||||
}
|
||||
163
isrs.c
Normal file
163
isrs.c
Normal file
@@ -0,0 +1,163 @@
|
||||
#include <system.h>
|
||||
#include <console.h>
|
||||
|
||||
extern void isr0();
|
||||
extern void isr1();
|
||||
extern void isr2();
|
||||
extern void isr3();
|
||||
extern void isr4();
|
||||
extern void isr5();
|
||||
extern void isr6();
|
||||
extern void isr7();
|
||||
extern void isr8();
|
||||
extern void isr9();
|
||||
extern void isr10();
|
||||
extern void isr11();
|
||||
extern void isr12();
|
||||
extern void isr13();
|
||||
extern void isr14();
|
||||
extern void isr15();
|
||||
extern void isr16();
|
||||
extern void isr17();
|
||||
extern void isr18();
|
||||
extern void isr19();
|
||||
extern void isr20();
|
||||
extern void isr21();
|
||||
extern void isr22();
|
||||
extern void isr23();
|
||||
extern void isr24();
|
||||
extern void isr25();
|
||||
extern void isr26();
|
||||
extern void isr27();
|
||||
extern void isr28();
|
||||
extern void isr29();
|
||||
extern void isr30();
|
||||
extern void isr31();
|
||||
|
||||
/* This is a very repetitive function... it's not hard, it's
|
||||
* just annoying. As you can see, we set the first 32 entries
|
||||
* in the IDT to the first 32 ISRs. We can't use a for loop
|
||||
* for this, because there is no way to get the function names
|
||||
* that correspond to that given entry. We set the access
|
||||
* flags to 0x8E. This means that the entry is present, is
|
||||
* running in ring 0 (kernel level), and has the lower 5 bits
|
||||
* set to the required '14', which is represented by 'E' in
|
||||
* hex. */
|
||||
void isrs_install()
|
||||
{
|
||||
idt_set_gate(0, (unsigned)isr0, 0x08, 0x8E);
|
||||
idt_set_gate(1, (unsigned)isr1, 0x08, 0x8E);
|
||||
idt_set_gate(2, (unsigned)isr2, 0x08, 0x8E);
|
||||
idt_set_gate(3, (unsigned)isr3, 0x08, 0x8E);
|
||||
idt_set_gate(4, (unsigned)isr4, 0x08, 0x8E);
|
||||
idt_set_gate(5, (unsigned)isr5, 0x08, 0x8E);
|
||||
idt_set_gate(6, (unsigned)isr6, 0x08, 0x8E);
|
||||
idt_set_gate(7, (unsigned)isr7, 0x08, 0x8E);
|
||||
idt_set_gate(8, (unsigned)isr8, 0x08, 0x8E);
|
||||
idt_set_gate(9, (unsigned)isr9, 0x08, 0x8E);
|
||||
idt_set_gate(10, (unsigned)isr10, 0x08, 0x8E);
|
||||
idt_set_gate(11, (unsigned)isr11, 0x08, 0x8E);
|
||||
idt_set_gate(12, (unsigned)isr12, 0x08, 0x8E);
|
||||
idt_set_gate(13, (unsigned)isr13, 0x08, 0x8E);
|
||||
idt_set_gate(14, (unsigned)isr14, 0x08, 0x8E);
|
||||
idt_set_gate(15, (unsigned)isr15, 0x08, 0x8E);
|
||||
idt_set_gate(16, (unsigned)isr16, 0x08, 0x8E);
|
||||
idt_set_gate(17, (unsigned)isr17, 0x08, 0x8E);
|
||||
idt_set_gate(18, (unsigned)isr18, 0x08, 0x8E);
|
||||
idt_set_gate(19, (unsigned)isr19, 0x08, 0x8E);
|
||||
idt_set_gate(20, (unsigned)isr20, 0x08, 0x8E);
|
||||
idt_set_gate(21, (unsigned)isr21, 0x08, 0x8E);
|
||||
idt_set_gate(22, (unsigned)isr22, 0x08, 0x8E);
|
||||
idt_set_gate(23, (unsigned)isr23, 0x08, 0x8E);
|
||||
idt_set_gate(24, (unsigned)isr24, 0x08, 0x8E);
|
||||
idt_set_gate(25, (unsigned)isr25, 0x08, 0x8E);
|
||||
idt_set_gate(26, (unsigned)isr26, 0x08, 0x8E);
|
||||
idt_set_gate(27, (unsigned)isr27, 0x08, 0x8E);
|
||||
idt_set_gate(28, (unsigned)isr28, 0x08, 0x8E);
|
||||
idt_set_gate(29, (unsigned)isr29, 0x08, 0x8E);
|
||||
idt_set_gate(30, (unsigned)isr30, 0x08, 0x8E);
|
||||
idt_set_gate(31, (unsigned)isr31, 0x08, 0x8E);
|
||||
}
|
||||
|
||||
char *exception_messages[] = {
|
||||
"Division By Zero Exception",
