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- /*
- * linux/kernel/console.c
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
-
- /*
- * console.c
- *
- * This module exports the console io functions:
- *
- * 'long con_init(long)'
- * 'int con_open(struct tty_struct *tty, struct file * filp)'
- * 'void update_screen(int new_console)'
- * 'void blank_screen(void)'
- * 'void unblank_screen(void)'
- *
- * 'int con_get_font(char *)'
- * 'int con_set_font(char *)'
- * 'int con_get_trans(char *)'
- * 'int con_set_trans(char *)'
- *
- * Hopefully this will be a rather complete VT102 implementation.
- *
- * Beeping thanks to John T Kohl.
- *
- * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
- * Chars, and VT100 enhancements by Peter MacDonald.
- *
- * Copy and paste function by Andrew Haylett.
- *
- * User definable mapping table and font loading by Eugene G. Crosser,
- * <crosser@pccross.msk.su>
- *
- * Code to check for different video-cards mostly by Galen Hunt,
- * <g-hunt@ee.utah.edu>
- *
- */
-
- #define CAN_LOAD_EGA_FONTS /* undefine if the user must not do this */
-
- /*
- * NOTE!!! We sometimes disable and enable interrupts for a short while
- * (to put a word in video IO), but this will work even for keyboard
- * interrupts. We know interrupts aren't enabled when getting a keyboard
- * interrupt, as we use trap-gates. Hopefully all is well.
- */
-
- #include <linux/sched.h>
- #include <linux/timer.h>
- #include <linux/tty.h>
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/kd.h>
-
- #include <asm/io.h>
- #include <asm/system.h>
- #include <asm/segment.h>
-
- #include "kbd_kern.h"
- #include "vt_kern.h"
-
- #ifdef CONFIG_SELECTION
- #include <linux/ctype.h>
-
- /* Routines for selection control. */
- int set_selection(const int arg);
- int paste_selection(struct tty_struct *tty);
- static void clear_selection(void);
-
- /* Variables for selection control. */
- #define SEL_BUFFER_SIZE TTY_BUF_SIZE
- static int sel_cons;
- static int sel_start = -1;
- static int sel_end;
- static char sel_buffer[SEL_BUFFER_SIZE] = { '\0' };
- #endif /* CONFIG_SELECTION */
-
- #define NPAR 16
-
- extern void vt_init(void);
- extern void register_console(void (*proc)(const char *));
- extern void compute_shiftstate(void);
-
- unsigned long video_num_columns; /* Number of text columns */
- unsigned long video_num_lines; /* Number of text lines */
-
- static unsigned char video_type; /* Type of display being used */
- static unsigned long video_mem_base; /* Base of video memory */
- static unsigned long video_mem_term; /* End of video memory */
- static unsigned long video_size_row; /* Bytes per row */
- static unsigned char video_page; /* Initial video page */
- static unsigned short video_port_reg; /* Video register select port */
- static unsigned short video_port_val; /* Video register value port */
- static int can_do_color = 0;
- static int printable = 0;
-
- static struct {
- unsigned short vc_video_erase_char; /* Background erase character */
- unsigned char vc_attr; /* Current attributes */
- unsigned char vc_def_color; /* Default colors */
- unsigned char vc_color; /* Foreground & background */
- unsigned char vc_s_color; /* Saved foreground & background */
- unsigned char vc_ulcolor; /* Colour for underline mode */
- unsigned char vc_halfcolor; /* Colour for half intensity mode */
- unsigned long vc_origin; /* Used for EGA/VGA fast scroll */
- unsigned long vc_scr_end; /* Used for EGA/VGA fast scroll */
- unsigned long vc_pos;
- unsigned long vc_x,vc_y;
- unsigned long vc_top,vc_bottom;
- unsigned long vc_state;
- unsigned long vc_npar,vc_par[NPAR];
- unsigned long vc_video_mem_start; /* Start of video RAM */
- unsigned long vc_video_mem_end; /* End of video RAM (sort of) */
- unsigned long vc_saved_x;
- unsigned long vc_saved_y;
- /* mode flags */
- unsigned long vc_charset : 1; /* Character set G0 / G1 */
- unsigned long vc_s_charset : 1; /* Saved character set */
- unsigned long vc_decscnm : 1; /* Screen Mode */
- unsigned long vc_decom : 1; /* Origin Mode */
- unsigned long vc_decawm : 1; /* Autowrap Mode */
- unsigned long vc_deccm : 1; /* Cursor Visible */
- unsigned long vc_decim : 1; /* Insert Mode */
- /* attribute flags */
- unsigned long vc_intensity : 2; /* 0=half-bright, 1=normal, 2=bold */
- unsigned long vc_underline : 1;
- unsigned long vc_blink : 1;
- unsigned long vc_reverse : 1;
- unsigned long vc_s_intensity : 2; /* saved rendition */
- unsigned long vc_s_underline : 1;
- unsigned long vc_s_blink : 1;
- unsigned long vc_s_reverse : 1;
- /* misc */
- unsigned long vc_ques : 1;
- unsigned long vc_need_wrap : 1;
- unsigned long vc_tab_stop[5]; /* Tab stops. 160 columns. */
- unsigned char * vc_translate;
- unsigned char * vc_G0_charset;
- unsigned char * vc_G1_charset;
- unsigned char * vc_saved_G0;
- unsigned char * vc_saved_G1;
- /* additional information is in vt_kern.h */
- } vc_cons [NR_CONSOLES];
-
- unsigned short *vc_scrbuf[NR_CONSOLES];
- static unsigned short * vc_scrmembuf;
- static int console_blanked = 0;
-
- #define origin (vc_cons[currcons].vc_origin)
- #define scr_end (vc_cons[currcons].vc_scr_end)
- #define pos (vc_cons[currcons].vc_pos)
- #define top (vc_cons[currcons].vc_top)
- #define bottom (vc_cons[currcons].vc_bottom)
- #define x (vc_cons[currcons].vc_x)
- #define y (vc_cons[currcons].vc_y)
- #define state (vc_cons[currcons].vc_state)
- #define npar (vc_cons[currcons].vc_npar)
- #define par (vc_cons[currcons].vc_par)
- #define ques (vc_cons[currcons].vc_ques)
- #define attr (vc_cons[currcons].vc_attr)
- #define saved_x (vc_cons[currcons].vc_saved_x)
- #define saved_y (vc_cons[currcons].vc_saved_y)
- #define translate (vc_cons[currcons].vc_translate)
- #define G0_charset (vc_cons[currcons].vc_G0_charset)
- #define G1_charset (vc_cons[currcons].vc_G1_charset)
- #define saved_G0 (vc_cons[currcons].vc_saved_G0)
- #define saved_G1 (vc_cons[currcons].vc_saved_G1)
- #define video_mem_start (vc_cons[currcons].vc_video_mem_start)
- #define video_mem_end (vc_cons[currcons].vc_video_mem_end)
- #define video_erase_char (vc_cons[currcons].vc_video_erase_char)
- #define decscnm (vc_cons[currcons].vc_decscnm)
- #define decom (vc_cons[currcons].vc_decom)
- #define decawm (vc_cons[currcons].vc_decawm)
- #define deccm (vc_cons[currcons].vc_deccm)
- #define decim (vc_cons[currcons].vc_decim)
- #define need_wrap (vc_cons[currcons].vc_need_wrap)
- #define color (vc_cons[currcons].vc_color)
- #define s_color (vc_cons[currcons].vc_s_color)
- #define def_color (vc_cons[currcons].vc_def_color)
- #define foreground (color & 0x0f)
- #define background (color & 0xf0)
- #define charset (vc_cons[currcons].vc_charset)
- #define s_charset (vc_cons[currcons].vc_s_charset)
- #define intensity (vc_cons[currcons].vc_intensity)
- #define underline (vc_cons[currcons].vc_underline)
- #define blink (vc_cons[currcons].vc_blink)
- #define reverse (vc_cons[currcons].vc_reverse)
- #define s_intensity (vc_cons[currcons].vc_s_intensity)
- #define s_underline (vc_cons[currcons].vc_s_underline)
- #define s_blink (vc_cons[currcons].vc_s_blink)
- #define s_reverse (vc_cons[currcons].vc_s_reverse)
- #define ulcolor (vc_cons[currcons].vc_ulcolor)
- #define halfcolor (vc_cons[currcons].vc_halfcolor)
- #define tab_stop (vc_cons[currcons].vc_tab_stop)
- #define vcmode (vt_cons[currcons].vc_mode)
- #define vtmode (vt_cons[currcons].vt_mode)
- #define vtpid (vt_cons[currcons].vt_pid)
- #define vtnewvt (vt_cons[currcons].vt_newvt)
-
- #define set_kbd(x) set_vc_kbd_mode(kbd_table+currcons,x)
- #define clr_kbd(x) clr_vc_kbd_mode(kbd_table+currcons,x)
- #define is_kbd(x) vc_kbd_mode(kbd_table+currcons,x)
-
- #define decarm VC_REPEAT
- #define decckm VC_CKMODE
- #define kbdapplic VC_APPLIC
- #define kbdraw VC_RAW
- #define lnm VC_CRLF
-
- int blankinterval = 10*60*HZ;
- static int screen_size = 0;
-
- /*
- * this is what the terminal answers to a ESC-Z or csi0c query.
