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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Clean up vga.c and change default font slot to zero, as other
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID d853acd5ed5865d5326b7884de6b610af814ef41
# Parent 01a4266e4dc9c1ca4a0cefc3f1c8fbe73bbf4e17
Clean up vga.c and change default font slot to zero, as other
slots are not supported by ATI video cards.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
xen/drivers/video/vga.c | 196 ++++++++++++++++++++++++------------------------
xen/include/xen/vga.h | 1
2 files changed, 102 insertions(+), 95 deletions(-)
diff -r 01a4266e4dc9 -r d853acd5ed58 xen/drivers/video/vga.c
--- a/xen/drivers/video/vga.c Tue Aug 15 11:17:36 2006 +0100
+++ b/xen/drivers/video/vga.c Tue Aug 15 11:36:10 2006 +0100
@@ -170,59 +170,59 @@
* generic VGA port read/write
*/
-static inline uint8_t vga_io_r (uint16_t port)
+static inline uint8_t vga_io_r(uint16_t port)
{
return inb(port);
}
-static inline void vga_io_w (uint16_t port, uint8_t val)
+static inline void vga_io_w(uint16_t port, uint8_t val)
{
outb(val, port);
}
-static inline void vga_io_w_fast (uint16_t port, uint8_t reg, uint8_t val)
-{
- outw(VGA_OUT16VAL (val, reg), port);
-}
-
-static inline uint8_t vga_mm_r (void __iomem *regbase, uint16_t port)
-{
- return readb (regbase + port);
-}
-
-static inline void vga_mm_w (void __iomem *regbase, uint16_t port, uint8_t val)
-{
- writeb (val, regbase + port);
-}
-
-static inline void vga_mm_w_fast (void __iomem *regbase, uint16_t port,
uint8_t reg, uint8_t val)
-{
- writew (VGA_OUT16VAL (val, reg), regbase + port);
-}
-
-static inline uint8_t vga_r (void __iomem *regbase, uint16_t port)
+static inline void vga_io_w_fast(uint16_t port, uint8_t reg, uint8_t val)
+{
+ outw(VGA_OUT16VAL(val, reg), port);
+}
+
+static inline uint8_t vga_mm_r(void __iomem *regbase, uint16_t port)
+{
+ return readb(regbase + port);
+}
+
+static inline void vga_mm_w(void __iomem *regbase, uint16_t port, uint8_t val)
+{
+ writeb(val, regbase + port);
+}
+
+static inline void vga_mm_w_fast(void __iomem *regbase, uint16_t port, uint8_t
reg, uint8_t val)
+{
+ writew(VGA_OUT16VAL(val, reg), regbase + port);
+}
+
+static inline uint8_t vga_r(void __iomem *regbase, uint16_t port)
{
if (regbase)
- return vga_mm_r (regbase, port);
+ return vga_mm_r(regbase, port);
else
- return vga_io_r (port);
-}
-
-static inline void vga_w (void __iomem *regbase, uint16_t port, uint8_t val)
+ return vga_io_r(port);
+}
+
+static inline void vga_w(void __iomem *regbase, uint16_t port, uint8_t val)
{
if (regbase)
- vga_mm_w (regbase, port, val);
+ vga_mm_w(regbase, port, val);
else
- vga_io_w (port, val);
-}
-
-
-static inline void vga_w_fast (void __iomem *regbase, uint16_t port, uint8_t
reg, uint8_t val)
+ vga_io_w(port, val);
+}
+
+
+static inline void vga_w_fast(void __iomem *regbase, uint16_t port, uint8_t
reg, uint8_t val)
{
if (regbase)
- vga_mm_w_fast (regbase, port, reg, val);
+ vga_mm_w_fast(regbase, port, reg, val);
else
- vga_io_w_fast (port, reg, val);
+ vga_io_w_fast(port, reg, val);
}
@@ -230,19 +230,19 @@ static inline void vga_w_fast (void __io
* VGA CRTC register read/write
*/
-static inline uint8_t vga_rcrt (void __iomem *regbase, uint8_t reg)
-{
- vga_w (regbase, VGA_CRT_IC, reg);
- return vga_r (regbase, VGA_CRT_DC);
-}
-
-static inline void vga_wcrt (void __iomem *regbase, uint8_t reg, uint8_t val)
+static inline uint8_t vga_rcrt(void __iomem *regbase, uint8_t reg)
+{
+ vga_w(regbase, VGA_CRT_IC, reg);
+ return vga_r(regbase, VGA_CRT_DC);
+}
+
+static inline void vga_wcrt(void __iomem *regbase, uint8_t reg, uint8_t val)
{
#ifdef VGA_OUTW_WRITE
- vga_w_fast (regbase, VGA_CRT_IC, reg, val);
+ vga_w_fast(regbase, VGA_CRT_IC, reg, val);
