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Bochs/bochs/iodev/vga.h
Volker Ruppert 6144d8118a - text mode update code no longer depends on the memory mapping (fixes SF bug 
#1159639)
- size of text snapshot space increased to 128 kByte (for all memory mappings)
- immediately return after the panic when the number of text lines is too large
  to avoid segfault
2005-03-18 14:52:29 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: vga.h,v 1.46 2005-03-18 14:52:29 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// Make colour
#define MAKE_COLOUR(red, red_shiftfrom, red_shiftto, red_mask, \
green, green_shiftfrom, green_shiftto, green_mask, \
blue, blue_shiftfrom, blue_shiftto, blue_mask) \
( \
((((red_shiftto) > (red_shiftfrom)) ? \
(red) << ((red_shiftto) - (red_shiftfrom)) : \
(red) >> ((red_shiftfrom) - (red_shiftto))) & \
(red_mask)) | \
((((green_shiftto) > (green_shiftfrom)) ? \
(green) << ((green_shiftto) - (green_shiftfrom)) : \
(green) >> ((green_shiftfrom) - (green_shiftto))) & \
(green_mask)) | \
((((blue_shiftto) > (blue_shiftfrom)) ? \
(blue) << ((blue_shiftto) - (blue_shiftfrom)) : \
(blue) >> ((blue_shiftfrom) - (blue_shiftto))) & \
(blue_mask)) \
)
#if BX_SUPPORT_VBE
#define VBE_DISPI_TOTAL_VIDEO_MEMORY_MB 4
#define VBE_DISPI_BANK_ADDRESS 0xA0000
#define VBE_DISPI_BANK_SIZE_KB 64
#define VBE_DISPI_MAX_XRES 1024
#define VBE_DISPI_MAX_YRES 768
#define VBE_DISPI_MAX_BPP 32
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
#define VBE_DISPI_IOPORT_INDEX_OLD 0xFF80
#define VBE_DISPI_IOPORT_DATA_OLD 0xFF81
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID3 0xB0C3
#define VBE_DISPI_BPP_4 0x04
#define VBE_DISPI_BPP_8 0x08
#define VBE_DISPI_BPP_15 0x0F
#define VBE_DISPI_BPP_16 0x10
#define VBE_DISPI_BPP_24 0x18
#define VBE_DISPI_BPP_32 0x20
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_GETCAPS 0x02
#define VBE_DISPI_8BIT_DAC 0x20
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
#define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
#define VBE_DISPI_TOTAL_VIDEO_MEMORY_KB (VBE_DISPI_TOTAL_VIDEO_MEMORY_MB * 1024)
#define VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES (VBE_DISPI_TOTAL_VIDEO_MEMORY_KB * 1024)
#define BX_MAX_XRES VBE_DISPI_MAX_XRES
#define BX_MAX_YRES VBE_DISPI_MAX_YRES
#elif BX_SUPPORT_CLGD54XX
#define BX_MAX_XRES 1280
#define BX_MAX_YRES 1024
#else
#define BX_MAX_XRES 800
#define BX_MAX_YRES 600
#endif //BX_SUPPORT_VBE
#define X_TILESIZE 16
#define Y_TILESIZE 24
#define BX_NUM_X_TILES (BX_MAX_XRES /X_TILESIZE)
#define BX_NUM_Y_TILES (BX_MAX_YRES /Y_TILESIZE)
// Support varying number of rows of text. This used to
// be limited to only 25 lines.
#define BX_MAX_TEXT_LINES 100
#if BX_USE_VGA_SMF
# define BX_VGA_SMF static
# define BX_VGA_THIS theVga->
#else
# define BX_VGA_SMF
# define BX_VGA_THIS this->
#endif
class bx_vga_c : public bx_vga_stub_c {
public:
bx_vga_c(void);
~bx_vga_c(void);
virtual void init(void);
virtual void reset(unsigned type);
BX_VGA_SMF bx_bool mem_read_handler(unsigned long addr, unsigned long len, void *data, void *param);
BX_VGA_SMF bx_bool mem_write_handler(unsigned long addr, unsigned long len, void *data, void *param);
virtual Bit8u mem_read(Bit32u addr);
virtual void mem_write(Bit32u addr, Bit8u value);
virtual void trigger_timer(void *this_ptr);
virtual void dump_status(void);
#if BX_SUPPORT_VBE
BX_VGA_SMF Bit8u vbe_mem_read(Bit32u addr) BX_CPP_AttrRegparmN(1);
BX_VGA_SMF void vbe_mem_write(Bit32u addr, Bit8u value) BX_CPP_AttrRegparmN(2);
#endif
virtual void redraw_area(unsigned x0, unsigned y0,
unsigned width, unsigned height);
virtual void set_update_interval (unsigned interval);
virtual void get_text_snapshot(Bit8u **text_snapshot, unsigned *txHeight,
unsigned *txWidth);
virtual Bit8u get_actl_palette_idx(Bit8u index);
protected:
void init_iohandlers(bx_read_handler_t f_read, bx_write_handler_t f_write);
void init_systemtimer(bx_timer_handler_t f_timer);
static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
static void write_handler_no_log(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#if BX_SUPPORT_VBE
static Bit32u vbe_read_handler(void *this_ptr, Bit32u address, unsigned io_len);
static void vbe_write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#endif
