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-rw-r--r--hw/vga.c1945
1 files changed, 1945 insertions, 0 deletions
diff --git a/hw/vga.c b/hw/vga.c
new file mode 100644
index 0000000..8f748b3
--- /dev/null
+++ b/hw/vga.c
@@ -0,0 +1,1945 @@
+/*
+ * QEMU VGA Emulator.
+ *
+ * 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 "vl.h"
+#include "vga_int.h"
+
+//#define DEBUG_VGA
+//#define DEBUG_VGA_MEM
+//#define DEBUG_VGA_REG
+
+//#define DEBUG_BOCHS_VBE
+
+/* force some bits to zero */
+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,
+};
+
+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 void vga_screen_dump(void *opaque, const char *filename);
+
+static uint32_t vga_ioport_read(void *opaque, uint32_t addr)
+{
+ VGAState *s = opaque;
+ 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 0x3c8:
+ val = s->dac_write_index;
+ 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
+ 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;
+ }
+ }
+#if defined(DEBUG_VGA)
+ printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
+#endif
+ return val;
+}
+
+static void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ VGAState *s = opaque;
+ int 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)))
+ 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[0x11] & 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;
+ default:
+ s->cr[s->cr_index] = val;
+ break;
+ }
+ break;
+ case 0x3ba:
+ case 0x3da:
+ s->fcr = val & 0x10;
+ break;
+ }
+}
+
+#ifdef CONFIG_BOCHS_VBE
+static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
+{
+ VGAState *s = opaque;
+ uint32_t val;
+ val = s->vbe_index;
+ return val;
+}
+
+static uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
+{
+ VGAState *s = opaque;
+ uint32_t val;
+
+ if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
+ if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
+ switch(s->vbe_index) {
+ /* XXX: do not hardcode ? */
+ case VBE_DISPI_INDEX_XRES:
+ val = VBE_DISPI_MAX_XRES;
+ break;
+ case VBE_DISPI_INDEX_YRES:
+ val = VBE_DISPI_MAX_YRES;
+ break;
+ case VBE_DISPI_INDEX_BPP:
+ val = VBE_DISPI_MAX_BPP;
+ break;
+ default:
+ val = s->vbe_regs[s->vbe_index];
+ break;
+ }
+ } else {
+ val = s->vbe_regs[s->vbe_index];
+ }
+ } else {
+ val = 0;
+ }
+#ifdef DEBUG_BOCHS_VBE
+ printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
+#endif
+ return val;
+}
+
+static void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
+{
+ VGAState *s = opaque;
+ s->vbe_index = val;
+}
+
+static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
+{
+ VGAState *s = opaque;
+
+ if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
+#ifdef DEBUG_BOCHS_VBE
+ printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
+#endif
+ switch(s->vbe_index) {
+ case VBE_DISPI_INDEX_ID:
+ if (val == VBE_DISPI_ID0 ||
+ val == VBE_DISPI_ID1 ||
+ val == VBE_DISPI_ID2) {
+ s->vbe_regs[s->vbe_index] = val;
+ }
+ break;
+ case VBE_DISPI_INDEX_XRES:
+ if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
+ s->vbe_regs[s->vbe_index] = val;
+ }
+ break;
+ case VBE_DISPI_INDEX_YRES:
+ if (val <= VBE_DISPI_MAX_YRES) {
+ s->vbe_regs[s->vbe_index] = val;
+ }
+ break;
+ case VBE_DISPI_INDEX_BPP:
+ if (val == 0)
+ val = 8;
+ if (val == 4 || val == 8 || val == 15 ||
+ val == 16 || val == 24 || val == 32) {
+ s->vbe_regs[s->vbe_index] = val;
+ }
+ break;
+ case VBE_DISPI_INDEX_BANK:
+ val &= s->vbe_bank_mask;
+ s->vbe_regs[s->vbe_index] = val;
+ s->bank_offset = (val << 16);
+ break;
+ case VBE_DISPI_INDEX_ENABLE:
+ if ((val & VBE_DISPI_ENABLED) &&
+ !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