#else
- vga_w (regbase, VGA_CRT_IC, reg);
- vga_w (regbase, VGA_CRT_DC, val);
+ vga_w(regbase, VGA_CRT_IC, reg);
+ vga_w(regbase, VGA_CRT_DC, val);
#endif /* VGA_OUTW_WRITE */
}
@@ -250,19 +250,19 @@ static inline void vga_wcrt (void __iome
* VGA sequencer register read/write
*/
-static inline uint8_t vga_rseq (void __iomem *regbase, uint8_t reg)
-{
- vga_w (regbase, VGA_SEQ_I, reg);
- return vga_r (regbase, VGA_SEQ_D);
-}
-
-static inline void vga_wseq (void __iomem *regbase, uint8_t reg, uint8_t val)
+static inline uint8_t vga_rseq(void __iomem *regbase, uint8_t reg)
+{
+ vga_w(regbase, VGA_SEQ_I, reg);
+ return vga_r(regbase, VGA_SEQ_D);
+}
+
+static inline void vga_wseq(void __iomem *regbase, uint8_t reg, uint8_t val)
{
#ifdef VGA_OUTW_WRITE
- vga_w_fast (regbase, VGA_SEQ_I, reg, val);
+ vga_w_fast(regbase, VGA_SEQ_I, reg, val);
#else
- vga_w (regbase, VGA_SEQ_I, reg);
- vga_w (regbase, VGA_SEQ_D, val);
+ vga_w(regbase, VGA_SEQ_I, reg);
+ vga_w(regbase, VGA_SEQ_D, val);
#endif /* VGA_OUTW_WRITE */
}
@@ -270,19 +270,19 @@ static inline void vga_wseq (void __iome
* VGA graphics controller register read/write
*/
-static inline uint8_t vga_rgfx (void __iomem *regbase, uint8_t reg)
-{
- vga_w (regbase, VGA_GFX_I, reg);
- return vga_r (regbase, VGA_GFX_D);
-}
-
-static inline void vga_wgfx (void __iomem *regbase, uint8_t reg, uint8_t val)
+static inline uint8_t vga_rgfx(void __iomem *regbase, uint8_t reg)
+{
+ vga_w(regbase, VGA_GFX_I, reg);
+ return vga_r(regbase, VGA_GFX_D);
+}
+
+static inline void vga_wgfx(void __iomem *regbase, uint8_t reg, uint8_t val)
{
#ifdef VGA_OUTW_WRITE
- vga_w_fast (regbase, VGA_GFX_I, reg, val);
+ vga_w_fast(regbase, VGA_GFX_I, reg, val);
#else
- vga_w (regbase, VGA_GFX_I, reg);
- vga_w (regbase, VGA_GFX_D, val);
+ vga_w(regbase, VGA_GFX_I, reg);
+ vga_w(regbase, VGA_GFX_D, val);
#endif /* VGA_OUTW_WRITE */
}
@@ -290,16 +290,16 @@ static inline void vga_wgfx (void __iome
* VGA attribute controller register read/write
*/
-static inline uint8_t vga_rattr (void __iomem *regbase, uint8_t reg)
-{
- vga_w (regbase, VGA_ATT_IW, reg);
- return vga_r (regbase, VGA_ATT_R);
-}
-
-static inline void vga_wattr (void __iomem *regbase, uint8_t reg, uint8_t val)
-{
- vga_w (regbase, VGA_ATT_IW, reg);
- vga_w (regbase, VGA_ATT_W, val);
+static inline uint8_t vga_rattr(void __iomem *regbase, uint8_t reg)
+{
+ vga_w(regbase, VGA_ATT_IW, reg);
+ return vga_r(regbase, VGA_ATT_R);
+}
+
+static inline void vga_wattr(void __iomem *regbase, uint8_t reg, uint8_t val)
+{
+ vga_w(regbase, VGA_ATT_IW, reg);
+ vga_w(regbase, VGA_ATT_W, val);
}
static int detect_video(void *video_base)
@@ -324,7 +324,7 @@ static int detect_video(void *video_base
return video_found;
}
-int detect_vga()
+static int detect_vga(void)
{
/*
* Look at a number of well-known locations. Even if video is not at
@@ -341,7 +341,7 @@ int detect_vga()
}
/* This is actually code from vgaHWRestore in an old version of XFree86 :-) */
-void *setup_vga()
+void *setup_vga(void)
{
/* The following VGA state was saved from a chip in text mode 3. */
static unsigned char regs[] = {
@@ -464,10 +464,13 @@ static int vga_set_scanlines(unsigned sc
#define FONT_HEIGHT_MAX 32
#define CHAR_MAP_SIZE (FONT_COUNT_MAX * FONT_HEIGHT_MAX)
-/* At least on various ATI cards I haven't been able to get the sequencer
- to honor the change to the character map select register, thus at least
- a way to override the slot is needed. */
-static unsigned font_slot = 2;
+/*
+ * We use font slot 0 because ATI cards do not honour changes to the
+ * character map select register. The fontslot parameter can be used to
+ * choose a non-default slot if the video card supports it and you wish to
+ * preserve the BIOS-initialised font data.
