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/*
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* QEMU VGA Emulator. An S3 86c968 is emulated
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <getopt.h> |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <sys/mman.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <time.h> |
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#include <sys/time.h> |
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#include <malloc.h> |
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#include <termios.h> |
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#include <sys/poll.h> |
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#include <errno.h> |
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#include <sys/wait.h> |
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#include <netinet/in.h> |
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|
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#include "cpu-i386.h" |
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#include "exec.h" |
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|
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#include "vl.h" |
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|
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#define NO_THUNK_TYPE_SIZE
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#include "thunk.h" |
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|
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//#define DEBUG_VGA
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//#define DEBUG_VGA_MEM
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|
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#define MSR_COLOR_EMULATION 0x01 |
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#define MSR_PAGE_SELECT 0x20 |
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|
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#define ST01_V_RETRACE 0x08 |
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#define ST01_DISP_ENABLE 0x01 |
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|
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typedef struct VGAState { |
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uint8_t *vram_ptr; |
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unsigned long vram_offset; |
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unsigned int vram_size; |
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uint32_t latch; |
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uint8_t sr_index; |
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uint8_t sr[8];
|
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uint8_t gr_index; |
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uint8_t gr[16];
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uint8_t ar_index; |
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uint8_t ar[21];
|
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int ar_flip_flop;
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uint8_t cr_index; |
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uint8_t cr[256]; /* CRT registers */ |
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uint8_t msr; /* Misc Output Register */
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uint8_t fcr; /* Feature Control Register */
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uint8_t st00; /* status 0 */
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uint8_t st01; /* status 1 */
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uint8_t dac_state; |
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uint8_t dac_sub_index; |
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uint8_t dac_read_index; |
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uint8_t dac_write_index; |
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uint8_t dac_cache[3]; /* used when writing */ |
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uint8_t palette[768];
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|
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/* display refresh support */
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DisplayState *ds; |
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uint32_t font_offsets[2];
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int graphic_mode;
|
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uint8_t shift_control; |
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uint8_t double_scan; |
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uint32_t line_offset; |
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uint32_t line_compare; |
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uint32_t start_addr; |
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uint8_t last_cw, last_ch; |
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uint32_t last_width, last_height; |
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uint8_t cursor_start, cursor_end; |
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uint32_t cursor_offset; |
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unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned b); |
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/* tell for each page if it has been updated since the last time */
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uint8_t vram_updated[VGA_RAM_SIZE / 4096];
|
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uint32_t last_palette[256];
|
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#define CH_ATTR_SIZE (160 * 100) |
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uint32_t last_ch_attr[CH_ATTR_SIZE]; /* XXX: make it dynamic */
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} VGAState; |
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|
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/* force some bits to zero */
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static const uint8_t sr_mask[8] = { |
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(uint8_t)~0xfc,
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(uint8_t)~0xc2,
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(uint8_t)~0xf0,
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(uint8_t)~0xc0,
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(uint8_t)~0xf1,
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(uint8_t)~0xff,
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(uint8_t)~0xff,
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(uint8_t)~0x00,
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}; |
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|
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static const uint8_t gr_mask[16] = { |
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(uint8_t)~0xf0, /* 0x00 */ |
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(uint8_t)~0xf0, /* 0x01 */ |
