/* * QEMU VGA Emulator. An S3 86c968 is emulated * * Copyright (c) 2003 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define NO_THUNK_TYPE_SIZE #include "thunk.h" #include "cpu.h" #include "exec-all.h" #include "vl.h" //#define DEBUG_VGA //#define DEBUG_VGA_MEM //#define DEBUG_VGA_REG //#define DEBUG_S3 #define CONFIG_S3VGA #define MSR_COLOR_EMULATION 0x01 #define MSR_PAGE_SELECT 0x20 #define ST01_V_RETRACE 0x08 #define ST01_DISP_ENABLE 0x01 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[8]; uint8_t gr_index; uint8_t gr[16]; 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]; /* 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; 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 */ uint8_t vram_updated[VGA_RAM_SIZE / 4096]; uint32_t last_palette[256]; #define CH_ATTR_SIZE (160 * 100) uint32_t last_ch_attr[CH_ATTR_SIZE]; /* XXX: make it dynamic */ } VGAState; /* force some bits to zero */ static const uint8_t sr_mask[8] = { (uint8_t)~0xfc, (uint8_t)~0xc2, (uint8_t)~0xf0, (uint8_t)~0xc0, (uint8_t)~0xf1, (uint8_t)~0xff, (uint8_t)~0xff, (uint8_t)~0x00, }; static const uint8_t gr_mask[16] = { (uint8_t)~0xf0, /* 0x00 */ (uint8_t)~0xf0, /* 0x01 */ (uint8_t)~0xf0, /* 0x02 */ (uint8_t)~0xe0, /* 0x03 */ (uint8_t)~0xfc, /* 0x04 */ (uint8_t)~0x84, /* 0x05 */ (uint8_t)~0xf0, /* 0x06 */ (uint8_t)~0xf0, /* 0x07 */ (uint8_t)~0x00, /* 0x08 */ (uint8_t)~0xff, /* 0x09 */ (uint8_t)~0xff, /* 0x0a */ (uint8_t)~0xff, /* 0x0b */ (uint8_t)~0xff, /* 0x0c */ (uint8_t)~0xff, /* 0x0d */ (uint8_t)~0xff, /* 0x0e */ (uint8_t)~0xff, /* 0x0f */ }; #define cbswap_32(__x) \ ((uint32_t)( \ (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )) #ifdef WORDS_BIGENDIAN #define PAT(x) cbswap_32(x) #else #define PAT(x) (x) #endif #ifdef WORDS_BIGENDIAN #define BIG 1 #else #define BIG 0 #endif #ifdef WORDS_BIGENDIAN #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff) #else #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff) #endif static const uint32_t mask16[16] = { PAT(0x00000000), PAT(0x000000ff), PAT(0x0000ff00), PAT(0x0000ffff), PAT(0x00ff0000), PAT(0x00ff00ff), PAT(0x00ffff00), PAT(0x00ffffff), PAT(0xff000000), PAT(0xff0000ff), PAT(0xff00ff00), PAT(0xff00ffff), PAT(0xffff0000), PAT(0xffff00ff), PAT(0xffffff00), PAT(0xffffffff), }; #undef PAT #ifdef WORDS_BIGENDIAN #define PAT(x) (x) #else #define PAT(x) cbswap_32(x) #endif static const uint32_t dmask16[16] = { PAT(0x00000000), PAT(0x000000ff), PAT(0x0000ff00), PAT(0x0000ffff), PAT(0x00ff0000), PAT(0x00ff00ff), PAT(0x00ffff00), PAT(0x00ffffff), PAT(0xff000000), PAT(0xff0000ff), PAT(0xff00ff00), PAT(0xff00ffff), PAT(0xffff0000), PAT(0xffff00ff), PAT(0xffffff00), PAT(0xffffffff), }; static const uint32_t dmask4[4] = { PAT(0x00000000), PAT(0x0000ffff), PAT(0xffff0000), PAT(0xffffffff), }; static uint32_t expand4[256]; static uint16_t expand2[256]; static uint8_t expand4to8[16]; VGAState vga_state; int vga_io_memory; static uint32_t vga_ioport_read(CPUX86State *env, uint32_t addr) { VGAState *s = &vga_state; int val, index; /* check port range access depending on color/monochrome mode */ if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) || (addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION))) { val = 0xff; } else { switch(addr) { case 0x3c0: if (s->ar_flip_flop == 0) { val = s->ar_index; } else { val = 0; } break; case 0x3c1: index = s->ar_index & 0x1f; if (index < 