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* linux/drivers/video/fbcon.h -- Low level frame buffer based console driver
*
* Copyright (C) 1997 Geert Uytterhoeven
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#ifndef _VIDEO_FBCON_H
#define _VIDEO_FBCON_H
#include <linux/config.h>
#include <linux/types.h>
#include <linux/console_struct.h>
#include <linux/vt_buffer.h>
#include <asm/io.h>
/*
* `switch' for the Low Level Operations
*/
struct display_switch {
void (*setup)(struct display *p);
void (*bmove)(struct display *p, int sy, int sx, int dy, int dx,
int height, int width);
/* for clear, conp may be NULL, which means use a blanking (black) color */
void (*clear)(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width);
void (*putc)(struct vc_data *conp, struct display *p, int c, int yy,
int xx);
void (*putcs)(struct vc_data *conp, struct display *p, const unsigned short *s,
int count, int yy, int xx);
void (*revc)(struct display *p, int xx, int yy);
void (*cursor)(struct display *p, int mode, int xx, int yy);
int (*set_font)(struct display *p, int width, int height);
void (*clear_margins)(struct vc_data *conp, struct display *p,
int bottom_only);
unsigned int fontwidthmask; /* 1 at (1 << (width - 1)) if width is supported */
};
extern struct display_switch fbcon_dummy;
/*
* This is the interface between the low-level console driver and the
* low-level frame buffer device
*/
struct display {
/* Filled in by the frame buffer device */
struct fb_var_screeninfo var; /* variable infos. yoffset and vmode */
/* are updated by fbcon.c */
struct fb_cmap cmap; /* colormap */
char *screen_base; /* pointer to top of virtual screen */
/* (virtual address) */
int visual;
int type; /* see FB_TYPE_* */
int type_aux; /* Interleave for interleaved Planes */
u_short ypanstep; /* zero if no hardware ypan */
u_short ywrapstep; /* zero if no hardware ywrap */
u_long line_length; /* length of a line in bytes */
u_short can_soft_blank; /* zero if no hardware blanking */
u_short inverse; /* != 0 text black on white as default */
struct display_switch *dispsw; /* low level operations */
void *dispsw_data; /* optional dispsw helper data */
#if 0
struct fb_fix_cursorinfo fcrsr;
struct fb_var_cursorinfo *vcrsr;
struct fb_cursorstate crsrstate;
#endif
/* Filled in by the low-level console driver */
struct vc_data *conp; /* pointer to console data */
struct fb_info *fb_info; /* frame buffer for this console */
int vrows; /* number of virtual rows */
unsigned short cursor_x; /* current cursor position */
unsigned short cursor_y;
int fgcol; /* text colors */
int bgcol;
u_long next_line; /* offset to one line below */
u_long next_plane; /* offset to next plane */
u_char *fontdata; /* Font associated to this display */
unsigned short _fontheightlog;
unsigned short _fontwidthlog;
unsigned short _fontheight;
unsigned short _fontwidth;
int userfont; /* != 0 if fontdata kmalloc()ed */
u_short scrollmode; /* Scroll Method */
short yscroll; /* Hardware scrolling */
unsigned char fgshift, bgshift;
unsigned short charmask; /* 0xff or 0x1ff */
};
/* drivers/video/fbcon.c */
extern struct display fb_display[MAX_NR_CONSOLES];
extern char con2fb_map[MAX_NR_CONSOLES];
extern int PROC_CONSOLE(const struct fb_info *info);
extern void set_con2fb_map(int unit, int newidx);
extern int set_all_vcs(int fbidx, struct fb_ops *fb,
struct fb_var_screeninfo *var, struct fb_info *info);
#define fontheight(p) ((p)->_fontheight)
#define fontheightlog(p) ((p)->_fontheightlog)
#ifdef CONFIG_FBCON_FONTWIDTH8_ONLY
/* fontwidth w is supported by dispsw */
#define FONTWIDTH(w) (1 << ((8) - 1))
/* fontwidths w1-w2 inclusive are supported by dispsw */
#define FONTWIDTHRANGE(w1,w2) FONTWIDTH(8)
#define fontwidth(p) (8)
#define fontwidthlog(p) (0)
#else
/* fontwidth w is supported by dispsw */
#define FONTWIDTH(w) (1 << ((w) - 1))