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(uint8_t)~0xf0, /* 0x02 */ |
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(uint8_t)~0xe0, /* 0x03 */ |
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(uint8_t)~0xfc, /* 0x04 */ |
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(uint8_t)~0x84, /* 0x05 */ |
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(uint8_t)~0xf0, /* 0x06 */ |
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(uint8_t)~0xf0, /* 0x07 */ |
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(uint8_t)~0x00, /* 0x08 */ |
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(uint8_t)~0xff, /* 0x09 */ |
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(uint8_t)~0xff, /* 0x0a */ |
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(uint8_t)~0xff, /* 0x0b */ |
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(uint8_t)~0xff, /* 0x0c */ |
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(uint8_t)~0xff, /* 0x0d */ |
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(uint8_t)~0xff, /* 0x0e */ |
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(uint8_t)~0xff, /* 0x0f */ |
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}; |
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|
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#define cbswap_32(__x) \
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((uint32_t)( \ |
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(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ |
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(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ |
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(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ |
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(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )) |
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#ifdef WORD_BIGENDIAN
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#define PAT(x) cbswap_32(x)
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#else
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#define PAT(x) (x)
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#endif
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|
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static const uint32_t mask16[16] = { |
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PAT(0x00000000),
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PAT(0x000000ff),
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PAT(0x0000ff00),
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PAT(0x0000ffff),
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PAT(0x00ff0000),
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PAT(0x00ff00ff),
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PAT(0x00ffff00),
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PAT(0x00ffffff),
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PAT(0xff000000),
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PAT(0xff0000ff),
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PAT(0xff00ff00),
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PAT(0xff00ffff),
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PAT(0xffff0000),
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PAT(0xffff00ff),
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PAT(0xffffff00),
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PAT(0xffffffff),
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}; |
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#undef PAT
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#ifdef WORD_BIGENDIAN
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#define PAT(x) (x)
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#else
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#define PAT(x) cbswap_32(x)
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#endif
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static const uint32_t dmask16[16] = { |
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PAT(0x00000000),
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PAT(0x000000ff),
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PAT(0x0000ff00),
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PAT(0x0000ffff),
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PAT(0x00ff0000),
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PAT(0x00ff00ff),
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PAT(0x00ffff00),
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PAT(0x00ffffff),
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PAT(0xff000000),
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PAT(0xff0000ff),
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PAT(0xff00ff00),
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PAT(0xff00ffff),
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PAT(0xffff0000),
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PAT(0xffff00ff),
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PAT(0xffffff00),
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PAT(0xffffffff),
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}; |
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|
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static const uint32_t dmask4[4] = { |
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PAT(0x00000000),
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PAT(0x0000ffff),
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PAT(0xffff0000),
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PAT(0xffffffff),
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}; |
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|
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static uint32_t expand4[256]; |
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static uint16_t expand2[256]; |
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static uint8_t expand4to8[16]; |
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|
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VGAState vga_state; |
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int vga_io_memory;
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|
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static uint32_t vga_ioport_read(CPUX86State *env, uint32_t addr)
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{
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VGAState *s = &vga_state; |
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int val, index;
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|
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/* check port range access depending on color/monochrome mode */
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if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) || |
