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  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup console
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <libc.h>
  36. #include <fb.h>
  37. #include <ipc/ipc.h>
  38. #include <kbd.h>
  39. #include <kbd/keycode.h>
  40. #include <ipc/fb.h>
  41. #include <ipc/services.h>
  42. #include <errno.h>
  43. #include <key_buffer.h>
  44. #include <ipc/console.h>
  45. #include <unistd.h>
  46. #include <async.h>
  47. #include <libadt/fifo.h>
  48. #include <screenbuffer.h>
  49. #include <sys/mman.h>
  50. #include <stdio.h>
  51. #include <string.h>
  52. #include <sysinfo.h>
  53. #include <event.h>
  54.  
  55. #include "console.h"
  56. #include "gcons.h"
  57.  
  58. #define NAME  "console"
  59.  
  60. #define MAX_KEYREQUESTS_BUFFERED  32
  61.  
  62. /** Size of cwrite_buf. */
  63. #define CWRITE_BUF_SIZE  256
  64.  
  65. /** Index of currently used virtual console.
  66.  */
  67. int active_console = 0;
  68. int prev_console = 0;
  69.  
  70. /** Phone to the keyboard driver. */
  71. static int kbd_phone;
  72.  
  73. /** Information about framebuffer */
  74. struct {
  75.     int phone;      /**< Framebuffer phone */
  76.     ipcarg_t rows;  /**< Framebuffer rows */
  77.     ipcarg_t cols;  /**< Framebuffer columns */
  78. } fb_info;
  79.  
  80. typedef struct {
  81.     keybuffer_t keybuffer;        /**< Buffer for incoming keys. */
  82.    
  83.     /** Buffer for unsatisfied request for keys. */
  84.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  85.         MAX_KEYREQUESTS_BUFFERED);
  86.    
  87.     int keyrequest_counter;       /**< Number of requests in buffer. */
  88.     int client_phone;             /**< Phone to connected client. */
  89.     int used;                     /**< 1 if this virtual console is
  90.                                        connected to some client. */
  91.     screenbuffer_t screenbuffer;  /**< Screenbuffer for saving screen
  92.                                        contents and related settings. */
  93. } connection_t;
  94.  
  95. /** Array of data for virtual consoles */
  96. static connection_t connections[CONSOLE_COUNT];
  97.  
  98. /** Pointer to memory shared with framebufer used for
  99.     faster virtual console switching */
  100. static keyfield_t *interbuffer = NULL;
  101.  
  102. /** Information on row-span yet unsent to FB driver. */
  103. struct {
  104.     int row;  /**< Row where the span lies. */
  105.     int col;  /**< Leftmost column of the span. */
  106.     int cnt;  /**< Width of the span. */
  107. } fb_pending;
  108.  
  109. /** Buffer for receiving data via the CONSOLE_WRITE call from the client. */
  110. static char cwrite_buf[CWRITE_BUF_SIZE];
  111.  
  112. /** Find unused virtual console.
  113.  *
  114.  */
  115. static int find_free_connection(void)
  116. {
  117.     int i;
  118.    
  119.     for (i = 0; i < CONSOLE_COUNT; i++) {
  120.         if (!connections[i].used)
  121.             return i;
  122.     }
  123.    
  124.     return -1;
  125. }
  126.  
  127. static void clrscr(void)
  128. {
  129.     async_msg_0(fb_info.phone, FB_CLEAR);
  130. }
  131.  
  132. static void curs_visibility(bool visible)
  133. {
  134.     async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, visible);
  135. }
  136.  
  137. static void curs_hide_sync(void)
  138. {
  139.     ipc_call_sync_1_0(fb_info.phone, FB_CURSOR_VISIBILITY, false);
  140. }
  141.  
  142. static void curs_goto(int row, int col)
  143. {
  144.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  145. }
  146.  
  147. static void screen_yield(void)
  148. {
  149.     ipc_call_sync_0_0(fb_info.phone, FB_SCREEN_YIELD);
  150. }
  151.  
  152. static void screen_reclaim(void)
  153. {
  154.     ipc_call_sync_0_0(fb_info.phone, FB_SCREEN_RECLAIM);
  155. }
  156.  
  157. static void kbd_yield(void)
  158. {
  159.     ipc_call_sync_0_0(kbd_phone, KBD_YIELD);
  160. }
  161.  