|
||||
"Debug Exception",
|
||||
"Non Maskable Interrupt Exception",
|
||||
"Breakpoint Exception",
|
||||
"Into Detected Overflow Exception",
|
||||
"Out of Bounds Exception",
|
||||
"Invalid Opcode Exception",
|
||||
"No Coprocessor",
|
||||
"Double Fault Exception",
|
||||
"Coprocessor Segment Overrun Exception",
|
||||
"Bad TSS Exception",
|
||||
"Segment Not Present Exception",
|
||||
"Stack Fault Exception",
|
||||
"General Protection Fault Exception",
|
||||
"Page Fault Exception",
|
||||
"Unknown Interrupt Exception",
|
||||
"Coprocessor Fault Exception",
|
||||
"Alignment Check Exception",
|
||||
"Machine Check Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception",
|
||||
"Reserved Exception"
|
||||
};
|
||||
|
||||
|
||||
/* All of our Exception handling Interrupt Service Routines will
|
||||
* point to this function. This will tell us what exception has
|
||||
* happened! Right now, we simply halt the system by hitting an
|
||||
* endless loop. All ISRs disable interrupts while they are being
|
||||
* serviced as a 'locking' mechanism to prevent an IRQ from
|
||||
* happening and messing up kernel data structures */
|
||||
void fault_handler(regs *r)
|
||||
{
|
||||
/* Is this a fault whose number is from 0 to 31? */
|
||||
if (r->int_no < 32)
|
||||
{
|
||||
/* Display the description for the Exception that occurred.*/
|
||||
|
||||
// Put on the BSOD screen
|
||||
set_default_colors (0x01, 0x0F); clrscr();
|
||||
puts (" Blue Screen Of Death\n");
|
||||
int i; for (i = 79; i>=0; i--) putc('=');
|
||||
puts_pos_font (15, 2, "A fatal error has occured, CTA OS has been halted.", 0x01, 0x0C);
|
||||
puts_pos_font (10, 4, "gs", 0x01, 0x0B); put_hex(15, 4, r->gs);
|
||||
puts_pos_font (10, 5, "fs", 0x01, 0x0B); put_hex(15, 5, r->fs);
|
||||
puts_pos_font (10, 6, "es", 0x01, 0x0B); put_hex(15, 6, r->es);
|
||||
puts_pos_font (10, 7, "ds", 0x01, 0x0B); put_hex(15, 7, r->ds);
|
||||
|
||||
puts_pos_font (40, 4, "edi", 0x01, 0x0B); put_hex(45, 4, r->edi);
|
||||
puts_pos_font (40, 5, "esi", 0x01, 0x0B); put_hex(45, 5, r->esi);
|
||||
puts_pos_font (40, 6, "ebp", 0x01, 0x0B); put_hex(45, 6, r->ebp);
|
||||
puts_pos_font (40, 7, "esp", 0x01, 0x0B); put_hex(45, 7, r->esp);
|
||||
|
||||
puts_pos_font (10, 9, "eax", 0x01, 0x0B); put_hex(15, 9, r->eax);
|
||||
puts_pos_font (10, 10, "ebx", 0x01, 0x0B); put_hex(15, 10, r->ebx);
|
||||
puts_pos_font (40, 9, "ecx", 0x01, 0x0B); put_hex(45, 9, r->ecx);
|
||||
puts_pos_font (40, 10, "edx", 0x01, 0x0B); put_hex(45, 10, r->edx);
|
||||
|
||||
puts_pos_font (10, 12, "int_no", 0x01, 0x0B); put_hex(17, 12, r->int_no);
|
||||
puts_pos_font (10, 14, "Error code:", 0x01, 0x0B); put_hex(24, 14, r->err_code);
|
||||
puts_pos_font (10, 15, "Error msg: ", 0x01, 0x0B); puts_pos(24, 15, exception_messages[r->int_no]);
|
||||
|
||||
puts_pos_font (10, 17, "eip", 0x01, 0x0B); put_hex(17, 17, r->eip);
|
||||
puts_pos_font (10, 18, "cs", 0x01, 0x0B); put_hex(17, 18, r->cs);
|
||||
puts_pos_font (10, 19, "eflags", 0x01, 0x0B); put_hex(17, 19, r->eflags);
|
||||
puts_pos_font (10, 20, "useresp", 0x01, 0x0B); put_hex(17, 20, r->useresp);
|
||||
puts_pos_font (10, 21, "ss", 0x01, 0x0B); put_hex(17, 21, r->ss);
|
||||
|
||||
puts_pos_font (29, 24, "!!! System Halted !!!", 0x01, 0x0C);
|
||||
for (;;);
|
||||
}
|
||||
}
|
||||
BIN
kernel.bin
Normal file
BIN
kernel.bin
Normal file
Binary file not shown.