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(addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION))) { |
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val = 0xff;
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} else {
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switch(addr) {
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case 0x3c0: |
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if (s->ar_flip_flop == 0) { |
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val = s->ar_index; |
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} else {
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val = 0;
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} |
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break;
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case 0x3c1: |
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index = s->ar_index & 0x1f;
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if (index < 21) |
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val = s->ar[index]; |
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else
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val = 0;
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break;
|
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case 0x3c2: |
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val = s->st00; |
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break;
|
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case 0x3c4: |
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val = s->sr_index; |
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break;
|
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case 0x3c5: |
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val = s->sr[s->sr_index]; |
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break;
|
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case 0x3c7: |
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val = s->dac_state; |
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break;
|
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case 0x3c9: |
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val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
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if (++s->dac_sub_index == 3) { |
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s->dac_sub_index = 0;
|
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s->dac_read_index++; |
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} |
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break;
|
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case 0x3ca: |
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val = s->fcr; |
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break;
|
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case 0x3cc: |
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val = s->msr; |
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break;
|
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case 0x3ce: |
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val = s->gr_index; |
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break;
|
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case 0x3cf: |
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val = s->gr[s->gr_index]; |
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break;
|
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case 0x3b4: |
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case 0x3d4: |
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val = s->cr_index; |
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break;
|
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case 0x3b5: |
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case 0x3d5: |
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val = s->cr[s->cr_index]; |
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break;
|
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case 0x3ba: |
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case 0x3da: |
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/* just toggle to fool polling */
|
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s->st01 ^= ST01_V_RETRACE | ST01_DISP_ENABLE; |
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val = s->st01; |
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s->ar_flip_flop = 0;
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break;
|
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default:
|
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val = 0x00;
|
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break;
|
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} |
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} |
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#ifdef DEBUG_VGA
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printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
|
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#endif
|
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return val;
|
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} |
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|
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static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) |
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{
|
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VGAState *s = &vga_state; |
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int index, v;
|
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|
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/* check port range access depending on color/monochrome mode */
|
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if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) || |
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(addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION))) |
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return;
|
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|
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#ifdef DEBUG_VGA
|
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printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
|
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#endif
|
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|
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switch(addr) {
|
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case 0x3c0: |
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if (s->ar_flip_flop == 0) { |
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val &= 0x3f;
|
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s->ar_index = val; |
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} else {
|
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index = s->ar_index & 0x1f;
|
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switch(index) {
|
