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Annotation of qemu/roms/sgabios/sgabios.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright 2010 Google Inc.
                      3:  *
                      4:  * Licensed under the Apache License, Version 2.0 (the "License");
                      5:  * you may not use this file except in compliance with the License.
                      6:  * You may obtain a copy of the License at
                      7:  *
                      8:  *     http://www.apache.org/licenses/LICENSE-2.0
                      9:  *
                     10:  * Unless required by applicable law or agreed to in writing, software
                     11:  * distributed under the License is distributed on an "AS IS" BASIS,
                     12:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
                     13:  * See the License for the specific language governing permissions and
                     14:  * limitations under the License.
                     15:  */
                     16: 
                     17: /* don't allocate ebda if new value at 0x40e will be less than this */
                     18: #define EBDA_MIN_SEG           0x9800
                     19: #define SGABIOS_EBDA_KB                1
                     20: /* note: no testing has yet been done logging other than 256 bytes */
                     21: #define SGABIOS_EBDA_BYTES     (SGABIOS_EBDA_KB*1024)
                     22: #define SGABIOS_EBDA_DELTA     (SGABIOS_EBDA_BYTES/16)
                     23: #define SGABIOS_EBDA_LOG_START 256
                     24: #define SGABIOS_EBDA_LOG_SIZE  256
                     25: #define SGABIOS_EBDA_POS_START (SGABIOS_EBDA_LOG_START+SGABIOS_EBDA_LOG_SIZE)
                     26: #define SGABIOS_EBDA_POS_LAST  (SGABIOS_EBDA_POS_START+(SGABIOS_EBDA_LOG_SIZE*2)-2)
                     27: 
                     28: /* serial costants that may require modification */
                     29: #define COM_BASE_ADDR           0x3f8
                     30: #define PORT_SPEED             115200
                     31: #define LCR_VALUE              0x13    /* 8n1 */
                     32: 
                     33: /* serial constants below shouldn't require modification */
                     34: #define IER_OFFSET              0x01
                     35: #define FCR_OFFSET              0x02
                     36: #define LCR_OFFSET              0x03
                     37: #define MCR_OFFSET              0x04
                     38: #define LSR_OFFSET              0x05
                     39: #define MSR_OFFSET              0x06
                     40: #define SCR_OFFSET              0x07
                     41: #define LCR_DLAB               0x80
                     42: #define MCR_DTRRTS             0x03
                     43: #define FCR_FIFO_ENABLE                0x01
                     44: #define PORT_DIVISOR           115200
                     45: #define TRANSMIT_READY_BIT      0x20
                     46: #define BIOS_BUILD_VERSION     "$Id: sgabios.S 7 2009-11-13 00:21:26Z [email protected] $"
                     47: 
                     48: #define KBD_HEAD               0x1a
                     49: #define KBD_TAIL               0x1c
                     50: #define KBD_BUF_START          0x1e
                     51: #define KBD_BUF_END            0x3e
                     52: 
                     53: #define VGA_IO_BASE            0x3d4
                     54: #define BDA_SEG                        0x40
                     55: #define BDA_EBDA               0x0e
                     56: #define BDA_MEM_SIZE           0x13
                     57: #define BDA_MODE_NUM           0x49
                     58: #define BDA_COLS               0x4a
                     59: #define BDA_PAGE_SIZE          0x4c
                     60: /* BDA word 40:0c traditionally holds the LPT3 io port address... */
                     61: /* Reuse it for tracking where the serial console cursor was left */
                     62: /* Don't send ansi cursor pos update without text ready to output */
                     63: /* Some operations don't update cursor position, but next int 10h */
                     64: /* call is often one that might update to where cursor already is */
                     65: #define BDA_SERIAL_POS         0x0c
                     66: #define BDA_CURSOR_BUF         0x50
                     67: #define BDA_CURSOR_COL         0x50
                     68: #define BDA_CURSOR_ROW         0x51
                     69: #define BDA_CURSOR_SCAN                0x60
                     70: #define BDA_ACTIVE_PAGE                0x62
                     71: #define BDA_6845_ADDR          0x63
                     72: #define BDA_MODE_SEL           0x65
                     73: #define BDA_COLOR_VAL          0x66
                     74: #define BDA_ROM_OFF            0x67
                     75: #define BDA_ROM_SEG            0x69
                     76: #define BDA_ROWS               0x84

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