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/*
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* linux/kernel/console.c
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*
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* (C) 1991 Linus Torvalds
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*/
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/*
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* console.c
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*
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* This module implements the console io functions
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* 'void con_init(void)'
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* 'void con_write(struct tty_queue * queue)'
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* Hopefully this will be a rather complete VT102 implementation.
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*
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* Beeping thanks to John T Kohl.
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*/
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/*
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* NOTE!!! We sometimes disable and enable interrupts for a short while
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* (to put a word in video IO), but this will work even for keyboard
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* interrupts. We know interrupts aren't enabled when getting a keyboard
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* interrupt, as we use trap-gates. Hopefully all is well.
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*/
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/*
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* Code to check for different video-cards mostly by Galen Hunt,
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* <g-hunt@ee.utah.edu>
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*/
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#include <linux/sched.h>
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#include <linux/tty.h>
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#include <asm/io.h>
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#include <asm/system.h>
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/*
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* These are set up by the setup-routine at boot-time:
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*/
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#define ORIG_X (*(unsigned char *)0x90000)
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#define ORIG_Y (*(unsigned char *)0x90001)
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#define ORIG_VIDEO_PAGE (*(unsigned short *)0x90004)
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#define ORIG_VIDEO_MODE ((*(unsigned short *)0x90006) & 0xff)
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#define ORIG_VIDEO_COLS (((*(unsigned short *)0x90006) & 0xff00) >> 8)
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#define ORIG_VIDEO_LINES (25)
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#define ORIG_VIDEO_EGA_AX (*(unsigned short *)0x90008)
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#define ORIG_VIDEO_EGA_BX (*(unsigned short *)0x9000a)
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#define ORIG_VIDEO_EGA_CX (*(unsigned short *)0x9000c)
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#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
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#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
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#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
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#define VIDEO_TYPE_EGAC 0x21 /* EGA/VGA in Color Mode */
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#define NPAR 16
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extern void keyboard_interrupt(void);
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extern void mouse_interrupt(void);
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static unsigned char video_type; /* Type of display being used */
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static unsigned long video_num_columns; /* Number of text columns */
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static unsigned long video_size_row; /* Bytes per row */
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static unsigned long video_num_lines; /* Number of test lines */
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static unsigned char video_page; /* Initial video page */
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static unsigned long video_mem_start; /* Start of video RAM */
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static unsigned long video_mem_end; /* End of video RAM (sort of) */
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static unsigned short video_port_reg; /* Video register select port */
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static unsigned short video_port_val; /* Video register value port */
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static unsigned short video_erase_char; /* Char+Attrib to erase with */
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static unsigned long origin; /* Used for EGA/VGA fast scroll */
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static unsigned long scr_end; /* Used for EGA/VGA fast scroll */
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static unsigned long pos;
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static unsigned long x,y;
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static unsigned long top,bottom;
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static unsigned long state=0;
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static unsigned long npar,par[NPAR];
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static unsigned long ques=0;
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static unsigned char attr=0x07;
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static void sysbeep(void);
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/*
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* this is what the terminal answers to a ESC-Z or csi0c
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* query (= vt100 response).
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*/
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#define RESPONSE "\033[?1;2c"
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/* NOTE! gotoxy thinks x==video_num_columns is ok */
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static inline void gotoxy(unsigned int new_x,unsigned int new_y)
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{
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if (new_x > video_num_columns || new_y >= video_num_lines)
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return;
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x=new_x;
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y=new_y;
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pos=origin + y*video_size_row + (x<<1);
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}
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static inline void set_origin(void)
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{
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cli();
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outb_p(12, video_port_reg);
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outb_p(0xff&((origin-video_mem_start)>>9), video_port_val);
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outb_p(13, video_port_reg);
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outb_p(0xff&((origin-video_mem_start)>>1), video_port_val);
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sti();
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}
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static void scrup(void)
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{
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if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM)
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{
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if (!top && bottom == video_num_lines) {
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origin += video_size_row;
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pos += video_size_row;
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scr_end += video_size_row;
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if (scr_end > video_mem_end) {
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__asm__("cld\n\t"
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"rep\n\t"
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"movsl\n\t"
