summaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/console.c38
-rw-r--r--kernel/console.h23
-rw-r--r--kernel/kernel.c134
3 files changed, 79 insertions, 116 deletions
diff --git a/kernel/console.c b/kernel/console.c
index d5d4573..f17dbe3 100644
--- a/kernel/console.c
+++ b/kernel/console.c
@@ -1,11 +1,24 @@
-#include <stdint.h>
-
#include "console.h"
static int posx=0;
static int posy=0;
-void print_nextline()
+void scr_clear()
+{
+ int x,y;
+
+ for(x=0;x<SCR_WIDTH;x++)
+ for(y=0;y<SCR_HEIGHT;y++)
+ {
+ print_char_col(x,y," ",SCR_BLACK);
+
+ }
+
+ posx=posy=0;
+
+}
+//TODO
+void scr_nextline()
{
int i,x;
@@ -30,8 +43,9 @@ void print_nextline()
}
}
-void print_hex(uint16_t val)
+void scr_put_hex(uint16_t val)
{
+
int i;
print_char_col(posx,posy,'0',SCR_WHITE);
@@ -43,34 +57,20 @@ void print_hex(uint16_t val)
{
print_single_hex((val&0xf000)>>12);
val=val << 4;
-
}
}
-void print_string(char *str)
+void scr_put_string(char *str)
{
-
while(*str!=0)
{
print_char(posx++,posy,*(str++));
}
}
-void console_clear_screen()
-{
- int x,y;
- for(x=0;x<SCR_WIDTH;x++)
- for(y=0;y<SCR_WIDTH;y++)
- {
- print_char_col(x,y," ",SCR_BLACK);
-
- }
- posx=posy=0;
-
-}
diff --git a/kernel/console.h b/kernel/console.h
index b834289..a8b2b86 100644
--- a/kernel/console.h
+++ b/kernel/console.h
@@ -1,3 +1,8 @@
+#ifndef CONSOLE_H
+#define CONSOLE_H
+
+#include <stdint.h> //needed for uint16_t
+
#define SCR_VIDEOMEM 0xb8000
#define SCR_WIDTH 80
@@ -13,17 +18,13 @@
#define SCR_RED 0x4
// TODO: more colors here...
-
# define SCR_WHITE 0xf
//autoscroll
-void print_nextline();
-void print_string(char *str);
-void print_hex(uint16_t val);
-void console_clear_screen();
-
-//no autoscroll
-void print_str(int x,int y,char *str);
-void print_str_col(int x,int y,char *str, char col);
-void print_char(int x, int y, char c);
-void print_char_col(int x, int y, char c, char col);
+void scr_clear();
+void scr_nextline();
+void scr_put_string(char *str);
+void scr_put_hex(uint16_t val);
+//void scr_put_int(uint16_t int);
+
+#endif
diff --git a/kernel/kernel.c b/kernel/kernel.c
index 584b5c8..bdf1ec1 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -1,8 +1,19 @@
-#include <stdint.h>
+#include <stdint.h>
#include "kernel.h" // general kernel config
#include "console.h" // this will allow us to write to screen
+// garbage
+int unhandled=0;
+
+char col=100;
+char col2=0;
+
+int cursor=0;
+char last_code=0;
+
+uint8_t kb_in;
+
//// interrupt stuff /////
//
#define INT_MAX 255
@@ -28,23 +39,13 @@ static struct idt_desc
} idtd;
-int unhandled=0;
-
-char col=100;
-char col2=0;
-
-int cursor=0;
-char last_code=0;
-
-uint8_t kb_in;
-
void int_def_handler()
{
__asm__("pusha");
unhandled++;
- // todo also the other pic!
+ // todo also the other pic!// TODO
__asm__("mov $0x20, %al");
__asm__("out %al, $0x20");
@@ -61,7 +62,7 @@ void int_kb_handler()
__asm__("in $0x60, %al");
__asm__("mov %%al, %0"::"m" (kb_in));
- int0(kb_in);
+ int0(kb_in); //TODO!!