+ int h, shift_control;
+
+ s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
+ s->vbe_regs[VBE_DISPI_INDEX_XRES];
+ s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
+ s->vbe_regs[VBE_DISPI_INDEX_YRES];
+ s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
+ s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
+
+ if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
+ s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
+ else
+ s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
+ ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
+ s->vbe_start_addr = 0;
+
+ /* clear the screen (should be done in BIOS) */
+ if (!(val & VBE_DISPI_NOCLEARMEM)) {
+ memset(s->vram_ptr, 0,
+ s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
+ }
+
+ /* we initialize the VGA graphic mode (should be done
+ in BIOS) */
+ s->gr[0x06] = (s->gr[0x06] & ~0x0c) | 0x05; /* graphic mode + memory map 1 */
+ s->cr[0x17] |= 3; /* no CGA modes */
+ s->cr[0x13] = s->vbe_line_offset >> 3;
+ /* width */
+ s->cr[0x01] = (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
+ /* height (only meaningful if < 1024) */
+ h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
+ s->cr[0x12] = h;
+ s->cr[0x07] = (s->cr[0x07] & ~0x42) |
+ ((h >> 7) & 0x02) | ((h >> 3) & 0x40);
+ /* line compare to 1023 */
+ s->cr[0x18] = 0xff;
+ s->cr[0x07] |= 0x10;
+ s->cr[0x09] |= 0x40;
+
+ if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
+ shift_control = 0;
+ s->sr[0x01] &= ~8; /* no double line */
+ } else {
+ shift_control = 2;
+ s->sr[4] |= 0x08; /* set chain 4 mode */
+ s->sr[2] |= 0x0f; /* activate all planes */
+ }
+ s->gr[0x05] = (s->gr[0x05] & ~0x60) | (shift_control << 5);
+ s->cr[0x09] &= ~0x9f; /* no double scan */
+ } else {
+ /* XXX: the bios should do that */
+ s->bank_offset = 0;
+ }
+ s->vbe_regs[s->vbe_index] = val;
+ break;
+ case VBE_DISPI_INDEX_VIRT_WIDTH:
+ {
+ int w, h, line_offset;
+
+ if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
+ return;
+ w = val;
+ if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
+ line_offset = w >> 1;
+ else
+ line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
+ h = s->vram_size / line_offset;
+ /* XXX: support weird bochs semantics ? */
+ if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
+ return;
+ s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
+ s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
+ s->vbe_line_offset = line_offset;
+ }
+ break;
+ case VBE_DISPI_INDEX_X_OFFSET:
+ case VBE_DISPI_INDEX_Y_OFFSET:
+ {
+ int x;
+ s->vbe_regs[s->vbe_index] = val;
+ s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
+ x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
+ if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
+ s->vbe_start_addr += x >> 1;
+ else
+ s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
+ s->vbe_start_addr >>= 2;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+}
+#endif
+
+/* called for accesses between 0xa0000 and 0xc0000 */
+uint32_t vga_mem_readb(void *opaque, target_phys_addr_t addr)
+{
+ VGAState *s = opaque;
+ int memory_map_mode, plane;
+ uint32_t ret;
+
+ /* convert to VGA memory offset */
+ memory_map_mode = (s->gr[6] >> 2) & 3;
+ addr &= 0x1ffff;
+ switch(memory_map_mode) {
+ case 0:
+ break;
+ case 1:
+ if (addr >= 0x10000)
+ return 0xff;
+ addr += s->bank_offset;
+ break;
+ case 2:
+ addr -= 0x10000;
+ if (addr >= 0x8000)
+ return 0xff;
+ break;
+ default:
+ case 3:
+ addr -= 0x18000;
+ if (addr >= 0x8000)
+ return 0xff;
+ 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(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+#ifdef TARGET_WORDS_BIGENDIAN
