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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.

 */

#include <hw/hw.h>

#include "memory.h"

#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              1600

#define VBE_DISPI_MAX_YRES              1200

#define VBE_DISPI_MAX_BPP               32

#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 /* size of vbe_regs[] */

#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa /* read-only, not in vbe_regs */

#define VBE_DISPI_ID0                   0xB0C0

#define VBE_DISPI_ID1                   0xB0C1

#define VBE_DISPI_ID2                   0xB0C2

#define VBE_DISPI_ID3                   0xB0C3

#define VBE_DISPI_ID4                   0xB0C4

#define VBE_DISPI_ID5                   0xB0C5

#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

#ifdef CONFIG_BOCHS_VBE

#define VGA_STATE_COMMON_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;                        \

    int vbe_mapped;

#else

#define VGA_STATE_COMMON_BOCHS_VBE

#endif /* !CONFIG_BOCHS_VBE */

#define CH_ATTR_SIZE (160 * 100)

#define VGA_MAX_HEIGHT 2048

struct vga_precise_retrace {

    int64_t ticks_per_char;

    int64_t total_chars;

    int htotal;

    int hstart;

    int hend;

    int vstart;

    int vend;

    int freq;

};

union vga_retrace {

    struct vga_precise_retrace precise;

};

struct VGACommonState;

typedef uint8_t (* vga_retrace_fn)(struct VGACommonState *s);

typedef void (* vga_update_retrace_info_fn)(struct VGACommonState *s);

typedef struct VGACommonState {

    MemoryRegion *legacy_address_space;

    uint8_t *vram_ptr;

    MemoryRegion vram;

    uint32_t vram_size;

    uint32_t latch;

    MemoryRegion *chain4_alias;

    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 */

    int dac_8bit;

    uint8_t palette[768];

    int32_t bank_offset;

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

    void (*get_offsets)(struct VGACommonState *s,

                        uint32_t *pline_offset,

                        uint32_t *pstart_addr,

                        uint32_t *pline_compare);

    void (*get_resolution)(struct VGACommonState *s,

                        int *pwidth,

                        int *pheight);

    VGA_STATE_COMMON_BOCHS_VBE

    /* 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;

    uint32_t plane_updated;

    uint32_t last_line_offset;

    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 */

    uint32_t last_depth; /* in bits */

    uint8_t cursor_start, cursor_end;

    uint32_t cursor_offset;

    unsigned int (*rgb_to_pixel)(unsigned int r,

                                 unsigned int g, unsigned b);

    vga_hw_update_ptr update;

    vga_hw_invalidate_ptr invalidate;

    vga_hw_screen_dump_ptr screen_dump;

    vga_hw_text_update_ptr text_update;

    /* hardware mouse cursor support */

    uint32_t invalidated_y_table[VGA_MAX_HEIGHT / 32];

    void (*cursor_invalidate)(struct VGACommonState *s);

    void (*cursor_draw_line)(struct VGACommonState *s, uint8_t *d, int y);

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

    uint32_t last_palette[256];

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

    /* retrace */

    vga_retrace_fn retrace;

    vga_update_retrace_info_fn update_retrace_info;

    union vga_retrace retrace_info;

    uint8_t is_vbe_vmstate;

} VGACommonState;

static inline int c6_to_8(int v)

{

    int b;

    v &= 0x3f;

    b = v & 1;

    return (v << 2) | (b << 1) | b;

}

void vga_common_init(VGACommonState *s, int vga_ram_size);

void vga_init(VGACommonState *s, MemoryRegion *address_space,

              MemoryRegion *address_space_io, bool init_vga_ports);

MemoryRegion *vga_init_io(VGACommonState *s,

                          const MemoryRegionPortio **vga_ports,

                          const MemoryRegionPortio **vbe_ports);

void vga_common_reset(VGACommonState *s);

void vga_dirty_log_start(VGACommonState *s);

void vga_dirty_log_stop(VGACommonState *s);

extern const VMStateDescription vmstate_vga_common;

uint32_t vga_ioport_read(void *opaque, uint32_t addr);

void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val);

uint32_t vga_mem_readb(VGACommonState *s, target_phys_addr_t addr);

void vga_mem_writeb(VGACommonState *s, target_phys_addr_t addr, uint32_t val);

void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2);

int ppm_save(const char *filename, struct DisplaySurface *ds);

void vga_draw_cursor_line_8(uint8_t *d1, const uint8_t *src1,

                            int poffset, int w,

                            unsigned int color0, unsigned int color1,

                            unsigned int color_xor);

void vga_draw_cursor_line_16(uint8_t *d1, const uint8_t *src1,

                             int poffset, int w,

                             unsigned int color0, unsigned int color1,

                             unsigned int color_xor);

void vga_draw_cursor_line_32(uint8_t *d1, const uint8_t *src1,

                             int poffset, int w,

                             unsigned int color0, unsigned int color1,

                             unsigned int color_xor);

int vga_ioport_invalid(VGACommonState *s, uint32_t addr);

void vga_init_vbe(VGACommonState *s, MemoryRegion *address_space);

extern const uint8_t sr_mask[8];

extern const uint8_t gr_mask[16];

#define VGA_RAM_SIZE (8192 * 1024)

#define VGABIOS_FILENAME "vgabios.bin"

#define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"

extern const MemoryRegionOps vga_mem_ops;