21) val = s->ar[index]; else val = 0; break; case 0x3c2: val = s->st00; break; case 0x3c4: val = s->sr_index; break; case 0x3c5: val = s->sr[s->sr_index]; #ifdef DEBUG_VGA_REG printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); #endif break; case 0x3c7: val = s->dac_state; break; case 0x3c9: val = s->palette[s->dac_read_index * 3 + s->dac_sub_index]; if (++s->dac_sub_index == 3) { s->dac_sub_index = 0; s->dac_read_index++; } break; case 0x3ca: val = s->fcr; break; case 0x3cc: val = s->msr; break; case 0x3ce: val = s->gr_index; break; case 0x3cf: val = s->gr[s->gr_index]; #ifdef DEBUG_VGA_REG printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); #endif break; case 0x3b4: case 0x3d4: val = s->cr_index; break; case 0x3b5: case 0x3d5: val = s->cr[s->cr_index]; #ifdef DEBUG_VGA_REG printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); #endif #ifdef DEBUG_S3 if (s->cr_index >= 0x20) printf("S3: CR read index=0x%x val=0x%x\n", s->cr_index, val); #endif break; case 0x3ba: case 0x3da: /* just toggle to fool polling */ s->st01 ^= ST01_V_RETRACE | ST01_DISP_ENABLE; val = s->st01; s->ar_flip_flop = 0; break; default: val = 0x00; break; } } #ifdef DEBUG_VGA printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val); #endif return val; } static void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { VGAState *s = &vga_state; int index, v; /* check port range access depending on color/monochrome mode */ if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) || (addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION))) return; #ifdef DEBUG_VGA printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val); #endif switch(addr) { case 0x3c0: if (s->ar_flip_flop == 0) { val &= 0x3f; s->ar_index = val; } else { index = s->ar_index & 0x1f; switch(index) { case 0x00 ... 0x0f: s->ar[index] = val & 0x3f; break; case 0x10: s->ar[index] = val & ~0x10; break; case 0x11: s->ar[index] = val; break; case 0x12: s->ar[index] = val & ~0xc0; break; case 0x13: s->ar[index] = val & ~0xf0; break; case 0x14: s->ar[index] = val & ~0xf0; break; default: break; } } s->ar_flip_flop ^= 1; break; case 0x3c2: s->msr = val & ~0x10; break; case 0x3c4: s->sr_index = val & 7; break; case 0x3c5: #ifdef DEBUG_VGA_REG printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); #endif s->sr[s->sr_index] = val & sr_mask[s->sr_index]; break; case 0x3c7: s->dac_read_index = val; s->dac_sub_index = 0; s->dac_state = 3; break; case 0x3c8: s->dac_write_index = val; s->dac_sub_index = 0; s->dac_state = 0; break; case 0x3c9: s->dac_cache[s->dac_sub_index] = val; if (++s->dac_sub_index == 3) { memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); s->dac_sub_index = 0; s->dac_write_index++; } break; case 0x3ce: s->gr_index = val & 0x0f; break; case 0x3cf: #ifdef DEBUG_VGA_REG printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); #endif s->gr[s->gr_index] = val & gr_mask[s->gr_index]; break; case 0x3b4: case 0x3d4: s->cr_index = val; break; case 0x3b5: case 0x3d5: #ifdef DEBUG_VGA_REG printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); #endif /* handle CR0-7 protection */ if ((s->cr[11] & 0x80) && s->cr_index <= 7) { /* can always write bit 4 of CR7 */ if (s->cr_index == 7) s->cr[7] = (s->cr[7] & ~0x10) | (val & 0x10); return; } switch(s->cr_index) { case 0x01: /* horizontal display end */ case 0x07: case 0x09: case 0x0c: case 0x0d: case 