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case 0x00 ... 0x0f: |
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s->ar[index] = val & 0x3f;
|
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break;
|
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case 0x10: |
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s->ar[index] = val & ~0x10;
|
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break;
|
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case 0x11: |
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s->ar[index] = val; |
| 322 |
break;
|
| 323 |
case 0x12: |
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s->ar[index] = val & ~0xc0;
|
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break;
|
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case 0x13: |
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s->ar[index] = val & ~0xf0;
|
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break;
|
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case 0x14: |
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s->ar[index] = val & ~0xf0;
|
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break;
|
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default:
|
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break;
|
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} |
| 335 |
} |
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s->ar_flip_flop ^= 1;
|
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break;
|
| 338 |
case 0x3c2: |
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s->msr = val & ~0x10;
|
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break;
|
| 341 |
case 0x3c4: |
| 342 |
s->sr_index = val & 7;
|
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break;
|
| 344 |
case 0x3c5: |
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s->sr[s->sr_index] = val & sr_mask[s->sr_index]; |
| 346 |
break;
|
| 347 |
case 0x3c7: |
| 348 |
s->dac_read_index = val; |
| 349 |
s->dac_sub_index = 0;
|
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s->dac_state = 3;
|
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break;
|
| 352 |
case 0x3c8: |
| 353 |
s->dac_write_index = val; |
| 354 |
s->dac_sub_index = 0;
|
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s->dac_state = 0;
|
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break;
|
| 357 |
case 0x3c9: |
| 358 |
s->dac_cache[s->dac_sub_index] = val; |
| 359 |
if (++s->dac_sub_index == 3) { |
| 360 |
memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); |
| 361 |
s->dac_sub_index = 0;
|
| 362 |
s->dac_write_index++; |
| 363 |
} |
| 364 |
break;
|
| 365 |
case 0x3ce: |
| 366 |
s->gr_index = val & 0x0f;
|
| 367 |
break;
|
| 368 |
case 0x3cf: |
| 369 |
s->gr[s->gr_index] = val & gr_mask[s->gr_index]; |
| 370 |
break;
|
| 371 |
case 0x3b4: |
| 372 |
case 0x3d4: |
| 373 |
s->cr_index = val; |
| 374 |
break;
|
| 375 |
case 0x3b5: |
| 376 |
case 0x3d5: |
| 377 |
/* handle CR0-7 protection */
|
| 378 |
if ((s->cr[11] & 0x80) && s->cr_index <= 7) { |
| 379 |
/* can always write bit 4 of CR7 */
|
| 380 |
if (s->cr_index == 7) |
| 381 |
s->cr[7] = (s->cr[7] & ~0x10) | (val & 0x10); |
| 382 |
return;
|
| 383 |
} |
| 384 |
switch(s->cr_index) {
|
| 385 |
case 0x01: /* horizontal display end */ |
| 386 |
case 0x07: |
| 387 |
case 0x09: |
| 388 |
case 0x0c: |
| 389 |
case 0x0d: |
| 390 |
case 0x12: /* veritcal display end */ |
| 391 |
s->cr[s->cr_index] = val; |
| 392 |
break;
|
| 393 |
|
| 394 |
/* S3 registers */
|
| 395 |
case 0x2d: |
| 396 |
case 0x2e: |
| 397 |
case 0x2f: |
| 398 |
case 0x30: |
| 399 |
/* chip ID, cannot write */
|
| 400 |
break;
|
| 401 |
case 0x31: |
| 402 |
/* update start address */
|
| 403 |
s->cr[s->cr_index] = val; |
| 404 |
v = (val >> 4) & 3; |
| 405 |
s->cr[0x69] = (s->cr[69] & ~0x03) | v; |
| 406 |
break;
|
| 407 |
case 0x51: |
| 408 |
/* update start address */
|
| 409 |
s->cr[s->cr_index] = val; |
| 410 |
v = val & 3;
|
| 411 |
s->cr[0x69] = (s->cr[69] & ~0x0c) | (v << 2); |
| 412 |
break;
|
| 413 |
default:
|
| 414 |
s->cr[s->cr_index] = val; |
| 415 |
break;
|
| 416 |
} |
| 417 |
break;
|
| 418 |
case 0x3ba: |
| 419 |
case 0x3da: |
| 420 |
s->fcr = val & 0x10;
|
| 421 |
break;
|
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
/* called for accesses between 0xa0000 and 0xc0000 */
|
| 426 |
static uint32_t vga_mem_readb(uint32_t addr)
|
| 427 |
{
|
| 428 |
VGAState *s = &vga_state; |
| 429 |
int memory_map_mode, plane;
|
| 430 |
uint32_t ret; |
| 431 |
|
| 432 |
/* convert to VGA memory offset */
|
| 433 |
memory_map_mode = (s->gr[6] >> 2) & 3; |
| 434 |
switch(memory_map_mode) {
|
| 435 |
case 0: |
| 436 |
addr -= 0xa0000;
|
| 437 |
break;
|
| 438 |
case 1: |
| 439 |
addr -= 0xa0000;
|
| 440 |
if (addr >= 0x10000) |
| 441 |
return 0xff; |
| 442 |
break;
|
| 443 |
case 2: |
| 444 |
addr -= 0xb0000;
|
| 445 |
if (addr >= 0x8000) |
| 446 |
return 0xff; |
| 447 |
break;
|
| 448 |
default:
|
| 449 |
case 3: |
| 450 |
addr -= 0xb8000;
|
| 451 |
break;
|
| 452 |
} |
| 453 |
|
| 454 |
if (s->sr[4] & 0x08) { |
| 455 |
/* chain 4 mode : simplest access */
|
| 456 |
ret = s->vram_ptr[addr]; |
| 457 |
} else if (s->gr[5] & 0x10) { |
| 458 |
/* odd/even mode (aka text mode mapping) */
|
| 459 |
plane = (s->gr[4] & 2) | (addr & 1); |
| 460 |
ret = s->vram_ptr[((addr & ~1) << 1) | plane]; |
| 461 |
} else {
|
| 462 |
/* standard VGA latched access */
|
| 463 |
s->latch = ((uint32_t *)s->vram_ptr)[addr]; |
| 464 |
|
| 465 |
if (!(s->gr[5] & 0x08)) { |
| 466 |
/* read mode 0 */
|
| 467 |
plane = s->gr[4];
|
| 468 |
#ifdef WORD_BIGENDIAN
|
| 469 |
ret = (s->latch >> (24 - (plane * 8))) & 0xff; |
| 470 |
#else
|
| 471 |
ret = (s->latch >> (plane * 8)) & 0xff; |
| 472 |
#endif
|
| 473 |
} else {
|
| 474 |
/* read mode 1 */
|
| 475 |
ret = (s->latch ^ mask16[s->gr[2]]) & mask16[s->gr[7]]; |
| 476 |
ret |= ret >> 16;
|
| 477 |
ret |= ret >> 8;
|
| 478 |
ret = (~ret) & 0xff;
|
| 479 |
} |
| 480 |
} |
| 481 |
return ret;
|
| 482 |
} |
| 483 |
|
| 484 |
static uint32_t vga_mem_readw(uint32_t addr)
|
| 485 |
{
|
| 486 |
uint32_t v; |
| 487 |
v = vga_mem_readb(addr); |
| 488 |
v |= vga_mem_readb(addr + 1) << 8; |
| 489 |
return v;
|
| 490 |
} |
| 491 |
|
| 492 |
static uint32_t vga_mem_readl(uint32_t addr)
|
| 493 |
{
|
| 494 |
uint32_t v; |
| 495 |
v = vga_mem_readb(addr); |
| 496 |
v |= vga_mem_readb(addr + 1) << 8; |
| 497 |
v |= vga_mem_readb(addr + 2) << 16; |
| 498 |
v |= vga_mem_readb(addr + 3) << 24; |
| 499 |
return v;
|
| 500 |
} |
| 501 |
|
| 502 |
|
| 503 |
/* called for accesses between 0xa0000 and 0xc0000 */
|
| 504 |
void vga_mem_writeb(uint32_t addr, uint32_t val)
|
| 505 |
{
|
| 506 |
VGAState *s = &vga_state; |
| 507 |
int memory_map_mode, plane, write_mode, b, func_select;
|
| 508 |
uint32_t write_mask, bit_mask, set_mask; |
| 509 |
|
| 510 |
#ifdef DEBUG_VGA_MEM
|
| 511 |
printf("vga: [0x%x] = 0x%02x\n", addr, val);
|
| 512 |
