\
sys/vesacon_write.o sys/vesaserial_write.o \
sys/vesa/initvesa.o sys/vesa/drawtxt.o sys/vesa/background.o \
- sys/vesa/alphatbl.o \
+ sys/vesa/alphatbl.o sys/vesa/screencpy.o \
\
pci/cfgtype.o pci/scan.o \
pci/readb.o pci/readw.o pci/readl.o pci/readbios.o \
while (npixels--)
lbp = format_pixel(lbp, *bgptr++, pixel_format);
- memcpy(fbptr, line_buf, lbp-line_buf);
+ __vesacon_copy_to_screen(fbptr, line_buf, lbp-line_buf);
}
/* This draws the border, then redraws the text area */
/* Copy to frame buffer */
/* Note that the dword_count is rounded down, not up. That's because
the row_buffer includes a spillover pixel. */
- copy_dword(fbrowptr, row_buffer, (rowbufptr-row_buffer) >> 2);
+ __vesacon_copy_to_screen(fbrowptr, row_buffer,
+ (rowbufptr-row_buffer) & ~3);
bgrowptr += VIDEO_X_SIZE;
fbrowptr += __vesa_info.mi.logical_scan;
}
}
+static int __constfunc is_power_of_2(unsigned int x)
+{
+ return x && !(x & (x-1));
+}
+
+static int vesacon_paged_mode_ok(const struct vesa_mode_info *mi)
+{
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ if ((mi->win_attr[i] & 0x05) == 0x05 &&
+ mi->win_seg[i] &&
+ is_power_of_2(mi->win_size) &&
+ is_power_of_2(mi->win_grain) &&
+ mi->win_grain <= mi->win_size)
+ return 1; /* We can deal with this... */
+ }
+
+ return 0; /* Nope... */
+}
+
static int vesacon_set_mode(void)
{
com32sys_t rm;
return 1; /* Function call failed */
if ( gi->signature != VESA_MAGIC )
return 2; /* No magic */
-#if 1
- /* Linear frame buffer is a VBE 2.0 feature. In theory this
- test is redundant given that we check the bitmasks. */
- if ( gi->version < 0x0200 ) {
- return 3; /* VESA 2.0 not supported */
- }
-#endif
+ if ( gi->version < 0x0102 )
+ return 3; /* VESA 1.2+ required */
/* Copy general info */
memcpy(&__vesa_info.gi, gi, sizeof *gi);
bestpxf = PXF_NONE;
while ((mode = *mode_ptr++) != 0xFFFF) {
+ mode &= 0x1FF; /* The rest are attributes of sorts */
+
debug("Found mode: 0x%04x\r\n", mode);
memset(mi, 0, sizeof *mi);
/* Must be an LFB color graphics mode supported by the hardware.
