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view entry at GitHub | download recipe.bz2 file
01-gobohide.patch
02-unionfs-2.0.patch
03-squashfs-3.1.patch
04-vesafb-tng-2.6.19-rc2.patch
05-utf8-input-backspace.patch
06-utf8-input-kbdmode.patch
07-utf8-keyboard-capslock.patch
08-utf8-output-keep-columns-and-print-replacement-character.patch
09-utf8-output.patch
10-utf8-selection.patch
Recipe
Resources/BuildInformation
Resources/Dependencies
Resources/Description
Resources/NewDependencies
i686/Recipe
i686/dot-config
ppc/Recipe
ppc/dot-config
--- linux-2.6.18.3.orig/Documentation/fb/vesafb.txt	2006-11-19 01:28:22.000000000 \
-0200
+++ linux-2.6.18.3/Documentation/fb/vesafb.txt	2006-11-26 21:08:46.000000000 -0200
@@ -2,16 +2,18 @@
 What is vesafb?
 ===============
 
-This is a generic driver for a graphic framebuffer on intel boxes.
+Vesafb is a generic framebuffer driver for x86 and x86_64 boxes.
 
-The idea is simple:  Turn on graphics mode at boot time with the help
-of the BIOS, and use this as framebuffer device /dev/fb0, like the m68k
-(and other) ports do.
-
-This means we decide at boot time whenever we want to run in text or
-graphics mode.  Switching mode later on (in protected mode) is
-impossible; BIOS calls work in real mode only.  VESA BIOS Extensions
-Version 2.0 are required, because we need a linear frame buffer.
+VESA BIOS Extensions Version 2.0 are required, because we need access to
+a linear frame buffer. VBE 3.0 is required if you want to use modes with a
+higher (than the standard 60 Hz) refresh rate.
+
+The VESA framebuffer driver comes in two flavors - the standard 'vesafb'
+and 'vesafb-tng'. Vesafb-tng is available only on 32-bit x86 due to the
+technology it uses (vm86). Vesafb-tng has more features than vesafb
+(adjusting the refresh rate on VBE 3.0 compliant boards, switching the
+video mode without rebooting, selecting a mode by providing its
+modedb name, and more).
 
 Advantages:
 
@@ -29,26 +31,35 @@ Disadvantages:
 How to use it?
 ==============
 
-Switching modes is done using the vga=... boot parameter.  Read
-Documentation/svga.txt for details.
-
-You should compile in both vgacon (for text mode) and vesafb (for
-graphics mode). Which of them takes over the console depends on
-whenever the specified mode is text or graphics.
-
-The graphic modes are NOT in the list which you get if you boot with
-vga=ask and hit return. The mode you wish to use is derived from the
-VESA mode number. Here are those VESA mode numbers:
+If you are running a 32-bit x86 system and you decide to use vesafb-tng,
+you can either compile the driver into the kernel or use it as a module.
+The graphics mode you want to use is in both cases specified using the
+standard modedb format.
+
+If your system doesn't support vm86 calls, things get a little more tricky.
+Since on such systems you can't do BIOS calls from protected mode in which
+kernel runs, you have to decide at boot time whenever you want to run in text
+or in graphics mode. Switching mode later on is impossible. Switching modes
+is done using the vga=... boot parameter.  Read Documentation/svga.txt for
+details. Below is a more detailed description of what to do on systems using
+the standard vesafb driver.
+
+You should compile in both vgacon (for text mode) and vesafb (for graphics
+mode). Which of them takes over the console depends on whenever the
+specified mode is text or graphics.
+
+The graphic modes are NOT in the list which you get if you boot with vga=ask
+and hit return. The mode you wish to use is derived from the VESA mode number.
+Here are those VESA mode numbers:
 
     | 640x480  800x600  1024x768 1280x1024
 ----+-------------------------------------
-256 |  0x101    0x103    0x105    0x107   
-32k |  0x110    0x113    0x116    0x119   
-64k |  0x111    0x114    0x117    0x11A   
-16M |  0x112    0x115    0x118    0x11B   
+256 |  0x101    0x103    0x105    0x107
+32k |  0x110    0x113    0x116    0x119
+64k |  0x111    0x114    0x117    0x11A
+16M |  0x112    0x115    0x118    0x11B
 
-The video mode number of the Linux kernel is the VESA mode number plus
-0x200.
+The video mode number of the Linux kernel is the VESA mode number plus 0x200.
  