+ v = vga_mem_readb(opaque, addr) << 8;
+ v |= vga_mem_readb(opaque, addr + 1);
+#else
+ v = vga_mem_readb(opaque, addr);
+ v |= vga_mem_readb(opaque, addr + 1) << 8;
+#endif
+ return v;
+}
+
+static uint32_t vga_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+ uint32_t v;
+#ifdef TARGET_WORDS_BIGENDIAN
+ v = vga_mem_readb(opaque, addr) << 24;
+ v |= vga_mem_readb(opaque, addr + 1) << 16;
+ v |= vga_mem_readb(opaque, addr + 2) << 8;
+ v |= vga_mem_readb(opaque, addr + 3);
+#else
+ v = vga_mem_readb(opaque, addr);
+ v |= vga_mem_readb(opaque, addr + 1) << 8;
+ v |= vga_mem_readb(opaque, addr + 2) << 16;
+ v |= vga_mem_readb(opaque, addr + 3) << 24;
+#endif
+ return v;
+}
+
+/* called for accesses between 0xa0000 and 0xc0000 */
+void vga_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ VGAState *s = opaque;
+ int memory_map_mode, plane, write_mode, b, func_select, mask;
+ 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;
+ addr &= 0x1ffff;
+ switch(memory_map_mode) {
+ case 0:
+ break;
+ case 1:
+ if (addr >= 0x10000)
+ return;
+ addr += s->bank_offset;
+ break;
+ case 2:
+ addr -= 0x10000;
+ if (addr >= 0x8000)
+ return;
+ break;
+ default:
+ case 3:
+ addr -= 0x18000;
+ if (addr >= 0x8000)
+ return;
+ break;
+ }
+
+ if (s->sr[4] & 0x08) {
+ /* chain 4 mode : simplest access */
+ plane = addr & 3;
+ mask = (1 << plane);
+ if (s->sr[2] & mask) {
+ s->vram_ptr[addr] = val;
+#ifdef DEBUG_VGA_MEM
+ printf("vga: chain4: [0x%x]\n", addr);
+#endif
+ s->plane_updated |= mask; /* only used to detect font change */
+ cpu_physical_memory_set_dirty(s->vram_offset + addr);
+ }
+ } else if (s->gr[5] & 0x10) {
+ /* odd/even mode (aka text mode mapping) */
+ plane = (s->gr[4] & 2) | (addr & 1);
+ mask = (1 << plane);
+ if (s->sr[2] & mask) {
+ addr = ((addr & ~1) << 1) | plane;
+ s->vram_ptr[addr] = val;
+#ifdef DEBUG_VGA_MEM
+ printf("vga: odd/even: [0x%x]\n", addr);
+#endif
+ s->plane_updated |= mask; /* only used to detect font change */
+ cpu_physical_memory_set_dirty(s->vram_offset + addr);
+ }
+ } 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] */
+ mask = s->sr[2];
+ s->plane_updated |= mask; /* only used to detect font change */
+ write_mask = mask16[mask];
+ ((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
+ cpu_physical_memory_set_dirty(s->vram_offset + (addr << 2));
+ }
+}
+
+static void vga_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+#ifdef TARGET_WORDS_BIGENDIAN
+ vga_mem_writeb(opaque, addr, (val >> 8) & 0xff);
+ vga_mem_writeb(opaque, addr + 1, val & 0xff);
+#else
+ vga_mem_writeb(opaque, addr, val & 0xff);
+ vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+#endif
+}
+
+static void vga_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+#ifdef TARGET_WORDS_BIGENDIAN
+ vga_mem_writeb(opaque, addr, (val >> 24) & 0xff);
+ vga_mem_writeb(opaque, addr + 1, (val >> 16) & 0xff);
+ vga_mem_writeb(opaque, addr + 2, (val >> 8) & 0xff);
+ vga_mem_writeb(opaque, addr + 3, val & 0xff);
+#else
+ vga_mem_writeb(opaque, addr, val & 0xff);
+ vga_mem_writeb(opaque, addr + 1, (val >> 8) & 0xff);
+ vga_mem_writeb(opaque, addr + 2, (val >> 16) & 0xff);
+ vga_mem_writeb(opaque, addr + 3, (val >> 24) & 0xff);
+#endif
+}
+
+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)
+{
+ return ((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6);
+}
+
+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;
+}
+
+static inline unsigned int rgb_to_pixel32bgr(unsigned int r, unsigned int g, unsigned b)
+{
+ return (b << 16) | (g << 8) | r;
+}
+