  162. static void kbd_reclaim(void)
  163. {
  164.     ipc_call_sync_0_0(kbd_phone, KBD_RECLAIM);
  165. }
  166.  
  167. static void set_style(int style)
  168. {
  169.     async_msg_1(fb_info.phone, FB_SET_STYLE, style);
  170. }
  171.  
  172. static void set_color(int fgcolor, int bgcolor, int flags)
  173. {
  174.     async_msg_3(fb_info.phone, FB_SET_COLOR, fgcolor, bgcolor, flags);
  175. }
  176.  
  177. static void set_rgb_color(int fgcolor, int bgcolor)
  178. {
  179.     async_msg_2(fb_info.phone, FB_SET_RGB_COLOR, fgcolor, bgcolor);
  180. }
  181.  
  182. static void set_attrs(attrs_t *attrs)
  183. {
  184.     switch (attrs->t) {
  185.     case at_style:
  186.         set_style(attrs->a.s.style);
  187.         break;
  188.     case at_idx:
  189.         set_color(attrs->a.i.fg_color, attrs->a.i.bg_color,
  190.             attrs->a.i.flags);
  191.         break;
  192.     case at_rgb:
  193.         set_rgb_color(attrs->a.r.fg_color, attrs->a.r.bg_color);
  194.         break;
  195.     }
  196. }
  197.  
  198. /** Send an area of screenbuffer to the FB driver. */
  199. static void fb_update_area(connection_t *conn, int x, int y, int w, int h)
  200. {
  201.     int i;
  202.     int j;
  203.     attrs_t *attrs;
  204.     keyfield_t *field;
  205.    
  206.     if (interbuffer) {
  207.         for (j = 0; j < h; j++) {
  208.             for (i = 0; i < w; i++) {
  209.                 interbuffer[i + j * w] =
  210.                     *get_field_at(&conn->screenbuffer, x + i, y + j);
  211.             }
  212.         }
  213.        
  214.         async_req_4_0(fb_info.phone, FB_DRAW_TEXT_DATA,
  215.             x, y, w, h);
  216.     }
  217. }
  218.  
  219. /** Flush pending cells to FB. */
  220. static void fb_pending_flush(void)
  221. {
  222.     screenbuffer_t *scr
  223.         = &(connections[active_console].screenbuffer);
  224.    
  225.     if (fb_pending.cnt > 0) {
  226.         fb_update_area(&connections[active_console], fb_pending.col,
  227.             fb_pending.row, fb_pending.cnt, 1);
  228.         fb_pending.cnt = 0;
  229.     }
  230. }
  231.  
  232. /** Mark a character cell as changed.
  233.  *
  234.  * This adds the cell to the pending rowspan if possible. Otherwise
  235.  * the old span is flushed first.
  236.  *
  237.  */
  238. static void cell_mark_changed(int row, int col)
  239. {
  240.     if (fb_pending.cnt != 0) {
  241.         if ((row != fb_pending.row)
  242.             || (col != fb_pending.col + fb_pending.cnt)) {
  243.             fb_pending_flush();
  244.         }
  245.     }
  246.    
  247.     if (fb_pending.cnt == 0) {
  248.         fb_pending.row = row;
  249.         fb_pending.col = col;
  250.     }
  251.    
  252.     fb_pending.cnt++;
  253. }
  254.  
  255. /** Print a character to the active VC with buffering. */
  256. static void fb_putchar(wchar_t c, int row, int col)
  257. {
  258.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  259. }
  260.  
  261. /** Process a character from the client (TTY emulation). */
  262. static void write_char(int console, wchar_t ch)
  263. {
  264.     bool flush_cursor = false;
  265.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  266.    
  267.     switch (ch) {
  268.     case '\n':
  269.         fb_pending_flush();
  270.         flush_cursor = true;
  271.         scr->position_y++;
  272.         scr->position_x = 0;
  273.         break;
  274.     case '\r':
  275.         break;
  276.     case '\t':
  277.         scr->position_x += 8;
  278.         scr->position_x -= scr->position_x % 8;
  279.         break;
  280.     case '\b':
  281.         if (scr->position_x == 0)
  282.             break;
  283.         scr->position_x--;
  284.         if (console == active_console)
  285.             cell_mark_changed(scr->position_y, scr->position_x);
  286.         screenbuffer_putchar(scr, ' ');
  287.         break;
  288.     default:
  289.         if (console == active_console)
  290.             cell_mark_changed(scr->position_y, scr->position_x);
  291.        