  Linux_kernel_mode_number = VESA_mode_number + 0x200
 
@@ -56,15 +67,15 @@ So the table for the Kernel mode numbers
 
     | 640x480  800x600  1024x768 1280x1024
 ----+-------------------------------------
-256 |  0x301    0x303    0x305    0x307   
-32k |  0x310    0x313    0x316    0x319   
-64k |  0x311    0x314    0x317    0x31A   
-16M |  0x312    0x315    0x318    0x31B   
-
-To enable one of those modes you have to specify "vga=ask" in the
-lilo.conf file and rerun LILO. Then you can type in the desired
-mode at the "vga=ask" prompt. For example if you like to use 
-1024x768x256 colors you have to say "305" at this prompt.
+256 |  0x301    0x303    0x305    0x307
+32k |  0x310    0x313    0x316    0x319
+64k |  0x311    0x314    0x317    0x31A
+16M |  0x312    0x315    0x318    0x31B
+
+To enable one of those modes you have to specify "vga=ask" in the lilo.conf
+file and rerun LILO. Then you can type in the desired mode at the "vga=ask"
+prompt. For example if you like to use 1024x768x256 colors you have to say
+"305" at this prompt.
 
 If this does not work, this might be because your BIOS does not support
 linear framebuffers or because it does not support this mode at all.
@@ -72,11 +83,12 @@ Even if your board does, it might be the
 Extensions v2.0 are required, 1.2 is NOT sufficient.  You will get a
 "bad mode number" message if something goes wrong.
 
-1. Note: LILO cannot handle hex, for booting directly with 
+1. Note: LILO cannot handle hex, for booting directly with
          "vga=mode-number" you have to transform the numbers to decimal.
 2. Note: Some newer versions of LILO appear to work with those hex values,
          if you set the 0x in front of the numbers.
 
+
 X11
 ===
 
@@ -84,98 +96,164 @@ XF68_FBDev should work just fine, but it
 another (accelerated) X-Server like XF86_SVGA might or might not work.
 It depends on X-Server and graphics board.
 
-The X-Server must restore the video mode correctly, else you end up
+The X-Server must restore the video mode correctly, or else you end up
 with a broken console (and vesafb cannot do anything about this).
+With vesafb-tng chances are that the console will be restored properly
+even if the X server messes up the video mode.
 
 
 Refresh rates
 =============
 
-There is no way to change the vesafb video mode and/or timings after
-booting linux.  If you are not happy with the 60 Hz refresh rate, you
-have these options:
-
- * configure and load the DOS-Tools for your the graphics board (if
-   available) and boot linux with loadlin.
- * use a native driver (matroxfb/atyfb) instead if vesafb.  If none
+With VBE 3.0 compatible BIOSes and vesafb-tng it is possible to change
+the refresh rate either at boot time (by specifying the @<rr> part of
+the mode name) or later, using the fbset utility.
+
+If you want to use the default BIOS refresh rate while switching modes
+on a running system, set pixclock to 0.
+
+With VBE 2.0 there is no way to change the mode timings after booting
+Linux. If you are not happy with the 60 Hz refresh rate, you have
+the following options:
+
+ * Configure and load the DOS tools for your the graphics board (if
+   available) and boot Linux with loadlin.
+ * Use a native driver (matroxfb/atyfb) instead of vesafb.  If none
    is available, write a new one!
- * VBE 3.0 might work too.  I have neither a gfx board with VBE 3.0
-   support nor the specs, so I have not checked this yet.
+ * Use a BIOS editor to change the default refresh rate (such an
+   editor does exist at least for ATI Radeon BIOSes).
+ * If you're running a non-vm86 and VBE 3.0 compatible system, you can
+   use a kernel patch (vesafb-rrc) to hard-code some mode timings in
+   the kernel and use these while setting the video mode at boot time.
+
+Note that there are some boards (nVidia 59**, 57** and newer models)
+claiming that their Video BIOS is VBE 3.0 compliant, while ignoring the
+CRTC values provided by software such as vesafb-tng. You'll not be able
+to adjust the refresh rate if you're using one of these boards.
 