#endif
|
| 513 |
/* convert to VGA memory offset */
|
| 514 |
memory_map_mode = (s->gr[6] >> 2) & 3; |
| 515 |
switch(memory_map_mode) {
|
| 516 |
case 0: |
| 517 |
addr -= 0xa0000;
|
| 518 |
break;
|
| 519 |
case 1: |
| 520 |
addr -= 0xa0000;
|
| 521 |
if (addr >= 0x10000) |
| 522 |
return;
|
| 523 |
break;
|
| 524 |
case 2: |
| 525 |
addr -= 0xb0000;
|
| 526 |
if (addr >= 0x8000) |
| 527 |
return;
|
| 528 |
break;
|
| 529 |
default:
|
| 530 |
case 3: |
| 531 |
addr -= 0xb8000;
|
| 532 |
break;
|
| 533 |
} |
| 534 |
|
| 535 |
if (s->sr[4] & 0x08) { |
| 536 |
/* chain 4 mode : simplest access */
|
| 537 |
plane = addr & 3;
|
| 538 |
if (s->sr[2] & (1 << plane)) { |
| 539 |
s->vram_ptr[addr] = val; |
| 540 |
#ifdef DEBUG_VGA_MEM
|
| 541 |
printf("vga: chain4: [0x%x]\n", addr);
|
| 542 |
#endif
|
| 543 |
s->vram_updated[addr >> 12] = 1; |
| 544 |
} |
| 545 |
} else if (s->gr[5] & 0x10) { |
| 546 |
/* odd/even mode (aka text mode mapping) */
|
| 547 |
plane = (s->gr[4] & 2) | (addr & 1); |
| 548 |
if (s->sr[2] & (1 << plane)) { |
| 549 |
addr = ((addr & ~1) << 1) | plane; |
| 550 |
s->vram_ptr[addr] = val; |
| 551 |
#ifdef DEBUG_VGA_MEM
|
| 552 |
printf("vga: odd/even: [0x%x]\n", addr);
|
| 553 |
#endif
|
| 554 |
s->vram_updated[addr >> 12] = 1; |
| 555 |
} |
| 556 |
} else {
|
| 557 |
/* standard VGA latched access */
|
| 558 |
write_mode = s->gr[5] & 3; |
| 559 |
switch(write_mode) {
|
| 560 |
default:
|
| 561 |
case 0: |
| 562 |
/* rotate */
|
| 563 |
b = s->gr[3] & 7; |
| 564 |
val = ((val >> b) | (val << (8 - b))) & 0xff; |
| 565 |
val |= val << 8;
|
| 566 |
val |= val << 16;
|
| 567 |
|
| 568 |
/* apply set/reset mask */
|
| 569 |
set_mask = mask16[s->gr[1]];
|
| 570 |
val = (val & ~set_mask) | (mask16[s->gr[0]] & set_mask);
|
| 571 |
bit_mask = s->gr[8];
|
| 572 |
break;
|
| 573 |
case 1: |
| 574 |
val = s->latch; |
| 575 |
goto do_write;
|
| 576 |
case 2: |
| 577 |
val = mask16[val & 0x0f];
|
| 578 |
bit_mask = s->gr[8];
|
| 579 |
break;
|
| 580 |
case 3: |
| 581 |
/* rotate */
|
| 582 |
b = s->gr[3] & 7; |
| 583 |
val = ((val >> b) | (val << (8 - b)));
|
| 584 |
|
| 585 |
bit_mask = s->gr[8] & val;
|
| 586 |
val = mask16[s->gr[0]];
|
| 587 |
break;
|
| 588 |
} |
| 589 |
|
| 590 |
/* apply logical operation */
|
| 591 |
func_select = s->gr[3] >> 3; |
| 592 |
switch(func_select) {
|
| 593 |
case 0: |
| 594 |
default:
|
| 595 |
/* nothing to do */
|
| 596 |
break;
|
| 597 |
case 1: |
| 598 |
/* and */
|
| 599 |
val &= s->latch; |
| 600 |
break;
|
| 601 |
case 2: |
| 602 |
/* or */
|
| 603 |
val |= s->latch; |
| 604 |
break;
|
| 605 |
case 3: |
| 606 |
/* xor */
|
| 607 |
val ^= s->latch; |
| 608 |
break;
|
| 609 |
} |
| 610 |
|
| 611 |
/* apply bit mask */
|
| 612 |
bit_mask |= bit_mask << 8;
|
| 613 |
bit_mask |= bit_mask << 16;
|
| 614 |
val = (val & bit_mask) | (s->latch & ~bit_mask); |
| 615 |
|
| 616 |
do_write:
|
| 617 |
/* mask data according to sr[2] */
|
| 618 |
write_mask = mask16[s->sr[2]];
|
| 619 |
((uint32_t *)s->vram_ptr)[addr] = |
| 620 |
(((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | |
| 621 |
(val & write_mask); |
| 622 |
#ifdef DEBUG_VGA_MEM
|
| 623 |
printf("vga: latch: [0x%x] mask=0x%08x val=0x%08x\n",
|
| 624 |
addr * 4, write_mask, val);
|
| 625 |
#endif
|
| 626 |
s->vram_updated[addr >> 10] = 1; |
| 627 |
} |
| 628 |
} |
| 629 |
|
| 630 |
void vga_mem_writew(uint32_t addr, uint32_t val)
|
| 631 |
{
|
| 632 |
vga_mem_writeb(addr, val & 0xff);
|
| 633 |
vga_mem_writeb(addr + 1, (val >> 8) & 0xff); |
| 634 |
} |
| 635 |
|
| 636 |
void vga_mem_writel(uint32_t addr, uint32_t val)
|
| 637 |
{
|
| 638 |
vga_mem_writeb(addr, val & 0xff);
|
| 639 |
vga_mem_writeb(addr + 1, (val >> 8) & 0xff); |
| 640 |
vga_mem_writeb(addr + 2, (val >> 16) & 0xff); |
| 641 |
vga_mem_writeb(addr + 3, (val >> 24) & 0xff); |
| 642 |
} |
| 643 |
|
| 644 |
#ifdef WORD_BIGENDIAN
|
| 645 |
#define BIG 1 |
| 646 |
#else
|
| 647 |
#define BIG 0 |
| 648 |
#endif
|
| 649 |
|
| 650 |
#ifdef WORDS_BIGENDIAN
|
| 651 |
#define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff) |
| 652 |
#else
|
| 653 |
#define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff) |
| 654 |
#endif
|
| 655 |
|
| 656 |
typedef void vga_draw_glyph8_func(uint8_t *d, int linesize, |
| 657 |
const uint8_t *font_ptr, int h, |
| 658 |
uint32_t fgcol, uint32_t bgcol); |
| 659 |
typedef void vga_draw_glyph9_func(uint8_t *d, int linesize, |
| 660 |
const uint8_t *font_ptr, int h, |
| 661 |
uint32_t fgcol, uint32_t bgcol, int dup9);
|
| 662 |
typedef void vga_draw_line_func(VGAState *s1, uint8_t *d, |
| 663 |
const uint8_t *s, int width); |
| 664 |
|
| 665 |
static inline unsigned int rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b) |
| 666 |
{
|
| 667 |
/* XXX: TODO */
|
| 668 |
return 0; |
| 669 |
} |
| 670 |
|
| 671 |
static inline unsigned int rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b) |
| 672 |
{
|
| 673 |
return ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3); |
| 674 |
} |
| 675 |
|
| 676 |
static inline unsigned int rgb_to_pixel16(unsigned int r, unsigned int g, unsigned b) |
| 677 |
{
|
| 678 |
return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3); |
| 679 |
} |
| 680 |
|
| 681 |
static inline unsigned int rgb_to_pixel32(unsigned int r, unsigned int g, unsigned b) |
| 682 |
{
|
| 683 |
return (r << 16) | (g << 8) | b; |
| 684 |
} |
| 685 |
|
| 686 |
#define DEPTH 8 |
| 687 |
#include "vga_template.h" |
| 688 |
|
| 689 |
#define DEPTH 15 |
| 690 |
#include "vga_template.h" |
| 691 |
|
| 692 |
#define DEPTH 16 |
| 693 |
#include "vga_template.h" |
| 694 |
|
| 695 |
#define DEPTH 32 |
| 696 |
#include "vga_template.h" |
| 697 |
|
| 698 |
static inline int c6_to_8(int v) |
| 699 |
{
|
| 700 |
int b;
|
| 701 |
v &= 0x3f;
|
| 702 |
b = v & 1;
|
| 703 |
return (v << 2) | (b << 1) | b; |
| 704 |
} |
| 705 |
|
| 706 |
static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b) |
| 707 |
{
|
| 708 |
unsigned int col; |
| 709 |
col = rgb_to_pixel8(r, g, b); |
| 710 |
col |= col << 8;
|
| 711 |
col |= col << 16;
|
| 712 |
return col;
|
| 713 |
} |
| 714 |
|
| 715 |
static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b) |
| 716 |
{
|
| 717 |
unsigned int col; |
| 718 |
col = rgb_to_pixel15(r, g, b); |
| 719 |
col |= col << 16;
|
| 720 |
return col;
|
| 721 |
} |
| 722 |
|
| 723 |
static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b) |
| 724 |
{
|
| 725 |
unsigned int col; |
| 726 |
col = rgb_to_pixel16(r, g, b); |
| 727 |
col |= col << 16;
|
| 728 |
return col;
|
| 729 |
} |
| 730 |
|
| 731 |
static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b) |
| 732 |
{
|
| 733 |
unsigned int col; |
| 734 |
col = rgb_to_pixel32(r, g, b); |
| 735 |
return col;
|
| 736 |
} |
| 737 |
|
| 738 |
/* return true if the palette was modified */
|
| 739 |
static int update_palette16(VGAState *s) |
| 740 |
{
|
| 741 |
int full_update, i;
|
| 742 |
uint32_t v, col, *palette; |
| 743 |
|
| 744 |