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"movl video_num_columns,%1\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" ((video_num_lines-1)*video_num_columns>>1),
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"D" (video_mem_start),
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"S" (origin)
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);
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scr_end -= origin-video_mem_start;
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pos -= origin-video_mem_start;
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origin = video_mem_start;
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} else {
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__asm__("cld\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" (video_num_columns),
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"D" (scr_end-video_size_row)
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);
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}
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set_origin();
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} else {
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__asm__("cld\n\t"
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"rep\n\t"
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"movsl\n\t"
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"movl video_num_columns,%%ecx\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" ((bottom-top-1)*video_num_columns>>1),
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"D" (origin+video_size_row*top),
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"S" (origin+video_size_row*(top+1))
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);
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}
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}
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else /* Not EGA/VGA */
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{
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__asm__("cld\n\t"
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"rep\n\t"
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"movsl\n\t"
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"movl video_num_columns,%%ecx\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" ((bottom-top-1)*video_num_columns>>1),
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"D" (origin+video_size_row*top),
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"S" (origin+video_size_row*(top+1))
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);
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}
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}
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static void scrdown(void)
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{
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if (video_type == VIDEO_TYPE_EGAC || video_type == VIDEO_TYPE_EGAM)
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{
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__asm__("std\n\t"
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"rep\n\t"
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"movsl\n\t"
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"addl $2,%%edi\n\t" /* %edi has been decremented by 4 */
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"movl video_num_columns,%%ecx\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" ((bottom-top-1)*video_num_columns>>1),
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"D" (origin+video_size_row*bottom-4),
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"S" (origin+video_size_row*(bottom-1)-4)
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);
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}
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else /* Not EGA/VGA */
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{
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__asm__("std\n\t"
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"rep\n\t"
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"movsl\n\t"
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"addl $2,%%edi\n\t" /* %edi has been decremented by 4 */
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"movl video_num_columns,%%ecx\n\t"
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"rep\n\t"
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"stosw"
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::"a" (video_erase_char),
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"c" ((bottom-top-1)*video_num_columns>>1),
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"D" (origin+video_size_row*bottom-4),
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"S" (origin+video_size_row*(bottom-1)-4)
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);
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}
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}
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static void lf(void)
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{
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if (y+1<bottom) {
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y++;
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pos += video_size_row;
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return;
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}
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scrup();
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}
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static void ri(void)
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{
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if (y>top) {
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y--;
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pos -= video_size_row;
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return;
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}
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scrdown();
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}
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static void cr(void)
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{
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pos -= x<<1;
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x=0;
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}
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static void del(void)
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{
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if (x) {
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pos -= 2;
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x--;
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*(unsigned short *)pos = video_erase_char;
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}
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}
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static void csi_J(int par)
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{
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long count __asm__("cx");
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long start __asm__("di");
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switch (par) {
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case 0: /* erase from cursor to end of display */
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count = (scr_end-pos)>>1;
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start = pos;
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break;
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case 1: /* erase from start to cursor */
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count = (pos-origin)>>1;
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start = origin;
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break;
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case 2: /* erase whole display */
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count = video_num_columns * video_num_lines;
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|
start = origin;
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|
break;
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default:
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|
|
return;
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|
}
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|
|
__asm__("cld\n\t"
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"rep\n\t"
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"stosw\n\t"
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::"c" (count),
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"D" (start),"a" (video_erase_char)
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|
|
);
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}
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static void csi_K(int par)
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{