 
 Configuration
 =============
 
-The VESA BIOS provides protected mode interface for changing
-some parameters.  vesafb can use it for palette changes and
-to pan the display.  It is turned off by default because it
-seems not to work with some BIOS versions, but there are options
-to turn it on.
-
-You can pass options to vesafb using "video=vesafb:option" on
-the kernel command line.  Multiple options should be separated
-by comma, like this: "video=vesafb:ypan,invers"
-
-Accepted options:
-
-invers	no comment...
-
-ypan	enable display panning using the VESA protected mode 
-	interface.  The visible screen is just a window of the
-	video memory, console scrolling is done by changing the
-	start of the window.
-	pro:	* scrolling (fullscreen) is fast, because there is
-		  no need to copy around data.
-		* You'll get scrollback (the Shift-PgUp thing),
-		  the video memory can be used as scrollback buffer
-	kontra: * scrolling only parts of the screen causes some
-		  ugly flicker effects (boot logo flickers for
-		  example).
-
-ywrap	Same as ypan, but assumes your gfx board can wrap-around 
-	the video memory (i.e. starts reading from top if it
-	reaches the end of video memory).  Faster than ypan.
-
-redraw	scroll by redrawing the affected part of the screen, this
-	is the safe (and slow) default.
-
-
-vgapal	Use the standard vga registers for palette changes.
-	This is the default.
-pmipal	Use the protected mode interface for palette changes.
-
-mtrr:n	setup memory type range registers for the vesafb framebuffer
-	where n:
-	      0 - disabled (equivalent to nomtrr) (default)
-	      1 - uncachable
-	      2 - write-back
-	      3 - write-combining
-	      4 - write-through
+The VESA BIOS provides protected mode interface for changing some parameters.
+vesafb can use it for palette changes and to pan the display. It is turned
+off by default because it seems not to work with some BIOS versions, but
+there are options to turn it on.
+
+You can pass options to vesafb using "video=vesafb:option" on the kernel
+command line. Multiple options should be separated by a comma, like this:
+"video=vesafb:ypan,1024x768-32@85"
+
+Note that vesafb-tng still uses the "video=vesafb:option" format of the
+kernel command line video parameter. "video=vesafb-tng:xxx" is incorrect.
+
+Accepted options (both vesafb and vesafb-tng):
+
+ypan    Enable display panning using the VESA protected mode interface
+        The visible screen is just a window of the video memory,
+        console scrolling is done by changing the start of the window.
+        pro:    * scrolling (fullscreen) is fast, because there is
+                  no need to copy around data.
+                * you'll get scrollback (the Shift-PgUp thing),
+                  the video memory can be used as scrollback buffer
+        con:    * scrolling only parts of the screen causes some
+                  ugly flicker effects (boot logo flickers for
+                  example).
+
+ywrap   Same as ypan, but assumes your gfx board can wrap-around the video
+        memory (i.e. starts reading from top if it reaches the end of
+        video memory). Faster than ypan.
+
+redraw  Scroll by redrawing the affected part of the screen, this is the
+        safe (and slow) default.
+
+vgapal  Use the standard VGA registers for palette changes.
+
+pmipal  Use the protected mode interface for palette changes.
+        This is the default is the protected mode interface is available.
+
+mtrr:n  Setup memory type range registers for the vesafb framebuffer
+        where n:
+              0 - disabled (equivalent to nomtrr) (default)
+              1 - uncachable
+              2 - write-back
+              3 - write-combining
+              4 - write-through
 
-	If you see the following in dmesg, choose the type that matches the
-	old one. In this example, use "mtrr:2".
+        If you see the following in dmesg, choose the type that matches
+        the old one. In this example, use "mtrr:2".
 ...
 mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
 ...
 
