kernel/include/system.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #ifndef __SYSTEM_H
  21 #define __SYSTEM_H
  22
  23 #include "fdc.h"
  24 #include "mytypes.h"
  25 #include "dev.h"
  26 #include "user.h"
  27 #include "tty.h"
  28 #include "partition.h"
  29 #include "../drivers/char/video/video.h"
  30
  31 /* irq0 timer */
  32 #define HZ              1000
  33
  34 /* kernel attributes */
  35 unsigned kernel_attr;
  36
  37 #define KERNEL_LIVE     0x01
  38 #define KERNEL_SECURE   0x02
  39 #define KERNEL_NOHDD    0x04
  40 #define KERNEL_NOATA    0x08
  41 #define KERNEL_NOFLOPPY 0x10
  42 #define KERNEL_NOCDROM  0x20
  43
  44
  45 #define CONSOLE_LOG     30
  46
  47 tty_t *currtty;
  48
  49 /* keys */
  50 char key;
  51 unsigned key_state;
  52
  53 unsigned debug;         // developer mode
  54
  55 unsigned long long ctps;        // cpu ticks per second
  56
  57 partition_t *curr_part;
  58
  59 /* This defines what the stack looks like after an ISR was running */
  60 struct regs
  61 {
  62         unsigned int ds, es, fs, gs;
  63         unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;
  64         unsigned int int_no, err_code;
  65         unsigned int eip, cs, eflags, useresp, ss;
  66 };
  67
  68 #define _set_gate(gate_addr,type,dpl,addr) \
  69 __asm__ ("movw %%dx,%%ax\n\t" \
  70         "movw %0,%%dx\n\t" \
  71         "movl %%eax,%1\n\t" \
  72         "movl %%edx,%2" \
  73         : \
  74         : "i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
  75         "o" (*((char *) (gate_addr))), \
  76         "o" (*(4+(char *) (gate_addr))), \
  77         "d" ((char *) (addr)),"a" (0x00080000))
  78
  79
  80 struct dir{
  81         char name[10];
  82         int read;
  83         int hidden;
  84         int system;
  85         int volume;
  86         int dir;
  87         int bin;
  88         unsigned int start;
  89 } dir[223];
  90
  91 unsigned char *file_cache;
  92
  93 /** externs **/
  94
  95 /* init.c */
  96 extern int init ();
  97
  98 /* memory.c */
  99 extern void *malloc (unsigned size);
 100 extern void *realloc(void *blk, unsigned size);
 101 extern void free (void *blk);
 102
 103 extern unsigned int init_mm ();
 104
 105 /* console.c */
 106 extern unsigned int init_console ();
 107
 108 /* elf.c */
 109 extern int exec_elf (unsigned char *image, unsigned *entry);
 110 extern int flush_elf ();
 111
 112 /* exec.c */
 113 extern bool exec (unsigned char *fi);
 114
 115 /* gtd.c */
 116 extern void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
 117 extern unsigned int gdt_install();
 118
 119 /* idt.c */
 120 extern void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
 121 extern unsigned int idt_install();
 122
 123 /* isrs.c */
 124 extern unsigned int isrs_install();
 125
 126 /* irq.c */
 127 extern void irq_install_handler (int irq, void (*handler)(struct regs *r));
 128 extern void irq_uninstall_handler (int irq);
 129 extern unsigned int irq_install ();
 130
 131 /* timer.c */
 132 extern void timer_wait (int ticks);
 133 extern unsigned int timer_install ();
 134
 135 /* keyboard.c */
 136 extern unsigned int keyboard_install ();
 137
 138 extern unsigned int init_tasks (void);
 139 extern void schedule (void);
 140 extern unsigned int floppy_install (void);
 141 extern void fda_print (int i);
 142 extern void console (int i);
 143 extern void uptime (void);
 144
 145 /* fat.c */
 146 extern void read_dir (int aa);
 147 extern unsigned long read_file (int aa);
 148
 149 /* ls.c */
 150 extern int ls (unsigned char* fi);
 151
 152 /* cd.c */
 153 extern int cd (unsigned char* fi);
 154
 155 /* cat.c */
 156 extern int cat (partition_t *p, unsigned char *fi);
 157
 158 #endif