full_update = 0;
|
| 745 |
palette = s->last_palette; |
| 746 |
for(i = 0; i < 16; i++) { |
| 747 |
v = s->ar[i]; |
| 748 |
if (s->ar[0x10] & 0x80) |
| 749 |
v = ((s->ar[0x14] & 0xf) << 4) | (v & 0xf); |
| 750 |
else
|
| 751 |
v = ((s->ar[0x14] & 0xc) << 4) | (v & 0x3f); |
| 752 |
v = v * 3;
|
| 753 |
col = s->rgb_to_pixel(c6_to_8(s->palette[v]), |
| 754 |
c6_to_8(s->palette[v + 1]),
|
| 755 |
c6_to_8(s->palette[v + 2]));
|
| 756 |
if (col != palette[i]) {
|
| 757 |
full_update = 1;
|
| 758 |
palette[i] = col; |
| 759 |
} |
| 760 |
} |
| 761 |
return full_update;
|
| 762 |
} |
| 763 |
|
| 764 |
/* return true if the palette was modified */
|
| 765 |
static int update_palette256(VGAState *s) |
| 766 |
{
|
| 767 |
int full_update, i;
|
| 768 |
uint32_t v, col, *palette; |
| 769 |
|
| 770 |
full_update = 0;
|
| 771 |
palette = s->last_palette; |
| 772 |
v = 0;
|
| 773 |
for(i = 0; i < 256; i++) { |
| 774 |
col = s->rgb_to_pixel(c6_to_8(s->palette[v]), |
| 775 |
c6_to_8(s->palette[v + 1]),
|
| 776 |
c6_to_8(s->palette[v + 2]));
|
| 777 |
if (col != palette[i]) {
|
| 778 |
full_update = 1;
|
| 779 |
palette[i] = col; |
| 780 |
} |
| 781 |
v += 3;
|
| 782 |
} |
| 783 |
return full_update;
|
| 784 |
} |
| 785 |
|
| 786 |
/* update start_addr and line_offset. Return TRUE if modified */
|
| 787 |
static int update_basic_params(VGAState *s) |
| 788 |
{
|
| 789 |
int full_update;
|
| 790 |
uint32_t start_addr, line_offset, line_compare, v; |
| 791 |
|
| 792 |
full_update = 0;
|
| 793 |
/* compute line_offset in bytes */
|
| 794 |
v = (s->cr[0x51] >> 4) & 3; /* S3 extension */ |
| 795 |
if (v == 0) |
| 796 |
v = (s->cr[0x43] >> 2) & 1; /* S3 extension */ |
| 797 |
line_offset = s->cr[0x13] | (v << 8); |
| 798 |
line_offset <<= 3;
|
| 799 |
|
| 800 |
/* starting address */
|
| 801 |
start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8); |
| 802 |
start_addr |= (s->cr[0x69] & 0x1f) << 16; /* S3 extension */ |
| 803 |
|
| 804 |
/* line compare */
|
| 805 |
line_compare = s->cr[0x18] |
|
| 806 |
((s->cr[0x07] & 0x10) << 4) | |
| 807 |
((s->cr[0x09] & 0x40) << 3); |
| 808 |
|
| 809 |
if (line_offset != s->line_offset ||
|
| 810 |
start_addr != s->start_addr || |
| 811 |
line_compare != s->line_compare) {
|
| 812 |
s->line_offset = line_offset; |
| 813 |
s->start_addr = start_addr; |
| 814 |
s->line_compare = line_compare; |
| 815 |
full_update = 1;
|
| 816 |
} |
| 817 |
return full_update;
|
| 818 |
} |
| 819 |
|
| 820 |
static inline int get_depth_index(int depth) |
| 821 |
{
|
| 822 |
switch(depth) {
|
| 823 |
default:
|
| 824 |
case 8: |
| 825 |
return 0; |
| 826 |
case 15: |
| 827 |
return 1; |
| 828 |
case 16: |
| 829 |
return 2; |
| 830 |
case 32: |
| 831 |
return 3; |
| 832 |
} |
| 833 |
} |
| 834 |
|
| 835 |
static vga_draw_glyph8_func *vga_draw_glyph8_table[4] = { |
| 836 |
vga_draw_glyph8_8, |
| 837 |
vga_draw_glyph8_16, |
| 838 |
vga_draw_glyph8_16, |
| 839 |
vga_draw_glyph8_32, |
| 840 |
}; |
| 841 |
|
| 842 |
static vga_draw_glyph8_func *vga_draw_glyph16_table[4] = { |
| 843 |
vga_draw_glyph16_8, |
| 844 |
vga_draw_glyph16_16, |
| 845 |
vga_draw_glyph16_16, |
| 846 |
vga_draw_glyph16_32, |
| 847 |
}; |
| 848 |
|
| 849 |
static vga_draw_glyph9_func *vga_draw_glyph9_table[4] = { |
| 850 |
vga_draw_glyph9_8, |
| 851 |
vga_draw_glyph9_16, |
| 852 |
vga_draw_glyph9_16, |
| 853 |
vga_draw_glyph9_32, |
| 854 |
}; |
| 855 |
|
| 856 |
static const uint8_t cursor_glyph[32 * 4] = { |
| 857 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 858 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 859 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 860 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 861 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 862 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 863 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 864 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 865 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 866 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 867 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 868 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 869 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 870 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 871 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 872 |
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 873 |
}; |
| 874 |
|
| 875 |
/*
|
| 876 |
* Text mode update
|
| 877 |
* Missing:
|
| 878 |
* - double scan
|
| 879 |
* - double width
|
| 880 |
* - underline
|
| 881 |
* - flashing
|
| 882 |
*/
|
| 883 |
static void vga_draw_text(VGAState *s, int full_update) |
| 884 |
{
|
| 885 |
int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
|
| 886 |
int cx_min, cx_max, linesize, x_incr;
|
| 887 |
uint32_t offset, fgcol, bgcol, v, cursor_offset; |
| 888 |
uint8_t *d1, *d, *src, *s1, *dest, *cursor_ptr; |
| 889 |
const uint8_t *font_ptr, *font_base[2]; |
| 890 |
int dup9, line_offset, depth_index;
|
| 891 |
uint32_t *palette; |
| 892 |
uint32_t *ch_attr_ptr; |
| 893 |
vga_draw_glyph8_func *vga_draw_glyph8; |
| 894 |
vga_draw_glyph9_func *vga_draw_glyph9; |
| 895 |
|
| 896 |
full_update |= update_palette16(s); |
| 897 |
palette = s->last_palette; |
| 898 |
|
| 899 |
/* compute font data address (in plane 2) */
|
| 900 |
v = s->sr[3];
|
| 901 |
offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; |
| 902 |
if (offset != s->font_offsets[0]) { |
| 903 |
s->font_offsets[0] = offset;
|
| 904 |
full_update = 1;
|
| 905 |
} |
| 906 |
font_base[0] = s->vram_ptr + offset;
|
| 907 |
|
| 908 |
offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; |
| 909 |
font_base[1] = s->vram_ptr + offset;
|
| 910 |
if (offset != s->font_offsets[1]) { |
| 911 |
s->font_offsets[1] = offset;
|
| 912 |
full_update = 1;
|
| 913 |
} |
| 914 |
|
| 915 |
full_update |= update_basic_params(s); |
| 916 |
|
| 917 |
line_offset = s->line_offset; |
| 918 |
s1 = s->vram_ptr + (s->start_addr * 4);
|
| 919 |
|
| 920 |
/* total width & height */
|
| 921 |
cheight = (s->cr[9] & 0x1f) + 1; |
| 922 |
cw = 8;
|
| 923 |
if (s->sr[1] & 0x01) |
| 924 |
cw = 9;
|
| 925 |
if (s->sr[1] & 0x08) |
| 926 |
cw = 16; /* NOTE: no 18 pixel wide */ |
| 927 |
x_incr = cw * ((s->ds->depth + 7) >> 3); |
| 928 |
width = (s->cr[0x01] + 1); |
| 929 |
if (s->cr[0x06] == 100) { |
| 930 |
/* ugly hack for CGA 160x100x16 - explain me the logic */
|
| 931 |
height = 100;
|
| 932 |
} else {
|
| 933 |
height = s->cr[0x12] |
|
| 934 |
((s->cr[0x07] & 0x02) << 7) | |
| 935 |
((s->cr[0x07] & 0x40) << 3); |
| 936 |
height = (height + 1) / cheight;
|
| 937 |
} |
| 938 |
if (width != s->last_width || height != s->last_height ||
|
| 939 |
cw != s->last_cw || cw != s->last_cw) {
|
| 940 |
dpy_resize(s->ds, width * cw, height * cheight); |
| 941 |
s->last_width = width; |
| 942 |
s->last_height = height; |
| 943 |
s->last_ch = cheight; |
| 944 |
s->last_cw = cw; |
| 945 |
full_update = 1;