209
keyus.c
Normal file
209
keyus.c
Normal file
@@ -0,0 +1,209 @@
|
||||
unsigned char kbdus[128] =
|
||||
{
|
||||
0, 27, '1', '2', '3', '4', '5', '6', '7', '8', /* 9 */
|
||||
'9', '0', '-', '=', '\b', /* Backspace */
|
||||
'\t', /* Tab */
|
||||
'q', 'w', 'e', 'r', /* 19 */
|
||||
't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', /* Enter key */
|
||||
0, /* 29 - Control */
|
||||
'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* 39 */
|
||||
'\'', '`', 0, /* Left shift */
|
||||
'\\', 'z', 'x', 'c', 'v', 'b', 'n', /* 49 */
|
||||
'm', ',', '.', '/', 0, /* Right shift */
|
||||
'*',
|
||||
0, /* Alt */
|
||||
' ', /* Space bar */
|
||||
0, /* Caps lock */
|
||||
0, /* 59 - F1 key ... > */
|
||||
0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, /* < ... F10 */
|
||||
0, /* 69 - Num lock*/
|
||||
0, /* Scroll Lock */
|
||||
0, /* Home key */
|
||||
0, /* Up Arrow */
|
||||
0, /* Page Up */
|
||||
'-',
|
||||
0, /* Left Arrow */
|
||||
0,
|
||||
0, /* Right Arrow */
|
||||
'+',
|
||||
0, /* 79 - End key*/
|
||||
0, /* Down Arrow */
|
||||
0, /* Page Down */
|
||||
0, /* Insert Key */
|
||||
0, /* Delete Key */
|
||||
0, 0, 0,
|
||||
0, /* F11 Key */
|
||||
0, /* F12 Key */
|
||||
0, /* All other keys are undefined */
|
||||
};
|
||||
|
||||
unsigned char kbdus_shift[128] =
|
||||
{
|
||||
0, 27, '!', '@', '#', '$', '%', '^', '&', '*', /* 9 */
|
||||
'(', ')', '_', '+', '\b', /* Backspace */
|
||||
'\t', /* Tab */
|
||||
'Q', 'W', 'E', 'R', /* 19 */
|
||||
'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', /* Enter key */
|
||||
0, /* 29 - Control */
|
||||
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* 39 */
|
||||
'\"', '~', 0, /* Left shift */
|
||||
'|', 'Z', 'X', 'C', 'V', 'B', 'N', /* 49 */
|
||||
'M', '<', '>', '?', 0, /* Right shift */
|
||||
'*',
|
||||
0, /* Alt */
|
||||
' ', /* Space bar */
|
||||
0, /* Caps lock */
|
||||
0, /* 59 - F1 key ... > */
|
||||
0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, /* < ... F10 */
|
||||
0, /* 69 - Num lock*/
|
||||
0, /* Scroll Lock */
|
||||
0, /* Home key */
|
||||
0, /* Up Arrow */
|
||||
0, /* Page Up */
|
||||
'-',
|
||||
0, /* Left Arrow */
|
||||
0,
|
||||
0, /* Right Arrow */
|
||||
'+',
|
||||
0, /* 79 - End key*/
|
||||
0, /* Down Arrow */
|
||||
0, /* Page Down */
|
||||
0, /* Insert Key */
|
||||
0, /* Delete Key */
|
||||
0, 0, 0,
|
||||
0, /* F11 Key */
|
||||
0, /* F12 Key */
|
||||
0, /* All other keys are undefined */
|
||||
};
|
||||
|
||||
|
||||
|
||||
/* kb_modifier_status:
|
||||
BIT | Description
|
||||
----+-----------------------------------
|
||||
0 | Left Shift
|
||||
1 | Right Shift
|
||||
2 | Left Alt
|
||||
3 | Right Alt
|
||||
4 | Left CTRL
|
||||
5 | Right CTRL
|
||||
6 | Fake Shift
|
||||
7 | Special */
|
||||
unsigned char kb_modifier_status;
|
||||
|
||||
/* kb_lights_status
|
||||
BIT | Description
|
||||
----+-----------------------------------
|
||||
0 | SCROLLOCK
|
||||
1 | NUMLOCK
|
||||
2 | CAPSLOCK */
|
||||
unsigned char kb_lights_status;