- */
- #define VT100ID "\033[?1;2c"
- #define VT102ID "\033[?6c"
-
- static unsigned char * translations[] = {
- /* 8-bit Latin-1 mapped to the PC character set: '\0' means non-printable */
- (unsigned char *)
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\0\0\0\0\0\0\0\0\0\0\376\0\0\0\0\0"
- " !\"#$%&'()*+,-./0123456789:;<=>?"
- "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
- "`abcdefghijklmnopqrstuvwxyz{|}~\0"
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\377\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
- "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
- "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
- "\376\245\376\376\376\376\231\376\350\376\376\376\232\376\376\341"
- "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
- "\376\244\225\242\223\376\224\366\355\227\243\226\201\376\376\230",
- /* vt100 graphics */
- (unsigned char *)
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\0\0\0\0\0\0\0\0\0\0\376\0\0\0\0\0"
- " !\"#$%&'()*+,-./0123456789:;<=>?"
- "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^ "
- "\004\261\007\007\007\007\370\361\007\007\331\277\332\300\305\304"
- "\304\304\137\137\303\264\301\302\263\363\362\343\330\234\007\0"
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
- "\377\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
- "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
- "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
- "\376\245\376\376\376\376\231\376\376\376\376\376\232\376\376\341"
- "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
- "\376\244\225\242\223\376\224\366\376\227\243\226\201\376\376\230",
- /* IBM graphics: minimal translations (BS, CR, LF, LL, SO, SI and ESC) */
- (unsigned char *)
- "\000\001\002\003\004\005\006\007\000\011\000\013\000\000\000\000"
- "\020\021\022\023\024\025\026\027\030\031\032\000\034\035\036\037"
- "\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057"
- "\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077"
- "\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117"
- "\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137"
- "\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157"
- "\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177"
- "\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217"
- "\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237"
- "\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257"
- "\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277"
- "\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317"
- "\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337"
- "\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357"
- "\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377",
- /* USER: customizable mappings, initialized as the previous one (IBM) */
- (unsigned char *)
- "\000\001\002\003\004\005\006\007\010\011\000\013\000\000\016\017"
- "\020\021\022\023\024\025\026\027\030\031\032\000\034\035\036\037"
- "\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057"
- "\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077"
- "\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117"
- "\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137"
- "\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157"
- "\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177"
- "\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217"
- "\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237"
- "\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257"
- "\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277"
- "\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317"
- "\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337"
- "\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357"
- "\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377"
- };
-
- #define NORM_TRANS (translations[0])
- #define GRAF_TRANS (translations[1])
- #define NULL_TRANS (translations[2])
- #define USER_TRANS (translations[3])
-
- static unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
- 8,12,10,14, 9,13,11,15 };
-
- /*
- * gotoxy() must verify all boundaries, because the arguments
- * might also be negative. If the given position is out of
- * bounds, the cursor is placed at the nearest margin.
- */
- static void gotoxy(int currcons, int new_x, int new_y)
- {
- int max_y;
-
- if (new_x < 0)
- x = 0;
- else
- if (new_x >= video_num_columns)
- x = video_num_columns - 1;
- else
- x = new_x;
- if (decom) {
- new_y += top;
- max_y = bottom;
- } else
- max_y = video_num_lines;
- if (new_y < 0)
- y = 0;
- else
- if (new_y >= max_y)
- y = max_y - 1;
- else
- y = new_y;
- pos = origin + y*video_size_row + (x<<1);
- need_wrap = 0;
- }
-
- /*
- * *Very* limited hardware scrollback support..
- */
- static unsigned short __real_origin;
- static unsigned short __origin;
-
- static inline void __set_origin(unsigned short offset)
- {
- unsigned long flags;
- #ifdef CONFIG_SELECTION
- clear_selection();
- #endif /* CONFIG_SELECTION */
- save_flags(flags); cli();
- __origin = offset;
- outb_p(12, video_port_reg);
- outb_p(offset >> 8, video_port_val);
- outb_p(13, video_port_reg);
- outb_p(offset, video_port_val);
- restore_flags(flags);
- }
-
- void scrollback(int lines)
- {
- if (!lines)
- lines = video_num_lines/2;
- lines *= video_num_columns;
- lines = __origin - lines;
- if (lines < 0)
- lines = 0;
- __set_origin(lines);
- }
-
- void scrollfront(int lines)
- {
- if (!lines)
- lines = video_num_lines/2;
- lines *= video_num_columns;
- lines = __origin + lines;
- if (lines > __real_origin)
- lines = __real_origin;
- __set_origin(lines);
- }
-
- static void set_origin(int currcons)
- {
- if (video_type != VIDEO_TYPE_EGAC && video_type != VIDEO_TYPE_EGAM)
- return;
- if (currcons != fg_console || console_blanked || vcmode == KD_GRAPHICS)
- return;
- __real_origin = (origin-video_mem_base) >> 1;
- __set_origin(__real_origin);
- }
-
- /*
- * Put the cursor just beyond the end of the display adaptor memory.
