CTAOS v1

include/system.h

@@ -0,0 +1,104 @@
+#ifndef __SYSTEM_H
+#define __SYSTEM_H
+
+// Data type declarations
+typedef unsigned char byte;
+typedef unsigned short word;
+typedef unsigned int dword;
+
+/* This defines what the stack looks like after an ISR was running */
+typedef struct
+{
+    unsigned int gs, fs, es, ds;      /* pushed the segs last */
+    unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;  /* pushed by 'pusha' */
+    unsigned int int_no, err_code;    /* our 'push byte #' and ecodes do this */
+    unsigned int eip, cs, eflags, useresp, ss;   /* pushed by the processor automatically */ 
+} regs;
+
+
+byte *TextVideoRam;
+int cursor_x, cursor_y;
+int current_mode_width;
+int current_mode_height;
+
+// System functions declaration
+void system_init();
+void *memcpy(void *dest, const void *src, int count);
+void *memset(void *dest, char val, int count);
+unsigned short *memsetw(unsigned short *dest, unsigned short val, int count);
+int strlen (const char *str);
+byte inportb (word _port);
+byte inb (word _port);
+void outportb (word _port, byte _data);
+void outb (word _port, byte _data) ;
+
+// GDT, IDT, ISRs, IRQ functions declarations
+void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
+void gdt_install();
+
+void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
+void idt_install();
+
+void isrs_install();
+
+void irq_install_handler(int irq, void (*handler)(regs *r));
+void irq_uninstall_handler(int irq);
+void irq_install();
+
+
+// Initialize system
+
+
+void *memcpy(void *dest, const void *src, int count)
+{
+    const char *sp = (const char *)src;
+    char *dp = (char *)dest;
+    for(; count != 0; count--) *dp++ = *sp++;
+    return dest;
+}
+
+void *memset(void *dest, char val, int count)
+{
+    char *temp = (char *)dest;
+    for( ; count != 0; count--) *temp++ = val;
+    return dest;
+}
+
+unsigned short *memsetw(unsigned short *dest, unsigned short val, int count)
+{
+    unsigned short *temp = (unsigned short *)dest;
+    for( ; count != 0; count--) *temp++ = val;
+    return dest;
+}
+
+
+// strlen -- Get lenght of str
+int strlen (const char *str)
+{
+      int i;
+      for (i = 0; str[i]!=0; i++) {}
+      return i;
+}
+
+
+byte inportb (word _port) {
+      byte rv;
+      __asm__ __volatile__ ("inb %1, %0" : "=a" (rv) : "dN" (_port));
+      return rv;
+}
+byte inb (word _port) {
+      byte rv;
+      __asm__ __volatile__ ("inb %1, %0" : "=a" (rv) : "dN" (_port));
+      return rv;
+}
+
+
+void outportb (word _port, byte _data) {
+      __asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
+}
+void outb (word _port, byte _data) {
+      __asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
+}
+
+
+#endif