295 lines
6.7 KiB
C
295 lines
6.7 KiB
C
#include "type.h"
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#include "const.h"
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#include "protect.h"
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#include "string.h"
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#include "proc.h"
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#include "tty.h"
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#include "console.h"
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#include "global.h"
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#include "proto.h"
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#include "keyboard.h"
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#include "x86.h"
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int current_console; //当前显示在屏幕上的console
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void tty_write(TTY *tty, char *buf, int len);
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int tty_read(TTY *tty, char *buf, int len);
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static void init_tty(TTY *tty);
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static void tty_mouse(TTY *tty);
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static void tty_dev_read(TTY *tty);
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static void tty_dev_write(TTY *tty);
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static void put_key(TTY *tty, u32 key);
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void in_process(TTY *p_tty, u32 key)
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{
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int real_line = p_tty->console->orig / SCR_WIDTH;
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if (!(key & FLAG_EXT))
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{
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put_key(p_tty, key);
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}
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else
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{
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int raw_code = key & MASK_RAW;
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switch (raw_code)
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{
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case ENTER:
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put_key(p_tty, '\n');
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p_tty->status = p_tty->status & 3; //&3'b011
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break;
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case BACKSPACE:
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put_key(p_tty, '\b');
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break;
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case UP:
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if (p_tty->console->current_line < 43)
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{
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disable_int();
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p_tty->console->current_line++;
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outb(CRTC_ADDR_REG, START_ADDR_H);
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outb(CRTC_DATA_REG, ((80 * (p_tty->console->current_line + real_line)) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, START_ADDR_L);
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outb(CRTC_DATA_REG, (80 * (p_tty->console->current_line + real_line)) & 0xFF);
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enable_int();
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}
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break;
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case DOWN:
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if (p_tty->console->current_line > 0)
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{
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disable_int();
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p_tty->console->current_line--;
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outb(CRTC_ADDR_REG, START_ADDR_H);
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outb(CRTC_DATA_REG, ((80 * (p_tty->console->current_line + real_line)) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, START_ADDR_L);
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outb(CRTC_DATA_REG, (80 * (p_tty->console->current_line + real_line)) & 0xFF);
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enable_int();
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}
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break;
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case F1:
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case F2:
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case F3:
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case F4:
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case F5:
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case F6:
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case F7:
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case F8:
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case F9:
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case F10:
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case F11:
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case F12:
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select_console(raw_code - F1);
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break;
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}
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}
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}
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#define TTY_FIRST (tty_table)
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#define TTY_END (tty_table + NR_CONSOLES)
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void task_tty()
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{
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TTY *p_tty;
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for (p_tty = TTY_FIRST; p_tty < TTY_END; p_tty++)
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{
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init_tty(p_tty);
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}
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p_tty = tty_table;
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select_console(0);
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//设置第一个tty光标位置，第一个tty需要特殊处理
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disable_int();
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outb(CRTC_ADDR_REG, CURSOR_H);
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outb(CRTC_DATA_REG, ((vga_get_disppos()) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, CURSOR_L);
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outb(CRTC_DATA_REG, (vga_get_disppos()) & 0xFF);
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enable_int();
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//轮询
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while (1)
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{
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for (p_tty = TTY_FIRST; p_tty < TTY_END; p_tty++)
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{
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do
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{
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tty_mouse(p_tty); /* tty判断鼠标操作 */
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tty_dev_read(p_tty); /* 从键盘输入缓冲区读到这个tty自己的缓冲区 */
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tty_dev_write(p_tty); /* 把tty缓存区的数据写到这个tty占有的显存 */
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} while (p_tty->ibuf_cnt);
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}
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}
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}
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static void init_tty(TTY *p_tty)
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{
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p_tty->ibuf_read_cnt = p_tty->ibuf_cnt = 0;
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p_tty->status = TTY_STATE_DISPLAY;
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p_tty->ibuf_read = p_tty->ibuf_head = p_tty->ibuf_tail = p_tty->ibuf;
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int det = p_tty - tty_table;
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p_tty->console = console_table + det;
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p_tty->mouse_left_button = 0;
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p_tty->mouse_mid_button = 0;
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p_tty->mouse_X = 0;
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p_tty->mouse_Y = 0;
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init_screen(p_tty);
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}
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static void tty_mouse(TTY *tty)
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{
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if (is_current_console(tty->console))
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{
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int real_line = tty->console->orig / SCR_WIDTH;
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if (tty->mouse_left_button)
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{
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if (tty->mouse_Y > MOUSE_UPDOWN_BOUND)
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{ //按住鼠标左键向上滚动
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if (tty->console->current_line < 43)
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{