0x12: /* veritcal display end */ s->cr[s->cr_index] = val; break; #ifdef CONFIG_S3VGA /* S3 registers */ case 0x2d: case 0x2e: case 0x2f: case 0x30: /* chip ID, cannot write */ break; case 0x31: /* update start address */ s->cr[s->cr_index] = val; v = (val >> 4) & 3; s->cr[0x69] = (s->cr[69] & ~0x03) | v; break; case 0x51: /* update start address */ s->cr[s->cr_index] = val; v = val & 3; s->cr[0x69] = (s->cr[69] & ~0x0c) | (v << 2); break; #endif default: s->cr[s->cr_index] = val; break; } #ifdef DEBUG_S3 if (s->cr_index >= 0x20) printf("S3: CR write index=0x%x val=0x%x\n", s->cr_index, val); #endif break; case 0x3ba: case 0x3da: s->fcr = val & 0x10; break; } } /* called for accesses between 0xa0000 and 0xc0000 */ static uint32_t vga_mem_readb(uint32_t addr) { VGAState *s = &vga_state; int memory_map_mode, plane; uint32_t ret; /* convert to VGA memory offset */ memory_map_mode = (s->gr[6] >> 2) & 3; switch(memory_map_mode) { case 0: addr -= 0xa0000; break; case 1: addr -= 0xa0000; if (addr >= 0x10000) return 0xff; break; case 2: addr -= 0xb0000; if (addr >= 0x8000) return 0xff; break; default: case 3: addr -= 0xb8000; break; } if (s->sr[4] & 0x08) { /* chain 4 mode : simplest access */ ret = s->vram_ptr[addr]; } else if (s->gr[5] & 0x10) { /* odd/even mode (aka text mode mapping) */ plane = (s->gr[4] & 2) | (addr & 1); ret = s->vram_ptr[((addr & ~1) << 1) | plane]; } else { /* standard VGA latched access */ s->latch = ((uint32_t *)s->vram_ptr)[addr]; if (!(s->gr[5] & 0x08)) { /* read mode 0 */ plane = s->gr[4]; ret = GET_PLANE(s->latch, plane); } else { /* read mode 1 */ ret = (s->latch ^ mask16[s->gr[2]]) & mask16[s->gr[7]]; ret |= ret >> 16; ret |= ret >> 8; ret = (~ret) & 0xff; } } return ret; } static uint32_t vga_mem_readw(uint32_t addr) { uint32_t v; v = vga_mem_readb(addr); v |= vga_mem_readb(addr + 1) << 8; return v; } static uint32_t vga_mem_readl(uint32_t addr) { uint32_t v; v = vga_mem_readb(addr); v |= vga_mem_readb(addr + 1) << 8; v |= vga_mem_readb(addr + 2) << 16; v |= vga_mem_readb(addr + 3) << 24; return v; } /* called for accesses between 0xa0000 and 0xc0000 */ void vga_mem_writeb(uint32_t addr, uint32_t val) { VGAState *s = &vga_state; int memory_map_mode, plane, write_mode, b, func_select; uint32_t write_mask, bit_mask, set_mask; #ifdef DEBUG_VGA_MEM printf("vga: [0x%x] = 0x%02x\n", addr, val); #endif /* convert to VGA memory offset */ memory_map_mode = (s->gr[6] >> 2) & 3; switch(memory_map_mode) { case 0: addr -= 0xa0000; break; case 1: addr -= 0xa0000; if (addr >= 0x10000) return; break; case 2: addr -= 0xb0000; if (addr >= 0x8000) return; break; default: case 3: addr -= 0xb8000; break; } if (s->sr[4] & 0x08) { /* chain 4 mode : simplest access */ plane = addr & 3; if (s->sr[2] & (1 << plane)) { s->vram_ptr[addr] = val; #ifdef DEBUG_VGA_MEM printf("vga: chain4: [0x%x]\n", addr); #endif s->vram_updated[addr >> 12] = 1; } } else if (s->gr[5] & 0x10) { /* odd/even mode (aka text mode mapping) */ plane = (s->gr[4] & 2) | (addr & 1); if (s->sr[2] & (1 << plane)) { addr = ((addr & ~1) << 1) | plane; s->vram_ptr[addr] = val; #ifdef DEBUG_VGA_MEM printf("vga: odd/even: [0x%x]\n", addr); #endif s->vram_updated[addr >> 12] = 1; } } else { /* standard VGA latched access */ write_mode = s->gr[5] & 3; switch(write_mode) { default: case 0: /* rotate */ b = s->gr[3] & 7; val = ((val >> b) | (val << (8 - b))) & 0xff; val |= val << 8; val |= val << 16; /* apply set/reset mask */ set_mask = mask16[s->gr[1]]; val = (val & ~set_mask) | (mask16[s->gr[0]] & set_mask); bit_mask = s->gr[8]; break; case 1: val = s->latch; goto do_write; case 2: val = mask16[val & 0x0f]; bit_mask = s->gr[8]; break; case 3: /* rotate */ b = s->gr[3] & 7; val = (val >> b) | (val << (8 - b)); bit_mask = s->gr[8] & val; val = mask16[s->gr[0]]; break; } /* apply logical operation */ func_select = s->gr[3] >> 3; switch(func_select) { case 0: default: /* nothing to do */ break; case 1: /* and */ val &= s->latch; break; case 2: /* or */ val |= s->latch; break; case 3: /* xor */ val ^= s->latch; break; } /* apply bit mask */ bit_mask |= bit_mask << 8; bit_mask |= bit_mask << 16; val = (val & bit_mask) | (s->latch & ~bit_mask); do_write: /* mask data according to sr[2] */ write_mask = mask16[s->sr[2]]; ((uint32_t *)s->vram_ptr)[addr] = (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | (val & write_mask); #ifdef DEBUG_VGA_MEM printf("vga: latch: [0x%x] mask=0x%08x val=0x%08x\n", addr * 4, write_mask, val); #endif s->vram_updated[addr >> 10] = 1; } } void vga_mem_writew(uint32_t addr, uint32_t val) { vga_mem_writeb(addr, val & 0xff); vga_mem_writeb(addr + 1, (val >> 8) & 0xff); } void vga_mem_writel(uint32_t addr, uint32_t val) { vga_mem_writeb(addr, val & 0xff); vga_mem_writeb(addr + 1, (val >> 8) & 0xff); vga_mem_writeb(addr + 2, (val >> 16) & 0xff); vga_mem_writeb(addr + 3, (val >> 24) & 0xff); } typedef void vga_draw_glyph8_func(uint8_t *d, int linesize, const uint8_t *font_ptr, int h, uint32_t fgcol, uint32_t bgcol); typedef void vga_draw_glyph9_func(uint8_t *d, int linesize, const uint8_t *font_ptr, int h, uint32_t fgcol, uint32_t bgcol, int dup9); typedef void vga_draw_line_func(VGAState *s1, uint8_t *d, const uint8_t *s, int width); static inline unsigned int rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b) { /* XXX: TODO */ return 0; } static inline unsigned int rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b) { return ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3); } static inline unsigned int rgb_to_pixel16(unsigned int r, unsigned int g, unsigned b) { return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3); } static inline unsigned int rgb_to_pixel32(unsigned int r, unsigned int g, unsigned b) { return (r << 16) | (g << 8) | b; } #define DEPTH 8 #include "vga_template.h" #define DEPTH 15 #include "vga_template.h" #define DEPTH 16 #include "vga_template.h" #define DEPTH 32 #include "vga_template.h" static inline int c6_to_8(int v) { int b; v &= 0x3f; b = v & 1; return (v << 2) | (b << 1) | b; } static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b) { unsigned int col; col = rgb_to_pixel8(r, g, b); col |= col << 8; col |= col << 16; return col; } static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b) { unsigned int col; col = rgb_to_pixel15(r, g, b); col |= col << 16; return col; } static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b) { unsigned int col; col = rgb_to_pixel16(r, g, b); col |= col << 16; return col; } static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b) { unsigned int col; col = rgb_to_pixel32(r, g, b); return col; } /* return true if the palette was modified */ static int update_palette16(VGAState *s) { int full_update, i; uint32_t v, col, *palette; full_update = 0; palette = s->last_palette; for(i = 0; i < 16; i++) { v = s->ar[i]; if (s->ar[0x10] & 0x80) v = ((s->ar[0x14] & 0xf) << 4) | (v & 0xf); else v = ((s->ar[0x14] & 0xc) << 4) | (v & 0x3f); v = v * 3; col = s->rgb_to_pixel(c6_to_8(s->palette[v]), c6_to_8(s->palette[v + 1]), c6_to_8(s->palette[v + 2])); if (col != palette[i]) { full_update = 1; palette[i] = col; } } return full_update; } /* return true if the palette was modified */ static int update_palette256(VGAState *s) { int full_update, i; uint32_t v, col, *palette; full_update = 0; palette = s->last_palette; v = 0; for(i = 0; i < 256; i++) { col = s->rgb_to_pixel(c6_to_8(s->palette[v]), c6_to_8(s->palette[v + 1]), c6_to_8(s->palette[v + 2])); if (col != palette[i]) { full_update = 1; palette[i] = col; } v += 3; } return full_update; } /* update start_addr and line_offset. Return TRUE if modified */ static int update_basic_params(VGAState *s) { int full_update; uint32_t start_addr, line_offset, line_compare, v; full_update = 0; /* compute line_offset in bytes */ line_offset = s->cr[0x13]; #ifdef CONFIG_S3VGA v = (s->cr[0x51] >> 4) & 3; /* S3 extension */ if (v == 0) v = (s->cr[0x43] >> 2) & 1; /* S3 extension */ line_offset |= (v << 8); #endif line_offset <<= 3; /* starting address */ start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8); #ifdef CONFIG_S3VGA start_addr |= (s->cr[0x69] & 0x1f) << 16; /* S3 extension */ #endif /* line compare */ line_compare = s->cr[0x18] | ((s->cr[0x07] & 0x10) << 4) | ((s->cr[0x09] & 0x40) << 3); if (line_offset != s->line_offset || start_addr != s->start_addr || line_compare != s->line_compare) { s->line_offset = line_offset; s->start_addr = start_addr; s->line_compare = line_compare; full_update = 1; } return full_update; } static inline int get_depth_index(int depth) { switch(depth) { default: case 8: return 0; case 15: return 1; case 16: return 2; case 32: return 3; } } static vga_draw_glyph8_func *vga_draw_glyph8_table[4] = { vga_draw_glyph8_8, vga_draw_glyph8_16, vga_draw_glyph8_16, vga_draw_glyph8_32, }; static vga_draw_glyph8_func *vga_draw_glyph16_table[4] = { vga_draw_glyph16_8, vga_draw_glyph16_16, vga_draw_glyph16_16, vga_draw_glyph16_32, }; static vga_draw_glyph9_func *vga_draw_glyph9_table[4] = { vga_draw_glyph9_8, vga_draw_glyph9_16, vga_draw_glyph9_16, vga_draw_glyph9_32, }; static const uint8_t cursor_glyph[32 * 4] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; /* * Text mode update * Missing: * - double scan * - double width * - underline * - flashing */ static void vga_draw_text(VGAState *s, int full_update) { int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr; int cx_min, cx_max, linesize, x_incr; uint32_t offset, fgcol, bgcol, v, cursor_offset; uint8_t *d1, *d, *src, *s1, *dest, *cursor_ptr; const uint8_t *font_ptr, *font_base[2]; int dup9, line_offset, depth_index; uint32_t *palette; uint32_t *ch_attr_ptr; vga_draw_glyph8_func *vga_draw_glyph8; vga_draw_glyph9_func *vga_draw_glyph9; full_update |= update_palette16(s); palette = s->last_palette; /* compute font data address (in plane 2) */ v = s->sr[3]; offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; if (offset != s->font_offsets[0]) { s->font_offsets[0] = offset; full_update = 1; } font_base[0] = s->vram_ptr + offset; offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; font_base[1] = s->vram_ptr + offset; if (offset != s->font_offsets[1]) { s->font_offsets[1] = offset; full_update = 1; } full_update |= update_basic_params(s); line_offset = s->line_offset; s1 = s->vram_ptr + (s->start_addr * 4); /* total width & height */ cheight = (s->cr[9] & 0x1f) + 1; cw = 8; if (s->sr[1] & 0x01) cw = 9; if (s->sr[1] & 0x08) cw = 16; /* NOTE: no 18 pixel wide */ x_incr = cw * ((s->ds->depth + 7) >> 3); width = (s->cr[0x01] + 1); if (s->cr[0x06] == 100) { /* ugly hack for CGA 160x100x16 - explain me the logic */ height = 100; } else { height = s->cr[0x12] | ((s->cr[0x07] & 0x02) << 7) | ((s->cr[0x07] & 0x40) << 3); height = (height + 1) / cheight; } if (width != s->last_width || height != s->last_height || cw != s->last_cw || cw != s->last_cw) { dpy_resize(s->ds, width * cw, height * cheight); s->last_width = width; s->last_height = height; s->last_ch = cheight; s->last_cw = cw; full_update = 1; } cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr; if (cursor_offset != s->cursor_offset || s->cr[0xa] != s->cursor_start || s->cr[0xb] != s->cursor_end) { /* if the cursor position changed, we update the old and new chars */ if (s->cursor_offset < CH_ATTR_SIZE) s->last_ch_attr[s->cursor_offset] = -1; if (cursor_offset < CH_ATTR_SIZE) s->last_ch_attr[cursor_offset] = -1; s->cursor_offset = cursor_offset; s->cursor_start = s->cr[0xa]; s->cursor_end = s->cr[0xb]; } cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4; depth_index = get_depth_index(s->ds->depth); if (cw == 16) vga_draw_glyph8 = vga_draw_glyph16_table[depth_index]; else vga_draw_glyph8 = vga_draw_glyph8_table[depth_index]; vga_draw_glyph9 = vga_draw_glyph9_table[depth_index]; dest = s->ds->data; linesize = s->ds->linesize; ch_attr_ptr = s->last_ch_attr; for(cy = 0; cy < height; cy++) { d1 = dest; src = s1; cx_min = width; cx_max = -1; for(cx = 0; cx < width; cx++) { ch_attr = *(uint16_t *)src; if (full_update || ch_attr != *ch_attr_ptr) { if (cx < cx_min) cx_min = cx; if (cx > cx_max) cx_max = cx; *ch_attr_ptr = ch_attr; #ifdef WORDS_BIGENDIAN ch = ch_attr >> 8; cattr = ch_attr & 0xff; #else ch = ch_attr & 0xff; cattr = ch_attr >> 8; #endif font_ptr = font_base[(cattr >> 3) & 1]; font_ptr += 32 * 4 * ch; bgcol = palette[cattr >> 4]; fgcol = palette[cattr & 0x0f]; if (cw != 9) { vga_draw_glyph8(d1, linesize, font_ptr, cheight, fgcol, bgcol); } else { dup9 = 0; if (ch >= 0xb0 && ch <= 0xdf && (s->ar[0x10] & 0x04)) dup9 = 1; vga_draw_glyph9(d1, linesize, font_ptr, cheight, fgcol, bgcol, dup9); } if (src == cursor_ptr && !(s->cr[0x0a] & 0x20)) { int line_start, line_last, h; /* draw the cursor */ line_start = s->cr[0x0a] & 0x1f; line_last = s->cr[0x0b] & 0x1f; /* XXX: check that */ if (line_last > cheight - 1) line_last = cheight - 1; if (line_last >= line_start && line_start < cheight) { h = line_last - line_start + 1; d = d1 + linesize * line_start; if (cw != 9) { vga_draw_glyph8(d, linesize, cursor_glyph, h, fgcol, bgcol); } else { vga_draw_glyph9(d, linesize, cursor_glyph, h, fgcol, bgcol, 1); } } } } d1 += x_incr; src += 4; ch_attr_ptr++; } if (cx_max != -1) { dpy_update(s->ds, cx_min * cw, cy * cheight, (cx_max - cx_min + 1) * cw, cheight); } dest += linesize * cheight; s1 += line_offset; } } enum { VGA_DRAW_LINE2, VGA_DRAW_LINE2D2, VGA_DRAW_LINE4, VGA_DRAW_LINE4D2, VGA_DRAW_LINE8D2, VGA_DRAW_LINE8, VGA_DRAW_LINE15, VGA_DRAW_LINE16, VGA_DRAW_LINE32, VGA_DRAW_LINE_NB, }; static vga_draw_line_func *vga_draw_line_table[4 * VGA_DRAW_LINE_NB] = { vga_draw_line2_8, vga_draw_line2_16, vga_draw_line2_16, vga_draw_line2_32, vga_draw_line2d2_8, vga_draw_line2d2_16, vga_draw_line2d2_16, vga_draw_line2d2_32, vga_draw_line4_8, vga_draw_line4_16, vga_draw_line4_16, vga_draw_line4_32, vga_draw_line4d2_8, vga_draw_line4d2_16, vga_draw_line4d2_16, vga_draw_line4d2_32, vga_draw_line8d2_8, vga_draw_line8d2_16, vga_draw_line8d2_16, vga_draw_line8d2_32, vga_draw_line8_8, vga_draw_line8_16, vga_draw_line8_16, vga_draw_line8_32, vga_draw_line15_8, vga_draw_line15_15, vga_draw_line15_16, vga_draw_line15_32, vga_draw_line16_8, vga_draw_line16_15, vga_draw_line16_16, vga_draw_line16_32, vga_draw_line32_8, vga_draw_line32_15, vga_draw_line32_16, vga_draw_line32_32, }; /* * graphic modes * Missing: * - double scan * - double width */ static void vga_draw_graphic(VGAState *s, int full_update) { int y1, y, update, page_min, page_max, linesize, y_start, double_scan, mask; int width, height, shift_control, line_offset, page0, page1, bwidth; int disp_width, multi_scan, multi_run; uint8_t *d; uint32_t v, addr1, addr; vga_draw_line_func *vga_draw_line; full_update |= update_basic_params(s); width = (s->cr[0x01] + 1) * 8; height = s->cr[0x12] | ((s->cr[0x07] & 0x02) << 7) | ((s->cr[0x07] & 0x40) << 3); height = (height + 1); disp_width = width; shift_control = (s->gr[0x05] >> 5) & 3; double_scan = (s->cr[0x09] & 0x80); if (shift_control > 1) { multi_scan = (s->cr[0x09] & 0x1f); } else { multi_scan = 0; } multi_run = multi_scan; if (shift_control != s->shift_control || double_scan != s->double_scan) { full_update = 1; s->shift_control = shift_control; s->double_scan = double_scan; } if (shift_control == 0) { full_update |= update_palette16(s); if (s->sr[0x01] & 8) { v = VGA_DRAW_LINE4D2; disp_width <<= 1; } else { v = VGA_DRAW_LINE4; } } else if (shift_control == 1) { full_update |= update_palette16(s); if (s->sr[0x01] & 8) { v = VGA_DRAW_LINE2D2; disp_width <<= 1; } else { v = VGA_DRAW_LINE2; } } else { full_update |= update_palette256(s); v = VGA_DRAW_LINE8D2; } vga_draw_line = vga_draw_line_table[v * 4 + get_depth_index(s->ds->depth)]; if (disp_width != s->last_width || height != s->last_height) { dpy_resize(s->ds, disp_width, height); s->last_width = disp_width; s->last_height = height; full_update = 1; } line_offset = s->line_offset; #if 0 printf("w=%d h=%d v=%d line_offset=%d double_scan=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=%02x\n", width, height, v, line_offset, s->cr[9], s->cr[0x17], s->line_compare, s->sr[0x01]); #endif addr1 = (s->start_addr * 4); bwidth = width * 4; y_start = -1; page_min = 0x7fffffff; page_max = -1; d = s->ds->data; linesize = s->ds->linesize; y1 = 0; for(y = 0; y < height; y++) { addr = addr1; if (!(s->cr[0x17] & 1)) { int shift; /* CGA compatibility handling */ shift = 14 + ((s->cr[0x17] >> 6) & 1); addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); } if (!