- */
- static inline void hide_cursor(void)
- {
- /* This is inefficient, we could just put the cursor at 0xffff,
- but perhaps the delays due to the inefficiency are useful for
- some hardware... */
- outb_p(14, video_port_reg);
- outb_p(0xff&((video_mem_term-video_mem_base)>>9), video_port_val);
- outb_p(15, video_port_reg);
- outb_p(0xff&((video_mem_term-video_mem_base)>>1), video_port_val);
- }
-
- static inline void set_cursor(int currcons)
- {
- unsigned long flags;
-
- if (currcons != fg_console || console_blanked || vcmode == KD_GRAPHICS)
- return;
- if (__real_origin != __origin)
- set_origin(__real_origin);
- save_flags(flags); cli();
- if (deccm) {
- outb_p(14, video_port_reg);
- outb_p(0xff&((pos-video_mem_base)>>9), video_port_val);
- outb_p(15, video_port_reg);
- outb_p(0xff&((pos-video_mem_base)>>1), video_port_val);
- } else
- hide_cursor();
- restore_flags(flags);
- }
-
- static void scrup(int currcons, unsigned int t, unsigned int b)
- {
- int hardscroll = 1;
-
- if (b > video_num_lines || t >= b)
- return;
- if (video_type != VIDEO_TYPE_EGAC && video_type != VIDEO_TYPE_EGAM)
- hardscroll = 0;
- else if (t || b != video_num_lines)
- hardscroll = 0;
- if (hardscroll) {
- origin += video_size_row;
- pos += video_size_row;
- scr_end += video_size_row;
- if (scr_end > video_mem_end) {
- __asm__("cld\n\t"
- "rep\n\t"
- "movsl\n\t"
- "movl _video_num_columns,%1\n\t"
- "rep\n\t"
- "stosw"
- : /* no output */
- :"a" (video_erase_char),
- "c" ((video_num_lines-1)*video_num_columns>>1),
- "D" (video_mem_start),
- "S" (origin)
- :"cx","di","si");
- scr_end -= origin-video_mem_start;
- pos -= origin-video_mem_start;
- origin = video_mem_start;
- } else {
- __asm__("cld\n\t"
- "rep\n\t"
- "stosw"
- : /* no output */
- :"a" (video_erase_char),
- "c" (video_num_columns),
- "D" (scr_end-video_size_row)
- :"cx","di");
- }
- set_origin(currcons);
- } else {
- __asm__("cld\n\t"
- "rep\n\t"
- "movsl\n\t"
- "movl _video_num_columns,%%ecx\n\t"
- "rep\n\t"
- "stosw"
- : /* no output */
- :"a" (video_erase_char),
- "c" ((b-t-1)*video_num_columns>>1),
- "D" (origin+video_size_row*t),
- "S" (origin+video_size_row*(t+1))
- :"cx","di","si");
- }
- }
-
- static void scrdown(int currcons, unsigned int t, unsigned int b)
- {
- if (b > video_num_lines || t >= b)
- return;
- __asm__("std\n\t"
- "rep\n\t"
- "movsl\n\t"
- "addl $2,%%edi\n\t" /* %edi has been decremented by 4 */
- "movl _video_num_columns,%%ecx\n\t"
- "rep\n\t"
- "stosw\n\t"
- "cld"
- : /* no output */
- :"a" (video_erase_char),
- "c" ((b-t-1)*video_num_columns>>1),
- "D" (origin+video_size_row*b-4),
- "S" (origin+video_size_row*(b-1)-4)
- :"ax","cx","di","si");
- }
-
- static void lf(int currcons)
- {
- if (y+1<bottom) {
- y++;
- pos += video_size_row;
- return;
- } else
- scrup(currcons,top,bottom);
- need_wrap = 0;
- }
-
- static void ri(int currcons)
- {
- if (y>top) {
- y--;
- pos -= video_size_row;
- return;
- } else
- scrdown(currcons,top,bottom);
- need_wrap = 0;
- }
-
- static inline void cr(int currcons)
- {
- pos -= x<<1;
- need_wrap = x = 0;
- }
-
- static inline void bs(int currcons)
- {
- if (x) {
- pos -= 2;
- x--;
- need_wrap = 0;
- }
- }
-
- static inline void del(int currcons)
- {
- #if 0
- if (x) {
- if (!need_wrap) { /* this is not the right condition */
- pos -= 2;
- x--;
- }
- *(unsigned short *)pos = video_erase_char;
- need_wrap = 0;
- }
- #endif
- }
-
- static void csi_J(int currcons, int vpar)
- {
- unsigned long count;
- unsigned long start;
-
- switch (vpar) {
- case 0: /* erase from cursor to end of display */
- count = (scr_end-pos)>>1;
- start = pos;
- break;
- case 1: /* erase from start to cursor */
- count = ((pos-origin)>>1)+1;
- start = origin;
- break;
- case 2: /* erase whole display */
- count = video_num_columns * video_num_lines;
- start = origin;
- break;
- default:
- return;
- }
- __asm__("cld\n\t"
- "rep\n\t"
- "stosw\n\t"
- : /* no output */
- :"c" (count),
- "D" (start),"a" (video_erase_char)
- :"cx","di");
- need_wrap = 0;
- }
-
- static void csi_K(int currcons, int vpar)
- {
- long count;
- long start;
-
- switch (vpar) {
- case 0: /* erase from cursor to end of line */
- count = video_num_columns-x;
- start = pos;
- break;
- case 1: /* erase from start of line to cursor */
- start = pos - (x<<1);
- count = x+1;
- break;
- case 2: /* erase whole line */
- start = pos - (x<<1);
- count = video_num_columns;
- break;
- default:
- return;
- }
- __asm__("cld\n\t"
- "rep\n\t"
- "stosw\n\t"
- : /* no output */
- :"c" (count),
- "D" (start),"a" (video_erase_char)
- :"cx","di");
- need_wrap = 0;
- }
-
- /*
- * I hope this works. The monochrome part is untested.