|
| 946 |
} |
| 947 |
cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr; |
| 948 |
if (cursor_offset != s->cursor_offset ||
|
| 949 |
s->cr[0xa] != s->cursor_start ||
|
| 950 |
s->cr[0xb] != s->cursor_end) {
|
| 951 |
/* if the cursor position changed, we update the old and new
|
| 952 |
chars */
|
| 953 |
if (s->cursor_offset < CH_ATTR_SIZE)
|
| 954 |
s->last_ch_attr[s->cursor_offset] = -1;
|
| 955 |
if (cursor_offset < CH_ATTR_SIZE)
|
| 956 |
s->last_ch_attr[cursor_offset] = -1;
|
| 957 |
s->cursor_offset = cursor_offset; |
| 958 |
s->cursor_start = s->cr[0xa];
|
| 959 |
s->cursor_end = s->cr[0xb];
|
| 960 |
} |
| 961 |
cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
|
| 962 |
|
| 963 |
depth_index = get_depth_index(s->ds->depth); |
| 964 |
if (cw == 16) |
| 965 |
vga_draw_glyph8 = vga_draw_glyph16_table[depth_index]; |
| 966 |
else
|
| 967 |
vga_draw_glyph8 = vga_draw_glyph8_table[depth_index]; |
| 968 |
vga_draw_glyph9 = vga_draw_glyph9_table[depth_index]; |
| 969 |
|
| 970 |
dest = s->ds->data; |
| 971 |
linesize = s->ds->linesize; |
| 972 |
ch_attr_ptr = s->last_ch_attr; |
| 973 |
for(cy = 0; cy < height; cy++) { |
| 974 |
d1 = dest; |
| 975 |
src = s1; |
| 976 |
cx_min = width; |
| 977 |
cx_max = -1;
|
| 978 |
for(cx = 0; cx < width; cx++) { |
| 979 |
ch_attr = *(uint16_t *)src; |
| 980 |
if (full_update || ch_attr != *ch_attr_ptr) {
|
| 981 |
if (cx < cx_min)
|
| 982 |
cx_min = cx; |
| 983 |
if (cx > cx_max)
|
| 984 |
cx_max = cx; |
| 985 |
*ch_attr_ptr = ch_attr; |
| 986 |
#ifdef WORDS_BIGENDIAN
|
| 987 |
ch = ch_attr >> 8;
|
| 988 |
cattr = ch_attr & 0xff;
|
| 989 |
#else
|
| 990 |
ch = ch_attr & 0xff;
|
| 991 |
cattr = ch_attr >> 8;
|
| 992 |
#endif
|
| 993 |
font_ptr = font_base[(cattr >> 3) & 1]; |
| 994 |
font_ptr += 32 * 4 * ch; |
| 995 |
bgcol = palette[cattr >> 4];
|
| 996 |
fgcol = palette[cattr & 0x0f];
|
| 997 |
if (cw != 9) { |
| 998 |
vga_draw_glyph8(d1, linesize, |
| 999 |
font_ptr, cheight, fgcol, bgcol); |
| 1000 |
} else {
|
| 1001 |
dup9 = 0;
|
| 1002 |
if (ch >= 0xb0 && ch <= 0xdf && (s->ar[0x10] & 0x04)) |
| 1003 |
dup9 = 1;
|
| 1004 |
vga_draw_glyph9(d1, linesize, |
| 1005 |
font_ptr, cheight, fgcol, bgcol, dup9); |
| 1006 |
} |
| 1007 |
if (src == cursor_ptr &&
|
| 1008 |
!(s->cr[0x0a] & 0x20)) { |
| 1009 |
int line_start, line_last, h;
|
| 1010 |
/* draw the cursor */
|
| 1011 |
line_start = s->cr[0x0a] & 0x1f; |
| 1012 |
line_last = s->cr[0x0b] & 0x1f; |
| 1013 |
/* XXX: check that */
|
| 1014 |
if (line_last > cheight - 1) |
| 1015 |
line_last = cheight - 1;
|
| 1016 |
if (line_last >= line_start && line_start < cheight) {
|
| 1017 |
h = line_last - line_start + 1;
|
| 1018 |
d = d1 + linesize * line_start; |
| 1019 |
if (cw != 9) { |
| 1020 |
vga_draw_glyph8(d, linesize, |
| 1021 |
cursor_glyph, h, fgcol, bgcol); |
| 1022 |
} else {
|
| 1023 |
vga_draw_glyph9(d, linesize, |
| 1024 |
cursor_glyph, h, fgcol, bgcol, 1);
|
| 1025 |
} |
| 1026 |
} |
| 1027 |
} |
| 1028 |
} |
| 1029 |
d1 += x_incr; |
| 1030 |
src += 4;
|
| 1031 |
ch_attr_ptr++; |
| 1032 |
} |
| 1033 |
if (cx_max != -1) { |
| 1034 |
dpy_update(s->ds, cx_min * cw, cy * cheight, |
| 1035 |
(cx_max - cx_min + 1) * cw, cheight);
|
| 1036 |
} |
| 1037 |
dest += linesize * cheight; |
| 1038 |
s1 += line_offset; |
| 1039 |
} |
| 1040 |
} |
| 1041 |
|
| 1042 |
enum {
|
| 1043 |
VGA_DRAW_LINE2, |
| 1044 |
VGA_DRAW_LINE2D2, |
| 1045 |
VGA_DRAW_LINE4, |
| 1046 |
VGA_DRAW_LINE4D2, |
| 1047 |
VGA_DRAW_LINE8D2, |
| 1048 |
VGA_DRAW_LINE8, |
| 1049 |
VGA_DRAW_LINE15, |
| 1050 |
VGA_DRAW_LINE16, |
| 1051 |
VGA_DRAW_LINE32, |
| 1052 |
VGA_DRAW_LINE_NB, |
| 1053 |
}; |
| 1054 |
|
| 1055 |
static vga_draw_line_func *vga_draw_line_table[4 * VGA_DRAW_LINE_NB] = { |
| 1056 |
vga_draw_line2_8, |
| 1057 |
vga_draw_line2_16, |
| 1058 |
vga_draw_line2_16, |
| 1059 |
vga_draw_line2_32, |
| 1060 |
|
| 1061 |
vga_draw_line2d2_8, |
| 1062 |
vga_draw_line2d2_16, |
| 1063 |
vga_draw_line2d2_16, |
| 1064 |
vga_draw_line2d2_32, |
| 1065 |
|
| 1066 |
vga_draw_line4_8, |
| 1067 |
vga_draw_line4_16, |
| 1068 |
vga_draw_line4_16, |
| 1069 |
vga_draw_line4_32, |
| 1070 |
|
| 1071 |
vga_draw_line4d2_8, |
| 1072 |
vga_draw_line4d2_16, |
| 1073 |
vga_draw_line4d2_16, |
| 1074 |
vga_draw_line4d2_32, |
| 1075 |
|
| 1076 |
vga_draw_line8d2_8, |
| 1077 |
vga_draw_line8d2_16, |
| 1078 |
vga_draw_line8d2_16, |
| 1079 |
vga_draw_line8d2_32, |
| 1080 |
|
| 1081 |
vga_draw_line8_8, |
| 1082 |
vga_draw_line8_16, |
| 1083 |
vga_draw_line8_16, |
| 1084 |
vga_draw_line8_32, |
| 1085 |
|
| 1086 |
vga_draw_line15_8, |
| 1087 |
vga_draw_line15_15, |
| 1088 |
vga_draw_line15_16, |
| 1089 |
vga_draw_line15_32, |
| 1090 |
|
| 1091 |
vga_draw_line16_8, |
| 1092 |
vga_draw_line16_15, |
| 1093 |
vga_draw_line16_16, |
| 1094 |
vga_draw_line16_32, |
| 1095 |
|
| 1096 |
vga_draw_line32_8, |
| 1097 |
vga_draw_line32_15, |
| 1098 |
vga_draw_line32_16, |
| 1099 |
vga_draw_line32_32, |
| 1100 |
}; |
| 1101 |
|
| 1102 |
/*
|
| 1103 |
* graphic modes
|
| 1104 |
* Missing:
|
| 1105 |
* - double scan
|
| 1106 |
* - double width
|
| 1107 |
*/
|
| 1108 |
static void vga_draw_graphic(VGAState *s, int full_update) |
| 1109 |
{
|
| 1110 |
int y1, y, update, page_min, page_max, linesize, y_start, double_scan, mask;
|
| 1111 |
int width, height, shift_control, line_offset, page0, page1, bwidth;
|
| 1112 |
int disp_width;
|
| 1113 |
uint8_t *d; |
| 1114 |
uint32_t v, addr1, addr; |
| 1115 |
vga_draw_line_func *vga_draw_line; |
| 1116 |
|
| 1117 |
full_update |= update_basic_params(s); |
| 1118 |
|
| 1119 |
width = (s->cr[0x01] + 1) * 8; |
| 1120 |
height = s->cr[0x12] |
|
| 1121 |
((s->cr[0x07] & 0x02) << 7) | |
| 1122 |
((s->cr[0x07] & 0x40) << 3); |
| 1123 |
height = (height + 1);
|
| 1124 |
disp_width = width; |
| 1125 |
|
| 1126 |
shift_control = (s->gr[0x05] >> 5) & 3; |
| 1127 |
double_scan = (s->cr[0x09] & 0x80); |
| 1128 |
if (shift_control != s->shift_control ||
|
| 1129 |
double_scan != s->double_scan) {
|
| 1130 |
full_update = 1;
|
| 1131 |
s->shift_control = shift_control; |
| 1132 |
s->double_scan = double_scan; |
| 1133 |
} |
| 1134 |
|
| 1135 |
if (shift_control == 0) { |
| 1136 |
full_update |= update_palette16(s); |
| 1137 |
if (s->sr[0x01] & 8) { |
| 1138 |
v = VGA_DRAW_LINE4D2; |
| 1139 |
disp_width <<= 1;
|
| 1140 |
} else {
|
| 1141 |
v = VGA_DRAW_LINE4; |
| 1142 |
} |
| 1143 |
} else if (shift_control == 1) { |
| 1144 |
full_update |= update_palette16(s); |
| 1145 |
if (s->sr[0x01] & 8) { |
| 1146 |
v = VGA_DRAW_LINE2D2; |
| 1147 |
disp_width <<= 1;
|
| 1148 |
} else {
|
| 1149 |
v = VGA_DRAW_LINE2; |
| 1150 |
} |
| 1151 |
} else {
|
| 1152 |
full_update |= update_palette256(s); |
| 1153 |
v = VGA_DRAW_LINE8D2; |
| 1154 |
double_scan = 1; /* XXX: explain me why it is always activated */ |
| 1155 |
} |
| 1156 |
vga_draw_line = vga_draw_line_table[v * 4 + get_depth_index(s->ds->depth)];
|
| 1157 |
|
| 1158 |
if (disp_width != s->last_width ||
|
| 1159 |
