Author: marcel
Date: Thu Aug 13 14:43:11 2015
New Revision: 286723
URL: https://svnweb.freebsd.org/changeset/base/286723
Log:
Fix text mode operation.
We first map 64KB at 0xA0000 and then determine whether to work
in text or graphics mode. When graphics mode, the mapping is
precisely what we need and everything is fine. But text mode,
has the frame buffer relocated to 0xB8000. We didn't map that
much to safely add 0x18000 bytes to the base address.
Now we first check whether to work in text or graphics mode and
then map the frame buffer at the right address and with the
right size (0xA0000+64KB for graphics, 0xB8000+32KB for text).
PR: 202276
Tested by: ed@
Modified:
head/sys/dev/vt/hw/vga/vt_vga.c
head/sys/dev/vt/hw/vga/vt_vga_reg.h
Modified: head/sys/dev/vt/hw/vga/vt_vga.c
==============================================================================
--- head/sys/dev/vt/hw/vga/vt_vga.c Thu Aug 13 13:38:09 2015
(r286722)
+++ head/sys/dev/vt/hw/vga/vt_vga.c Thu Aug 13 14:43:11 2015
(r286723)
@@ -883,9 +883,9 @@ vga_bitblt_text_txtmode(struct vt_device
/* Convert colors to VGA attributes. */
attr = bg << 4 | fg;
- MEM_WRITE1(sc, 0x18000 + (row * 80 + col) * 2 + 0,
+ MEM_WRITE1(sc, (row * 80 + col) * 2 + 0,
ch);
- MEM_WRITE1(sc, 0x18000 + (row * 80 + col) * 2 + 1,
+ MEM_WRITE1(sc, (row * 80 + col) * 2 + 1,
attr);
}
}
@@ -1226,8 +1226,6 @@ vga_init(struct vt_device *vd)
# error "Architecture not yet supported!"
#endif
- bus_space_map(sc->vga_fb_tag, VGA_MEM_BASE, VGA_MEM_SIZE, 0,
- &sc->vga_fb_handle);
bus_space_map(sc->vga_reg_tag, VGA_REG_BASE, VGA_REG_SIZE, 0,
&sc->vga_reg_handle);
@@ -1236,9 +1234,13 @@ vga_init(struct vt_device *vd)
vd->vd_flags |= VDF_TEXTMODE;
vd->vd_width = 80;
vd->vd_height = 25;
+ bus_space_map(sc->vga_fb_tag, VGA_TXT_BASE, VGA_TXT_SIZE, 0,
+ &sc->vga_fb_handle);
} else {
vd->vd_width = VT_VGA_WIDTH;
vd->vd_height = VT_VGA_HEIGHT;
+ bus_space_map(sc->vga_fb_tag, VGA_MEM_BASE, VGA_MEM_SIZE, 0,
+ &sc->vga_fb_handle);
}
if (vga_initialize(vd, textmode) != 0)
return (CN_DEAD);
Modified: head/sys/dev/vt/hw/vga/vt_vga_reg.h
==============================================================================
--- head/sys/dev/vt/hw/vga/vt_vga_reg.h Thu Aug 13 13:38:09 2015
(r286722)
+++ head/sys/dev/vt/hw/vga/vt_vga_reg.h Thu Aug 13 14:43:11 2015
(r286723)
@@ -49,6 +49,8 @@
#define VGA_MEM_BASE 0xA0000
#define VGA_MEM_SIZE 0x10000
+#define VGA_TXT_BASE 0xB8000
+#define VGA_TXT_SIZE 0x08000
#define VGA_REG_BASE 0x3c0
#define VGA_REG_SIZE 0x10+0x0c
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