  292.         screenbuffer_putchar(scr, ch);
  293.         scr->position_x++;
  294.     }
  295.    
  296.     if (scr->position_x >= scr->size_x) {
  297.         flush_cursor = true;
  298.         scr->position_y++;
  299.     }
  300.    
  301.     if (scr->position_y >= scr->size_y) {
  302.         fb_pending_flush();
  303.         scr->position_y = scr->size_y - 1;
  304.         screenbuffer_clear_line(scr, scr->top_line);
  305.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  306.         if (console == active_console)
  307.             async_msg_1(fb_info.phone, FB_SCROLL, 1);
  308.     }
  309.    
  310.     scr->position_x = scr->position_x % scr->size_x;
  311.    
  312.     if (console == active_console && flush_cursor)
  313.         curs_goto(scr->position_y, scr->position_x);
  314. }
  315.  
  316. /** Switch to new console */
  317. static void change_console(int newcons)
  318. {
  319.     connection_t *conn;
  320.     int i;
  321.     int j;
  322.     int rc;
  323.     keyfield_t *field;
  324.     attrs_t *attrs;
  325.    
  326.     if (newcons == active_console)
  327.         return;
  328.    
  329.     fb_pending_flush();
  330.    
  331.     if (newcons == KERNEL_CONSOLE) {
  332.         async_serialize_start();
  333.         curs_hide_sync();
  334.         gcons_in_kernel();
  335.         screen_yield();
  336.         kbd_yield();
  337.         async_serialize_end();
  338.        
  339.        
  340.         if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE)) {
  341.             prev_console = active_console;
  342.             active_console = KERNEL_CONSOLE;
  343.         } else
  344.             newcons = active_console;
  345.     }
  346.    
  347.     if (newcons != KERNEL_CONSOLE) {
  348.         async_serialize_start();
  349.        
  350.         if (active_console == KERNEL_CONSOLE) {
  351.             screen_reclaim();
  352.             kbd_reclaim();
  353.             gcons_redraw_console();
  354.         }
  355.        
  356.         active_console = newcons;
  357.         gcons_change_console(newcons);
  358.         conn = &connections[active_console];
  359.        
  360.         set_attrs(&conn->screenbuffer.attrs);
  361.         curs_visibility(false);
  362.         if (interbuffer) {
  363.             for (j = 0; j < conn->screenbuffer.size_y; j++) {
  364.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  365.                     unsigned int size_x;
  366.                    
  367.                     size_x = conn->screenbuffer.size_x;
  368.                     interbuffer[j * size_x + i] =
  369.                         *get_field_at(&conn->screenbuffer, i, j);
  370.                 }
  371.             }
  372.             /* This call can preempt, but we are already at the end */
  373.             rc = async_req_4_0(fb_info.phone, FB_DRAW_TEXT_DATA,
  374.                 0, 0, conn->screenbuffer.size_x,
  375.                 conn->screenbuffer.size_y);
  376.         }
  377.        
  378.         if ((!interbuffer) || (rc != 0)) {
  379.             set_attrs(&conn->screenbuffer.attrs);
  380.             clrscr();
  381.             attrs = &conn->screenbuffer.attrs;
  382.            
  383.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  384.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  385.                     field = get_field_at(&conn->screenbuffer, i, j);
  386.                     if (!attrs_same(*attrs, field->attrs))
  387.                         set_attrs(&field->attrs);
  388.                     attrs = &field->attrs;
  389.                     if ((field->character == ' ') &&
  390.                         (attrs_same(field->attrs, conn->screenbuffer.attrs)))
  391.                         continue;
  392.                    
  393.                     fb_putchar(field->character, j, i);
  394.                 }
  395.         }
  396.        
  397.         curs_goto(conn->screenbuffer.position_y,
  398.             conn->screenbuffer.position_x);
  399.         curs_visibility(conn->screenbuffer.is_cursor_visible);
  400.        
  401.         async_serialize_end();
  402.     }
  403. }
  404.  
  405. /** Handler for keyboard */
  406. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  407. {
  408.     ipc_callid_t callid;
  409.     ipc_call_t call;
  410.     int retval;
  411.     kbd_event_t ev;
  412.     connection_t *conn;
  413.     int newcon;
  414.    