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|
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long count __asm__("cx");
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long start __asm__("di");
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switch (par) {
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case 0: /* erase from cursor to end of line */
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if (x>=video_num_columns)
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return;
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count = video_num_columns-x;
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start = pos;
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break;
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case 1: /* erase from start of line to cursor */
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start = pos - (x<<1);
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count = (x<video_num_columns)?x:video_num_columns;
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break;
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case 2: /* erase whole line */
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start = pos - (x<<1);
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count = video_num_columns;
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break;
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default:
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return;
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}
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__asm__("cld\n\t"
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"rep\n\t"
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"stosw\n\t"
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::"c" (count),
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"D" (start),"a" (video_erase_char)
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|
|
);
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}
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void csi_m(void)
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{
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int i;
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for (i=0;i<=npar;i++)
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switch (par[i]) {
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case 0:attr=0x07;break;
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case 1:attr=0x0f;break;
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case 4:attr=0x0f;break;
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case 7:attr=0x70;break;
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case 27:attr=0x07;break;
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}
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}
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static inline void set_cursor(void)
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{
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cli();
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outb_p(14, video_port_reg);
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outb_p(0xff&((pos-video_mem_start)>>9), video_port_val);
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outb_p(15, video_port_reg);
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outb_p(0xff&((pos-video_mem_start)>>1), video_port_val);
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sti();
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}
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static void respond(struct tty_struct * tty)
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{
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char * p = RESPONSE;
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cli();
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while (*p) {
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PUTCH(*p,tty->read_q);
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p++;
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}
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sti();
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copy_to_cooked(tty);
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}
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|
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static void insert_char(void)
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{
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int i=x;
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unsigned short tmp, old = video_erase_char;
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unsigned short * p = (unsigned short *) pos;
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while (i++<video_num_columns) {
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tmp=*p;
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*p=old;
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old=tmp;
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p++;
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}
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|
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}
|
|
|
|
|
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static void insert_line(void)
|
|
|
{
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|
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int oldtop,oldbottom;
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oldtop=top;
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oldbottom=bottom;
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top=y;
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bottom = video_num_lines;
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|
scrdown();
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|
|
top=oldtop;
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|
bottom=oldbottom;
|
|
|
}
|
|
|
|
|
|
static void delete_char(void)
|
|
|
{
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|
|
int i;
|
|
|
unsigned short * p = (unsigned short *) pos;
|
|
|
|
|
|
if (x>=video_num_columns)
|
|
|
return;
|
|
|
i = x;
|
|
|
while (++i < video_num_columns) {
|
|
|
*p = *(p+1);
|
|
|
p++;
|
|
|
}
|
|
|
*p = video_erase_char;
|
|
|
}
|
|
|
|
|
|
static void delete_line(void)
|
|
|
{
|
|
|
int oldtop,oldbottom;
|
|
|
|
|
|
oldtop=top;
|
|
|
oldbottom=bottom;
|
|
|
top=y;
|
|
|
bottom = video_num_lines;
|
|
|
scrup();
|
|
|
top=oldtop;
|
|
|
bottom=oldbottom;
|
|
|
}
|
|
|
|
|
|
static void csi_at(unsigned int nr)
|
|
|
{
|
|
|
if (nr > video_num_columns)
|
|
|
nr = video_num_columns;
|
|
|
else if (!nr)
|
|
|
nr = 1;
|
|
|
while (nr--)
|
|
|
insert_char();
|
|
|
}
|
|
|
|
|
|
static void csi_L(unsigned int nr)
|
|
|
{
|
|
|
if (nr > video_num_lines)
|
|
|
nr = video_num_lines;
|
|
|
else if (!nr)
|
|
|
nr = 1;
|
|
|
while (nr--)
|
|
|
insert_line();
|
|
|
}
|
|
|
|
|
|
static void csi_P(unsigned int nr)
|
|
|
{
|
|
|
if (nr > video_num_columns)
|
|
|
nr = video_num_columns;
|
|
|
else if (!nr)
|
|
|
nr = 1;
|
|
|
while (nr--)
|
|
|
delete_char();
|
|
|
}
|
|
|
|
|
|
static void csi_M(unsigned int nr)
|
|
|
{
|
|
|
if (nr > video_num_lines)
|
|
|
nr = video_num_lines;
|
|
|
else if (!nr)
|
|
|
nr=1;
|
|
|
while (nr--)
|
|
|
delete_line();
|
|
|
}
|
|
|
|
|
|
static int saved_x=0;
|
|
|
static int saved_y=0;
|
|
|
|
|
|
static void save_cur(void)
|
|
|
{
|
|
|
saved_x=x;
|
|
|
saved_y=y;
|
|
|
}
|
|
|
|
|
|
static void restore_cur(void)
|
|
|
{
|
|
|
gotoxy(saved_x, saved_y);
|
|
|
}
|
|
|
|
|
|
void con_write(struct tty_struct * tty)
|
|
|
{
|
|
|
int nr;
|
|
|
char c;
|
|
|
|
|
|
nr = CHARS(tty->write_q);
|
|
|
while (nr--) {
|
|
|
GETCH(tty->write_q,c);
|
|
|
switch(state) {
|
|
|
case 0:
|
|
|
if (c>31 && c<127) {
|
|
|
if (x>=video_num_columns) {
|
|
|
x -= video_num_columns;
|
|
|
pos -= video_size_row;
|
|
|
lf();
|
|
|
}
|
|
|
__asm__("movb attr,%%ah\n\t"
|
|
|
"movw %%ax,%1\n\t"
|
|
|
::"a" (c),"m" (*(short *)pos)
|
|
|
);
|
|
|
pos += 2;
|
|
|
x++;
|
|
|
} else if (c==27)
|
|
|
state=1;
|
|
|
else if (c==10 || c==11 || c==12)
|
|
|
lf();
|
|
|
else if (c==13)
|
|
|
cr();
|
|
|
else if (c==ERASE_CHAR(tty))
|
|
|
del();
|
|
|
else if (c==8) {
|
|
|
if (x) {
|
|
|
x--;
|
|
|
pos -= 2;
|
|
|
}
|
|
|
} else if (c==9) {
|
|
|
c=8-(x&7);
|
|
|
x += c;
|
|
|
pos += c<<1;
|
|
|
if (x>video_num_columns) {
|
|
|
x -= video_num_columns;
|
|
|
pos -= video_size_row;
|
|
|
lf();
|
|
|
}
|
|
|
c=9;
|
|
|
} else if (c==7)
|
|
|
sysbeep();
|
|
|
break;
|
|
|
case 1:
|
|
|
state=0;
|
|
|
if (c=='[')
|
|
|
state=2;
|
|
|
else if (c=='E')
|
|
|
gotoxy(0,y+1);
|
|
|
else if (c=='M')
|
|
|
ri();
|
|
|
else if (c=='D')
|
|
|
lf();
|
|
|
else if (c=='Z')
|
|
|
respond(tty);
|
|
|
else if (x=='7')
|
|
|
save_cur();
|
|
|
else if (x=='8')
|
|
|
restore_cur();
|
|
|
break;
|
|
|
case 2:
|
|
|
for(npar=0;npar<NPAR;npar++)
|
|
|
par[npar]=0;
|
|
|
npar=0;
|
|
|
state=3;
|
|
|
if (ques=(c=='?'))