-nomtrr  disable mtrr
+nomtrr  Do not use memory type range registers for vesafb.
 
 vremap:n
         remap 'n' MiB of video RAM. If 0 or not specified, remap memory
-	according to video mode. (2.5.66 patch/idea by Antonino Daplas
-	reversed to give override possibility (allocate more fb memory
-	than the kernel would) to 2.4 by tmb@iki.fi)
+        according to video mode. (2.5.66 patch/idea by Antonino Daplas
+        reversed to give override possibility (allocate more fb memory
+        than the kernel would) to 2.4 by tmb@iki.fi)
 
 vtotal:n
         if the video BIOS of your card incorrectly determines the total
         amount of video RAM, use this option to override the BIOS (in MiB).
 
-Have fun!
+Options accepted only by vesafb-tng:
 
-  Gerd
+<mode>  The mode you want to set, in the standard modedb format. Refer to
+        modedb.txt for a detailed description. If you specify a mode that is
+        not supported by your board's BIOS, vesafb-tng will attempt to set a
+        similar mode. The list of supported modes can be found in
+        /proc/fbx/modes, where x is the framebuffer number (usually 0).
+        When vesafb-tng is compiled as a module, the mode string should be
+        provided as a value of the parameter 'mode'.
+
+vbemode:x
+        Force the use of VBE mode x. The mode will only be set if it's
+        found in the VBE-provided list of supported modes.
+        NOTE: The mode number 'x' should be specified in VESA mode number
+        notation, not the Linux kernel one (eg. 257 instead of 769).
+        HINT: If you use this option because normal <mode> parameter does
+        not work for you and you use a X server, you'll probably want to
+        set the 'nocrtc' option to ensure that the video mode is properly
+        restored after console <-> X switches.
+
+nocrtc  Do not use CRTC timings while setting the video mode. This option
+        makes sence only with VBE 3.0 compliant systems. Use it if you have
+        problems with modes set in the standard way. Note that using this
+		option means that any refresh rate adjustments will be ignored
+		and the refresh rate will stay at your BIOS default (60 Hz).
+
+noedid  Do not try to fetch and use EDID-provided modes.
+
+noblank Disable hardware blanking.
+
+gtf     Force the use of VESA's GTF (Generalized Timing Formula). Specifying
+        this will cause vesafb to skip its internal modedb and EDID-modedb
+        and jump straight to the GTF part of the code (normally used only if
+        everything else failed). This can be useful if you want to get as
+        much as possible from your graphics board but your BIOS doesn't
+        support modes with the refresh rates you require. Note that you may 
+		need to specify the maxhf, maxvf and maxclk parameters if they are not
+        provided by the EDID block.
+
+Additionally, the following parameters may be provided. They all override the
+EDID-provided values and BIOS defaults. Refer to your monitor's specs to get
+the correct values for maxhf, maxvf and maxclk for your hardware.
+
+maxhf:n     Maximum horizontal frequency (in kHz).
+maxvf:n     Maximum vertical frequency (in Hz).
+maxclk:n    Maximum pixel clock (in MHz).
+
+Have fun!
 
 --
+Original document for the vesafb driver by
 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 
-Minor (mostly typo) changes 
-by Nico Schmoigl <schmoigl@rumms.uni-mannheim.de>
+Minor (mostly typo) changes by
+Nico Schmoigl <schmoigl@rumms.uni-mannheim.de>
+
+Extended documentation for vm86, VBE 3.0 and vesafb-tng by
+Michal Januszewski <spock@gentoo.org>
+
--- linux-2.6.18.3.orig/arch/i386/boot/video.S	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/arch/i386/boot/video.S	2006-11-26 21:08:46.000000000 -0200
@@ -165,10 +165,12 @@ basret:	ret
 # parameters in the default 80x25 mode -- these are set directly,
 # because some very obscure BIOSes supply insane values.
 mode_params:
+#ifdef CONFIG_FB_VESA_STD
 #ifdef CONFIG_VIDEO_SELECT
 	cmpb	$0, graphic_mode
 	jnz	mopar_gr
 #endif
+#endif
 	movb	$0x03, %ah			# Read cursor position
 	xorb	%bh, %bh
 	int	$0x10
@@ -201,6 +203,7 @@ mopar2: movb	%al, %fs:(PARAM_VIDEO_LINES
 	ret
 