+#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"
+
+#define BGR_FORMAT
+#define DEPTH 32
+#include "vga_template.h"
+
+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;
+}
+
+static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
+{
+ unsigned int col;
+ col = rgb_to_pixel32bgr(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;
+}
+
+static void vga_get_offsets(VGAState *s,
+ uint32_t *pline_offset,
+ uint32_t *pstart_addr)
+{
+ uint32_t start_addr, line_offset;
+#ifdef CONFIG_BOCHS_VBE
+ if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
+ line_offset = s->vbe_line_offset;
+ start_addr = s->vbe_start_addr;
+ } else
+#endif
+ {
+ /* compute line_offset in bytes */
+ line_offset = s->cr[0x13];
+ line_offset <<= 3;
+
+ /* starting address */
+ start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8);
+ }
+ *pline_offset = line_offset;
+ *pstart_addr = start_addr;
+}
+
+/* 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;
+
+ full_update = 0;
+
+ s->get_offsets(s, &line_offset, &start_addr);
+ /* 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;
+}
+
+#define NB_DEPTHS 5
+
+static inline int get_depth_index(DisplayState *s)
+{
+ switch(s->depth) {
+ default:
+ case 8:
+ return 0;
+ case 15:
+ return 1;
+ case 16:
+ return 2;
+ case 32:
+ if (s->bgr)
+ return 4;
+ else
+ return 3;
+ }
+}
+
+static vga_draw_glyph8_func *vga_draw_glyph8_table[NB_DEPTHS] = {
+ vga_draw_glyph8_8,
+ vga_draw_glyph8_16,
+ vga_draw_glyph8_16,
+ vga_draw_glyph8_32,
+ vga_draw_glyph8_32,
+};
+
+static vga_draw_glyph8_func *vga_draw_glyph16_table[NB_DEPTHS] = {
+ vga_draw_glyph16_8,
+ vga_draw_glyph16_16,
+ vga_draw_glyph16_16,
+ vga_draw_glyph16_32,
+ vga_draw_glyph16_32,
+};
+
+static vga_draw_glyph9_func *vga_draw_glyph9_table[NB_DEPTHS] = {
+ vga_draw_glyph9_8,
+ vga_draw_glyph9_16,
+ vga_draw_glyph9_16,
+ vga_draw_glyph9_32,
+ 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 >> 4) & 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 >> 5) & 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;
+ }
+ if (s->plane_updated & (1 << 2)) {
+ /* if the plane 2 was modified since the last display, it
+ indicates the font may have been modified */
+ s->plane_updated = 0;
+ 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 ((height * width) > CH_ATTR_SIZE) {
+ /* better than nothing: exit if transient size is too big */
+ return;
+ }
+
+ if (width != s->last_width || height != s->last_height ||
+ cw != s->last_cw || cheight != s->last_ch) {
+ s->last_scr_width = width * cw;
+ s->last_scr_height = height * cheight;
+ dpy_resize(s->ds, s->last_scr_width, s->last_scr_height);
+ 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);
+ 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_LINE24,
+ VGA_DRAW_LINE32,
+ VGA_DRAW_LINE_NB,
+};
+
+static vga_draw_line_func *vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
+ vga_draw_line2_8,
+ vga_draw_line2_16,
+ vga_draw_line2_16,
+ vga_draw_line2_32,
+ vga_draw_line2_32,
+
+ vga_draw_line2d2_8,
+ vga_draw_line2d2_16,
+ vga_draw_line2d2_16,
+ vga_draw_line2d2_32,
+ vga_draw_line2d2_32,
+
+ vga_draw_line4_8,
+ vga_draw_line4_16,
+ vga_draw_line4_16,
+ vga_draw_line4_32,
+ vga_draw_line4_32,
+
+ vga_draw_line4d2_8,
+ vga_draw_line4d2_16,
+ vga_draw_line4d2_16,
+ vga_draw_line4d2_32,
+ vga_draw_line4d2_32,
+
+ vga_draw_line8d2_8,
+ vga_draw_line8d2_16,
+ vga_draw_line8d2_16,
+ vga_draw_line8d2_32,
+ vga_draw_line8d2_32,
+
+ vga_draw_line8_8,
+ vga_draw_line8_16,
+ vga_draw_line8_16,
+ vga_draw_line8_32,
+ vga_draw_line8_32,
+
+ vga_draw_line15_8,
+ vga_draw_line15_15,
+ vga_draw_line15_16,