+ */
+static unsigned font_slot = 0;
integer_param("fontslot", font_slot);
int vga_load_font(const struct font_desc *font, unsigned rows)
@@ -508,15 +511,18 @@ int vga_load_font(const struct font_desc
/* map start at A000:0000 */
vga_wgfx(vgabase, VGA_GFX_MISC, 0x00);
- if (font) {
+ if ( font )
+ {
unsigned i, j;
const uint8_t *data = font->data;
- uint8_t *map = (uint8_t *)__va(0xA0000) + font_slot * 2 *
CHAR_MAP_SIZE;
-
- for (i = j = 0; i < CHAR_MAP_SIZE; ) {
- vga_writeb(j < font->count * fontheight ? data[j++] : 0, map +
i++);
- if (!(j % fontheight))
- while(i & (FONT_HEIGHT_MAX - 1))
+ uint8_t *map = (uint8_t *)__va(0xA0000) + font_slot*2*CHAR_MAP_SIZE;
+
+ for ( i = j = 0; i < CHAR_MAP_SIZE; )
+ {
+ vga_writeb(j < font->count * fontheight ? data[j++] : 0,
+ map + i++);
+ if ( !(j % fontheight) )
+ while ( i & (FONT_HEIGHT_MAX - 1) )
vga_writeb(0, map + i++);
}
}
@@ -527,9 +533,9 @@ int vga_load_font(const struct font_desc
vga_wseq(vgabase, VGA_SEQ_PLANE_WRITE, 0x03);
/* odd-even addressing */
vga_wseq(vgabase, VGA_SEQ_MEMORY_MODE, 0x03);
- /* Character Map Select: The default font is kept in slot 0 and
- * is never touched. Our custom font is loaded in slot 2. */
- vga_wseq(vgabase, VGA_SEQ_CHARACTER_MAP, font ? font_slot | (font_slot <<
2) : 0x00);
+ /* Character Map Select: The default font is kept in slot 0. */
+ vga_wseq(vgabase, VGA_SEQ_CHARACTER_MAP,
+ font ? font_slot | (font_slot << 2) : 0x00);
/* clear synchronous reset */
vga_wseq(vgabase, VGA_SEQ_RESET, 0x03);
@@ -545,9 +551,11 @@ int vga_load_font(const struct font_desc
vga_wcrt(vgabase, VGA_CRTC_MAX_SCAN, fsr);
/* Cursor shape registers */
- fsr = (vga_rcrt(vgabase, VGA_CRTC_CURSOR_END) & 0xe0) | (fontheight -
fontheight / 6);
+ fsr = vga_rcrt(vgabase, VGA_CRTC_CURSOR_END) & 0xe0;
+ fsr |= fontheight - fontheight / 6;
vga_wcrt(vgabase, VGA_CRTC_CURSOR_END, fsr);
- fsr = (vga_rcrt(vgabase, VGA_CRTC_CURSOR_START) & 0xe0) | ((fsr & 0x1f) -
1);
+ fsr = vga_rcrt(vgabase, VGA_CRTC_CURSOR_START) & 0xe0;
+ fsr |= (fsr & 0x1f) - 1;
vga_wcrt(vgabase, VGA_CRTC_CURSOR_START, fsr);
return 0;
diff -r 01a4266e4dc9 -r d853acd5ed58 xen/include/xen/vga.h
--- a/xen/include/xen/vga.h Tue Aug 15 11:17:36 2006 +0100
+++ b/xen/include/xen/vga.h Tue Aug 15 11:36:10 2006 +0100
@@ -11,7 +11,6 @@
struct font_desc;
-int detect_vga(void);
void *setup_vga(void);
void vga_cursor_off(void);
int vga_load_font(const struct font_desc *, unsigned rows);
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