struct {
struct {
bx_bool color_emulation; // 1=color emulation, base address = 3Dx
// 0=mono emulation, base address = 3Bx
bx_bool enable_ram; // enable CPU access to video memory if set
Bit8u clock_select; // 0=25Mhz 1=28Mhz
bx_bool select_high_bank; // when in odd/even modes, select
// high 64k bank if set
bx_bool horiz_sync_pol; // bit6: negative if set
bx_bool vert_sync_pol; // bit7: negative if set
// bit7,bit6 represent number of lines on display:
// 0 = reserved
// 1 = 400 lines
// 2 = 350 lines
// 3 - 480 lines
} misc_output;
struct {
Bit8u address;
Bit8u reg[0x19];
bx_bool write_protect;
} CRTC;
struct {
bx_bool flip_flop; /* 0 = address, 1 = data-write */
unsigned address; /* register number */
bx_bool video_enabled;
Bit8u palette_reg[16];
Bit8u overscan_color;
Bit8u color_plane_enable;
Bit8u horiz_pel_panning;
Bit8u color_select;
struct {
bx_bool graphics_alpha;
bx_bool display_type;
bx_bool enable_line_graphics;
bx_bool blink_intensity;
bx_bool pixel_panning_compat;
bx_bool pixel_clock_select;
bx_bool internal_palette_size;
} mode_ctrl;
} attribute_ctrl;
struct {
Bit8u write_data_register;
Bit8u write_data_cycle; /* 0, 1, 2 */
Bit8u read_data_register;
Bit8u read_data_cycle; /* 0, 1, 2 */
Bit8u dac_state;
struct {
Bit8u red;
Bit8u green;
Bit8u blue;
} data[256];
Bit8u mask;
} pel;
struct {
Bit8u index;
Bit8u set_reset;
Bit8u enable_set_reset;
Bit8u color_compare;
Bit8u data_rotate;
Bit8u raster_op;
Bit8u read_map_select;
Bit8u write_mode;
bx_bool read_mode;
bx_bool odd_even;
bx_bool chain_odd_even;
Bit8u shift_reg;
bx_bool graphics_alpha;
Bit8u memory_mapping; /* 0 = use A0000-BFFFF
* 1 = use A0000-AFFFF EGA/VGA graphics modes
* 2 = use B0000-B7FFF Monochrome modes
* 3 = use B8000-BFFFF CGA modes
*/
Bit8u color_dont_care;
Bit8u bitmask;
Bit8u latch[4];
} graphics_ctrl;
struct {
Bit8u index;
Bit8u map_mask;
bx_bool map_mask_bit[4];
bx_bool reset1;
bx_bool reset2;
Bit8u reg1;
Bit8u char_map_select;
bx_bool extended_mem;
bx_bool odd_even;
bx_bool chain_four;
} sequencer;
bx_bool vga_mem_updated;
unsigned x_tilesize;
unsigned y_tilesize;
unsigned line_offset;
unsigned line_compare;
unsigned vertical_display_end;
bx_bool vga_tile_updated[BX_NUM_X_TILES][BX_NUM_Y_TILES];
Bit8u vga_memory[256 * 1024];
Bit8u text_snapshot[128 * 1024]; // current text snapshot
Bit8u rgb[3 * 256];
Bit8u tile[X_TILESIZE * Y_TILESIZE * 4]; /**< Currently allocates the tile as large as needed. */
Bit16u charmap_address;
bx_bool x_dotclockdiv2;
bx_bool y_doublescan;
#if BX_SUPPORT_VBE
Bit8u vbe_memory[VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES];
Bit16u vbe_cur_dispi;
Bit16u vbe_xres;
Bit16u vbe_yres;
Bit16u vbe_bpp;
Bit16u vbe_max_xres;
Bit16u vbe_max_yres;
Bit16u vbe_max_bpp;
Bit16u vbe_bank;
bx_bool vbe_enabled;
Bit16u vbe_curindex;
Bit32u vbe_visible_screen_size; /**< in bytes */
Bit16u vbe_offset_x; /**< Virtual screen x start (in pixels) */
Bit16u vbe_offset_y; /**< Virtual screen y start (in pixels) */
Bit16u vbe_virtual_xres;
Bit16u vbe_virtual_yres;
Bit32u vbe_virtual_start; /**< For dealing with bpp>8, this is where the virtual screen starts. */
Bit8u vbe_bpp_multiplier; /**< We have to save this b/c sometimes we need to recalculate stuff with it. */
bx_bool vbe_lfb_enabled;
bx_bool vbe_get_capabilities;
bx_bool vbe_8bit_dac;
#endif
} s; // state information
#if !BX_USE_VGA_SMF
Bit32u read(Bit32u address, unsigned io_len);
void write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log);
#else
void write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log);
#endif
#if BX_SUPPORT_VBE
#if !BX_USE_VGA_SMF
Bit32u vbe_read(Bit32u address, unsigned io_len);
void vbe_write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log);
#else
void vbe_write(Bit32u address, Bit32u value, unsigned io_len, bx_bool no_log);
#endif
#endif
int timer_id;
bx_bool extension_init;
bx_bool extension_checked;
public:
static void timer_handler(void *);
BX_VGA_SMF void timer(void);
protected:
BX_VGA_SMF void update(void);
BX_VGA_SMF void determine_screen_dimensions(unsigned *piHeight,
unsigned *piWidth);
};
#if BX_SUPPORT_CLGD54XX
void
libvga_set_smf_pointer(bx_vga_c *theVga_ptr);
#include "iodev/svga_cirrus.h"
#endif // BX_SUPPORT_CLGD54XX
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