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/*

 * QEMU internal VGA defines.

 * 

 * Copyright (c) 2003-2004 Fabrice Bellard

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#define MSR_COLOR_EMULATION 0x01

#define MSR_PAGE_SELECT     0x20

#define ST01_V_RETRACE      0x08

#define ST01_DISP_ENABLE    0x01

/* bochs VBE support */

#define CONFIG_BOCHS_VBE

#define VBE_DISPI_MAX_XRES              1024

#define VBE_DISPI_MAX_YRES              768

#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_INDEX_NB              0xa

#define VBE_DISPI_ID0                   0xB0C0

#define VBE_DISPI_ID1                   0xB0C1

#define VBE_DISPI_ID2                   0xB0C2

#define VBE_DISPI_DISABLED              0x00

#define VBE_DISPI_ENABLED               0x01

#define VBE_DISPI_LFB_ENABLED           0x40

#define VBE_DISPI_NOCLEARMEM            0x80

#define VBE_DISPI_LFB_PHYSICAL_ADDRESS  0xE0000000

typedef struct VGAState {

    uint8_t *vram_ptr;

    unsigned long vram_offset;

    unsigned int vram_size;

    uint32_t latch;

    uint8_t sr_index;

    uint8_t sr[256];

    uint8_t gr_index;

    uint8_t gr[256];

    uint8_t ar_index;

    uint8_t ar[21];

    int ar_flip_flop;

    uint8_t cr_index;

    uint8_t cr[256]; /* CRT registers */

    uint8_t msr; /* Misc Output Register */

    uint8_t fcr; /* Feature Control Register */

    uint8_t st00; /* status 0 */

    uint8_t st01; /* status 1 */

    uint8_t dac_state;

    uint8_t dac_sub_index;

    uint8_t dac_read_index;

    uint8_t dac_write_index;

    uint8_t dac_cache[3]; /* used when writing */

    uint8_t palette[768];

    int32_t bank_offset;

    int (*get_bpp)(struct VGAState *s);

    void (*get_offsets)(struct VGAState *s, 

                        uint32_t *pline_offset, 

                        uint32_t *pstart_addr);

#ifdef CONFIG_BOCHS_VBE

    uint16_t vbe_index;

    uint16_t vbe_regs[VBE_DISPI_INDEX_NB];

    uint32_t vbe_start_addr;

    uint32_t vbe_line_offset;

    uint32_t vbe_bank_mask;

#endif

    /* display refresh support */

    DisplayState *ds;

    uint32_t font_offsets[2];

    int graphic_mode;

    uint8_t shift_control;

    uint8_t double_scan;

    uint32_t line_offset;

    uint32_t line_compare;

    uint32_t start_addr;

    uint8_t last_cw, last_ch;

    uint32_t last_width, last_height; /* in chars or pixels */

    uint32_t last_scr_width, last_scr_height; /* in pixels */

    uint8_t cursor_start, cursor_end;

    uint32_t cursor_offset;

    unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned b);

    /* tell for each page if it has been updated since the last time */

    uint32_t last_palette[256];

#define CH_ATTR_SIZE (160 * 100)

    uint32_t last_ch_attr[CH_ATTR_SIZE]; /* XXX: make it dynamic */

} VGAState;

void vga_common_init(VGAState *s, DisplayState *ds, uint8_t *vga_ram_base, 

                     unsigned long vga_ram_offset, int vga_ram_size);

uint32_t vga_mem_readb(void *opaque, target_phys_addr_t addr);

void vga_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val);

extern const uint8_t sr_mask[8];

extern const uint8_t gr_mask[16];