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disable_int();
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tty->console->current_line++;
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outb(CRTC_ADDR_REG, START_ADDR_H);
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outb(CRTC_DATA_REG, ((80 * (tty->console->current_line + real_line)) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, START_ADDR_L);
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outb(CRTC_DATA_REG, (80 * (tty->console->current_line + real_line)) & 0xFF);
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enable_int();
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tty->mouse_Y = 0;
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}
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}
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else if (tty->mouse_Y < -MOUSE_UPDOWN_BOUND)
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{ //按住鼠标左键向下滚动
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if (tty->console->current_line > 0)
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{
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disable_int();
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tty->console->current_line--;
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outb(CRTC_ADDR_REG, START_ADDR_H);
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outb(CRTC_DATA_REG, ((80 * (tty->console->current_line + real_line)) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, START_ADDR_L);
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outb(CRTC_DATA_REG, (80 * (tty->console->current_line + real_line)) & 0xFF);
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enable_int();
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tty->mouse_Y = 0;
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}
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}
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}
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if (tty->mouse_mid_button)
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{ //点击中键复原
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disable_int();
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tty->console->current_line = 0;
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outb(CRTC_ADDR_REG, START_ADDR_H);
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outb(CRTC_DATA_REG, ((80 * (tty->console->current_line + real_line)) >> 8) & 0xFF);
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outb(CRTC_ADDR_REG, START_ADDR_L);
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outb(CRTC_DATA_REG, (80 * (tty->console->current_line + real_line)) & 0xFF);
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enable_int();
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tty->mouse_Y = 0;
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}
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}
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}
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static void tty_dev_read(TTY *tty)
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{
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if (is_current_console(tty->console))
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{
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keyboard_read(tty);
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}
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}
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static void tty_dev_write(TTY *tty)
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{
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if (tty->ibuf_cnt)
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{
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char ch = *(tty->ibuf_tail);
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tty->ibuf_tail++;
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if (tty->ibuf_tail == tty->ibuf + TTY_IN_BYTES)
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{
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tty->ibuf_tail = tty->ibuf;
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}
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tty->ibuf_cnt--;
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if (ch == '\b')
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{
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if (tty->ibuf_read_cnt == 1)
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{
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tty->ibuf_read_cnt--;
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tty->ibuf_head--;
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tty->ibuf_tail--;
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return;
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}
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else
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{
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tty->ibuf_read_cnt -= 2;
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if (tty->ibuf_head == tty->ibuf)
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{
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tty->ibuf_head = tty->ibuf_tail = &tty->ibuf[256 - 2];
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}
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else
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{
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tty->ibuf_head--;
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tty->ibuf_tail--;
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tty->ibuf_head--;
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tty->ibuf_tail--;
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}
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}
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}
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out_char(tty->console, ch);
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}
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}
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static void put_key(TTY *tty, u32 key)
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{
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if (tty->ibuf_cnt < TTY_IN_BYTES)
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{
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*(tty->ibuf_head) = key;
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tty->ibuf_head++;
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if (tty->ibuf_head == tty->ibuf + TTY_IN_BYTES)
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tty->ibuf_head = tty->ibuf;
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tty->ibuf_cnt++;
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tty->ibuf_read_cnt++;
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}
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}
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/*****************************************************************************
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* tty_write
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****************************************************************************
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* 当fd=STD_OUT时，write()系统调用转发到此函数
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*****************************************************************************/
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void tty_write(TTY *tty, char *buf, int len)
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{
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while (--len >= 0)
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out_char(tty->console, *buf++);
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}
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/*****************************************************************************
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* tty_read
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****************************************************************************
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* 当fd=STD_IN时，read()系统调用转发到此函数
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*****************************************************************************/
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int tty_read(TTY *tty, char *buf, int len)
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{
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int i = 0;
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if (!tty->ibuf_read_cnt)
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{
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tty->status |= TTY_STATE_WAIT_ENTER;
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}
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while ((tty->status & TTY_STATE_WAIT_ENTER))
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;
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while (tty->ibuf_read_cnt && i < len)
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{
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buf[i] = *tty->ibuf_read;
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tty->ibuf_read++;
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if (tty->ibuf_read == tty->ibuf + TTY_IN_BYTES)
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{
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tty->ibuf_read = tty->ibuf;
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}
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tty->ibuf_read_cnt--;
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i++;
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}
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return i;
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} |