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 "file.h"
  30 #include "time.h"
  31 #include "_size_t.h"
  32 #include "../drivers/char/video/video.h"
  33
  34 /* irq0 timer */
  35 #define HZ              1000
  36
  37 /* kernel attributes */
  38 unsigned kernel_attr;
  39
  40 #define KERNEL_LIVE     0x01
  41 #define KERNEL_18HZ     0x02
  42 #define KERNEL_NOHDD    0x04
  43 #define KERNEL_NOATA    0x08
  44 #define KERNEL_NOFLOPPY 0x10
  45 #define KERNEL_NOCDROM  0x20
  46
  47
  48 #define CONSOLE_LOG     16
  49
  50 unsigned debug;         // developer mode
  51
  52 unsigned long long ctps;        // cpu ticks per second
  53
  54 tty_t *currtty;
  55
  56 partition_t *curr_part;
  57
  58 unsigned int fd_count;
  59
  60 tm *realtime;
  61
  62 #define KBD_MAX_QUAUE 16
  63 typedef struct
  64 {
  65         char key[KBD_MAX_QUAUE];
  66         int p;
  67         unsigned state[KBD_MAX_QUAUE];
  68 } kbd_quaue;
  69
  70 /* memory vars */
  71 unsigned short mem_ext;
  72
  73 /* This defines what the stack looks like after an ISR was running */
  74 struct regs
  75 {
  76         unsigned int ds, es, fs, gs;
  77         unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;
  78         unsigned int int_no, err_code;
  79         unsigned int eip, cs, eflags, useresp, ss;
  80 };
  81
  82 /* registers pushed on the stack by exceptions or interrupts that
  83 switch from user privilege to kernel privilege
  84         *** WARNING ***
  85 The layout of this struct must agree with the order in which
  86 registers are pushed and popped in the assembly-language
  87 interrupt handler code. */
  88 typedef struct
  89 {
  90         unsigned edi, esi, ebp, esp, ebx, edx, ecx, eax; /* PUSHA/POP */
  91         unsigned ds, es, fs, gs;
  92         unsigned which_int, err_code;
  93         unsigned eip, cs, eflags, user_esp, user_ss; /* INT nn/IRET */
  94         unsigned v_es, v_ds, v_fs, v_gs; /* V86 mode only */
  95 } uregs_t;
  96
  97 #define _set_gate(gate_addr, type, dpl, addr) \
  98 __asm__ ("movw %%dx,%%ax\n\t" \
  99         "movw %0,%%dx\n\t" \
 100         "movl %%eax,%1\n\t" \
 101         "movl %%edx,%2" \
 102         : \
 103         : "i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
 104         "o" (*((char *) (gate_addr))), \
 105         "o" (*(4+(char *) (gate_addr))), \
 106         "d" ((char *) (addr)),"a" (0x00080000))
 107
 108
 109 /* fs directory structure */
 110 struct dir {
 111         char name[10];
 112         int read;
 113         int hidden;
 114         int system;
 115         int volume;
 116         int dir;
 117         int bin;
 118         unsigned int start;
 119 } dir[223];
 120
 121 unsigned char *file_cache;
 122
 123 /** externs **/
 124
 125 /* init.c */
 126 extern int init ();
 127
 128 /* memory.c */
 129 extern void *malloc (unsigned size);
 130 extern void *realloc(void *blk, unsigned size);
 131 extern void free (void *blk);
 132
 133 extern unsigned int init_mm ();
 134
 135 /* protmem.c */
 136 extern void *memcpy_to_user (void *dest, const void *src, size_t count);
 137 extern void *memcpy_from_user (void *dest, const void *src, size_t count);
 138 extern unsigned memtest_data (void *src, void *data, size_t offset);
 139
 140 /* console.c */
 141 extern unsigned int init_console ();
 142 extern void console (int i);
 143
 144 /* elf.c */
 145 extern int exec_elf (unsigned char *image, unsigned *entry, unsigned *elf_data, unsigned *elf_data_off, unsigned *elf_bss);
 146 extern int flush_elf ();
 147
 148 /* exec.c */
 149 extern bool exec (unsigned char *fi);
 150
 151 /* gtd.c */
 152 extern void gdt_set_gate (int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
 153 extern unsigned int gdt_install ();
 154
 155 /* idt.c */
 156 extern void idt_set_gate (unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
 157 extern unsigned int idt_install ();
 158
 159 /* isrs.c */
 160 extern unsigned int isrs_install ();
 161
 162 /* irq.c */
 163 extern void irq_install_handler (int irq, void (*handler)(struct regs *r));
 164 extern void irq_uninstall_handler (int irq);
 165 extern unsigned int irq_install ();
 166
 167 /* timer.c */
 168 extern void timer_wait (int ticks);
 169 extern unsigned int timer_install ();
 170
 171 /* keyboard.c */
 172 extern unsigned int keyboard_install ();
 173 extern char getkey ();
 174 extern void setkey (char key);
 175
 176 extern unsigned int init_tasks (void);
 177 extern unsigned sched_lock ();
 178 extern unsigned sched_unlock ();
 179 extern void schedule (void);
 180
 181
 182 extern void uptime (void);
 183
 184 /* fat.c */
 185 extern void read_dir (int aa);
 186 extern unsigned long read_file (int aa);
 187
 188 /* ls.c */
 189 extern int ls (unsigned char* fi);
 190
 191 /* cd.c */
 192 extern int cd (unsigned char* fi);
 193
 194 /* cat.c */
 195 extern int cat (partition_t *p, unsigned char *fi);
 196
 197 extern int read (unsigned fd, void *buf, unsigned len);
 198
 199 /* fopen.c */
 200 extern FILE *fopen (const char *filename, const char *mode);
 201
 202 /* fputs.c */
 203 extern char *fgets (char *string, int n, FILE *file);
 204
 205 /* fclose.c */
 206 extern int fclose (FILE *file);
 207
 208 /* rtc.c */
 209 extern tm *rtc_getcurrtime ();
 210
 211 #endif