|
|
|
break;
|
|
|
case 3:
|
|
|
if (c==';' && npar<NPAR-1) {
|
|
|
npar++;
|
|
|
break;
|
|
|
} else if (c>='0' && c<='9') {
|
|
|
par[npar]=10*par[npar]+c-'0';
|
|
|
break;
|
|
|
} else state=4;
|
|
|
case 4:
|
|
|
state=0;
|
|
|
switch(c) {
|
|
|
case 'G': case '`':
|
|
|
if (par[0]) par[0]--;
|
|
|
gotoxy(par[0],y);
|
|
|
break;
|
|
|
case 'A':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(x,y-par[0]);
|
|
|
break;
|
|
|
case 'B': case 'e':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(x,y+par[0]);
|
|
|
break;
|
|
|
case 'C': case 'a':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(x+par[0],y);
|
|
|
break;
|
|
|
case 'D':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(x-par[0],y);
|
|
|
break;
|
|
|
case 'E':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(0,y+par[0]);
|
|
|
break;
|
|
|
case 'F':
|
|
|
if (!par[0]) par[0]++;
|
|
|
gotoxy(0,y-par[0]);
|
|
|
break;
|
|
|
case 'd':
|
|
|
if (par[0]) par[0]--;
|
|
|
gotoxy(x,par[0]);
|
|
|
break;
|
|
|
case 'H': case 'f':
|
|
|
if (par[0]) par[0]--;
|
|
|
if (par[1]) par[1]--;
|
|
|
gotoxy(par[1],par[0]);
|
|
|
break;
|
|
|
case 'J':
|
|
|
csi_J(par[0]);
|
|
|
break;
|
|
|
case 'K':
|
|
|
csi_K(par[0]);
|
|
|
break;
|
|
|
case 'L':
|
|
|
csi_L(par[0]);
|
|
|
break;
|
|
|
case 'M':
|
|
|
csi_M(par[0]);
|
|
|
break;
|
|
|
case 'P':
|
|
|
csi_P(par[0]);
|
|
|
break;
|
|
|
case '@':
|
|
|
csi_at(par[0]);
|
|
|
break;
|
|
|
case 'm':
|
|
|
csi_m();
|
|
|
break;
|
|
|
case 'r':
|
|
|
if (par[0]) par[0]--;
|
|
|
if (!par[1]) par[1] = video_num_lines;
|
|
|
if (par[0] < par[1] &&
|
|
|
par[1] <= video_num_lines) {
|
|
|
top=par[0];
|
|
|
bottom=par[1];
|
|
|
}
|
|
|
break;
|
|
|
case 's':
|
|
|
save_cur();
|
|
|
break;
|
|
|
case 'u':
|
|
|
restore_cur();
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
set_cursor();
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
* void con_init(void);
|
|
|
*
|
|
|
* This routine initalizes console interrupts, and does nothing
|
|
|
* else. If you want the screen to clear, call tty_write with
|
|
|
* the appropriate escape-sequece.
|
|
|
*
|
|
|
* Reads the information preserved by setup.s to determine the current display
|
|
|
* type and sets everything accordingly.