__asm__("mov $0x20, %al");
__asm__("out %al, $0x20");
@@ -76,17 +77,10 @@ void int_init(uint16_t sel)
{
int i;
- /*
- idtd.size=sizeof(struct int_desc)*INT_MAX-1; // why the -1 ??
- idtd.base=(uint32_t)&idt[0];
- */
-
for(i=0; i<INT_MAX; i++)
{
-// if(i==0)int_install_ir(i, 0, 0,0);
if(i==33)int_install_ir(i, 0b10001110, sel,&int_kb_handler);
else int_install_ir(i, 0b10001110, sel,&int_def_handler);
- //if(i==0)int_install_ir(i, 0, 0,0);
}
}
@@ -116,44 +110,15 @@ void int_install()
__asm__("lidt %0"::"m" (idtd));
}
-
-void int_disable()
+/*
+void int_show()
{
- __asm__("cli");
-}
-
-void int_enable()
-{
- __asm__("sti");
-}
-
-void kernel_main()
-{
-
- console_clear_screen();
-
- //
- print_string(KERNEL_HELLO_MESSAGE);
- print_nextline();
- print_nextline();
- //
-
- // address of our initial idt (set up by bootloader)
- //uint16_t *ptr3=0x1000;
uint16_t *ptr3=&idt[0];
- //uint16_t *ptr3=0x2040;
-
- // debugging idt:
- // int_install_ir(34,0x0,0xaabb,0x1234);
- //int_install_ir(33,0b1000110,0x8,&int_def_handler);
-
print_string("idt located: ");
print_hex(ptr3);
print_nextline();
- // init idt;
- int_init(0x08);
// first two bytes as chars
int offset;
@@ -167,64 +132,61 @@ void kernel_main()
print_hex(*(ptr3+3+offset*4)); //addrHi
print_nextline();
}
+}
+*/
+void int_disable()
+{
+ __asm__("cli");
+}
- //
- // print_nextline();
- // print_nextline();
-
-// print_hex(*ptr2);
-
- // print_nextline();
- // print_nextline();
-
- // int_init(0x08); // offset in GDT (CODE_SEG)
- // int_install_ir(33,0b1000110,0x8,0x087c);
+void int_enable()
+{
+ __asm__("sti");
+}
+////////// KERNEL MAIN///// /////
+//
+void kernel_main()
+{
- //int_install_ir(33, 0b10001110, 0x8, 0x7c50);
+ // clear console
+ scr_clear();
+ // hello message
+ scr_put_string(KERNEL_HELLO_MESSAGE);
+ scr_nextline();
+ scr_nextline();
+
+ // init interrupt decriptor table
+ // install and enable!
+ int_init(0x08);
int_install();
int_enable();
+ scr_put_string("Interrupts Up and Running");
+ scr_nextline();
- //print_str(0,0,"Interrupts Enabled");
- //
- /*
- int irq=32;
- for (irq=32;irq<32+16;irq++)
- {
- print_string("irq:");
- print_hex(irq);
-
- print_string(" -> ");
- print_hex(idt_old[irq].addrLo);
- print_string(" ");
- print_hex(idt_old[irq].addrHi);
- print_string(" ");
- print_hex(idt_old[irq].sel);
- print_nextline();
- }
-*/
-
+ // kernel main loop
while(1)
{
-
// print_nextline();
// print_str_col(0,0,"ABC",col);
-// print_str_col(1,SCR_HEIGHT,"(*)",col2++);
+ print_str_col(1,SCR_HEIGHT,"(*)",col2++);
//int0();
}
- print_hex(*(ptr3));
- print_nextline();
}
+
+
+/// keyboard driver ////
+
void int0(uint8_t in)
{
int i=0;
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-09 07:23:42 +0000