- */
- static void update_attr(int currcons)
- {
- attr = color;
- if (can_do_color) {
- if (underline)
- attr = (attr & 0xf0) | ulcolor;
- else if (intensity == 0)
- attr = (attr & 0xf0) | halfcolor;
- }
- if (reverse ^ decscnm)
- attr = (attr & 0x88) | (((attr >> 4) | (attr << 4)) & 0x77);
- if (blink)
- attr ^= 0x80;
- if (intensity == 2)
- attr ^= 0x08;
- if (!can_do_color) {
- if (underline)
- attr = (attr & 0xf8) | 0x01;
- else if (intensity == 0)
- attr = (attr & 0xf0) | 0x08;
- }
- if (decscnm)
- video_erase_char = (((color & 0x88) | (((color >> 4) | (color << 4)) & 0x77)) << 8) | ' ';
- else
- video_erase_char = (color << 8) | ' ';
- }
-
- static void default_attr(int currcons)
- {
- intensity = 1;
- underline = 0;
- reverse = 0;
- blink = 0;
- color = def_color;
- }
-
- static void csi_m(int currcons)
- {
- int i;
-
- for (i=0;i<=npar;i++)
- switch (par[i]) {
- case 0: /* all attributes off */
- default_attr(currcons);
- break;
- case 1:
- intensity = 2;
- break;
- case 2:
- intensity = 0;
- break;
- case 4:
- underline = 1;
- break;
- case 5:
- blink = 1;
- break;
- case 7:
- reverse = 1;
- break;
- case 21:
- case 22:
- intensity = 1;
- break;
- case 24:
- underline = 0;
- break;
- case 25:
- blink = 0;
- break;
- case 27:
- reverse = 0;
- break;
- case 39:
- color = (def_color & 0x0f) | background;
- break;
- case 49:
- color = (def_color & 0xf0) | foreground;
- break;
- default:
- if (par[i] >= 30 && par[i] <= 37)
- color = color_table[par[i]-30]
- | background;
- else if (par[i] >= 40 && par[i] <= 47)
- color = (color_table[par[i]-40]<<4)
- | foreground;
- break;
- }
- update_attr(currcons);
- }
-
- static void respond_string(char * p, int currcons, struct tty_struct * tty)
- {
- while (*p) {
- put_tty_queue(*p, &tty->read_q);
- p++;
- }
- TTY_READ_FLUSH(tty);
- }
-
- static void respond_num(unsigned int n, int currcons, struct tty_struct * tty)
- {
- char buff[3];
- int i = 0;
-
- do {
- buff[i++] = (n%10)+'0';
- n /= 10;
- } while(n && i < 3); /* We'll take no chances */
- while (i--) {
- put_tty_queue(buff[i], &tty->read_q);
- }
- /* caller must flush */
- }
-
- static void cursor_report(int currcons, struct tty_struct * tty)
- {
- put_tty_queue('\033', &tty->read_q);
- put_tty_queue('[', &tty->read_q);
- respond_num(y + (decom ? top+1 : 1), currcons, tty);
- put_tty_queue(';', &tty->read_q);
- respond_num(x+1, currcons, tty);
- put_tty_queue('R', &tty->read_q);
- TTY_READ_FLUSH(tty);
- }
-
- static inline void status_report(int currcons, struct tty_struct * tty)
- {
- respond_string("\033[0n", currcons, tty); /* Terminal ok */
- }
-
- static inline void respond_ID(int currcons, struct tty_struct * tty)
- {
- respond_string(VT102ID, currcons, tty);
- }
-
- static void invert_screen(int currcons) {
- unsigned char *p;
-
- if (can_do_color)
- for (p = (unsigned char *)origin+1; p < (unsigned char *)scr_end; p+=2)
- *p = (*p & 0x88) | (((*p >> 4) | (*p << 4)) & 0x77);
- else
- for (p = (unsigned char *)origin+1; p < (unsigned char *)scr_end; p+=2)
- *p ^= *p & 0x07 == 1 ? 0x70 : 0x77;
- }
-
- static void set_mode(int currcons, int on_off)
- {
- int i;
-
- for (i=0; i<=npar; i++)
- if (ques) switch(par[i]) { /* DEC private modes set/reset */
- case 1: /* Cursor keys send ^[Ox/^[[x */
- if (on_off)
- set_kbd(decckm);
- else
- clr_kbd(decckm);
- break;
- case 3: /* 80/132 mode switch unimplemented */
- csi_J(currcons,2);
- gotoxy(currcons,0,0);
- break;
- case 5: /* Inverted screen on/off */
- if (decscnm != on_off) {
- decscnm = on_off;
- invert_screen(currcons);
- update_attr(currcons);
- }
- break;
- case 6: /* Origin relative/absolute */
- decom = on_off;
- gotoxy(currcons,0,0);
- break;
- case 7: /* Autowrap on/off */
- decawm = on_off;
- break;
- case 8: /* Autorepeat on/off */
- if (on_off)
- set_kbd(decarm);
- else
- clr_kbd(decarm);
- break;
- case 25: /* Cursor on/off */
- deccm = on_off;
- set_cursor(currcons);
- break;
- } else switch(par[i]) { /* ANSI modes set/reset */
- case 4: /* Insert Mode on/off */
- decim = on_off;
- break;
- case 20: /* Lf, Enter == CrLf/Lf */
- if (on_off)
- set_kbd(lnm);
- else
- clr_kbd(lnm);
- break;
- }
- }
-
- static void setterm_command(int currcons)
- {
- switch(par[0]) {
- case 1: /* set color for underline mode */
- if (can_do_color && par[1] < 16) {
- ulcolor = color_table[par[1]];
- if (underline)
- update_attr(currcons);
- }
- break;
- case 2: /* set color for half intensity mode */
- if (can_do_color && par[1] < 16) {
- halfcolor = color_table[par[1]];
- if (intensity == 0)
- update_attr(currcons);
- }
- break;
- case 8: /* store colors as defaults */
- def_color = attr;
- default_attr(currcons);
- update_attr(currcons);
- break;
- case 9: /* set blanking interval */
- blankinterval = ((par[1] < 60) ? par[1] : 60) * 60 * HZ;
- break;
- }
- }
-
- static void insert_char(int currcons)
- {
- unsigned int i = x;
- unsigned short tmp, old = video_erase_char;
- unsigned short * p = (unsigned short *) pos;
-
- while (i++ < video_num_columns) {
- tmp = *p;
- *p = old;
- old = tmp;
- p++;
- }
- need_wrap = 0;
- }
-
- static void insert_line(int currcons)
- {
- scrdown(currcons,y,bottom);
- need_wrap = 0;
- }
-
- static void delete_char(int currcons)
- {
- unsigned int i = x;
- unsigned short * p = (unsigned short *) pos;
-
- while (++i < video_num_columns) {
- *p = *(p+1);
- p++;
- }
- *p = video_erase_char;
- need_wrap = 0;
- }
-
- static void delete_line(int currcons)
- {
- scrup(currcons,y,bottom);
- need_wrap = 0;
- }
-
- static void csi_at(int currcons, unsigned int nr)
- {
- if (nr > video_num_columns)
- nr = video_num_columns;
- else if (!nr)
- nr = 1;
- while (nr--)
- insert_char(currcons);
- }
-
- static void csi_L(int currcons, unsigned int nr)
- {
- if (nr > video_num_lines)
- nr = video_num_lines;
- else if (!nr)
- nr = 1;
- while (nr--)
- insert_line(currcons);
- }
-
- static void csi_P(int currcons, unsigned int nr)
- {
- if (nr > video_num_columns)
- nr = video_num_columns;
- else if (!nr)
- nr = 1;
- while (nr--)
- delete_char(currcons);
- }
-
- static void csi_M(int currcons, unsigned int nr)
- {
- if (nr > video_num_lines)
- nr = video_num_lines;
- else if (!nr)
- nr=1;
- while (nr--)
- delete_line(currcons);
- }
-
- static void save_cur(int currcons)
- {
- saved_x = x;
- saved_y = y;
- s_intensity = intensity;
- s_underline = underline;
- s_blink = blink;
- s_reverse = reverse;
- s_charset = charset;
- s_color = color;
- saved_G0 = G0_charset;
- saved_G1 = G1_charset;
- }
-
- static void restore_cur(int currcons)
- {
- gotoxy(currcons,saved_x,saved_y);
- intensity = s_intensity;
- underline = s_underline;
- blink = s_blink;
- reverse = s_reverse;
- charset = s_charset;
- color = s_color;
- G0_charset = saved_G0;
- G1_charset = saved_G1;
- translate = charset ? G1_charset : G0_charset;
- update_attr(currcons);
- need_wrap = 0;
- }
-
- enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
- EShash, ESsetG0, ESsetG1, ESignore };
-
- static void reset_terminal(int currcons, int do_clear)
- {
- top = 0;
- bottom = video_num_lines;
- state = ESnormal;
- ques = 0;
- translate = NORM_TRANS;
- G0_charset = NORM_TRANS;
- G1_charset = GRAF_TRANS;
- charset = 0;
- need_wrap = 0;
-
- decscnm = 0;
- decom = 0;
- decawm = 1;
- deccm = 1;
- decim = 0;
-
- set_kbd(decarm);
- clr_kbd(decckm);
- clr_kbd(kbdapplic);
- clr_kbd(lnm);
- kbd_table[currcons].lockstate = 0;
- kbd_table[currcons].ledstate = kbd_table[currcons].default_ledstate;
- set_leds();
-
- default_attr(currcons);
- update_attr(currcons);
-
- tab_stop[0] = 0x01010100;
- tab_stop[1] =
- tab_stop[2] =
- tab_stop[3] =
- tab_stop[4] = 0x01010101;
-
- if (do_clear) {
- gotoxy(currcons,0,0);
- csi_J(currcons,2);
- save_cur(currcons);
- }
- }
-
- void con_write(struct tty_struct * tty)
- {
- int c;
- unsigned int currcons;
-
- currcons = tty->line - 1;
- if (currcons >= NR_CONSOLES) {
- printk("con_write: illegal tty (%d)\n", currcons);
- return;
- }
- #ifdef CONFIG_SELECTION
- /* clear the selection as soon as any characters are to be written
- out on the console holding the selection. */
- if (!EMPTY(&tty->write_q) && currcons == sel_cons)
- clear_selection();
- #endif /* CONFIG_SELECTION */
- disable_bh(KEYBOARD_BH);
- while (!tty->stopped && (c = get_tty_queue(&tty->write_q)) >= 0) {
- if (state == ESnormal && translate[c]) {
- if (need_wrap) {
- cr(currcons);
- lf(currcons);
- }
- if (decim)
- insert_char(currcons);
- c = translate[c];
- *(unsigned short *) pos = (attr << 8) + c;
- if (x == video_num_columns - 1)
- need_wrap = decawm;
- else {
- x++;
- pos+=2;
- }
- continue;
- }
-
- /*
- * Control characters can be used in the _middle_
- * of an escape sequence.