 #ifdef CONFIG_VIDEO_SELECT
+#ifdef CONFIG_FB_VESA_STD
 # Fetching of VESA frame buffer parameters
 mopar_gr:
 	leaw	modelist+1024, %di
@@ -283,6 +286,7 @@ dac_done:
 	movw	%es, %fs:(PARAM_VESAPM_SEG)
 	movw	%di, %fs:(PARAM_VESAPM_OFF)
 no_pm:	ret
+#endif
 
 # The video mode menu
 mode_menu:
@@ -497,10 +501,12 @@ mode_set:
 	
 	cmpb	$VIDEO_FIRST_V7>>8, %ah
 	jz	setv7
-	
+
+#ifdef CONFIG_FB_VESA_STD
 	cmpb	$VIDEO_FIRST_VESA>>8, %ah
 	jnc	check_vesa
-	
+#endif	
+
 	orb	%ah, %ah
 	jz	setmenu
 	
@@ -572,6 +578,7 @@ setr1:	lodsw
 	movw	-4(%si), %ax			# Fetch mode ID
 	jmp	_m_s
 
+#ifdef CONFIG_FB_VESA_STD
 check_vesa:
 	leaw	modelist+1024, %di
 	subb	$VIDEO_FIRST_VESA>>8, %bh
@@ -605,6 +612,7 @@ check_vesa:
 	ret
 
 _setbad:	jmp	setbad          	# Ugly...
+#endif
 
 # Recalculate vertical display end registers -- this fixes various
 # inconsistencies of extended modes on many adapters. Called when
--- linux-2.6.18.3.orig/drivers/char/sysrq.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/drivers/char/sysrq.c	2006-11-26 21:09:27.000000000 -0200
@@ -208,7 +208,7 @@ static void send_sig_all(int sig)
 	struct task_struct *p;
 
 	for_each_process(p) {
-		if (p->mm && p->pid != 1)
+		if (p->mm && p->pid != 1 && !(p->flags & PF_BORROWED_MM))
 			/* Not swapper, init nor kernel thread */
 			force_sig(sig, p);
 	}
--- linux-2.6.18.3.orig/drivers/video/Kconfig	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/drivers/video/Kconfig	2006-11-26 21:08:46.000000000 -0200
@@ -541,8 +541,22 @@ config FB_TGA
 	  cards. Say Y if you have one of those.
 
 config FB_VESA
-	bool "VESA VGA graphics support"
-	depends on (FB = y) && X86
+	tristate "VESA VGA graphics support"
+	depends on (FB = y) && (X86 || X86_64)
+	help
+	  This is the frame buffer device driver for generic VESA 2.0
+	  compliant graphic cards. The older VESA 1.2 cards are not supported.
+	  You will get a boot time penguin logo at no additional cost. Please
+	  read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
+
+choice 
+	prompt "VESA driver type"
+	depends on FB_VESA
+	default FB_VESA_STD if X86_64
+	default FB_VESA_TNG if X86
+
+config FB_VESA_STD
+	bool "vesafb"
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
@@ -550,7 +564,43 @@ config FB_VESA
 	  This is the frame buffer device driver for generic VESA 2.0
 	  compliant graphic cards. The older VESA 1.2 cards are not supported.
 	  You will get a boot time penguin logo at no additional cost. Please
-	  read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
+	  read <file:Documentation/fb/vesafb.txt>. Choose this driver if you
+	  are experiencing problems with vesafb-tng or if you own a 64-bit system.
+
+	  Note that this driver cannot be compiled as a module.
+
+config FB_VESA_TNG
+	bool "vesafb-tng"
+	depends on !X86_64
+	select FB_MODE_HELPERS
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	help
+	  This is an enhanced generic frame buffer device driver for
+	  VBE 2.0 compliant graphic cards. It can take advantage of VBE 3.0
+	  features (refresh rate adjustment) when these are available.
+	  The driver also makes it possible to change the video mode
+	  on the fly and to switch back to text mode when it's unloaded.
+
+	  If the driver is compiled as a module, the module will be called
+	  vesafb-tng.
+
+endchoice
+
+config FB_VESA_DEFAULT_MODE
+	string "VESA default mode"
+	depends on FB_VESA_TNG
+	default "640x480@60"
+	help 
+	  This option is used to determine the default mode vesafb is
+	  supposed to switch to in case no mode is provided as a kernel
+	  command line parameter.
+
+config VIDEO_SELECT
+	bool
+	depends on FB_VESA
+	default y
 