+ vga_draw_line15_32,
+ vga_draw_line15_32bgr,
+
+ vga_draw_line16_8,
+ vga_draw_line16_15,
+ vga_draw_line16_16,
+ vga_draw_line16_32,
+ vga_draw_line16_32bgr,
+
+ vga_draw_line24_8,
+ vga_draw_line24_15,
+ vga_draw_line24_16,
+ vga_draw_line24_32,
+ vga_draw_line24_32bgr,
+
+ vga_draw_line32_8,
+ vga_draw_line32_15,
+ vga_draw_line32_16,
+ vga_draw_line32_32,
+ vga_draw_line32_32bgr,
+};
+
+typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
+
+static rgb_to_pixel_dup_func *rgb_to_pixel_dup_table[NB_DEPTHS] = {
+ rgb_to_pixel8_dup,
+ rgb_to_pixel15_dup,
+ rgb_to_pixel16_dup,
+ rgb_to_pixel32_dup,
+ rgb_to_pixel32bgr_dup,
+};
+
+static int vga_get_bpp(VGAState *s)
+{
+ int ret;
+#ifdef CONFIG_BOCHS_VBE
+ if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
+ ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
+ } else
+#endif
+ {
+ ret = 0;
+ }
+ return ret;
+}
+
+static void vga_get_resolution(VGAState *s, int *pwidth, int *pheight)
+{
+ int width, height;
+
+#ifdef CONFIG_BOCHS_VBE
+ if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
+ width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
+ height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
+ } else
+#endif
+ {
+ width = (s->cr[0x01] + 1) * 8;
+ height = s->cr[0x12] |
+ ((s->cr[0x07] & 0x02) << 7) |
+ ((s->cr[0x07] & 0x40) << 3);
+ height = (height + 1);
+ }
+ *pwidth = width;
+ *pheight = height;
+}
+
+void vga_invalidate_scanlines(VGAState *s, int y1, int y2)
+{
+ int y;
+ if (y1 >= VGA_MAX_HEIGHT)
+ return;
+ if (y2 >= VGA_MAX_HEIGHT)
+ y2 = VGA_MAX_HEIGHT;
+ for(y = y1; y < y2; y++) {
+ s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
+ }
+}
+
+/*
+ * graphic modes
+ */
+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);
+
+ s->get_resolution(s, &width, &height);
+ disp_width = width;
+
+ shift_control = (s->gr[0x05] >> 5) & 3;
+ double_scan = (s->cr[0x09] >> 7);
+ if (shift_control != 1) {
+ multi_scan = (((s->cr[0x09] & 0x1f) + 1) << double_scan) - 1;
+ } else {
+ /* in CGA modes, multi_scan is ignored */
+ /* XXX: is it correct ? */
+ multi_scan = double_scan;
+ }
+ 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 {
+ switch(s->get_bpp(s)) {
+ default:
+ case 0:
+ full_update |= update_palette256(s);
+ v = VGA_DRAW_LINE8D2;
+ break;
+ case 8:
+ full_update |= update_palette256(s);
+ v = VGA_DRAW_LINE8;
+ break;
+ case 15:
+ v = VGA_DRAW_LINE15;
+ break;
+ case 16:
+ v = VGA_DRAW_LINE16;
+ break;
+ case 24:
+ v = VGA_DRAW_LINE24;
+ break;
+ case 32:
+ v = VGA_DRAW_LINE32;
+ break;
+ }
+ }
+ vga_draw_line = vga_draw_line_table[v * NB_DEPTHS + get_depth_index(s->ds)];
+
+ if (disp_width != s->last_width ||
+ height != s->last_height) {
+ dpy_resize(s->ds, disp_width, height);
+ s->last_scr_width = disp_width;
+ s->last_scr_height = height;
+ s->last_width = disp_width;
+ s->last_height = height;
+ full_update = 1;
+ }
+ if (s->cursor_invalidate)
+ s->cursor_invalidate(s);
+
+ line_offset = s->line_offset;
+#if 0
+ printf("w=%d h=%d v=%d line_offset=%d cr[0x09]=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=0x%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 = s->vram_offset + (addr & TARGET_PAGE_MASK);
+ page1 = s->vram_offset + ((addr + bwidth - 1) & TARGET_PAGE_MASK);
+ update = full_update |
+ cpu_physical_memory_get_dirty(page0, VGA_DIRTY_FLAG) |
+ cpu_physical_memory_get_dirty(page1, VGA_DIRTY_FLAG);
+ if ((page1 - page0) > TARGET_PAGE_SIZE) {
+ /* if wide line, can use another page */
+ update |= cpu_physical_memory_get_dirty(page0 + TARGET_PAGE_SIZE,
+ VGA_DIRTY_FLAG);
+ }
+ /* explicit invalidation for the hardware cursor */
