/* * 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 #include #include #include #include /* * `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 #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__) || defined(__x86_64__) #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 extern void fbcon_redraw_clear(struct vc_data *, struct display *, int, int, int, int); 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:" : "=a" (s), "=d" (count) : "d" (0), "0" ((char *)s+count), "1" (count) ); __asm__ __volatile__( "subql #1,%1 ; jcs 3f\n\t" "movel %2,%%d4; movel %2,%%d5; movel %2,%%d6\n\t" "2: moveml %2/%%d4/%%d5/%%d6,%0@-\n\t" "dbra %1,2b\n\t" "3:" : "=a" (s), "=d" (count) : "d" (0), "0" (s), "1" (count) : "d4", "d5", "d6" ); 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:" : "=a" (s), "=d" (count) : "d" (-1), "0" ((char *)s+count), "1" (count) ); __asm__ __volatile__( "subql #1,%1 ; jcs 3f\n\t" "movel %2,%%d4; movel %2,%%d5; movel %2,%%d6\n\t" "2: moveml %2/%%d4/%%d5/%%d6,%0@-\n\t" "dbra %1,2b\n\t" "3:" : "=a" (s), "=d" (count) : "d" (-1), "0" (s), "1" (count) : "d4", "d5", "d6" ); 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 3) { fb_writel(0, xs); xs += 4; count -= 4; } rest: while (count--) fb_writeb(0, xs++); return s; } static __inline__ void *fb_memset255(void *s, size_t count) { unsigned long xs = (unsigned long) s; if (count < 8) goto rest; if (xs & 1) { fb_writeb(0xff, xs++); count--; } if (xs & 2) { fb_writew(0xffff, xs); xs += 2; count -= 2; } while (count > 3) { fb_writel(0xffffffff, xs); xs += 4; count -= 4; } rest: while (count--) fb_writeb(0xff, xs++); return s; } #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) { unsigned long dst, src; if (d < s) { dst = (unsigned long) d; src = (unsigned long) s; if ((count < 8) || ((dst ^ src) & 3)) goto restup; if (dst & 1) { fb_writeb(fb_readb(src++), dst++); count--; } if (dst & 2) { fb_writew(fb_readw(src), dst); src += 2; dst += 2; count -= 2; } while (count > 3) { fb_writel(fb_readl(src), dst); src += 4; dst += 4; count -= 4; } restup: while (count--) fb_writeb(fb_readb(src++), dst++); } else { dst = (unsigned long) d + count; src = (unsigned long) s + count; if ((count < 8) || ((dst ^ src) & 3)) goto restdown; if (dst & 1) { src--; dst--; count--; fb_writeb(fb_readb(src), dst); } if (dst & 2) { src -= 2; dst -= 2; count -= 2; fb_writew(fb_readw(src), dst); } while (count > 3) { src -= 4; dst -= 4; count -= 4; fb_writel(fb_readl(src), dst); } restdown: while (count--) { src--; dst--; fb_writeb(fb_readb(src), dst); } } return d; } static __inline__ void fast_memmove(char *d, const char *s, size_t count) { unsigned long dst, src; if (d < s) { dst = (unsigned long) d; src = (unsigned long) s; if ((count < 8) || ((dst ^ src) & 3)) goto restup; if (dst & 1) { fb_writeb(fb_readb(src++), dst++); count--; } if (dst & 2) { fb_writew(fb_readw(src), dst); src += 2; dst += 2; count -= 2; } while (count > 3) { fb_writel(fb_readl(src), dst); src += 4; dst += 4; count -= 4; } restup: while (count--) fb_writeb(fb_readb(src++), dst++); } else { dst = (unsigned long) d + count; src = (unsigned long) s + count; if ((count < 8) || ((dst ^ src) & 3)) goto restdown; if (dst & 1) { src--; dst--; count--; fb_writeb(fb_readb(src), dst); } if (dst & 2) { src -= 2; dst -= 2; count -= 2; fb_writew(fb_readw(src), dst); } while (count > 3) { src -= 4; dst -= 4; count -= 4; fb_writel(fb_readl(src), dst); } restdown: while (count--) { src--; dst--; fb_writeb(fb_readb(src), dst); } } } #endif /* !__i386__ */ #endif /* !__mc68000__ */ #endif /* _VIDEO_FBCON_H */