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001 /* Copyright (C) 2004 David Decotigny 001 /* Copyright (C) 2004 David Decotigny 002 002 003 This program is free software; you can redi 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 006 of the License, or (at your option) any later version. 007 007 008 This program is distributed in the hope tha 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 011 GNU General Public License for more details. 012 012 013 You should have received a copy of the GNU 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 016 USA. 017 */ 017 */ 018 #include <sos/klibc.h> 018 #include <sos/klibc.h> 019 #include <hwcore/ioports.h> 019 #include <hwcore/ioports.h> 020 020 021 #include "x86_videomem.h" 021 #include "x86_videomem.h" 022 022 023 /* The text video memory starts at address 0xB 023 /* The text video memory starts at address 0xB8000. Odd bytes are the 024 ASCII value of the character, even bytes ar 024 ASCII value of the character, even bytes are attribute for the 025 preceding character. */ 025 preceding character. */ 026 #define VIDEO 0xb8000 026 #define VIDEO 0xb8000 027 027 028 028 029 /* Console screen size */ 029 /* Console screen size */ 030 #define LINES 25 030 #define LINES 25 031 #define COLUMNS 80 031 #define COLUMNS 80 032 032 033 033 034 /** The structure of a character element in th 034 /** The structure of a character element in the video memory. @see 035 http://webster.cs.ucr.edu/AoA DOS edition 035 http://webster.cs.ucr.edu/AoA DOS edition chapter 23 */ 036 typedef struct { 036 typedef struct { 037 unsigned char character; 037 unsigned char character; 038 unsigned char attribute; 038 unsigned char attribute; 039 } __attribute__ ((packed)) x86_video_mem[LINES 039 } __attribute__ ((packed)) x86_video_mem[LINES*COLUMNS]; 040 040 041 041 042 042 043 /** The base pointer for the video memory */ 043 /** The base pointer for the video memory */ 044 static volatile x86_video_mem *video = (volati 044 static volatile x86_video_mem *video = (volatile x86_video_mem*)VIDEO; 045 045 046 sos_ret_t sos_x86_videomem_setup(void) 046 sos_ret_t sos_x86_videomem_setup(void) 047 { 047 { 048 /* 048 /* 049 * Hide cursor. @see Ralf Brown's interrupt 049 * Hide cursor. @see Ralf Brown's interrupt (and port) list 050 * http://www-2.cs.cmu.edu/~ralf/files.html 050 * http://www-2.cs.cmu.edu/~ralf/files.html 051 */ 051 */ 052 #define CRT_REG_INDEX 0x3d4 052 #define CRT_REG_INDEX 0x3d4 053 #define CRT_REG_DATA 0x3d5 053 #define CRT_REG_DATA 0x3d5 054 054 055 /* CRT index port => ask for access to regis 055 /* CRT index port => ask for access to register 0xa ("cursor 056 start") */ 056 start") */ 057 outb(0x0a, CRT_REG_INDEX); 057 outb(0x0a, CRT_REG_INDEX); 058 058 059 /* (RBIL Tables 708 & 654) CRT Register 0xa 059 /* (RBIL Tables 708 & 654) CRT Register 0xa => bit 5 = cursor OFF */ 060 outb(1 << 5, CRT_REG_DATA); 060 outb(1 << 5, CRT_REG_DATA); 061 061 062 return SOS_OK; 062 return SOS_OK; 063 } 063 } 064 064 065 065 066 sos_ret_t sos_x86_videomem_cls(unsigned char a 066 sos_ret_t sos_x86_videomem_cls(unsigned char attribute) 067 { 067 { 068 /* Clears the screen */ 068 /* Clears the screen */ 069 int i; 069 int i; 070 for(i = 0 ; i < LINES*COLUMNS ; i++) 070 for(i = 0 ; i < LINES*COLUMNS ; i++) 071 { 071 { 072 (*video)[i].character = 0; 072 (*video)[i].character = 0; 073 (*video)[i].attribute = attribute; 073 (*video)[i].attribute = attribute; 074 } 074 } 075 075 076 return SOS_OK; 076 return SOS_OK; 077 } 077 } 078 078 079 079 080 sos_ret_t sos_x86_videomem_putstring(unsigned 080 sos_ret_t sos_x86_videomem_putstring(unsigned char row, unsigned char col, 081 unsigned 081 unsigned char attribute, 082 const cha 082 const char *str) 083 { 083 { 084 unsigned video_offs = row*COLUMNS + col; 084 unsigned video_offs = row*COLUMNS + col; 085 085 086 if (video_offs >= LINES*COLUMNS) 086 if (video_offs >= LINES*COLUMNS) 087 return -SOS_EINVAL; 087 return -SOS_EINVAL; 088 088 089 for ( ; str && *str && (video_offs < LINES*C 089 for ( ; str && *str && (video_offs < LINES*COLUMNS) ; str++, video_offs++) 090 { 090 { 091 (*video)[video_offs].character = (unsign 091 (*video)[video_offs].character = (unsigned char)*str; 092 (*video)[video_offs].attribute = attribu 092 (*video)[video_offs].attribute = attribute; 093 } 093 } 094 094 095 return SOS_OK; 095 return SOS_OK; 096 } 096 } 097 097 098 098 099 sos_ret_t sos_x86_videomem_putchar(unsigned ch 099 sos_ret_t sos_x86_videomem_putchar(unsigned char row, unsigned char col, 100 unsigned ch 100 unsigned char attribute, 101 unsigned ch 101 unsigned char c) 102 { 102 { 103 unsigned video_offs = row*COLUMNS + col; 103 unsigned video_offs = row*COLUMNS + col; 104 104 105 if (video_offs >= LINES*COLUMNS) 105 if (video_offs >= LINES*COLUMNS) 106 return -SOS_EINVAL; 106 return -SOS_EINVAL; 107 107 108 (*video)[video_offs].character = c; 108 (*video)[video_offs].character = c; 109 (*video)[video_offs].attribute = attribute; 109 (*video)[video_offs].attribute = attribute; 110 110 111 return SOS_OK; 111 return SOS_OK; 112 } 112 } 113 113 114 114 115 sos_ret_t sos_x86_videomem_printf(unsigned cha 115 sos_ret_t sos_x86_videomem_printf(unsigned char row, unsigned char col, 116 unsigned cha 116 unsigned char attribute, 117 const char * 117 const char *format, /* args */...) 118 { 118 { 119 char buff[256]; 119 char buff[256]; 120 va_list ap; 120 va_list ap; 121 121 122 va_start(ap, format); 122 va_start(ap, format); 123 vsnprintf(buff, sizeof(buff), format, ap); 123 vsnprintf(buff, sizeof(buff), format, ap); 124 va_end(ap); 124 va_end(ap); 125 125 126 return sos_x86_videomem_putstring(row, col, 126 return sos_x86_videomem_putstring(row, col, attribute, buff); 127 } 127 }
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