+ update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 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);
+ if (s->cursor_draw_line)
+ s->cursor_draw_line(s, d, y);
+ } 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) {
+ mask = (s->cr[0x17] & 3) ^ 3;
+ if ((y1 & mask) == mask)
+ addr1 += line_offset;
+ y1++;
+ multi_run = multi_scan;
+ } else {
+ multi_run--;
+ }
+ /* line compare acts on the displayed lines */
+ if (y == s->line_compare)
+ addr1 = 0;
+ 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) {
+ cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
+ VGA_DIRTY_FLAG);
+ }
+ memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
+}
+
+static void vga_draw_blank(VGAState *s, int full_update)
+{
+ int i, w, val;
+ uint8_t *d;
+
+ if (!full_update)
+ return;
+ if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
+ return;
+ if (s->ds->depth == 8)
+ val = s->rgb_to_pixel(0, 0, 0);
+ else
+ val = 0;
+ w = s->last_scr_width * ((s->ds->depth + 7) >> 3);
+ d = s->ds->data;
+ for(i = 0; i < s->last_scr_height; i++) {
+ memset(d, val, w);
+ d += s->ds->linesize;
+ }
+ dpy_update(s->ds, 0, 0,
+ s->last_scr_width, s->last_scr_height);
+}
+
+#define GMODE_TEXT 0
+#define GMODE_GRAPH 1
+#define GMODE_BLANK 2
+
+static void vga_update_display(void *opaque)
+{
+ VGAState *s = (VGAState *)opaque;
+ int full_update, graphic_mode;
+
+ if (s->ds->depth == 0) {
+ /* nothing to do */
+ } else {
+ s->rgb_to_pixel =
+ rgb_to_pixel_dup_table[get_depth_index(s->ds)];
+
+ full_update = 0;
+ if (!(s->ar_index & 0x20)) {
+ graphic_mode = GMODE_BLANK;
+ } else {
+ graphic_mode = s->gr[6] & 1;
+ }
+ if (graphic_mode != s->graphic_mode) {
+ s->graphic_mode = graphic_mode;
+ full_update = 1;
+ }
+ switch(graphic_mode) {
+ case GMODE_TEXT:
+ vga_draw_text(s, full_update);
+ break;
+ case GMODE_GRAPH:
+ vga_draw_graphic(s, full_update);
+ break;
+ case GMODE_BLANK:
+ default:
+ vga_draw_blank(s, full_update);
+ break;
+ }
+ }
+}
+
+/* force a full display refresh */
+static void vga_invalidate_display(void *opaque)
+{
+ VGAState *s = (VGAState *)opaque;
+
+ s->last_width = -1;
+ s->last_height = -1;
+}
+
+static void vga_reset(VGAState *s)
+{
+ memset(s, 0, sizeof(VGAState));
+ s->graphic_mode = -1; /* force full update */
+}
+
+static CPUReadMemoryFunc *vga_mem_read[3] = {
+ vga_mem_readb,
+ vga_mem_readw,
+ vga_mem_readl,
+};
+
+static CPUWriteMemoryFunc *vga_mem_write[3] = {
+ vga_mem_writeb,
+ vga_mem_writew,
+ vga_mem_writel,
+};
+
+static void vga_save(QEMUFile *f, void *opaque)
+{
+ VGAState *s = opaque;
+ int i;
+
+ qemu_put_be32s(f, &s->latch);
+ qemu_put_8s(f, &s->sr_index);
+ qemu_put_buffer(f, s->sr, 8);
+ qemu_put_8s(f, &s->gr_index);
+ qemu_put_buffer(f, s->gr, 16);
+ qemu_put_8s(f, &s->ar_index);
+ qemu_put_buffer(f, s->ar, 21);
+ qemu_put_be32s(f, &s->ar_flip_flop);
+ qemu_put_8s(f, &s->cr_index);
+ qemu_put_buffer(f, s->cr, 256);
+ qemu_put_8s(f, &s->msr);
+ qemu_put_8s(f, &s->fcr);
+ qemu_put_8s(f, &s->st00);
+ qemu_put_8s(f, &s->st01);
+
+ qemu_put_8s(f, &s->dac_state);
+ qemu_put_8s(f, &s->dac_sub_index);
+ qemu_put_8s(f, &s->dac_read_index);
+ qemu_put_8s(f, &s->dac_write_index);
+ qemu_put_buffer(f, s->dac_cache, 3);
+ qemu_put_buffer(f, s->palette, 768);
+
+ qemu_put_be32s(f, &s->bank_offset);
+#ifdef CONFIG_BOCHS_VBE
+ qemu_put_byte(f, 1);
+ qemu_put_be16s(f, &s->vbe_index);
+ for(i = 0; i < VBE_DISPI_INDEX_NB; i++)
+ qemu_put_be16s(f, &s->vbe_regs[i]);
+ qemu_put_be32s(f, &s->vbe_start_addr);
+ qemu_put_be32s(f, &s->vbe_line_offset);
+ qemu_put_be32s(f, &s->vbe_bank_mask);
+#else
+ qemu_put_byte(f, 0);