The bits tested are:
- 7 - linear frame buffer available
4 - graphics mode
3 - color mode
1 - mode information available (mandatory in VBE 1.2+)
0 - mode supported by hardware
*/
- if ( (mi->mode_attr & 0x009b) != 0x009b )
+ if ( (mi->mode_attr & 0x001b) != 0x001b )
continue;
/* Must be 640x480 */
if ( mi->h_res != VIDEO_X_SIZE || mi->v_res != VIDEO_Y_SIZE )
continue;
+ /* We don't support multibank (interlaced memory) modes */
+ if ( mi->banks > 1 )
+ continue;
+
+ /* Must be either a flat-framebuffer mode, or be an acceptable
+ paged mode */
+ if ( !(mi->mode_attr & 0x0080) && !vesacon_paged_mode_ok(mi) )
+ continue;
+
/* Must either be a packed-pixel mode or a direct color mode
- (depending on VESA version ) */
+ (depending on VESA version ); must be a supported pixel format */
pxf = PXF_NONE; /* Not usable */
if (mi->bpp == 32 &&
/* Now set video mode */
rm.eax.w[0] = 0x4F02; /* Set SVGA video mode */
- rm.ebx.w[0] = mode | 0x4000; /* Clear video RAM, use linear fb */
+ if (mi->mode_attr & 0x0080)
+ mode |= 0x4000; /* Request linear framebuffer if supported */
+ rm.ebx.w[0] = mode;
__intcall(0x10, &rm, &rm);
if ( rm.eax.w[0] != 0x004F )
return 9; /* Failed to set mode */
+ __vesacon_init_copy_to_screen();
+
/* Tell syslinux we changed video mode */
rm.eax.w[0] = 0x0017; /* Report video mode change */
/* In theory this should be:
--- /dev/null
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2008 H. Peter Anvin - All Rights Reserved
+ *
+ * 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 <inttypes.h>
+#include <minmax.h>
+#include <klibc/compiler.h>
+#include <string.h>
+#include <com32.h>
+#include "vesa.h"
+#include "video.h"
+
+static struct win_info {
+ char *win_base;
+ size_t win_pos;
+ size_t win_size;
+ int win_gshift;
+ int win_num;
+} wi;
+
+static void *
+vesacon_copy_to_paged_screen(void *dst, const void *src, size_t len);
+
+static inline int __constfunc ilog2(unsigned int x)
+{
+ asm("bsrl %1,%0" : "=r" (x) : "rm" (x));
+ return x;
+}
+
+void __vesacon_init_copy_to_screen(void)
+{
+ struct vesa_mode_info * const mi = &__vesa_info.mi;
+ int winn;
+
+ if (mi->mode_attr & 0x0080) {
+ __vesacon_copy_to_screen = memcpy; /* Really easy... */
+ } else {
+ __vesacon_copy_to_screen = vesacon_copy_to_paged_screen;
+
+ mi->lfb_ptr = 0; /* Zero-base this */
+ wi.win_pos = -1; /* Undefined position */
+
+ /* We have already tested that *one* of these is usable */
+ if ((mi->win_attr[0] & 0x05) == 0x05 && mi->win_seg[0])
+ winn = 0;
+ else
+ winn = 1;
+
+ wi.win_num = winn;
+ wi.win_base = (char *)(mi->win_seg[winn] << 4);
+ wi.win_size = mi->win_size << 10;
+ wi.win_gshift = ilog2(mi->win_grain) + 10;
+ }
+}
+
+static void *
+vesacon_copy_to_paged_screen(void *dst, const void *src, size_t len)
+{
+ size_t win_pos, win_off;
+ size_t win_size = wi.win_size;
+ size_t omask = win_size - 1;
+ char *win_base = wi.win_base;
+ size_t l;
+ size_t d = (size_t)dst;
+ const char *s = src;
+ com32sys_t ireg;
+
+ memset(&ireg, 0, sizeof ireg);
+ ireg.eax.w[0] = 0x4F05; /* VBE Window Control */
+ /* BH = 0 -> Set memory window */
+ ireg.ebx.b[0] = wi.win_num;
+
+ while (len) {
+ win_off = d & omask;
+ win_pos = d & ~omask;
+
+ if (win_pos != wi.win_pos) {
+ ireg.edx.w[0] = win_pos >> wi.win_gshift;
+ __intcall(0x10, &ireg, NULL);
+ wi.win_pos = win_pos;
+ }
+
+ l = min(len, win_size - win_off);
+ memcpy(win_base + win_off, s, l);
+
+ len -= l;
+ s += l;
+ d += l;
+ }
+
+ return dst;
+}
void __vesacon_redraw_text(void);
void __vesacon_doit(void);
void __vesacon_set_cursor(int, int, int);
+void * (*__vesacon_copy_to_screen)(void *, const void *, size_t);
+void __vesacon_init_copy_to_screen(void);
#endif /* LIB_SYS_VESA_VIDEO_H */
projects / profile / ivi / syslinux.git / commitdiff