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