- */
- switch (c) {
- case 7:
- kd_mksound(0x637, HZ/8);
- continue;
- case 8:
- bs(currcons);
- continue;
- case 9:
- pos -= (x << 1);
- while (x < video_num_columns - 1) {
- x++;
- if (tab_stop[x >> 5] & (1 << (x & 31)))
- break;
- }
- pos += (x << 1);
- continue;
- case 10: case 11: case 12:
- lf(currcons);
- if (!is_kbd(lnm))
- continue;
- case 13:
- cr(currcons);
- continue;
- case 14:
- charset = 1;
- translate = G1_charset;
- continue;
- case 15:
- charset = 0;
- translate = G0_charset;
- continue;
- case 24: case 26:
- state = ESnormal;
- continue;
- case 27:
- state = ESesc;
- continue;
- case 127:
- del(currcons);
- continue;
- case 128+27:
- state = ESsquare;
- continue;
- }
- switch(state) {
- case ESesc:
- state = ESnormal;
- switch (c) {
- case '[':
- state = ESsquare;
- continue;
- case 'E':
- cr(currcons);
- lf(currcons);
- continue;
- case 'M':
- ri(currcons);
- continue;
- case 'D':
- lf(currcons);
- continue;
- case 'H':
- tab_stop[x >> 5] |= (1 << (x & 31));
- continue;
- case 'Z':
- respond_ID(currcons,tty);
- continue;
- case '7':
- save_cur(currcons);
- continue;
- case '8':
- restore_cur(currcons);
- continue;
- case '(':
- state = ESsetG0;
- continue;
- case ')':
- state = ESsetG1;
- continue;
- case '#':
- state = EShash;
- continue;
- case 'c':
- reset_terminal(currcons,1);
- continue;
- case '>': /* Numeric keypad */
- clr_kbd(kbdapplic);
- continue;
- case '=': /* Appl. keypad */
- set_kbd(kbdapplic);
- continue;
- }
- continue;
- case ESsquare:
- for(npar = 0 ; npar < NPAR ; npar++)
- par[npar] = 0;
- npar = 0;
- state = ESgetpars;
- if (c == '[') { /* Function key */
- state=ESfunckey;
- continue;
- }
- ques = (c=='?');
- if (ques)
- continue;
- case ESgetpars:
- if (c==';' && npar<NPAR-1) {
- npar++;
- continue;
- } else if (c>='0' && c<='9') {
- par[npar] *= 10;
- par[npar] += c-'0';
- continue;
- } else state=ESgotpars;
- case ESgotpars:
- state = ESnormal;
- switch(c) {
- case 'h':
- set_mode(currcons,1);
- continue;
- case 'l':
- set_mode(currcons,0);
- continue;
- case 'n':
- if (!ques)
- if (par[0] == 5)
- status_report(currcons,tty);
- else if (par[0] == 6)
- cursor_report(currcons,tty);
- continue;
- }
- if (ques) {
- ques = 0;
- continue;
- }
- switch(c) {
- case 'G': case '`':
- if (par[0]) par[0]--;
- gotoxy(currcons,par[0],y);
- continue;
- case 'A':
- if (!par[0]) par[0]++;
- gotoxy(currcons,x,y-par[0]);
- continue;
- case 'B': case 'e':
- if (!par[0]) par[0]++;
- gotoxy(currcons,x,y+par[0]);
- continue;
- case 'C': case 'a':
- if (!par[0]) par[0]++;
- gotoxy(currcons,x+par[0],y);
- continue;
- case 'D':
- if (!par[0]) par[0]++;
- gotoxy(currcons,x-par[0],y);
- continue;
- case 'E':
- if (!par[0]) par[0]++;
- gotoxy(currcons,0,y+par[0]);
- continue;
- case 'F':
- if (!par[0]) par[0]++;
- gotoxy(currcons,0,y-par[0]);
- continue;
- case 'd':
- if (par[0]) par[0]--;
- gotoxy(currcons,x,par[0]);
- continue;
- case 'H': case 'f':
- if (par[0]) par[0]--;
- if (par[1]) par[1]--;
- gotoxy(currcons,par[1],par[0]);
- continue;
- case 'J':
- csi_J(currcons,par[0]);
- continue;
- case 'K':
- csi_K(currcons,par[0]);
- continue;
- case 'L':
- csi_L(currcons,par[0]);
- continue;
- case 'M':
- csi_M(currcons,par[0]);
- continue;
- case 'P':
- csi_P(currcons,par[0]);
- continue;
- case 'c':
- if (!par[0])
- respond_ID(currcons,tty);
- continue;
- case 'g':
- if (!par[0])
- tab_stop[x >> 5] &= ~(1 << (x & 31));
- else if (par[0] == 3) {
- tab_stop[0] =
- tab_stop[1] =
- tab_stop[2] =
- tab_stop[3] =
- tab_stop[4] = 0;
- }
- continue;
- case 'm':
- csi_m(currcons);
- continue;
- case 'r':
- if (!par[0])
- par[0]++;
- if (!par[1])
- par[1] = video_num_lines;
- /* Minimum allowed region is 2 lines */
- if (par[0] < par[1] &&
- par[1] <= video_num_lines) {
- top=par[0]-1;
- bottom=par[1];
- gotoxy(currcons,0,0);
- }
- continue;
- case 's':
- save_cur(currcons);
- continue;
- case 'u':
- restore_cur(currcons);
- continue;
- case '@':
- csi_at(currcons,par[0]);
- continue;
- case ']': /* setterm functions */
- setterm_command(currcons);
- continue;
- }
- continue;
- case ESfunckey:
- state = ESnormal;
- continue;
- case EShash:
- state = ESnormal;
- if (c == '8') {
- /* DEC screen alignment test. kludge :-) */
- video_erase_char =
- (video_erase_char & 0xff00) | 'E';
- csi_J(currcons, 2);
- video_erase_char =
- (video_erase_char & 0xff00) | ' ';
- }
- continue;
- case ESsetG0:
- if (c == '0')
- G0_charset = GRAF_TRANS;
- else if (c == 'B')
- G0_charset = NORM_TRANS;
- else if (c == 'U')
- G0_charset = NULL_TRANS;
- else if (c == 'K')
- G0_charset = USER_TRANS;
- if (charset == 0)
- translate = G0_charset;
- state = ESnormal;
- continue;
- case ESsetG1:
- if (c == '0')
- G1_charset = GRAF_TRANS;
- else if (c == 'B')
- G1_charset = NORM_TRANS;
- else if (c == 'U')
- G1_charset = NULL_TRANS;
- else if (c == 'K')
- G1_charset = USER_TRANS;
- if (charset == 1)
- translate = G1_charset;
- state = ESnormal;
- continue;
- default:
- state = ESnormal;
- }
- }
- if (vcmode != KD_GRAPHICS)
- set_cursor(currcons);
- enable_bh(KEYBOARD_BH);