|
||||
|
||||
void kb_update_LED()
|
||||
{
|
||||
while ((inportb (0x64)&2)!=0);
|
||||
outportb (0x60, 0xED);
|
||||
|
||||
while ((inportb (0x64)&2)!=0);
|
||||
outportb (0x60, kb_lights_status);
|
||||
}
|
||||
|
||||
/* kb_toggle_LED
|
||||
Toggle NUM/CAPS/SCROLL LOCK LEDs. 0 to ignore. If all 0, reset; */
|
||||
void kb_toggle_LED(int NUM, int CAPS, int SCROLL)
|
||||
{
|
||||
if (NUM) kb_lights_status ^= 1<<1;
|
||||
if (CAPS) kb_lights_status ^= 1<<2;
|
||||
if (SCROLL) kb_lights_status ^= 1;
|
||||
if ((!NUM) && (!CAPS) && (!SCROLL)) kb_lights_status = 0;
|
||||
kb_update_LED();
|
||||
}
|
||||
|
||||
byte prev, scancode;
|
||||
void kb_handler(regs *r) {
|
||||
scancode = inportb(0x60);
|
||||
|
||||
puts_pos(0, 0, "Key Pressed ");put_hex(30, 0, scancode);
|
||||
|
||||
switch (scancode) {
|
||||
// Special
|
||||
case 0x0E: kb_modifier_status |= 1<<7;
|
||||
break;
|
||||
|
||||
// Left Shift or fake shift make
|
||||
case 0x2A: if (kb_modifier_status && 128) kb_modifier_status |= 1<<6;
|
||||
else kb_modifier_status |= 1;
|
||||
break;
|
||||
|
||||
// Left Shift or fake shift release
|
||||
case 0xAA: if (kb_modifier_status && 128) kb_modifier_status &= (1<<6) ^0xFF;
|
||||
else kb_modifier_status &= 1 ^0xFF;
|
||||
break;
|
||||
|
||||
// Right Shift make
|
||||
case 0x36: kb_modifier_status |= 1<<1;
|
||||
break;
|
||||
|
||||
// Right shift release
|
||||
case 0xB6: kb_modifier_status &= (1<<1) ^0xFF;
|
||||
break;
|
||||
|
||||
// Left Alt or Right Alt make
|
||||
case 0x38: if (kb_modifier_status && 128) kb_modifier_status |= 1<<3;
|
||||
else kb_modifier_status |= 1<<2;
|
||||
break;
|
||||
|
||||
// Left Alt or Right Alt release
|
||||
case 0xB8: if (kb_modifier_status && 128) kb_modifier_status &= (1<<3) ^0xFF;
|
||||
else kb_modifier_status &= (1<<2) ^0xFF;
|
||||
break;
|
||||
|
||||
// Left Ctrl or Right Ctrl make
|
||||
case 0x1D: if (kb_modifier_status && 128) kb_modifier_status |= 1<<5;
|
||||
else kb_modifier_status |= 1<<4;
|
||||
break;
|
||||
|
||||
// Left Ctrl or Right Ctrl release
|
||||
case 0x9D: if (kb_modifier_status && 128) kb_modifier_status &= (1<<5) ^0xFF;
|
||||
else kb_modifier_status &= (1<<5) ^0xFF;
|
||||
break;
|
||||
|
||||
// Caps, Num and Scroll (in this order)
|
||||
case 0x3A: kb_toggle_LED (0,1,0); break;
|
||||
case 0x45: kb_toggle_LED (1,0,0); break;
|
||||
case 0x46: kb_toggle_LED (0,0,1); break;
|
||||
|
||||
default: if (scancode & 0x80) break;
|
||||
if (scancode != prev) kb_modifier_status &= (1<<7) ^0xFF;
|
||||
if ((kb_modifier_status && 1) || (kb_modifier_status && 2))
|
||||
putc_pos(50, 0, kbdus_shift[scancode]);
|
||||
else putc_pos (50, 0, kbdus[scancode]);
|
||||
break;
|
||||
}
|
||||
|
||||
outportb(0x20, 0x20);
|
||||
}
|
||||
|
||||
|
||||
char kb_getch()
|
||||
{
|
||||
regs *r = 0;
|
||||
do {
|
||||
prev = scancode; kb_handler(r); }
|
||||
while (prev == scancode || prev+0x80 == scancode);
|
||||
|
||||
|
||||
if ((kb_modifier_status && 1) || (kb_modifier_status && 2))