(s->cr[0x17] & 2)) { addr = (addr & ~0x8000) | ((y1 & 2) << 14); } page0 = addr >> 12; page1 = (addr + bwidth - 1) >> 12; update = full_update | s->vram_updated[page0] | s->vram_updated[page1]; if ((page1 - page0) > 1) { /* if wide line, can use another page */ update |= s->vram_updated[page0 + 1]; } if (update) { if (y_start < 0) y_start = y; if (page0 < page_min) page_min = page0; if (page1 > page_max) page_max = page1; vga_draw_line(s, d, s->vram_ptr + addr, width); } else { if (y_start >= 0) { /* flush to display */ dpy_update(s->ds, 0, y_start, disp_width, y - y_start); y_start = -1; } } if (!multi_run) { if (!double_scan || (y & 1) != 0) { if (y1 == s->line_compare) { addr1 = 0; } else { mask = (s->cr[0x17] & 3) ^ 3; if ((y1 & mask) == mask) addr1 += line_offset; } y1++; } multi_run = multi_scan; } else { multi_run--; y1++; } d += linesize; } if (y_start >= 0) { /* flush to display */ dpy_update(s->ds, 0, y_start, disp_width, y - y_start); } /* reset modified pages */ if (page_max != -1) { memset(s->vram_updated + page_min, 0, page_max - page_min + 1); } } /* draw text terminal (very limited, just for simple boot debug messages) */ static int last_cursor_pos; void vga_draw_dumb(VGAState *s) { int c, i, cursor_pos, eol; cursor_pos = s->cr[0x0f] | (s->cr[0x0e] << 8); eol = 0; for(i = last_cursor_pos; i < cursor_pos; i++) { /* XXX: should use vga RAM */ c = phys_ram_base[0xb8000 + (i) * 2]; if (c >= ' ') { putchar(c); eol = 0; } else { if (!eol) putchar('\n'); eol = 1; } } fflush(stdout); last_cursor_pos = cursor_pos; } void vga_update_display(void) { VGAState *s = &vga_state; int full_update, graphic_mode; if (s->ds->depth == 0) { vga_draw_dumb(s); } else { full_update = 0; graphic_mode = s->gr[6] & 1; if (graphic_mode != s->graphic_mode) { s->graphic_mode = graphic_mode; full_update = 1; } if (graphic_mode) vga_draw_graphic(s, full_update); else vga_draw_text(s, full_update); } } void vga_reset(VGAState *s) { memset(s, 0, sizeof(VGAState)); #ifdef CONFIG_S3VGA /* chip ID for 8c968 */ s->cr[0x2d] = 0x88; s->cr[0x2e] = 0xb0; s->cr[0x2f] = 0x01; /* XXX: check revision code */ s->cr[0x30] = 0xe1; #endif s->graphic_mode = -1; /* force full update */ } CPUReadMemoryFunc *vga_mem_read[3] = { vga_mem_readb, vga_mem_readw, vga_mem_readl, }; CPUWriteMemoryFunc *vga_mem_write[3] = { vga_mem_writeb, vga_mem_writew, vga_mem_writel, }; int vga_init(DisplayState *ds, uint8_t *vga_ram_base, unsigned long vga_ram_offset, int vga_ram_size) { VGAState *s = &vga_state; int i, j, v, b; for(i = 0;i < 256; i++) { v = 0; for(j = 0; j < 8; j++) { v |= ((i >> j) & 1) << (j * 4); } expand4[i] = v; v = 0; for(j = 0; j < 4; j++) { v |= ((i >> (2 * j)) & 3) << (j * 4); } expand2[i] = v; } for(i = 0; i < 16; i++) { v = 0; for(j = 0; j < 4; j++) { b = ((i >> j) & 1); v |= b << (2 * j); v |= b << (2 * j + 1); } expand4to8[i] = v; } vga_reset(s); switch(ds->depth) { case 8: s->rgb_to_pixel = rgb_to_pixel8_dup; break; case 15: s->rgb_to_pixel = rgb_to_pixel15_dup; break; default: case 16: s->rgb_to_pixel = rgb_to_pixel16_dup; break; case 32: s->rgb_to_pixel = rgb_to_pixel32_dup; break; } s->vram_ptr = vga_ram_base; s->vram_offset = vga_ram_offset; s->vram_size = vga_ram_size; s->ds = ds; register_ioport_write(0x3c0, 16, vga_ioport_write, 1); register_ioport_write(0x3b4, 2, vga_ioport_write, 1); register_ioport_write(0x3d4, 2, vga_ioport_write, 1); register_ioport_write(0x3ba, 1, vga_ioport_write, 1); register_ioport_write(0x3da, 1, vga_ioport_write, 1); register_ioport_read(0x3c0, 16, vga_ioport_read, 1); register_ioport_read(0x3b4, 2, vga_ioport_read, 1); register_ioport_read(0x3d4, 2, vga_ioport_read, 1); register_ioport_read(0x3ba, 1, vga_ioport_read, 1); register_ioport_read(0x3da, 1, vga_ioport_read, 1); vga_io_memory = cpu_register_io_memory(0, vga_mem_read, vga_mem_write); cpu_register_physical_memory(0xa0000, 0x20000, vga_io_memory); return 0; }