- if (LEFT(&tty->write_q) > WAKEUP_CHARS)
- wake_up_interruptible(&tty->write_q.proc_list);
- }
-
- void do_keyboard_interrupt(void)
- {
- TTY_READ_FLUSH(TTY_TABLE(0));
- timer_active &= ~(1<<BLANK_TIMER);
- if (vt_cons[fg_console].vc_mode == KD_GRAPHICS)
- return;
- if (console_blanked) {
- timer_table[BLANK_TIMER].expires = 0;
- timer_active |= 1<<BLANK_TIMER;
- } else if (blankinterval) {
- timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
- timer_active |= 1<<BLANK_TIMER;
- }
- }
-
- void * memsetw(void * s,unsigned short c,int count)
- {
- __asm__("cld\n\t"
- "rep\n\t"
- "stosw"
- : /* no output */
- :"a" (c),"D" (s),"c" (count)
- :"cx","di");
- return s;
- }
-
- void console_print(const char * b)
- {
- int currcons = fg_console;
- unsigned char c;
-
- if (!printable || currcons<0 || currcons>=NR_CONSOLES)
- return;
- while ((c = *(b++)) != 0) {
- if (c == 10 || c == 13 || need_wrap) {
- if (c != 13)
- lf(currcons);
- cr(currcons);
- if (c == 10 || c == 13)
- continue;
- }
- *(unsigned short *) pos = (attr << 8) + c;
- if (x == video_num_columns - 1) {
- need_wrap = 1;
- continue;
- }
- x++;
- pos+=2;
- }
- set_cursor(currcons);
- if (vt_cons[fg_console].vc_mode == KD_GRAPHICS)
- return;
- timer_active &= ~(1<<BLANK_TIMER);
- if (console_blanked) {
- timer_table[BLANK_TIMER].expires = 0;
- timer_active |= 1<<BLANK_TIMER;
- } else if (blankinterval) {
- timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
- timer_active |= 1<<BLANK_TIMER;
- }
- }
-
- /*
- * long con_init(long);
- *
- * 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.
- */
- long con_init(long kmem_start)
- {
- char *display_desc = "????";
- int currcons = 0;
- long base;
- int orig_x = ORIG_X;
- int orig_y = ORIG_Y;
-
- vc_scrmembuf = (unsigned short *) kmem_start;
- video_num_columns = ORIG_VIDEO_COLS;
- video_size_row = video_num_columns * 2;
- video_num_lines = ORIG_VIDEO_LINES;
- video_page = ORIG_VIDEO_PAGE;
- screen_size = (video_num_lines * video_size_row);
- kmem_start += NR_CONSOLES * screen_size;
- timer_table[BLANK_TIMER].fn = blank_screen;
- timer_table[BLANK_TIMER].expires = 0;
- if (blankinterval) {
- timer_table[BLANK_TIMER].expires = jiffies+blankinterval;
- timer_active |= 1<<BLANK_TIMER;
- }
-
- if (ORIG_VIDEO_MODE == 7) /* Is this a monochrome display? */
- {
- video_mem_base = 0xb0000;
- video_port_reg = 0x3b4;
- video_port_val = 0x3b5;
- if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
- {
- video_type = VIDEO_TYPE_EGAM;
- video_mem_term = 0xb8000;
- display_desc = "EGA+";
- }
- else
- {
- video_type = VIDEO_TYPE_MDA;
- video_mem_term = 0xb2000;
- display_desc = "*MDA";
- }
- }
- else /* If not, it is color. */
- {
- can_do_color = 1;
- video_mem_base = 0xb8000;
- video_port_reg = 0x3d4;
- video_port_val = 0x3d5;
- if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
- {
- video_type = VIDEO_TYPE_EGAC;
- video_mem_term = 0xc0000;
- display_desc = "EGA+";
- }
- else
- {
- video_type = VIDEO_TYPE_CGA;
- video_mem_term = 0xba000;
- display_desc = "*CGA";
- }
- }
-
- /* Initialize the variables used for scrolling (mostly EGA/VGA) */
-
- base = (long)vc_scrmembuf;
- for (currcons = 0; currcons<NR_CONSOLES; currcons++) {
- pos = origin = video_mem_start = base;
- scr_end = video_mem_end = (base += screen_size);
- vc_scrbuf[currcons] = (unsigned short *) origin;
- vcmode = KD_TEXT;
- vtmode.mode = VT_AUTO;
- vtmode.waitv = 0;
- vtmode.relsig = 0;
- vtmode.acqsig = 0;
- vtmode.frsig = 0;
- vtpid = -1;
- vtnewvt = -1;
- clr_kbd(kbdraw);
- def_color = 0x07; /* white */
- ulcolor = 0x0f; /* bold white */
- halfcolor = 0x08; /* grey */
- reset_terminal(currcons, currcons);
- }
- currcons = fg_console = 0;
-
- video_mem_start = video_mem_base;
- video_mem_end = video_mem_term;
- origin = video_mem_start;
- scr_end = video_mem_start + video_num_lines * video_size_row;
- gotoxy(currcons,0,0);
- save_cur(currcons);
- gotoxy(currcons,orig_x,orig_y);
- update_screen(fg_console);
- printable = 1;
- printk("Console: %s %s %ldx%ld, %d virtual consoles\n",
- can_do_color?"colour":"mono",
- display_desc,
- video_num_columns,video_num_lines,
- NR_CONSOLES);
- register_console(console_print);
- return kmem_start;
- }
-
- /*
- * kbdsave doesn't need to do anything: it's all handled automatically
- * with the new data structures..
- */
- void kbdsave(int new_console)
- {
- }
-
- static void get_scrmem(int currcons)
- {
- memcpy((void *)vc_scrbuf[currcons],(void *)origin, screen_size);
- video_mem_start = (unsigned long)vc_scrbuf[currcons];
- origin = video_mem_start;
- scr_end = video_mem_end = video_mem_start+screen_size;
- pos = origin + y*video_size_row + (x<<1);
- }
-
- static void set_scrmem(int currcons)
- {
- #ifdef CONFIG_HGA
- /* This works with XFree86 1.2, 1.3 and 2.0
- This code could be extended and made more generally useful if we could
- determine the actual video mode. It appears that this should be
- possible on a genuine Hercules card, but I (WM) haven't been able to
- read from any of the required registers on my clone card.