|
||||
return kbdus_shift[scancode];
|
||||
|
||||
return kbdus[scancode];
|
||||
}
|
||||
|
||||
void kb_get_status()
|
||||
{
|
||||
byte a = inportb(0x64);
|
||||
puts_pos(0, 8, "KeyBrd Status: ");
|
||||
put_bin(0, 9, a);
|
||||
}
|
||||
25
link.ld
Normal file
25
link.ld
Normal file
@@ -0,0 +1,25 @@
|
||||
OUTPUT_FORMAT("binary")
|
||||
ENTRY(start)
|
||||
phys = 0x00100000;
|
||||
SECTIONS
|
||||
{
|
||||
.text phys : AT(phys) {
|
||||
code = .;
|
||||
*(.text)
|
||||
*(.rodata)
|
||||
. = ALIGN(4096);
|
||||
}
|
||||
.data : AT(phys + (data - code))
|
||||
{
|
||||
data = .;
|
||||
*(.data)
|
||||
. = ALIGN(4096);
|
||||
}
|
||||
.bss : AT(phys + (bss - code))
|
||||
{
|
||||
bss = .;
|
||||
*(.bss)
|
||||
. = ALIGN(4096);
|
||||
}
|
||||
end = .;
|
||||
}
|
||||
449
loader.asm
Normal file
449
loader.asm
Normal file
@@ -0,0 +1,449 @@
|
||||
[BITS 32]
|
||||
global start
|
||||
start: mov esp, _sys_stack ; This points the stack to our new stack area
|
||||
jmp stublet
|
||||
|
||||
|
||||
; This part MUST be 4byte aligned, so we solve that issue using 'ALIGN 4'
|
||||
ALIGN 4
|
||||
mboot:
|
||||
; Multiboot macros to make a few lines later more readable
|
||||
MULTIBOOT_PAGE_ALIGN equ 1<<0
|
||||
MULTIBOOT_MEMORY_INFO equ 1<<1
|
||||
MULTIBOOT_AOUT_KLUDGE equ 1<<16
|
||||
MULTIBOOT_HEADER_MAGIC equ 0x1BADB002
|
||||
MULTIBOOT_HEADER_FLAGS equ MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO | MULTIBOOT_AOUT_KLUDGE
|
||||
MULTIBOOT_CHECKSUM equ -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
|
||||
EXTERN code, bss, end
|
||||
|
||||
; This is the GRUB Multiboot header. A boot signature
|
||||
dd MULTIBOOT_HEADER_MAGIC
|
||||
dd MULTIBOOT_HEADER_FLAGS
|
||||
dd MULTIBOOT_CHECKSUM
|
||||
|
||||
; AOUT kludge - must be physical addresses. Make a note of these:
|
||||
; The linker script fills in the data for these ones!
|
||||
dd mboot
|
||||
dd code
|
||||
dd bss
|
||||
dd end
|
||||
dd start
|
||||
|
||||
; This is an endless loop here. Make a note of this: Later on, we
|
||||
; will insert an 'extern _main', followed by 'call _main', right
|
||||
; before the 'jmp $'.
|
||||
stublet:
|
||||
extern _main
|
||||
call _main
|
||||
jmp $
|
||||
|
||||
|
||||
; !!! GDT !!!
|
||||
; This will set up our new segment registers. We need to do
|
||||
; something special in order to set CS. We do what is called a
|
||||
; far jump. A jump that includes a segment as well as an offset.
|
||||
; This is declared in C as 'extern void gdt_flush();'
|
||||
|
||||
global _gdt_flush ; Allows the C code to link to this
|
||||
extern _gp ; Says that '_gp' is in another file
|
||||
_gdt_flush:
|
||||
lgdt [_gp] ; Load the GDT with our '_gp' which is a special pointer
|
||||
mov ax, 0x10 ; 0x10 is the offset in the GDT to our data segment
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov ss, ax
|
||||
jmp 0x08:flush2 ; 0x08 is the offset to our code segment: Far jump!
|
||||
flush2:
|
||||
ret ; Returns back to the C code!
|
||||
|
||||
|
||||
; !!! IDT !!!