|
|
|
*/
|
|
|
void con_init(void)
|
|
|
{
|
|
|
register unsigned char a;
|
|
|
char *display_desc = "????";
|
|
|
char *display_ptr;
|
|
|
|
|
|
video_num_columns = ORIG_VIDEO_COLS;
|
|
|
video_size_row = video_num_columns * 2;
|
|
|
video_num_lines = ORIG_VIDEO_LINES;
|
|
|
video_page = ORIG_VIDEO_PAGE;
|
|
|
video_erase_char = 0x0720;
|
|
|
|
|
|
if (ORIG_VIDEO_MODE == 7) /* Is this a monochrome display? */
|
|
|
{
|
|
|
video_mem_start = 0xb0000;
|
|
|
video_port_reg = 0x3b4;
|
|
|
video_port_val = 0x3b5;
|
|
|
if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
|
|
|
{
|
|
|
video_type = VIDEO_TYPE_EGAM;
|
|
|
video_mem_end = 0xb8000;
|
|
|
display_desc = "EGAm";
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
video_type = VIDEO_TYPE_MDA;
|
|
|
video_mem_end = 0xb2000;
|
|
|
display_desc = "*MDA";
|
|
|
}
|
|
|
}
|
|
|
else /* If not, it is color. */
|
|
|
{
|
|
|
video_mem_start = 0xb8000;
|
|
|
video_port_reg = 0x3d4;
|
|
|
video_port_val = 0x3d5;
|
|
|
if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
|
|
|
{
|
|
|
video_type = VIDEO_TYPE_EGAC;
|
|
|
video_mem_end = 0xbc000;
|
|
|
display_desc = "EGAc";
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
video_type = VIDEO_TYPE_CGA;
|
|
|
video_mem_end = 0xba000;
|
|
|
display_desc = "*CGA";
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/* Let the user known what kind of display driver we are using */
|
|
|
|
|
|
display_ptr = ((char *)video_mem_start) + video_size_row - 8;
|
|
|
while (*display_desc)
|
|
|
{
|
|
|
*display_ptr++ = *display_desc++;
|
|
|
display_ptr++;
|
|
|
}
|
|
|
|
|
|
/* Initialize the variables used for scrolling (mostly EGA/VGA) */
|
|
|
|
|
|
origin = video_mem_start;
|
|
|
scr_end = video_mem_start + video_num_lines * video_size_row;
|
|
|
top = 0;
|
|
|
bottom = video_num_lines;
|
|
|
|
|
|
gotoxy(ORIG_X,ORIG_Y);
|
|
|
set_trap_gate(0x21,&keyboard_interrupt);
|
|
|
outb_p(inb_p(0x21)&0xfd,0x21);
|
|
|
a=inb_p(0x61);
|
|
|
outb_p(a|0x80,0x61);
|
|
|
outb(a,0x61);
|
|
|
|
|
|
//设置键盘控制盘i8042的核心代码
|
|
|
outb_p(0xA8,0x64); //允许鼠标操作
|
|
|
outb_p(0xD4,0x64);
|
|
|
//给0x64端口发送0xD4,表示接下来给0x60的命令是给鼠标的
|
|
|
outb_p(0xF4,0x60); //设置鼠标，允许鼠标向主机自动发送数据包
|
|
|
outb_p(0x60,0x64);
|
|
|
//给0x64端口发送0x60，表示接下来给0x60的命令是给i8042的
|
|
|
outb_p(0x47,0x60); //设置i8042寄存器，运行鼠标接口及其中断
|
|
|
//在鼠标初始化并设置了鼠标中断的响应函数后，打开相应的中断请求位屏蔽
|
|
|
set_trap_gate(0x2c,&mouse_interupt);
|
|
|
//向8259A发送OCW来打开屏蔽
|
|
|
outb_p(inb_p(0x21)&0xFB,0x21);
|
|
|
outb_p(inb_p(0xA1)&0xEF,0xA1);
|
|
|
}
|
|
|
/* from bsd-net-2: */
|
|
|
|
|
|
void sysbeepstop(void)
|
|
|
{
|
|
|
/* disable counter 2 */
|
|
|
outb(inb_p(0x61)&0xFC, 0x61);
|
|
|
}
|
|
|
|
|
|
int beepcount = 0;
|
|
|
|
|
|
static void sysbeep(void)
|
|
|
{
|
|
|
/* enable counter 2 */
|
|
|
outb_p(inb_p(0x61)|3, 0x61);
|
|
|
/* set command for counter 2, 2 byte write */
|
|
|
outb_p(0xB6, 0x43);
|
|
|
/* send 0x637 for 750 HZ */
|
|
|
outb_p(0x37, 0x42);
|
|
|
outb(0x06, 0x42);
|
|
|
/* 1/8 second */
|
|
|
beepcount = HZ/8;
|
|
|
}
|