 config FB_IMAC
 	bool "Intel-based Macintosh Framebuffer Support"
--- linux-2.6.18.3.orig/drivers/video/Makefile	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/drivers/video/Makefile	2006-11-26 21:08:46.000000000 -0200
@@ -100,7 +100,11 @@ obj-$(CONFIG_FB_PNX4008_DUM)	  += pnx400
 obj-$(CONFIG_FB_PNX4008_DUM_RGB)  += pnx4008/
 
 # Platform or fallback drivers go here
-obj-$(CONFIG_FB_VESA)             += vesafb.o
+ifeq ($(CONFIG_FB_VESA_STD),y)
+  obj-y				  += vesafb.o
+else
+  obj-$(CONFIG_FB_VESA)		  += vesafb-thread.o vesafb-tng.o
+endif
 obj-$(CONFIG_FB_IMAC)             += imacfb.o
 obj-$(CONFIG_FB_VGA16)            += vga16fb.o vgastate.o
 obj-$(CONFIG_FB_OF)               += offb.o
--- linux-2.6.18.3.orig/drivers/video/fbmem.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/drivers/video/fbmem.c	2006-11-26 21:08:46.000000000 -0200
@@ -1408,6 +1408,7 @@ fbmem_init(void)
 		printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
 		fb_class = NULL;
 	}
+
 	return 0;
 }
 
--- linux-2.6.18.3.orig/drivers/video/modedb.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/drivers/video/modedb.c	2006-11-26 21:08:46.000000000 -0200
@@ -674,6 +674,7 @@ void fb_var_to_videomode(struct fb_video
 {
 	u32 pixclock, hfreq, htotal, vtotal;
 
