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support for Bochs VBE GETCAPS call so that -std-vga works again with new VGA BIOSes - added support for modes up to 1600x1200x32 in -std-vga case

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1957 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-06-13 16:37:40 +00:00
parent 99589bdcd1
commit 8454df8b1e
2 changed files with 45 additions and 14 deletions
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50
hw/vga.c
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@ -378,10 +378,29 @@ 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)
val = s->vbe_regs[s->vbe_index];
else
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
@ -434,7 +453,8 @@ static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
s->bank_offset = (val << 16);
break;
case VBE_DISPI_INDEX_ENABLE:
if (val & VBE_DISPI_ENABLED) {
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] =
@ -450,7 +470,7 @@ static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
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,
@ -464,7 +484,7 @@ static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
s->cr[0x13] = s->vbe_line_offset >> 3;
/* width */
s->cr[0x01] = (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
/* height */
/* 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) |
@ -1310,11 +1330,19 @@ static void vga_get_resolution(VGAState *s, int *pwidth, int *pheight)
{
int width, height;
width = (s->cr[0x01] + 1) * 8;
height = s->cr[0x12] |
((s->cr[0x07] & 0x02) << 7) |
((s->cr[0x07] & 0x40) << 3);
height = (height + 1);
#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;
}