|
||||
; Loads the IDT defined in '_idtp'
|
||||
global _idt_load
|
||||
extern _idtp
|
||||
_idt_load:
|
||||
lidt [_idtp]
|
||||
ret
|
||||
|
||||
; !!! ISRs !!!
|
||||
global _isr0
|
||||
global _isr1
|
||||
global _isr2
|
||||
global _isr3
|
||||
global _isr4
|
||||
global _isr5
|
||||
global _isr6
|
||||
global _isr7
|
||||
global _isr8
|
||||
global _isr9
|
||||
global _isr10
|
||||
global _isr11
|
||||
global _isr12
|
||||
global _isr13
|
||||
global _isr14
|
||||
global _isr15
|
||||
global _isr16
|
||||
global _isr17
|
||||
global _isr18
|
||||
global _isr19
|
||||
global _isr20
|
||||
global _isr21
|
||||
global _isr22
|
||||
global _isr23
|
||||
global _isr24
|
||||
global _isr25
|
||||
global _isr26
|
||||
global _isr27
|
||||
global _isr28
|
||||
global _isr29
|
||||
global _isr30
|
||||
global _isr31
|
||||
|
||||
_isr0:
|
||||
cli
|
||||
push byte 0; A normal ISR stub that pops a dummy error code to keep a
|
||||
; uniform stack frame
|
||||
push byte 0
|
||||
jmp isr_common_stub
|
||||
_isr1:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 1
|
||||
jmp isr_common_stub
|
||||
_isr2:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 2
|
||||
jmp isr_common_stub
|
||||
_isr3:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 3
|
||||
jmp isr_common_stub
|
||||
_isr4:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 4
|
||||
jmp isr_common_stub
|
||||
_isr5:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 5
|
||||
jmp isr_common_stub
|
||||
_isr6:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 6
|
||||
jmp isr_common_stub
|
||||
_isr7:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 7
|
||||
jmp isr_common_stub
|
||||
_isr8:
|
||||
cli
|
||||
push byte 8
|
||||
jmp isr_common_stub
|
||||
_isr9:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 9
|
||||
jmp isr_common_stub
|
||||
_isr10:
|
||||
cli
|
||||
push byte 10
|
||||
jmp isr_common_stub
|
||||
_isr11:
|
||||
cli
|
||||
push byte 11
|
||||
jmp isr_common_stub
|
||||
_isr12:
|
||||
cli
|
||||
push byte 12
|
||||
jmp isr_common_stub
|
||||
_isr13:
|
||||
cli
|
||||
push byte 13
|
||||
jmp isr_common_stub
|
||||
_isr14:
|
||||
cli
|
||||
push byte 14
|
||||
jmp isr_common_stub
|
||||
_isr15:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 15
|
||||
jmp isr_common_stub
|
||||
_isr16:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 16
|
||||
jmp isr_common_stub
|
||||
_isr17:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 17
|
||||
jmp isr_common_stub
|
||||
_isr18:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 18
|
||||
jmp isr_common_stub
|
||||
_isr19:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 19
|
||||
jmp isr_common_stub
|
||||
_isr20:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 20
|
||||
jmp isr_common_stub
|
||||
_isr21:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 21
|
||||
jmp isr_common_stub
|
||||
_isr22:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 22
|
||||
jmp isr_common_stub
|
||||
_isr23:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 23
|
||||
jmp isr_common_stub
|
||||
_isr24:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 24
|
||||
jmp isr_common_stub
|
||||
_isr25:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 25
|
||||
jmp isr_common_stub
|
||||
_isr26:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 26
|
||||
jmp isr_common_stub
|
||||
_isr27:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 27
|
||||
jmp isr_common_stub
|
||||
_isr28:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 28
|
||||
jmp isr_common_stub
|
||||
_isr29:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 29
|
||||
jmp isr_common_stub
|
||||
_isr30:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 30
|
||||
jmp isr_common_stub
|
||||
_isr31:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 31
|
||||
jmp isr_common_stub
|
||||
|
||||
extern _fault_handler
|
||||
|
||||
isr_common_stub:
|
||||
pusha
|
||||
push ds
|
||||
push es
|
||||
push fs
|
||||
push gs
|
||||
mov ax, 0x10 ; Load the Kernel Data Segment descriptor!
