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Annotation of qemu/roms/qemu-palcode/console.c, revision 1.1

1.1     ! root        1: /* The SRM console prompt.
        !             2: 
        !             3:    Copyright (C) 2011 Richard Henderson
        !             4: 
        !             5:    This file is part of QEMU PALcode.
        !             6: 
        !             7:    This program is free software; you can redistribute it and/or modify
        !             8:    it under the terms of the GNU General Public License as published by
        !             9:    the Free Software Foundation; either version 2 of the License or
        !            10:    (at your option) any later version.
        !            11: 
        !            12:    This program is distributed in the hope that it will be useful,
        !            13:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the text
        !            15:    of the GNU General Public License for more details.
        !            16: 
        !            17:    You should have received a copy of the GNU General Public License
        !            18:    along with this program; see the file COPYING.  If not see
        !            19:    <http://www.gnu.org/licenses/>.  */
        !            20: 
        !            21: #include "protos.h"
        !            22: #include "console.h"
        !            23: #include "vgatables.h"
        !            24: 
        !            25: 
        !            26: static void
        !            27: output_crnl(void)
        !            28: {
        !            29:   crb_puts(0, "\r\n", 2);
        !            30: }
        !            31: 
        !            32: static void
        !            33: output_bell(void)
        !            34: {
        !            35:   crb_puts(0, "\a", 1);
        !            36: }
        !            37: 
        !            38: static void
        !            39: backspace_and_erase(void)
        !            40: {
        !            41:   crb_puts(0, "\b \b", 3);
        !            42: }
        !            43: 
        !            44: static unsigned long
        !            45: getline(char *buf, unsigned long bufsize)
        !            46: {
        !            47:   unsigned long len = 0;
        !            48:   long c;
        !            49: 
        !            50:   while (1)
        !            51:     {
        !            52:       c = crb_getc(0);
        !            53:       if (c < 0)
        !            54:        continue;
        !            55:       switch ((int)c)
        !            56:        {
        !            57:        case '\r':
        !            58:        case '\n':
        !            59:          output_crnl();
        !            60:          buf[len] = 0;
        !            61:          return len;
        !            62: 
        !            63:         case '\b':
        !            64:        case 0x7f: /* Delete */
        !            65:           if (len > 0)
        !            66:            {
        !            67:              backspace_and_erase();
        !            68:               len--;
        !            69:             }
        !            70:          else
        !            71:            output_bell();
        !            72:           break;
        !            73: 
        !            74:         default:
        !            75:          if (len + 1 < bufsize)
        !            76:            {
        !            77:              buf[len] = c;
        !            78:               crb_puts(0, buf+len, 1);
        !            79:              len++;
        !            80:            }
        !            81:          else
        !            82:            output_bell();
        !            83:          break;
        !            84:         }
        !            85:     }
        !            86: }
        !            87: 
        !            88: static inline void set_console_alarm(void)
        !            89: {
        !            90:   /* Just set a new timeout for 10ms = 10M ns.  */
        !            91:   set_alarm_rel(10 * 1000 * 1000);
        !            92: }
        !            93: 
        !            94: void
        !            95: do_entInt(unsigned long type, unsigned long vector)
        !            96: {
        !            97:   switch (type)
        !            98:     {
        !            99:     case 0:
        !           100:       /* ??? SMP interrupt.  We're going to need this for starting up
        !           101:          secondary cpus.  */
        !           102:       break;
        !           103:     case 1:
        !           104:       /* Timer interrupt.  */
        !           105:       set_console_alarm();
        !           106:       break;
        !           107:     case 2:
        !           108:       /* ??? Device interrupt.  We're going to need this for virtio disk
        !           109:          operations at minimum.  */
        !           110:       break;
        !           111:     }
        !           112: }
        !           113: 
        !           114: void
        !           115: do_console(void)
        !           116: {
        !           117:   char line[256];
        !           118:   unsigned long len;
        !           119: 
        !           120:   wrkgp();
        !           121:   wrent(entInt, 0);
        !           122:   set_console_alarm();
        !           123:   swpipl(0);
        !           124: 
        !           125:   if (have_vga)
        !           126:   {
        !           127:     unsigned short *vga, attr;
        !           128:     vga = pci_mem_base + SEG_CTEXT *16;
        !           129:     attr = 0x2000;
        !           130:     vga[0] = 'H' + attr;
        !           131:     vga[1] = 'e' + attr;
        !           132:     vga[2] = 'l' + attr;
        !           133:     vga[3] = 'l' + attr;
        !           134:     vga[4] = 'o' + attr;
        !           135:   }
        !           136: 
        !           137:   while (1)
        !           138:     {
        !           139:       crb_puts(0, ">>> ", 4);
        !           140:       len = getline(line, sizeof(line));
        !           141:       crb_puts(0, "got: ", 5);
        !           142:       crb_puts(0, line, len);
        !           143:       output_crnl();
        !           144:     }
        !           145: }

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