/* fontwidths w1-w2 inclusive are supported by dispsw */
#define FONTWIDTHRANGE(w1,w2) (FONTWIDTH(w2+1) - FONTWIDTH(w1))
#define fontwidth(p) ((p)->_fontwidth)
#define fontwidthlog(p) ((p)->_fontwidthlog)
#endif
/*
* Attribute Decoding
*/
/* Color */
#define attr_fgcol(p,s) \
(((s) >> ((p)->fgshift)) & 0x0f)
#define attr_bgcol(p,s) \
(((s) >> ((p)->bgshift)) & 0x0f)
#define attr_bgcol_ec(p,conp) \
((conp) ? (((conp)->vc_video_erase_char >> ((p)->bgshift)) & 0x0f) : 0)
/* Monochrome */
#define attr_bold(p,s) \
((s) & 0x200)
#define attr_reverse(p,s) \
(((s) & 0x800) ^ ((p)->inverse ? 0x800 : 0))
#define attr_underline(p,s) \
((s) & 0x400)
#define attr_blink(p,s) \
((s) & 0x8000)
/*
* Scroll Method
*/
/* Internal flags */
#define __SCROLL_YPAN 0x001
#define __SCROLL_YWRAP 0x002
#define __SCROLL_YMOVE 0x003
#define __SCROLL_YREDRAW 0x004
#define __SCROLL_YMASK 0x00f
#define __SCROLL_YFIXED 0x010
#define __SCROLL_YNOMOVE 0x020
#define __SCROLL_YPANREDRAW 0x040
#define __SCROLL_YNOPARTIAL 0x080
/* Only these should be used by the drivers */
/* Which one should you use? If you have a fast card and slow bus,
then probably just 0 to indicate fbcon should choose between
YWRAP/YPAN+MOVE/YMOVE. On the other side, if you have a fast bus
and even better if your card can do fonting (1->8/32bit painting),
you should consider either SCROLL_YREDRAW (if your card is
able to do neither YPAN/YWRAP), or SCROLL_YNOMOVE.
The best is to test it with some real life scrolling (usually, not
all lines on the screen are filled completely with non-space characters,
and REDRAW performs much better on such lines, so don't cat a file
with every line covering all screen columns, it would not be the right
benchmark).
*/
#define SCROLL_YREDRAW (__SCROLL_YFIXED|__SCROLL_YREDRAW)
#define SCROLL_YNOMOVE (__SCROLL_YNOMOVE|__SCROLL_YPANREDRAW)
/* SCROLL_YNOPARTIAL, used in combination with the above, is for video
cards which can not handle using panning to scroll a portion of the
screen without excessive flicker. Panning will only be used for
whole screens.
*/
/* Namespace consistency */
#define SCROLL_YNOPARTIAL __SCROLL_YNOPARTIAL
extern void fbcon_redraw_bmove(struct display *, int, int, int, int, int, int);
/* ================================================================= */
/* Utility Assembler Functions */
/* ================================================================= */
#if defined(__mc68000__)
/* ====================================================================== */
/* Those of a delicate disposition might like to skip the next couple of
* pages.
*
* These functions are drop in replacements for memmove and
* memset(_, 0, _). However their five instances add at least a kilobyte
* to the object file. You have been warned.
*
* Not a great fan of assembler for the sake of it, but I think
* that these routines are at least 10 times faster than their C
* equivalents for large blits, and that's important to the lowest level of
* a graphics driver. Question is whether some scheme with the blitter
* would be faster. I suspect not for simple text system - not much
* asynchrony.
*
* Code is very simple, just gruesome expansion. Basic strategy is to
* increase data moved/cleared at each step to 16 bytes to reduce
* instruction per data move overhead. movem might be faster still
* For more than 15 bytes, we try to align the write direction on a
* longword boundary to get maximum speed. This is even more gruesome.
* Unaligned read/write used requires 68020+ - think this is a problem?
*
* Sorry!
*/
/* ++roman: I've optimized Robert's original versions in some minor
* aspects, e.g. moveq instead of movel, let gcc choose the registers,
* use movem in some places...
* For other modes than 1 plane, lots of more such assembler functions
* were needed (e.g. the ones using movep or expanding color values).
