aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/hw/kdrive/vesa/vga.c
diff options
context:
space:
mode:
Diffstat (limited to 'xorg-server/hw/kdrive/vesa/vga.c')
-rw-r--r--xorg-server/hw/kdrive/vesa/vga.c242
1 files changed, 242 insertions, 0 deletions
diff --git a/xorg-server/hw/kdrive/vesa/vga.c b/xorg-server/hw/kdrive/vesa/vga.c
new file mode 100644
index 000000000..0367a5f06
--- /dev/null
+++ b/xorg-server/hw/kdrive/vesa/vga.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright © 2000 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <kdrive-config.h>
+#endif
+#include "vesa.h"
+
+static const VesaModeRec vgaModes[] = {
+ {
+ 6, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_LINEAR,
+ 1, 1, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 640, 200, 80,
+ },
+ {
+ 0xd, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
+ 4, 4, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 320, 200, 40,
+ },
+ {
+ 0xe, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
+ 4, 4, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 640, 200, 80,
+ },
+ {
+ 0x10, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
+ 4, 4, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 640, 350, 80,
+ },
+ {
+ 0x11, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_LINEAR,
+ 1, 1, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 640, 480, 80,
+ },
+ {
+ 0x12, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
+ 4, 4, MEMORY_PLANAR,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 640, 480, 80,
+ },
+ {
+ 0x13, 0,
+ MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR | MODE_LINEAR,
+ 8, 8, MEMORY_PSEUDO,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 320, 200, 320,
+ },
+};
+
+#define NUM_VGA_MODE (sizeof vgaModes / sizeof vgaModes[0])
+
+int
+VgaGetNmode (Vm86InfoPtr vi)
+{
+ return NUM_VGA_MODE;
+}
+
+int
+VgaGetModes (Vm86InfoPtr vi, VesaModePtr mode, int nmode)
+{
+ if (nmode > NUM_VGA_MODE)
+ nmode = NUM_VGA_MODE;
+ memcpy (mode, vgaModes, nmode * sizeof (VesaModeRec));
+ return nmode;
+}
+
+int
+VgaSetMode(Vm86InfoPtr vi, int mode)
+{
+ int code;
+
+ vi->vms.regs.eax = mode & 0x7f;
+ code = Vm86DoInterrupt (vi, 0x10);
+ if(code < 0)
+ return -1;
+ return 0;
+}
+
+int
+VgaGetMode (Vm86InfoPtr vi, int *mode)
+{
+ *mode = Vm86Memory (vi, 0x449);
+ return 0;
+}
+
+void
+VgaSetWritePlaneMask(Vm86InfoPtr vi, int mask)
+{
+ asm volatile ("outb %b0,%w1" : : "a" (2), "d" (0x3c4));
+ asm volatile ("outb %b0,%w1" : : "a" (mask), "d" (0x3c5));
+}
+
+void
+VgaSetReadPlaneMap(Vm86InfoPtr vi, int map)
+{
+ asm volatile ("outb %b0,%w1" : : "a" (4), "d" (0x3ce));
+ asm volatile ("outb %b0,%w1" : : "a" (map), "d" (0x3cf));
+}
+
+int
+VgaSetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries)
+{
+ U8 *palette_scratch;
+ int mark;
+ int palette_base;
+ int i, j, code;
+
+ if(number == 0)
+ return 0;
+
+ if(first < 0 || number < 0 || first + number > 256) {
+ ErrorF("Cannot set %d, %d palette entries\n", first, number);
+ return -1;
+ }
+
+ mark = Vm86MarkMemory (vi);
+ palette_base = Vm86AllocateMemory (vi, 3 * 256);
+
+ palette_scratch = &LM(vi, palette_base);
+
+ vi->vms.regs.eax = 0x1012;
+ vi->vms.regs.ebx = first;
+ vi->vms.regs.ecx = number;
+ vi->vms.regs.es = POINTER_SEGMENT(palette_base);
+ vi->vms.regs.edx = POINTER_OFFSET(palette_base);
+ j = 0;
+ i = 0;
+ while (number--)
+ {
+ palette_scratch[j++] = entries[i++] >> 2;
+ palette_scratch[j++] = entries[i++] >> 2;
+ palette_scratch[j++] = entries[i++] >> 2;
+ i++;
+ }
+ code = Vm86DoInterrupt(vi, 0x10);
+ Vm86ReleaseMemory (vi, mark);
+
+ if(code < 0)
+ return -1;
+ return 0;
+}
+
+int
+VgaGetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries)
+{
+ U8 *palette_scratch;
+ int mark;
+ int palette_base;
+ int i, j, code;
+
+ if(number == 0)
+ return 0;
+
+ if(first < 0 || number < 0 || first + number > 256) {
+ ErrorF("Cannot get %d, %d palette entries\n", first, number);
+ return -1;
+ }
+
+ mark = Vm86MarkMemory (vi);
+ palette_base = Vm86AllocateMemory (vi, 3 * 256);
+
+ palette_scratch = &LM(vi, palette_base);
+
+ vi->vms.regs.eax = 0x1017;
+ vi->vms.regs.ebx = first;
+ vi->vms.regs.ecx = number;
+ vi->vms.regs.es = POINTER_SEGMENT(palette_base);
+ vi->vms.regs.edx = POINTER_OFFSET(palette_base);
+
+ code = VbeDoInterrupt10(vi);
+ if(code < 0)
+ return -1;
+
+ j = 0;
+ i = 0;
+ while (number--)
+ {
+ entries[i++] = palette_scratch[j++] << 2;
+ entries[i++] = palette_scratch[j++] << 2;
+ entries[i++] = palette_scratch[j++] << 2;
+ entries[i++] = 0;
+ }
+
+ Vm86ReleaseMemory (vi, mark);
+
+ return 0;
+}
+
+#define VGA_FB(vm) ((vm) < 8 ? 0xb8000 : 0xa0000)
+
+void *
+VgaSetWindow (Vm86InfoPtr vi, int vmode, int bytes, int mode, int *size)
+{
+ *size = 0x10000 - bytes;
+ return &LM(vi,VGA_FB(vmode) + bytes);
+}
+
+void *
+VgaMapFramebuffer (Vm86InfoPtr vi, int vmode, int *size, CARD32 *ret_phys)
+{
+ if (VGA_FB(vmode) == 0xa0000)
+ *size = 0x10000;
+ else
+ *size = 0x4000;
+ *ret_phys = VGA_FB(vmode);
+ return &LM(vi,VGA_FB(vmode));
+}
+
+void
+VgaUnmapFramebuffer (Vm86InfoPtr vi)
+{
+}