  415.     /* Ignore parameters, the connection is alread opened */
  416.     while (true) {
  417.         callid = async_get_call(&call);
  418.         switch (IPC_GET_METHOD(call)) {
  419.         case IPC_M_PHONE_HUNGUP:
  420.             /* TODO: Handle hangup */
  421.             return;
  422.         case KBD_MS_LEFT:
  423.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  424.             if (newcon != -1)
  425.                 change_console(newcon);
  426.             retval = 0;
  427.             break;
  428.         case KBD_MS_MOVE:
  429.             gcons_mouse_move(IPC_GET_ARG1(call),
  430.                 IPC_GET_ARG2(call));
  431.             retval = 0;
  432.             break;
  433.         case KBD_EVENT:
  434.             /* Got event from keyboard driver. */
  435.             retval = 0;
  436.             ev.type = IPC_GET_ARG1(call);
  437.             ev.key = IPC_GET_ARG2(call);
  438.             ev.mods = IPC_GET_ARG3(call);
  439.             ev.c = IPC_GET_ARG4(call);
  440.            
  441.             /* Switch to another virtual console */
  442.             conn = &connections[active_console];
  443.            
  444.             if ((ev.key >= KC_F1) && (ev.key < KC_F1 +
  445.                 CONSOLE_COUNT) && ((ev.mods & KM_CTRL) == 0)) {
  446.                 if (ev.key == KC_F12)
  447.                     change_console(KERNEL_CONSOLE);
  448.                 else
  449.                     change_console(ev.key - KC_F1);
  450.                 break;
  451.             }
  452.            
  453.             /* If client is awaiting key, send it */
  454.             if (conn->keyrequest_counter > 0) {
  455.                 conn->keyrequest_counter--;
  456.                 ipc_answer_4(fifo_pop(conn->keyrequests), EOK,
  457.                     ev.type, ev.key, ev.mods, ev.c);
  458.                 break;
  459.             }
  460.            
  461.             keybuffer_push(&conn->keybuffer, &ev);
  462.             retval = 0;
  463.            
  464.             break;
  465.         default:
  466.             retval = ENOENT;
  467.         }
  468.         ipc_answer_0(callid, retval);
  469.     }
  470. }
  471.  
  472. /** Handle CONSOLE_WRITE call. */
  473. static void cons_write(int consnum, ipc_callid_t rid, ipc_call_t *request)
  474. {
  475.     ipc_callid_t callid;
  476.     size_t size;
  477.     wchar_t ch;
  478.     size_t off;
  479.    
  480.     if (!ipc_data_write_receive(&callid, &size)) {
  481.         ipc_answer_0(callid, EINVAL);
  482.         ipc_answer_0(rid, EINVAL);
  483.         return;
  484.     }
  485.    
  486.     if (size > CWRITE_BUF_SIZE)
  487.         size = CWRITE_BUF_SIZE;
  488.    
  489.     (void) ipc_data_write_finalize(callid, cwrite_buf, size);
  490.    
  491.     async_serialize_start();
  492.    
  493.     off = 0;
  494.     while (off < size) {
  495.         ch = str_decode(cwrite_buf, &off, size);
  496.         write_char(consnum, ch);
  497.     }
  498.    
  499.     async_serialize_end();
  500.    
  501.     gcons_notify_char(consnum);
  502.     ipc_answer_1(rid, EOK, size);
  503. }
  504.  
  505. /** Default thread for new connections */
  506. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  507. {
  508.     ipc_callid_t callid;
  509.     ipc_call_t call;
  510.     int consnum;
  511.     ipcarg_t arg1, arg2, arg3, arg4;
  512.     connection_t *conn;
  513.     screenbuffer_t *scr;
  514.    
  515.     if ((consnum = find_free_connection()) == -1) {
  516.         ipc_answer_0(iid, ELIMIT);
  517.         return;
  518.     }
  519.     conn = &connections[consnum];
  520.     conn->used = 1;
  521.    
  522.     async_serialize_start();
  523.     gcons_notify_connect(consnum);
  524.     conn->client_phone = IPC_GET_ARG5(*icall);
  525.     screenbuffer_clear(&conn->screenbuffer);
  526.     if (consnum == active_console)
  527.         clrscr();
  528.    
  529.     /* Accept the connection */
  530.     ipc_answer_0(iid, EOK);
  531.    
  532.     while (true) {
  533.         async_serialize_end();
  534.         callid = async_get_call(&call);
  535.         async_serialize_start();
  536.        