*/
/* ++andreas: more optimizations:
subl #65536,d0 replaced by clrw d0; subql #1,d0 for dbcc
addal is faster than addaw
movep is rather expensive compared to ordinary move's
some functions rewritten in C for clarity, no speed loss */
static __inline__ void *fb_memclear_small(void *s, size_t count)
{
if (!count)
return(0);
__asm__ __volatile__(
"lsrl #1,%1 ; jcc 1f ; moveb %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movew %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@- ; movel %2,%0@-\n\t"
"1: subql #1,%1 ; jcs 3f\n\t"
"2: moveml %2/%3/%4/%5,%0@-\n\t"
"dbra %1,2b\n\t"
"3:"
: "=a" (s), "=d" (count)
: "d" (0), "d" (0), "d" (0), "d" (0),
"0" ((char *)s+count), "1" (count)
);
return(0);
}
static __inline__ void *fb_memclear(void *s, size_t count)
{
if (!count)
return(0);
if (count < 16) {
__asm__ __volatile__(
"lsrl #1,%1 ; jcc 1f ; clrb %0@+\n\t"
"1: lsrl #1,%1 ; jcc 1f ; clrw %0@+\n\t"
"1: lsrl #1,%1 ; jcc 1f ; clrl %0@+\n\t"
"1: lsrl #1,%1 ; jcc 1f ; clrl %0@+ ; clrl %0@+\n\t"
"1:"
: "=a" (s), "=d" (count)
: "0" (s), "1" (count)
);
} else {
long tmp;
__asm__ __volatile__(
"movel %1,%2\n\t"
"lsrl #1,%2 ; jcc 1f ; clrb %0@+ ; subqw #1,%1\n\t"
"lsrl #1,%2 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/
"clrw %0@+ ; subqw #2,%1 ; jra 2f\n\t"
"1: lsrl #1,%2 ; jcc 2f\n\t"
"clrw %0@+ ; subqw #2,%1\n\t"
"2: movew %1,%2; lsrl #2,%1 ; jeq 6f\n\t"
"lsrl #1,%1 ; jcc 3f ; clrl %0@+\n\t"
"3: lsrl #1,%1 ; jcc 4f ; clrl %0@+ ; clrl %0@+\n\t"
"4: subql #1,%1 ; jcs 6f\n\t"
"5: clrl %0@+; clrl %0@+ ; clrl %0@+ ; clrl %0@+\n\t"
"dbra %1,5b ; clrw %1; subql #1,%1; jcc 5b\n\t"
"6: movew %2,%1; btst #1,%1 ; jeq 7f ; clrw %0@+\n\t"
"7: ; btst #0,%1 ; jeq 8f ; clrb %0@+\n\t"
"8:"
: "=a" (s), "=d" (count), "=d" (tmp)
: "0" (s), "1" (count)
);
}
return(0);
}
static __inline__ void *fb_memset255(void *s, size_t count)
{
if (!count)
return(0);
__asm__ __volatile__(
"lsrl #1,%1 ; jcc 1f ; moveb %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movew %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@-\n\t"
"1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@- ; movel %2,%0@-\n\t"
"1: subql #1,%1 ; jcs 3f\n\t"
"2: moveml %2/%3/%4/%5,%0@-\n\t"
"dbra %1,2b\n\t"
"3:"
: "=a" (s), "=d" (count)
: "d" (-1), "d" (-1), "d" (-1), "d" (-1),
"0" ((char *) s + count), "1" (count)
);
return(0);
}
static __inline__ void *fb_memmove(void *d, const void *s, size_t count)
{
if (d < s) {
if (count < 16) {
__asm__ __volatile__(
"lsrl #1,%2 ; jcc 1f ; moveb %1@+,%0@+\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movew %1@+,%0@+\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movel %1@+,%0@+\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movel %1@+,%0@+ ; movel %1@+,%0@+\n\t"
"1:"
: "=a" (d), "=a" (s), "=d" (count)
: "0" (d), "1" (s), "2" (count)
);
} else {
long tmp;
__asm__ __volatile__(
"movel %0,%3\n\t"
"lsrl #1,%3 ; jcc 1f ; moveb %1@+,%0@+ ; subqw #1,%2\n\t"
"lsrl #1,%3 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/
"movew %1@+,%0@+ ; subqw #2,%2 ; jra 2f\n\t"
"1: lsrl #1,%3 ; jcc 2f\n\t"
"movew %1@+,%0@+ ; subqw #2,%2\n\t"
"2: movew %2,%-; lsrl #2,%2 ; jeq 6f\n\t"