+#endif
+}
+
+static int vga_load(QEMUFile *f, void *opaque, int version_id)
+{
+ VGAState *s = opaque;
+ int is_vbe, i;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ qemu_get_be32s(f, &s->latch);
+ qemu_get_8s(f, &s->sr_index);
+ qemu_get_buffer(f, s->sr, 8);
+ qemu_get_8s(f, &s->gr_index);
+ qemu_get_buffer(f, s->gr, 16);
+ qemu_get_8s(f, &s->ar_index);
+ qemu_get_buffer(f, s->ar, 21);
+ qemu_get_be32s(f, &s->ar_flip_flop);
+ qemu_get_8s(f, &s->cr_index);
+ qemu_get_buffer(f, s->cr, 256);
+ qemu_get_8s(f, &s->msr);
+ qemu_get_8s(f, &s->fcr);
+ qemu_get_8s(f, &s->st00);
+ qemu_get_8s(f, &s->st01);
+
+ qemu_get_8s(f, &s->dac_state);
+ qemu_get_8s(f, &s->dac_sub_index);
+ qemu_get_8s(f, &s->dac_read_index);
+ qemu_get_8s(f, &s->dac_write_index);
+ qemu_get_buffer(f, s->dac_cache, 3);
+ qemu_get_buffer(f, s->palette, 768);
+
+ qemu_get_be32s(f, &s->bank_offset);
+ is_vbe = qemu_get_byte(f);
+#ifdef CONFIG_BOCHS_VBE
+ if (!is_vbe)
+ return -EINVAL;
+ qemu_get_be16s(f, &s->vbe_index);
+ for(i = 0; i < VBE_DISPI_INDEX_NB; i++)
+ qemu_get_be16s(f, &s->vbe_regs[i]);
+ qemu_get_be32s(f, &s->vbe_start_addr);
+ qemu_get_be32s(f, &s->vbe_line_offset);
+ qemu_get_be32s(f, &s->vbe_bank_mask);
+#else
+ if (is_vbe)
+ return -EINVAL;
+#endif
+
+ /* force refresh */
+ s->graphic_mode = -1;
+ return 0;
+}
+
+static void vga_map(PCIDevice *pci_dev, int region_num,
+ uint32_t addr, uint32_t size, int type)
+{
+ VGAState *s = vga_state;
+ if (region_num == PCI_ROM_SLOT) {
+ cpu_register_physical_memory(addr, s->bios_size, s->bios_offset);
+ } else {
+ cpu_register_physical_memory(addr, s->vram_size, s->vram_offset);
+ }
+}
+
+void vga_common_init(VGAState *s, DisplayState *ds, uint8_t *vga_ram_base,
+ unsigned long vga_ram_offset, int vga_ram_size)
+{
+ 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);
+
+ s->vram_ptr = vga_ram_base;
+ s->vram_offset = vga_ram_offset;
+ s->vram_size = vga_ram_size;
+ s->ds = ds;
+ s->get_bpp = vga_get_bpp;
+ s->get_offsets = vga_get_offsets;
+ s->get_resolution = vga_get_resolution;
+ graphic_console_init(s->ds, vga_update_display, vga_invalidate_display,
+ vga_screen_dump, s);
+ /* XXX: currently needed for display */
+ vga_state = s;
+}
+
+
+int vga_initialize(PCIBus *bus, DisplayState *ds, uint8_t *vga_ram_base,
+ unsigned long vga_ram_offset, int vga_ram_size,
+ unsigned long vga_bios_offset, int vga_bios_size)
+{
+ VGAState *s;
+
+ s = qemu_mallocz(sizeof(VGAState));
+ if (!s)
+ return -1;
+
+ vga_common_init(s, ds, vga_ram_base, vga_ram_offset, vga_ram_size);
+
+ register_savevm("vga", 0, 1, vga_save, vga_load, s);
+
+ register_ioport_write(0x3c0, 16, 1, vga_ioport_write, s);
+
+ register_ioport_write(0x3b4, 2, 1, vga_ioport_write, s);
+ register_ioport_write(0x3d4, 2, 1, vga_ioport_write, s);
+ register_ioport_write(0x3ba, 1, 1, vga_ioport_write, s);
+ register_ioport_write(0x3da, 1, 1, vga_ioport_write, s);
+
+ register_ioport_read(0x3c0, 16, 1, vga_ioport_read, s);
+
+ register_ioport_read(0x3b4, 2, 1, vga_ioport_read, s);
+ register_ioport_read(0x3d4, 2, 1, vga_ioport_read, s);
+ register_ioport_read(0x3ba, 1, 1, vga_ioport_read, s);
+ register_ioport_read(0x3da, 1, 1, vga_ioport_read, s);
+ s->bank_offset = 0;
+
+#ifdef CONFIG_BOCHS_VBE
+ s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID0;
+ s->vbe_bank_mask = ((s->vram_size >> 16) - 1);
+#if defined (TARGET_I386)
+ register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
+ register_ioport_read(0x1cf, 1, 2, vbe_ioport_read_data, s);
+
+ register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
