d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix text mode operation.

Browse Source 
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@
This commit is contained in:
Marcel Moolenaar 2015-08-13 14:43:11 +00:00
parent f3bfa7d1cf
commit 6280434f9a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=286723
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sys/dev/vt/hw/vga/vt_vga.c
View File

@ -883,9 +883,9 @@ vga_bitblt_text_txtmode(struct vt_device *vd, const struct vt_window *vw,
/* 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);

2
sys/dev/vt/hw/vga/vt_vga_reg.h
View File

@ -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