"lsrl #1,%2 ; jcc 3f ; movel %1@+,%0@+\n\t"
"3: lsrl #1,%2 ; jcc 4f ; movel %1@+,%0@+ ; movel %1@+,%0@+\n\t"
"4: subql #1,%2 ; jcs 6f\n\t"
"5: movel %1@+,%0@+;movel %1@+,%0@+\n\t"
"movel %1@+,%0@+;movel %1@+,%0@+\n\t"
"dbra %2,5b ; clrw %2; subql #1,%2; jcc 5b\n\t"
"6: movew %+,%2; btst #1,%2 ; jeq 7f ; movew %1@+,%0@+\n\t"
"7: ; btst #0,%2 ; jeq 8f ; moveb %1@+,%0@+\n\t"
"8:"
: "=a" (d), "=a" (s), "=d" (count), "=d" (tmp)
: "0" (d), "1" (s), "2" (count)
);
}
} else {
if (count < 16) {
__asm__ __volatile__(
"lsrl #1,%2 ; jcc 1f ; moveb %1@-,%0@-\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movew %1@-,%0@-\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movel %1@-,%0@-\n\t"
"1: lsrl #1,%2 ; jcc 1f ; movel %1@-,%0@- ; movel %1@-,%0@-\n\t"
"1:"
: "=a" (d), "=a" (s), "=d" (count)
: "0" ((char *) d + count), "1" ((char *) s + count), "2" (count)
);
} else {
long tmp;
__asm__ __volatile__(
"movel %0,%3\n\t"
"lsrl #1,%3 ; jcc 1f ; moveb %1@-,%0@- ; subqw #1,%2\n\t"
"lsrl #1,%3 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/
"movew %1@-,%0@- ; subqw #2,%2 ; jra 2f\n\t"
"1: lsrl #1,%3 ; jcc 2f\n\t"
"movew %1@-,%0@- ; subqw #2,%2\n\t"
"2: movew %2,%-; lsrl #2,%2 ; jeq 6f\n\t"
"lsrl #1,%2 ; jcc 3f ; movel %1@-,%0@-\n\t"
"3: lsrl #1,%2 ; jcc 4f ; movel %1@-,%0@- ; movel %1@-,%0@-\n\t"
"4: subql #1,%2 ; jcs 6f\n\t"
"5: movel %1@-,%0@-;movel %1@-,%0@-\n\t"
"movel %1@-,%0@-;movel %1@-,%0@-\n\t"
"dbra %2,5b ; clrw %2; subql #1,%2; jcc 5b\n\t"
"6: movew %+,%2; btst #1,%2 ; jeq 7f ; movew %1@-,%0@-\n\t"
"7: ; btst #0,%2 ; jeq 8f ; moveb %1@-,%0@-\n\t"
"8:"
: "=a" (d), "=a" (s), "=d" (count), "=d" (tmp)
: "0" ((char *) d + count), "1" ((char *) s + count), "2" (count)
);
}
}
return(0);
}
/* ++andreas: Simple and fast version of memmove, assumes size is
divisible by 16, suitable for moving the whole screen bitplane */
static __inline__ void fast_memmove(char *dst, const char *src, size_t size)
{
if (!size)
return;
if (dst < src)
__asm__ __volatile__
("1:"
" moveml %0@+,%/d0/%/d1/%/a0/%/a1\n"
" moveml %/d0/%/d1/%/a0/%/a1,%1@\n"
" addql #8,%1; addql #8,%1\n"
" dbra %2,1b\n"
" clrw %2; subql #1,%2\n"
" jcc 1b"
: "=a" (src), "=a" (dst), "=d" (size)
: "0" (src), "1" (dst), "2" (size / 16 - 1)
: "d0", "d1", "a0", "a1", "memory");
else
__asm__ __volatile__
("1:"
" subql #8,%0; subql #8,%0\n"
" moveml %0@,%/d0/%/d1/%/a0/%/a1\n"
" moveml %/d0/%/d1/%/a0/%/a1,%1@-\n"
" dbra %2,1b\n"
" clrw %2; subql #1,%2\n"
" jcc 1b"
: "=a" (src), "=a" (dst), "=d" (size)
: "0" (src + size), "1" (dst + size), "2" (size / 16 - 1)
: "d0", "d1", "a0", "a1", "memory");
}
#elif defined(CONFIG_SUN4)
/* You may think that I'm crazy and that I should use generic
routines. No, I'm not: sun4's framebuffer crashes if we std
into it, so we cannot use memset. */
static __inline__ void *sun4_memset(void *s, char val, size_t count)
{
int i;
for(i=0; i<count;i++)
((char *) s) [i] = val;
return s;
}
static __inline__ void *fb_memset255(void *s, size_t count)
{
return sun4_memset(s, 255, count);
}
static __inline__ void *fb_memclear(void *s, size_t count)
{
return sun4_memset(s, 0, count);