- */
- /* This code should work with Hercules and MDA cards. */
- if (video_type == VIDEO_TYPE_MDA)
- {
- if (vcmode == KD_TEXT)
- {
- /* Ensure that the card is in text mode. */
- int i;
- static char herc_txt_tbl[12] = {
- 0x61,0x50,0x52,0x0f,0x19,6,0x19,0x19,2,0x0d,0x0b,0x0c };
- outb_p(0, 0x3bf); /* Back to power-on defaults */
- outb_p(0, 0x3b8); /* Blank the screen, select page 0, etc */
- for ( i = 0 ; i < 12 ; i++ )
- {
- outb_p(i, 0x3b4);
- outb_p(herc_txt_tbl[i], 0x3b5);
- }
- }
- #define HGA_BLINKER_ON 0x20
- #define HGA_SCREEN_ON 8
- /* Make sure that the hardware is not blanked */
- outb_p(HGA_BLINKER_ON | HGA_SCREEN_ON, 0x3b8);
- }
- #endif CONFIG_HGA
-
- video_mem_start = video_mem_base;
- video_mem_end = video_mem_term;
- origin = video_mem_start;
- scr_end = video_mem_start + screen_size;
- pos = origin + y*video_size_row + (x<<1);
- memcpy((void *)video_mem_base, (void *)vc_scrbuf[fg_console], screen_size);
- }
-
- void blank_screen(void)
- {
- if (console_blanked)
- return;
- timer_table[BLANK_TIMER].fn = unblank_screen;
- get_scrmem(fg_console);
- hide_cursor();
- console_blanked = 1;
- memsetw((void *)video_mem_base, 0x0020, video_mem_term-video_mem_base );
- }
-
- void unblank_screen(void)
- {
- if (!console_blanked)
- return;
- timer_table[BLANK_TIMER].fn = blank_screen;
- if (blankinterval) {
- timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
- timer_active |= 1<<BLANK_TIMER;
- }
- console_blanked = 0;
- set_scrmem(fg_console);
- set_origin(fg_console);
- set_cursor(fg_console);
- }
-
- void update_screen(int new_console)
- {
- static int lock = 0;
-
- if (new_console == fg_console || lock)
- return;
- lock = 1;
- kbdsave(new_console);
- get_scrmem(fg_console);
- fg_console = new_console;
- set_scrmem(fg_console);
- set_origin(fg_console);
- set_cursor(new_console);
- set_leds();
- compute_shiftstate();
- lock = 0;
- }
-
- int do_screendump(int arg)
- {
- char *sptr, *buf = (char *)arg;
- int currcons, l;
-
- if (!suser())
- return -EPERM;
- l = verify_area(VERIFY_WRITE, buf,2+video_num_columns*video_num_lines);
- if (l)
- return l;
- currcons = get_fs_byte(buf+1);
- if ((currcons<0) || (currcons>NR_CONSOLES))
- return -EIO;
- put_fs_byte((char)(video_num_lines),buf++);
- put_fs_byte((char)(video_num_columns),buf++);
- currcons = (currcons ? currcons-1 : fg_console);
- sptr = (char *) origin;
- for (l=video_num_lines*video_num_columns; l>0 ; l--, sptr++)
- put_fs_byte(*sptr++,buf++);
- return(0);
- }
-
- /*
- * All we do is set the write and ioctl subroutines; later on maybe we'll
- * dynamically allocate the console screen memory.
- */
- int con_open(struct tty_struct *tty, struct file * filp)
- {
- tty->write = con_write;
- tty->ioctl = vt_ioctl;
- if (tty->line > NR_CONSOLES)
- return -ENODEV;
- return 0;
- }
-
- #ifdef CONFIG_SELECTION
- /* correction factor for when screen is hardware-scrolled */
- #define hwscroll_offset (currcons == fg_console ? ((__real_origin - __origin) << 1) : 0)
-
- /* set reverse video on characters s-e of console with selection. */
- static void highlight(const int currcons, const int s, const int e)
- {
- unsigned char *p, *p1, *p2;
-
- p1 = (unsigned char *)origin - hwscroll_offset + s + 1;
- p2 = (unsigned char *)origin - hwscroll_offset + e + 1;
- if (p1 > p2)
- {
- p = p1;
- p1 = p2;
- p2 = p;
- }
- for (p = p1; p <= p2; p += 2)
- *p = (*p & 0x88) | ((*p << 4) & 0x70) | ((*p >> 4) & 0x07);
- }
-
- /* is c in range [a-zA-Z0-9_]? */
- static inline int inword(const char c) { return (isalnum(c) || c == '_'); }
-
- /* does screen address p correspond to character at LH/RH edge of screen? */
- static inline int atedge(const int p)
- {
- return (!(p % video_size_row) || !((p + 2) % video_size_row));
- }
-
- /* constrain v such that l <= v <= u */
- static inline short limit(const int v, const int l, const int u)
- {
- return (v < l) ? l : ((v > u) ? u : v);
- }
-
- /* set the current selection. Invoked by ioctl(). */
- int set_selection(const int arg)
- {
- unsigned short *args, xs, ys, xe, ye;
- int currcons = fg_console;
- int sel_mode, new_sel_start, new_sel_end, spc;
- char *bp, *obp, *spos;
- int i, ps, pe;
- char *off = (char *)origin - hwscroll_offset;
-
- unblank_screen();
- args = (unsigned short *)(arg + 1);
- xs = get_fs_word(args++) - 1;
- ys = get_fs_word(args++) - 1;
- xe = get_fs_word(args++) - 1;
- ye = get_fs_word(args++) - 1;
- sel_mode = get_fs_word(args);
-
- xs = limit(xs, 0, video_num_columns - 1);
- ys = limit(ys, 0, video_num_lines - 1);
- xe = limit(xe, 0, video_num_columns - 1);
- ye = limit(ye, 0, video_num_lines - 1);
- ps = ys * video_size_row + (xs << 1);
- pe = ye * video_size_row + (xe << 1);
-
- if (ps > pe) /* make sel_start <= sel_end */
- {
- int tmp = ps;
- ps = pe;
- pe = tmp;
- }
-
- switch (sel_mode)
- {
- case 0: /* character-by-character selection */
- default:
- new_sel_start = ps;
- new_sel_end = pe;
- break;
- case 1: /* word-by-word selection */
- spc = isspace(*(off + ps));
- for (new_sel_start = ps; ; ps -= 2)
- {
- if ((spc && !isspace(*(off + ps))) ||
- (!spc && !inword(*(off + ps))))
- break;
- new_sel_start = ps;
- if (!(ps % video_size_row))
- break;
- }
- spc = isspace(*(off + pe));
- for (new_sel_end = pe; ; pe += 2)
- {
- if ((spc && !isspace(*(off + pe))) ||
- (!spc && !inword(*(off + pe))))
- break;
- new_sel_end = pe;
- if (!((pe + 2) % video_size_row))
- break;
- }
- break;
- case 2: /* line-by-line selection */
- new_sel_start = ps - ps % video_size_row;
- new_sel_end = pe + video_size_row
- - pe % video_size_row - 2;
- break;
- }
- /* select to end of line if on trailing space */
- if (new_sel_end > new_sel_start &&
- !atedge(new_sel_end) && isspace(*(off + new_sel_end)))
- {
- for (pe = new_sel_end + 2; ; pe += 2)
- {
- if (!isspace(*(off + pe)) || atedge(pe))
- break;
- }
- if (isspace(*(off + pe)))