  537.         arg1 = 0;
  538.         arg2 = 0;
  539.         arg3 = 0;
  540.         arg4 = 0;
  541.        
  542.         switch (IPC_GET_METHOD(call)) {
  543.         case IPC_M_PHONE_HUNGUP:
  544.             gcons_notify_disconnect(consnum);
  545.            
  546.             /* Answer all pending requests */
  547.             while (conn->keyrequest_counter > 0) {
  548.                 conn->keyrequest_counter--;
  549.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  550.                     ENOENT);
  551.                 break;
  552.             }
  553.             conn->used = 0;
  554.             return;
  555.         case CONSOLE_PUTCHAR:
  556.             write_char(consnum, IPC_GET_ARG1(call));
  557.             gcons_notify_char(consnum);
  558.             break;
  559.         case CONSOLE_WRITE:
  560.             async_serialize_end();
  561.             cons_write(consnum, callid, &call);
  562.             async_serialize_start();
  563.             continue;
  564.         case CONSOLE_CLEAR:
  565.             /* Send message to fb */
  566.             if (consnum == active_console) {
  567.                 async_msg_0(fb_info.phone, FB_CLEAR);
  568.             }
  569.            
  570.             screenbuffer_clear(&conn->screenbuffer);
  571.            
  572.             break;
  573.         case CONSOLE_GOTO:
  574.             screenbuffer_goto(&conn->screenbuffer,
  575.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  576.             if (consnum == active_console)
  577.                 curs_goto(IPC_GET_ARG1(call),
  578.                     IPC_GET_ARG2(call));
  579.             break;
  580.         case CONSOLE_GETSIZE:
  581.             arg1 = fb_info.rows;
  582.             arg2 = fb_info.cols;
  583.             break;
  584.         case CONSOLE_FLUSH:
  585.             fb_pending_flush();
  586.             if (consnum == active_console) {
  587.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  588.                
  589.                 scr = &(connections[consnum].screenbuffer);
  590.                 curs_goto(scr->position_y, scr->position_x);
  591.             }
  592.             break;
  593.         case CONSOLE_SET_STYLE:
  594.             fb_pending_flush();
  595.             arg1 = IPC_GET_ARG1(call);
  596.             screenbuffer_set_style(&conn->screenbuffer, arg1);
  597.             if (consnum == active_console)
  598.                 set_style(arg1);
  599.             break;
  600.         case CONSOLE_SET_COLOR:
  601.             fb_pending_flush();
  602.             arg1 = IPC_GET_ARG1(call);
  603.             arg2 = IPC_GET_ARG2(call);
  604.             arg3 = IPC_GET_ARG3(call);
  605.             screenbuffer_set_color(&conn->screenbuffer, arg1,
  606.                 arg2, arg3);
  607.             if (consnum == active_console)
  608.                 set_color(arg1, arg2, arg3);
  609.             break;
  610.         case CONSOLE_SET_RGB_COLOR:
  611.             fb_pending_flush();
  612.             arg1 = IPC_GET_ARG1(call);
  613.             arg2 = IPC_GET_ARG2(call);
  614.             screenbuffer_set_rgb_color(&conn->screenbuffer, arg1,
  615.                 arg2);
  616.             if (consnum == active_console)
  617.                 set_rgb_color(arg1, arg2);
  618.             break;
  619.         case CONSOLE_CURSOR_VISIBILITY:
  620.             fb_pending_flush();
  621.             arg1 = IPC_GET_ARG1(call);
  622.             conn->screenbuffer.is_cursor_visible = arg1;
  623.             if (consnum == active_console)
  624.                 curs_visibility(arg1);
  625.             break;
  626.         case CONSOLE_GETKEY:
  627.             if (keybuffer_empty(&conn->keybuffer)) {
  628.                 /* buffer is empty -> store request */
  629.                 if (conn->keyrequest_counter <
  630.                     MAX_KEYREQUESTS_BUFFERED) {
  631.                     fifo_push(conn->keyrequests, callid);
  632.                     conn->keyrequest_counter++;
  633.                 } else {
  634.                     /*
  635.                      * No key available and too many
  636.                      * requests => fail.