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov eax, esp ; Push us the stack
|
||||
push eax
|
||||
mov eax, _fault_handler
|
||||
call eax ; A special call, preserves the 'eip' register
|
||||
pop eax
|
||||
pop gs
|
||||
pop fs
|
||||
pop es
|
||||
pop ds
|
||||
popa
|
||||
add esp, 8 ; Cleans up the pushed error code and pushed ISR number
|
||||
iret ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP!
|
||||
|
||||
|
||||
; !!! IRQ !!!
|
||||
global _irq0
|
||||
global _irq1
|
||||
global _irq2
|
||||
global _irq3
|
||||
global _irq4
|
||||
global _irq5
|
||||
global _irq6
|
||||
global _irq7
|
||||
global _irq8
|
||||
global _irq9
|
||||
global _irq10
|
||||
global _irq11
|
||||
global _irq12
|
||||
global _irq13
|
||||
global _irq14
|
||||
global _irq15
|
||||
|
||||
; 32: IRQ0
|
||||
_irq0:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 32; Note that these don't push an error code on the stack:
|
||||
; We need to push a dummy error code
|
||||
jmp irq_common_stub
|
||||
|
||||
; 33: IRQ1
|
||||
_irq1:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 33
|
||||
jmp irq_common_stub
|
||||
|
||||
; 34: IRQ2
|
||||
_irq2:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 34
|
||||
jmp irq_common_stub
|
||||
|
||||
; 35: IRQ3
|
||||
_irq3:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 35
|
||||
jmp irq_common_stub
|
||||
|
||||
; 36: IRQ4
|
||||
_irq4:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 36
|
||||
jmp irq_common_stub
|
||||
|
||||
; 37: IRQ5
|
||||
_irq5:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 37
|
||||
jmp irq_common_stub
|
||||
|
||||
; 38: IRQ6
|
||||
_irq6:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 38
|
||||
jmp irq_common_stub
|
||||
|
||||
; 39: IRQ7
|
||||
_irq7:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 39
|
||||
jmp irq_common_stub
|
||||
|
||||
; 40: IRQ8
|
||||
_irq8:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 40
|
||||
jmp irq_common_stub
|
||||
; 41: IRQ9
|
||||
_irq9:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 41
|
||||
jmp irq_common_stub
|
||||
|
||||
; 42: IRQ10
|
||||
_irq10:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 42
|
||||
jmp irq_common_stub
|
||||
|
||||
; 43: IRQ11
|
||||
_irq11:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 43
|
||||
jmp irq_common_stub
|
||||
|
||||
; 44: IRQ12
|
||||
_irq12:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 44
|
||||
jmp irq_common_stub
|
||||
|
||||
; 45: IRQ13
|
||||
_irq13:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 45
|
||||
jmp irq_common_stub
|
||||
|
||||
; 46: IRQ14
|
||||
_irq14:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 46
|
||||
jmp irq_common_stub
|
||||
|
||||
; 47: IRQ15
|
||||
_irq15:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 47
|
||||
jmp irq_common_stub
|
||||
|
||||
extern _irq_handler
|
||||
|
||||
; This is a stub that we have created for IRQ based ISRs. This calls
|
||||
; '_irq_handler' in our C code. We need to create this in an 'irq.c'
|
||||
irq_common_stub:
|
||||
pusha
|
||||
push ds
|
||||
push es
|
||||
push fs
|
||||
push gs
|
||||
mov ax, 0x10
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov eax, esp
|
||||
push eax
|
||||
mov eax, _irq_handler
|
||||
call eax
|
||||
pop eax
|
||||
pop gs
|
||||
pop fs
|
||||
pop es
|
||||
pop ds
|
||||
popa
|
||||
add esp, 8
|
||||
iret
|
||||
|
||||
|
||||
|
||||
SECTION .bss
|
||||
resb 8192 ; This reserves 8KBytes of memory here
|
||||
_sys_stack:
|
||||
65
main.c
Normal file
65
main.c