+ register_ioport_write(0x1cf, 1, 2, vbe_ioport_write_data, s);
+
+ /* old Bochs IO ports */
+ register_ioport_read(0xff80, 1, 2, vbe_ioport_read_index, s);
+ register_ioport_read(0xff81, 1, 2, vbe_ioport_read_data, s);
+
+ register_ioport_write(0xff80, 1, 2, vbe_ioport_write_index, s);
+ register_ioport_write(0xff81, 1, 2, vbe_ioport_write_data, s);
+#else
+ register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
+ register_ioport_read(0x1d0, 1, 2, vbe_ioport_read_data, s);
+
+ register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
+ register_ioport_write(0x1d0, 1, 2, vbe_ioport_write_data, s);
+#endif
+#endif /* CONFIG_BOCHS_VBE */
+
+ vga_io_memory = cpu_register_io_memory(0, vga_mem_read, vga_mem_write, s);
+ cpu_register_physical_memory(isa_mem_base + 0x000a0000, 0x20000,
+ vga_io_memory);
+
+ if (bus) {
+ PCIDevice *d;
+ uint8_t *pci_conf;
+
+ d = pci_register_device(bus, "VGA",
+ sizeof(PCIDevice),
+ -1, NULL, NULL);
+ pci_conf = d->config;
+ pci_conf[0x00] = 0x34; // dummy VGA (same as Bochs ID)
+ pci_conf[0x01] = 0x12;
+ pci_conf[0x02] = 0x11;
+ pci_conf[0x03] = 0x11;
+ pci_conf[0x0a] = 0x00; // VGA controller
+ pci_conf[0x0b] = 0x03;
+ pci_conf[0x0e] = 0x00; // header_type
+
+ /* XXX: vga_ram_size must be a power of two */
+ pci_register_io_region(d, 0, vga_ram_size,
+ PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
+ if (vga_bios_size != 0) {
+ unsigned int bios_total_size;
+ s->bios_offset = vga_bios_offset;
+ s->bios_size = vga_bios_size;
+ /* must be a power of two */
+ bios_total_size = 1;
+ while (bios_total_size < vga_bios_size)
+ bios_total_size <<= 1;
+ pci_register_io_region(d, PCI_ROM_SLOT, bios_total_size,
+ PCI_ADDRESS_SPACE_MEM_PREFETCH, vga_map);
+ }
+ } else {
+#ifdef CONFIG_BOCHS_VBE
+ /* XXX: use optimized standard vga accesses */
+ cpu_register_physical_memory(VBE_DISPI_LFB_PHYSICAL_ADDRESS,
+ vga_ram_size, vga_ram_offset);
+#endif
+ }
+ return 0;
+}
+
+/********************************************************/
+/* vga screen dump */
+
+static int vga_save_w, vga_save_h;
+
+static void vga_save_dpy_update(DisplayState *s,
+ int x, int y, int w, int h)
+{
+}
+
+static void vga_save_dpy_resize(DisplayState *s, int w, int h)
+{
+ s->linesize = w * 4;
+ s->data = qemu_malloc(h * s->linesize);
+ vga_save_w = w;
+ vga_save_h = h;
+}
+
+static void vga_save_dpy_refresh(DisplayState *s)
+{
+}
+
+static int ppm_save(const char *filename, uint8_t *data,
+ int w, int h, int linesize)
+{
+ FILE *f;
+ uint8_t *d, *d1;
+ unsigned int v;
+ int y, x;
+
+ f = fopen(filename, "wb");
+ if (!f)
+ return -1;
+ fprintf(f, "P6\n%d %d\n%d\n",
+ w, h, 255);
+ d1 = data;
+ for(y = 0; y < h; y++) {
+ d = d1;
+ for(x = 0; x < w; x++) {
+ v = *(uint32_t *)d;
+ fputc((v >> 16) & 0xff, f);
+ fputc((v >> 8) & 0xff, f);
+ fputc((v) & 0xff, f);
+ d += 4;
+ }
+ d1 += linesize;
+ }
+ fclose(f);
+ return 0;
+}
+
+/* save the vga display in a PPM image even if no display is
+ available */
+static void vga_screen_dump(void *opaque, const char *filename)
+{
+ VGAState *s = (VGAState *)opaque;
+ DisplayState *saved_ds, ds1, *ds = &ds1;
+
+ /* XXX: this is a little hackish */
+ vga_invalidate_display(s);
+ saved_ds = s->ds;
+
+ memset(ds, 0, sizeof(DisplayState));
+ ds->dpy_update = vga_save_dpy_update;
+ ds->dpy_resize = vga_save_dpy_resize;
+ ds->dpy_refresh = vga_save_dpy_refresh;
+ ds->depth = 32;
+
+ s->ds = ds;
+ s->graphic_mode = -1;
+ vga_update_display(s);
+
+ if (ds->data) {
+ ppm_save(filename, ds->data, vga_save_w, vga_save_h,
+ s->ds->linesize);
+ qemu_free(ds->data);
+ }
+ s->ds = saved_ds;
+}
generated by cgit v1.1 at 2024-05-20 21:41:42 +0000