  637.                     */
  638.                     ipc_answer_0(callid, ELIMIT);
  639.                 }
  640.                 continue;
  641.             }
  642.             kbd_event_t ev;
  643.             keybuffer_pop(&conn->keybuffer, &ev);
  644.             arg1 = ev.type;
  645.             arg2 = ev.key;
  646.             arg3 = ev.mods;
  647.             arg4 = ev.c;
  648.             break;
  649.         case CONSOLE_KCON_ENABLE:
  650.             change_console(KERNEL_CONSOLE);
  651.             break;
  652.         }
  653.         ipc_answer_4(callid, EOK, arg1, arg2, arg3, arg4);
  654.     }
  655. }
  656.  
  657. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  658. {
  659.     change_console(prev_console);
  660. }
  661.  
  662. int main(int argc, char *argv[])
  663. {
  664.     printf(NAME ": HelenOS Console service\n");
  665.    
  666.     ipcarg_t phonehash;
  667.     size_t ib_size;
  668.     int i;
  669.    
  670.     async_set_client_connection(client_connection);
  671.    
  672.     /* Connect to keyboard driver */
  673.     kbd_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  674.     if (kbd_phone < 0) {
  675.         printf(NAME ": Failed to connect to keyboard service\n");
  676.         return -1;
  677.     }
  678.    
  679.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0) {
  680.         printf(NAME ": Failed to create callback from keyboard service\n");
  681.         return -1;
  682.     }
  683.    
  684.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  685.    
  686.     /* Connect to framebuffer driver */
  687.     fb_info.phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VIDEO, 0, 0);
  688.     if (fb_info.phone < 0) {
  689.         printf(NAME ": Failed to connect to video service\n");
  690.         return -1;
  691.     }
  692.    
  693.     /* Disable kernel output to the console */
  694.     __SYSCALL0(SYS_DEBUG_DISABLE_CONSOLE);
  695.    
  696.     /* Initialize gcons */
  697.     gcons_init(fb_info.phone);
  698.     /* Synchronize, the gcons can have something in queue */
  699.     async_req_0_0(fb_info.phone, FB_FLUSH);
  700.    
  701.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
  702.         &fb_info.cols);
  703.     set_rgb_color(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  704.     clrscr();
  705.    
  706.     /* Init virtual consoles */
  707.     for (i = 0; i < CONSOLE_COUNT; i++) {
  708.         connections[i].used = 0;
  709.         keybuffer_init(&connections[i].keybuffer);
  710.        
  711.         connections[i].keyrequests.head = 0;
  712.         connections[i].keyrequests.tail = 0;
  713.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  714.         connections[i].keyrequest_counter = 0;
  715.        
  716.         if (screenbuffer_init(&connections[i].screenbuffer,
  717.             fb_info.cols, fb_info.rows) == NULL) {
  718.             /* FIXME: handle error */
  719.             return -1;
  720.         }
  721.     }
  722.     connections[KERNEL_CONSOLE].used = 1;
  723.    
  724.     /* Set up shared memory buffer. */
  725.     ib_size = sizeof(keyfield_t) * fb_info.cols * fb_info.rows;
  726.     interbuffer = as_get_mappable_page(ib_size);
  727.    
  728.     fb_pending.cnt = 0;
  729.    
  730.     if (as_area_create(interbuffer, ib_size, AS_AREA_READ |
  731.         AS_AREA_WRITE | AS_AREA_CACHEABLE) != interbuffer) {
  732.         interbuffer = NULL;
  733.     }
  734.    
  735.     if (interbuffer) {
  736.         if (ipc_share_out_start(fb_info.phone, interbuffer,
  737.             AS_AREA_READ) != EOK) {
  738.             as_area_destroy(interbuffer);
  739.             interbuffer = NULL;
  740.         }
  741.     }
  742.    
  743.     curs_goto(0, 0);
  744.     curs_visibility(
  745.         connections[active_console].screenbuffer.is_cursor_visible);
  746.    
  747.     /* Register at NS */
  748.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  749.         return -1;
  750.    
  751.     /* Receive kernel notifications */
  752.     if (event_subscribe(EVENT_KCONSOLE, 0) != EOK)
  753.         printf(NAME ": Error registering kconsole notifications\n");
  754.    
  755.     async_set_interrupt_received(interrupt_received);
  756.    
  757.     // FIXME: avoid connectiong to itself, keep using klog
  758.     // printf(NAME ": Accepting connections\n");
  759.     async_manager();
  760.    
  761.     return 0;
  762. }
  763.  
  764. /** @}
  765.  */
  766.