Normal file
@@ -0,0 +1,65 @@
|
||||
#include <system.h>
|
||||
#include <console.h>
|
||||
#include "gdt.c"
|
||||
#include "idt.c"
|
||||
#include "isrs.c"
|
||||
#include "irq.c"
|
||||
#include "timer.c"
|
||||
#include "keyus.c"
|
||||
#include "init.c"
|
||||
|
||||
|
||||
/*void put_line_scroll(int line, char c)
|
||||
{
|
||||
int i = 0;
|
||||
while (TextVideoRam[2*(80*line+i)] != 0 && i<=80) ++i;
|
||||
if (i>78) {
|
||||
memcpy(TextVideoRam + (2*80*line), TextVideoRam + (2*80*line) + 2, (i+1)*2);
|
||||
}
|
||||
putc_pos(i, line, c);
|
||||
}*/
|
||||
|
||||
|
||||
int main()
|
||||
{
|
||||
system_init();
|
||||
set_default_colors (0x07, 0x04);
|
||||
clrscr();
|
||||
|
||||
int i;
|
||||
for (i=0;i<80;i++) putc_pos_font (i, 0, ' ', 0x02, 0x0F);
|
||||
puts_pos_font (60, 0, "Uptime:", 0x02, 0x0E); cursor_y++;
|
||||
|
||||
// Do other stuff
|
||||
puts ("Testing puts...\nAnd this shoudl be new line\n");
|
||||
puts_font ("And this should be colored in another color ", 0x02, 0x0F);
|
||||
puts ("<- colored font should be right about heree");
|
||||
|
||||
puts_pos (0, 23, "This text should be starting in position (0, 23)");
|
||||
puts_pos_font (0, 23, "THIS", 0x00, 0x09);
|
||||
|
||||
puts_pos (5, 20, "<- The cursor should be blinking right here");
|
||||
putc_pos_font (3, 20, 0, 0x04, 0x0F);
|
||||
text_mode_cursor(3, 20);
|
||||
|
||||
|
||||
while (1) {
|
||||
kb_get_status();
|
||||
|
||||
put_bin(60, 15, kb_modifier_status);
|
||||
puts_pos_font (60, 16, "LShift", 0x07, 0x08 - (kb_modifier_status&1)*0x06);
|
||||
puts_pos_font (60, 17, "RShift", 0x07, 0x08 - (kb_modifier_status&2)*0x06);
|
||||
puts_pos_font (60, 18, "LAlt", 0x07, 0x08 - (kb_modifier_status&4)*0x06);
|
||||
puts_pos_font (60, 19, "RAlt", 0x07, 0x08 - (kb_modifier_status&8)*0x06);
|
||||
puts_pos_font (60, 20, "LCtrl", 0x07, 0x08 - (kb_modifier_status&16)*0x06);
|
||||
puts_pos_font (60, 21, "RCtrl", 0x07, 0x08 - (kb_modifier_status&32)*0x06);
|
||||
puts_pos_font (60, 22, "FakeShift", 0x07, 0x08 - (kb_modifier_status&64)*0x06);
|
||||
puts_pos_font (60, 23, "Special", 0x07, 0x08 - (kb_modifier_status&128)*0x06);
|
||||
|
||||
putc (kb_getch());
|
||||
}
|
||||
|
||||
// do nothing
|
||||
for(;;);
|
||||
return 0;
|
||||
}
|
||||
52
timer.c
Normal file
52
timer.c
Normal file
@@ -0,0 +1,52 @@
|
||||
#include<system.h>
|
||||
int timer_ticks = 0;
|
||||
int timer_hz;
|
||||
|
||||
void timer_phase(int hz)
|
||||
{
|
||||
int divisor = 1193180/hz; // Calculate the divisor
|
||||
outportb(0x43, 0x36); // Set our command byte 0x36
|
||||
outportb(0x40, divisor&0xFF); // Set low byte
|
||||
outportb(0x40, divisor>>8); // Set high byte
|
||||
timer_hz = hz;
|
||||
}
|
||||
|
||||
void timer_clock (int x, int y, int secs)
|
||||
{
|
||||
int s, m, h;
|
||||
char arr[9] = {0,0,0,0,0,0,0,0,0};
|
||||
|
||||
s = secs%60;
|
||||
m = (secs/60)%60;
|
||||
h = secs/3600;
|
||||
|
||||
arr[0] = (h/10)%10 + '0'; if (arr[0]=='0') arr[0] = ' ';
|
||||
arr[1] = h%10 + '0';
|
||||
|
||||
arr[3] = (m/10) + '0';
|
||||
arr[4] = m%10 + '0';
|
||||
|
||||
arr[6] = s/10 + '0';
|
||||
arr[7] = s%10 + '0';
|
||||
|
||||
if (secs%2 == 0) {
|
||||
arr[2] = ' ';
|
||||
arr[5] = ' ';
|
||||
}
|
||||
else {
|
||||
arr[2] = ':';
|
||||
arr[5] = ':';
|
||||
}
|
||||
|
||||
puts_pos(x, y, arr);
|
||||
}
|
||||
|
||||
|
||||
void timer_handler(regs *r)
|
||||
{
|
||||
timer_ticks++;
|
||||
|
||||
if (timer_ticks % timer_hz) {
|
||||
timer_clock (70, 0, timer_ticks / timer_hz);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user