- new_sel_end = pe;
- }
- if (sel_cons != currcons)
- {
- clear_selection();
- sel_cons = currcons;
- }
- if (sel_start == -1) /* no current selection */
- highlight(sel_cons, new_sel_start, new_sel_end);
- else if (new_sel_start == sel_start)
- {
- if (new_sel_end == sel_end) /* no action required */
- return 0;
- else if (new_sel_end > sel_end) /* extend to right */
- highlight(sel_cons, sel_end + 2, new_sel_end);
- else /* contract from right */
- highlight(sel_cons, new_sel_end + 2, sel_end);
- }
- else if (new_sel_end == sel_end)
- {
- if (new_sel_start < sel_start) /* extend to left */
- highlight(sel_cons, new_sel_start, sel_start - 2);
- else /* contract from left */
- highlight(sel_cons, sel_start, new_sel_start - 2);
- }
- else /* some other case; start selection from scratch */
- {
- clear_selection();
- highlight(sel_cons, new_sel_start, new_sel_end);
- }
- sel_start = new_sel_start;
- sel_end = new_sel_end;
- obp = bp = sel_buffer;
- for (i = sel_start; i <= sel_end; i += 2)
- {
- spos = (char *)off + i;
- *bp++ = *spos;
- if (!isspace(*spos))
- obp = bp;
- if (! ((i + 2) % video_size_row))
- {
- /* strip trailing blanks from line and add newline,
- unless non-space at end of line. */
- if (obp != bp)
- {
- bp = obp;
- *bp++ = '\r';
- }
- obp = bp;
- }
- /* check for space, leaving room for next character, possible
- newline, and null at end. */
- if (bp - sel_buffer > SEL_BUFFER_SIZE - 3)
- break;
- }
- *bp = '\0';
- return 0;
- }
-
- /* insert the contents of the selection buffer into the queue of the
- tty associated with the current console. Invoked by ioctl(). */
- int paste_selection(struct tty_struct *tty)
- {
- char *bp = sel_buffer;
-
- if (! *bp)
- return 0;
- unblank_screen();
- while (*bp) {
- put_tty_queue(*bp, &tty->read_q);
- bp++;
- TTY_READ_FLUSH(tty);
- }
- return 0;
- }
-
- /* remove the current selection highlight, if any, from the console holding
- the selection. */
- static void clear_selection()
- {
- if (sel_start != -1)
- {
- highlight(sel_cons, sel_start, sel_end);
- sel_start = -1;
- }
- }
- #endif /* CONFIG_SELECTION */
-
- /*
- * PIO_FONT support.
- *
- * The font loading code goes back to the codepage package by
- * Joel Hoffman (joel@wam.umd.edu). (He reports that the original
- * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2
- * Video Systems_ by Richard Wilton. 1987. Microsoft Press".)
- *
- * Change for certain monochrome monitors by Yury Shevchuck
- * (sizif@botik.yaroslavl.su).
- */
-
- #define colourmap ((char *)0xa0000)
- #define blackwmap ((char *)0xb0000)
- #define cmapsz 8192
- #define seq_port_reg (0x3c4)
- #define seq_port_val (0x3c5)
- #define gr_port_reg (0x3ce)
- #define gr_port_val (0x3cf)
-
- static int set_get_font(char * arg, int set)
- {
- #ifdef CAN_LOAD_EGA_FONTS
- int i;
- char *charmap;
- int beg;
-
- /* no use to "load" CGA... */
-
- if (video_type == VIDEO_TYPE_EGAC) {
- charmap = colourmap;
- beg = 0x0e;
- } else if (video_type == VIDEO_TYPE_EGAM) {
- charmap = blackwmap;
- beg = 0x0a;
- } else
- return -EINVAL;
-
- i = verify_area(set ? VERIFY_READ : VERIFY_WRITE, (void *)arg, cmapsz);
- if (i)
- return i;
-
- cli();
- outb_p( 0x00, seq_port_reg ); /* First, the sequencer */
- outb_p( 0x01, seq_port_val ); /* Synchronous reset */
- outb_p( 0x02, seq_port_reg );
- outb_p( 0x04, seq_port_val ); /* CPU writes only to map 2 */
- outb_p( 0x04, seq_port_reg );
- outb_p( 0x07, seq_port_val ); /* Sequential addressing */
- outb_p( 0x00, seq_port_reg );
- outb_p( 0x03, seq_port_val ); /* Clear synchronous reset */
-
- outb_p( 0x04, gr_port_reg ); /* Now, the graphics controller */
- outb_p( 0x02, gr_port_val ); /* select map 2 */
- outb_p( 0x05, gr_port_reg );
- outb_p( 0x00, gr_port_val ); /* disable odd-even addressing */
- outb_p( 0x06, gr_port_reg );
- outb_p( 0x00, gr_port_val ); /* map start at A000:0000 */
- sti();
-
- if (set)
- for (i=0; i<cmapsz ; i++)
- *(charmap+i) = get_fs_byte(arg+i);
- else
- for (i=0; i<cmapsz ; i++)
- put_fs_byte(*(charmap+i), arg+i);
-
- cli();
- outb_p( 0x00, seq_port_reg ); /* Frist, the sequencer */
- outb_p( 0x01, seq_port_val ); /* Synchronous reset */
- outb_p( 0x02, seq_port_reg );
- outb_p( 0x03, seq_port_val ); /* CPU writes to maps 0 and 1 */
- outb_p( 0x04, seq_port_reg );
- outb_p( 0x03, seq_port_val ); /* odd-even addressing */
- outb_p( 0x00, seq_port_reg );
- outb_p( 0x03, seq_port_val ); /* clear synchronous reset */
-
- outb_p( 0x04, gr_port_reg ); /* Now, the graphics controller */
- outb_p( 0x00, gr_port_val ); /* select map 0 for CPU */
- outb_p( 0x05, gr_port_reg );
- outb_p( 0x10, gr_port_val ); /* enable even-odd addressing */
- outb_p( 0x06, gr_port_reg );
- outb_p( beg, gr_port_val ); /* map starts at b800:0 or b000:0 */
- sti();
-
- return 0;
- #else
- return -EINVAL;
- #endif
- }
-
- /*
- * Load font into the EGA/VGA character generator. arg points to a 8192
- * byte map, 32 bytes per character. Only first H of them are used for
- * 8xH fonts (0 < H <= 32).
- */
-
- int con_set_font (char *arg)
- {
- return set_get_font (arg,1);
- }
-
- int con_get_font (char *arg)
- {
- return set_get_font (arg,0);
- }
-
- /*
- * Load customizable translation table (USER_TRANS[]). All checks are here,
- * so we need only include 'return con_set_trans(arg)' in the ioctl handler
- * arg points to a 256 byte translation table.
- */
- int con_set_trans(char * arg)
- {
- int i;
-
- i = verify_area(VERIFY_READ, (void *)arg, E_TABSZ);
- if (i)
- return i;
-
- for (i=0; i<E_TABSZ ; i++) USER_TRANS[i] = get_fs_byte(arg+i);
- USER_TRANS[012]=0;
- USER_TRANS[014]=0;
- USER_TRANS[015]=0;
- USER_TRANS[033]=0;
- return 0;
- }
-
- int con_get_trans(char * arg)
- {
- int i;
-
- i = verify_area(VERIFY_WRITE, (void *)arg, E_TABSZ);
- if (i)
- return i;
-
- for (i=0; i<E_TABSZ ; i++) put_fs_byte(USER_TRANS[i],arg+i);
- return 0;
- }
-