height != s->last_height) {
|
| 1160 |
dpy_resize(s->ds, disp_width, height); |
| 1161 |
s->last_width = disp_width; |
| 1162 |
s->last_height = height; |
| 1163 |
full_update = 1;
|
| 1164 |
} |
| 1165 |
|
| 1166 |
line_offset = s->line_offset; |
| 1167 |
#if 0
|
| 1168 |
printf("w=%d h=%d v=%d line_offset=%d double_scan=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=%02x\n",
|
| 1169 |
width, height, v, line_offset, s->cr[9], s->cr[0x17], s->line_compare, s->sr[0x01]);
|
| 1170 |
#endif
|
| 1171 |
addr1 = (s->start_addr * 4);
|
| 1172 |
bwidth = width * 4;
|
| 1173 |
y_start = -1;
|
| 1174 |
page_min = 0x7fffffff;
|
| 1175 |
page_max = -1;
|
| 1176 |
d = s->ds->data; |
| 1177 |
linesize = s->ds->linesize; |
| 1178 |
y1 = 0;
|
| 1179 |
for(y = 0; y < height; y++) { |
| 1180 |
addr = addr1; |
| 1181 |
if (!(s->cr[0x17] & 1)) { |
| 1182 |
int shift;
|
| 1183 |
/* CGA compatibility handling */
|
| 1184 |
shift = 14 + ((s->cr[0x17] >> 6) & 1); |
| 1185 |
addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); |
| 1186 |
} |
| 1187 |
if (!(s->cr[0x17] & 2)) { |
| 1188 |
addr = (addr & ~0x8000) | ((y1 & 2) << 14); |
| 1189 |
} |
| 1190 |
page0 = addr >> 12;
|
| 1191 |
page1 = (addr + bwidth - 1) >> 12; |
| 1192 |
update = full_update | s->vram_updated[page0] | s->vram_updated[page1]; |
| 1193 |
if ((page1 - page0) > 1) { |
| 1194 |
/* if wide line, can use another page */
|
| 1195 |
update |= s->vram_updated[page0 + 1];
|
| 1196 |
} |
| 1197 |
if (update) {
|
| 1198 |
if (y_start < 0) |
| 1199 |
y_start = y; |
| 1200 |
if (page0 < page_min)
|
| 1201 |
page_min = page0; |
| 1202 |
if (page1 > page_max)
|
| 1203 |
page_max = page1; |
| 1204 |
vga_draw_line(s, d, s->vram_ptr + addr, width); |
| 1205 |
} else {
|
| 1206 |
if (y_start >= 0) { |
| 1207 |
/* flush to display */
|
| 1208 |
dpy_update(s->ds, 0, y_start,
|
| 1209 |
disp_width, y - y_start); |
| 1210 |
y_start = -1;
|
| 1211 |
} |
| 1212 |
} |
| 1213 |
if (!double_scan || (y & 1) != 0) { |
| 1214 |
if (y1 == s->line_compare) {
|
| 1215 |
addr1 = 0;
|
| 1216 |
} else {
|
| 1217 |
mask = (s->cr[0x17] & 3) ^ 3; |
| 1218 |
if ((y1 & mask) == mask)
|
| 1219 |
addr1 += line_offset; |
| 1220 |
} |
| 1221 |
y1++; |
| 1222 |
} |
| 1223 |
d += linesize; |
| 1224 |
} |
| 1225 |
if (y_start >= 0) { |
| 1226 |
/* flush to display */
|
| 1227 |
dpy_update(s->ds, 0, y_start,
|
| 1228 |
disp_width, y - y_start); |
| 1229 |
} |
| 1230 |
/* reset modified pages */
|
| 1231 |
if (page_max != -1) { |
| 1232 |
memset(s->vram_updated + page_min, 0, page_max - page_min + 1); |
| 1233 |
} |
| 1234 |
} |
| 1235 |
|
| 1236 |
/* draw text terminal (very limited, just for simple boot debug
|
| 1237 |
messages) */
|
| 1238 |
static int last_cursor_pos; |
| 1239 |
|
| 1240 |
void vga_draw_dumb(VGAState *s)
|
| 1241 |
{
|
| 1242 |
int c, i, cursor_pos, eol;
|
| 1243 |
|
| 1244 |
cursor_pos = s->cr[0x0f] | (s->cr[0x0e] << 8); |
| 1245 |
eol = 0;
|
| 1246 |
for(i = last_cursor_pos; i < cursor_pos; i++) {
|
| 1247 |
/* XXX: should use vga RAM */
|
| 1248 |
c = phys_ram_base[0xb8000 + (i) * 2]; |
| 1249 |
if (c >= ' ') { |
| 1250 |
putchar(c); |
| 1251 |
eol = 0;
|
| 1252 |
} else {
|
| 1253 |
if (!eol)
|
| 1254 |
putchar('\n');
|
| 1255 |
eol = 1;
|
| 1256 |
} |
| 1257 |
} |
| 1258 |
fflush(stdout); |
| 1259 |
last_cursor_pos = cursor_pos; |
| 1260 |
} |
| 1261 |
|
| 1262 |
void vga_update_display(void) |
| 1263 |
{
|
| 1264 |
VGAState *s = &vga_state; |
| 1265 |
int full_update, graphic_mode;
|
| 1266 |
|
| 1267 |
if (s->ds->depth == 0) { |
| 1268 |
vga_draw_dumb(s); |
| 1269 |
} else {
|
| 1270 |
full_update = 0;
|
| 1271 |
graphic_mode = s->gr[6] & 1; |
| 1272 |
if (graphic_mode != s->graphic_mode) {
|
| 1273 |
s->graphic_mode = graphic_mode; |
| 1274 |
full_update = 1;
|
| 1275 |
} |
| 1276 |
if (graphic_mode)
|
| 1277 |
vga_draw_graphic(s, full_update); |
| 1278 |
else
|
| 1279 |
vga_draw_text(s, full_update); |
| 1280 |
} |
| 1281 |
} |
| 1282 |
|
| 1283 |
void vga_reset(VGAState *s)
|
| 1284 |
{
|
| 1285 |
memset(s, 0, sizeof(VGAState)); |
| 1286 |
/* chip ID for 8c968 */
|
| 1287 |
s->cr[0x2d] = 0x88; |
| 1288 |
s->cr[0x2e] = 0xb0; |
| 1289 |
s->cr[0x2f] = 0x01; /* XXX: check revision code */ |
| 1290 |
s->cr[0x30] = 0xe1; |
| 1291 |
s->graphic_mode = -1; /* force full update */ |
| 1292 |
} |
| 1293 |
|
| 1294 |
CPUReadMemoryFunc *vga_mem_read[3] = {
|
| 1295 |
vga_mem_readb, |
| 1296 |
vga_mem_readw, |
| 1297 |
vga_mem_readl, |
| 1298 |
}; |
| 1299 |
|
| 1300 |
CPUWriteMemoryFunc *vga_mem_write[3] = {
|
| 1301 |
vga_mem_writeb, |
| 1302 |
vga_mem_writew, |
| 1303 |
vga_mem_writel, |
| 1304 |
}; |
| 1305 |
|
| 1306 |
int vga_init(DisplayState *ds, uint8_t *vga_ram_base,
|
| 1307 |
unsigned long vga_ram_offset, int vga_ram_size) |
| 1308 |
{
|
| 1309 |
VGAState *s = &vga_state; |
| 1310 |
int i, j, v, b;
|
| 1311 |
|
| 1312 |
for(i = 0;i < 256; i++) { |
| 1313 |
v = 0;
|
| 1314 |
for(j = 0; j < 8; j++) { |
| 1315 |
v |= ((i >> j) & 1) << (j * 4); |
| 1316 |
} |
| 1317 |
expand4[i] = v; |
| 1318 |
|
| 1319 |
v = 0;
|
| 1320 |
for(j = 0; j < 4; j++) { |
| 1321 |
v |= ((i >> (2 * j)) & 3) << (j * 4); |
| 1322 |
} |
| 1323 |
expand2[i] = v; |
| 1324 |
} |
| 1325 |
for(i = 0; i < 16; i++) { |
| 1326 |
v = 0;
|
| 1327 |
for(j = 0; j < 4; j++) { |
| 1328 |
b = ((i >> j) & 1);
|
| 1329 |
v |= b << (2 * j);
|
| 1330 |
v |= b << (2 * j + 1); |
| 1331 |
} |
| 1332 |
expand4to8[i] = v; |
| 1333 |
} |
| 1334 |
|
| 1335 |
vga_reset(s); |
| 1336 |
|
| 1337 |
switch(ds->depth) {
|
| 1338 |
case 8: |
| 1339 |
s->rgb_to_pixel = rgb_to_pixel8_dup; |
| 1340 |
break;
|
| 1341 |
case 15: |
| 1342 |
s->rgb_to_pixel = rgb_to_pixel15_dup; |
| 1343 |
break;
|
| 1344 |
default:
|
| 1345 |
case 16: |
| 1346 |
s->rgb_to_pixel = rgb_to_pixel16_dup; |
| 1347 |
break;
|
| 1348 |
case 32: |
| 1349 |
s->rgb_to_pixel = rgb_to_pixel32_dup; |
| 1350 |
break;
|
| 1351 |
} |
| 1352 |
|
| 1353 |
s->vram_ptr = vga_ram_base; |
| 1354 |
s->vram_offset = vga_ram_offset; |
| 1355 |
s->vram_size = vga_ram_size; |
| 1356 |
s->ds = ds; |
| 1357 |
|
| 1358 |
register_ioport_write(0x3c0, 16, vga_ioport_write, 1); |
| 1359 |
|
| 1360 |
register_ioport_write(0x3b4, 2, vga_ioport_write, 1); |
| 1361 |
register_ioport_write(0x3d4, 2, vga_ioport_write, 1); |
| 1362 |
register_ioport_write(0x3ba, 1, vga_ioport_write, 1); |
| 1363 |
register_ioport_write(0x3da, 1, vga_ioport_write, 1); |
| 1364 |
|
| 1365 |
register_ioport_read(0x3c0, 16, vga_ioport_read, 1); |
| 1366 |
|
| 1367 |
register_ioport_read(0x3b4, 2, vga_ioport_read, 1); |
| 1368 |
register_ioport_read(0x3d4, 2, vga_ioport_read, 1); |
| 1369 |
register_ioport_read(0x3ba, 1, vga_ioport_read, 1); |
| 1370 |
register_ioport_read(0x3da, 1, vga_ioport_read, 1); |
| 1371 |
|
| 1372 |
vga_io_memory = cpu_register_io_memory(0, vga_mem_read, vga_mem_write);
|
| 1373 |
cpu_register_physical_memory(0xa0000, 0x20000, vga_io_memory); |
| 1374 |
return 0; |
| 1375 |
} |