}
static __inline__ void *fb_memclear_small(void *s, size_t count)
{
return sun4_memset(s, 0, count);
}
/* To be honest, this is slow_memmove :). But sun4 is crappy, so what we can do. */
static __inline__ void fast_memmove(void *d, const void *s, size_t count)
{
int i;
if (d<s) {
for (i=0; i<count; i++)
((char *) d)[i] = ((char *) s)[i];
} else
for (i=0; i<count; i++)
((char *) d)[count-i-1] = ((char *) s)[count-i-1];
}
static __inline__ void *fb_memmove(char *dst, const char *src, size_t size)
{
fast_memmove(dst, src, size);
return dst;
}
#else
static __inline__ void *fb_memclear_small(void *s, size_t count)
{
return(memset(s, 0, count));
}
static __inline__ void *fb_memclear(void *s, size_t count)
{
return(memset(s, 0, count));
}
static __inline__ void *fb_memset255(void *s, size_t count)
{
return(memset(s, 255, count));
}
#if defined(__i386__)
static __inline__ void fast_memmove(void *d, const void *s, size_t count)
{
int d0, d1, d2, d3;
if (d < s) {
__asm__ __volatile__ (
"cld\n\t"
"shrl $1,%%ecx\n\t"
"jnc 1f\n\t"
"movsb\n"
"1:\tshrl $1,%%ecx\n\t"
"jnc 2f\n\t"
"movsw\n"
"2:\trep\n\t"
"movsl"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
:"0"(count),"1"((long)d),"2"((long)s)
:"memory");
} else {
__asm__ __volatile__ (
"std\n\t"
"shrl $1,%%ecx\n\t"
"jnc 1f\n\t"
"movb 3(%%esi),%%al\n\t"
"movb %%al,3(%%edi)\n\t"
"decl %%esi\n\t"
"decl %%edi\n"
"1:\tshrl $1,%%ecx\n\t"
"jnc 2f\n\t"
"movw 2(%%esi),%%ax\n\t"
"movw %%ax,2(%%edi)\n\t"
"decl %%esi\n\t"
"decl %%edi\n\t"
"decl %%esi\n\t"
"decl %%edi\n"
"2:\trep\n\t"
"movsl\n\t"
"cld"
: "=&c" (d0), "=&D" (d1), "=&S" (d2), "=&a" (d3)
:"0"(count),"1"(count-4+(long)d),"2"(count-4+(long)s)
:"memory");
}
}
static __inline__ void *fb_memmove(char *dst, const char *src, size_t size)
{
fast_memmove(dst, src, size);
return dst;
}
#else /* !i386 */
/*
* Anyone who'd like to write asm functions for other CPUs?
* (Why are these functions better than those from include/asm/string.h?)
*/
static __inline__ void *fb_memmove(void *d, const void *s, size_t count)
{
return(memmove(d, s, count));
}
static __inline__ void fast_memmove(char *dst, const char *src, size_t size)
{
memmove(dst, src, size);
}
#endif /* !i386 */
#endif
#if defined(__sparc__)
/* We map all of our framebuffers such that big-endian accesses
* are what we want, so the following is sufficient.
*/
#define fb_readb sbus_readb
#define fb_readw sbus_readw
#define fb_readl sbus_readl
#define fb_writeb sbus_writeb
#define fb_writew sbus_writew
#define fb_writel sbus_writel
#define fb_memset sbus_memset_io
#elif defined(__i386__) || defined(__alpha__)
#define fb_readb __raw_readb
#define fb_readw __raw_readw
#define fb_readl __raw_readl
#define fb_writeb __raw_writeb
#define fb_writew __raw_writew
#define fb_writel __raw_writel
#define fb_memset memset_io
#else
#define fb_readb(addr) (*(volatile u8 *) (addr))
#define fb_readw(addr) (*(volatile u16 *) (addr))
#define fb_readl(addr) (*(volatile u32 *) (addr))
#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
#define fb_memset memset
#endif
#endif /* _VIDEO_FBCON_H */
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