+	mode->refresh = 0;
 	mode->name = NULL;
 	mode->xres = var->xres;
 	mode->yres = var->yres;
@@ -1025,3 +1026,4 @@ EXPORT_SYMBOL(fb_find_best_mode);
 EXPORT_SYMBOL(fb_find_nearest_mode);
 EXPORT_SYMBOL(fb_videomode_to_modelist);
 EXPORT_SYMBOL(fb_find_mode);
+EXPORT_SYMBOL(fb_destroy_modelist);
--- linux-2.6.18.3.orig/drivers/video/vesafb-thread.c	1969-12-31 21:00:00.000000000 \
-0300
+++ linux-2.6.18.3/drivers/video/vesafb-thread.c	2006-11-26 21:08:46.000000000 -0200
@@ -0,0 +1,724 @@
+/*
+ * Framebuffer driver for VBE 2.0+ compliant graphic boards.
+ * Kernel thread and vm86 routines.
+ *
+ * (c) 2004-2006 Michal Januszewski <spock@gentoo.org>
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/signal.h>
+#include <linux/suspend.h>
+#include <linux/unistd.h>
+#include <video/vesa.h>
+#include <video/edid.h>
+#include <asm/mman.h>
+#include <asm/page.h>
+#include <asm/vm86.h>
+#include <asm/thread_info.h>
+#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
+#include "edid.h"
+
+// static int errno;
+
+static DECLARE_COMPLETION(vesafb_th_completion);
+static DECLARE_MUTEX(vesafb_task_list_sem);
+static LIST_HEAD(vesafb_task_list);
+static DECLARE_WAIT_QUEUE_HEAD(vesafb_wait);
+
+static struct vm86_struct vm86;
+static int vesafb_pid = 0;
+
+_syscall3(int,ioperm,unsigned long, a, unsigned long, b, unsigned long, c);
+_syscall1(int,vm86old,struct vm86_struct __user*, v86);
+
+#define DEFAULT_VM86_FLAGS (IF_MASK | IOPL_MASK)
+#define VM86_PUSHW(x)					\
+do { 							\
+	vm86.regs.esp -= 2; 				\
+	*(u16*)(STACK_ADDR + vm86.regs.esp) = x;	\
+} while(0);
+
+/* Stack, the return code and buffers will be put into
+ * one contiguous memory chunk:
+ *
+ * [ STACK | RET_CODE | BUFFER ]
+ *
+ * Some video BIOSes (sis6326) try to store data somewhere
+ * in 0x7000-0x7fff, so we zeromap more memory to be safe.
+ */
+#define IVTBDA_SIZE 	PAGE_SIZE
+#define RET_CODE_SIZE	0x0010
+#define STACK_SIZE	0x0500
+#define BUFFER_SIZE	0x10000
+
+/* The amount of memory that will be allocated should be a multiple
+ * of PAGE_SIZE. */
+#define __MEM_SIZE 	(RET_CODE_SIZE + STACK_SIZE + BUFFER_SIZE)
+#define REAL_MEM_SIZE	(((__MEM_SIZE / PAGE_SIZE) + 1) * PAGE_SIZE)
+
+#define IVTBDA_ADDR	0x00000
+#define STACK_ADDR	(IVTBDA_ADDR + IVTBDA_SIZE)
+#define RET_CODE_ADDR	(STACK_ADDR + STACK_SIZE)
+#define BUF_ADDR	(RET_CODE_ADDR + RET_CODE_SIZE)
+
+#define FLAG_D 		(1 << 10)
+
+/* Segment prefix opcodes */
+enum {
+	P_CS = 0x2e,
+	P_SS = 0x36,
+	P_DS = 0x3e,
+	P_ES = 0x26,
+	P_FS = 0x64,
+	P_GS = 0x65
+};
+
+/* Emulated vm86 ins instruction */
+static void vm86_ins(int size)
+{
+	u32 edx, edi;
+	edx = vm86.regs.edx & 0xffff;
+	edi = (vm86.regs.edi & 0xffff) + (u32)(vm86.regs.es << 4);
+
+	if (vm86.regs.eflags & FLAG_D)
+		asm volatile ("std\n");
+	else
+		asm volatile ("cld\n");
+
+	switch (size) {
+	case 4:
+		asm volatile ("insl\n" : "=D" (edi) : "d" (edx), "0" (edi));
+		break;
+	case 2:
+		asm volatile ("insw\n" : "=D" (edi) : "d" (edx), "0" (edi));
+		break;
+	case 1:
+		asm volatile ("insb\n" : "=D" (edi) : "d" (edx), "0" (edi));
+		break;
+	}
+
+	if (vm86.regs.eflags & FLAG_D)
+		asm volatile ("cld\n");
+
+	edi -= (u32)(vm86.regs.es << 4);
+
+	vm86.regs.edi &= 0xffff0000;
+	vm86.regs.edi |= edi & 0xffff;
+}
+
+static void vm86_rep_ins(int size)
+{
+	u16 cx = vm86.regs.ecx;
+	while (cx--)
+		vm86_ins(size);
+
+	vm86.regs.ecx &= 0xffff0000;
+}
+
+/* Emulated vm86 outs instruction */
+static void vm86_outs(int size, int segment)
+{
+	u32 edx, esi, base;
+
+	edx = vm86.regs.edx & 0xffff;
+	esi = vm86.regs.esi & 0xffff;
+
+	switch (segment) {
+	case P_CS: base = vm86.regs.cs; break;
+	case P_SS: base = vm86.regs.ss; break;
+	case P_ES: base = vm86.regs.es; break;
+	case P_FS: base = vm86.regs.fs; break;
+	case P_GS: base = vm86.regs.gs; break;
+	default:   base = vm86.regs.ds; break;
+	}
+
+	esi += base << 4;
+
+	if (vm86.regs.eflags & FLAG_D)
+		asm volatile ("std\n");
+	else
+		asm volatile ("cld\n");
+
+	switch (size) {
+	case 4:
+		asm volatile ("outsl\n" : "=S" (esi) : "d" (edx), "0" (esi));
+		break;
+	case 2:
+		asm volatile ("outsw\n" : "=S" (esi) : "d" (edx), "0" (esi));
+		break;
+	case 1:
+		asm volatile ("outsb\n" : "=S" (esi) : "d" (edx), "0" (esi));
+		break;
+	}
+
+	if (vm86.regs.eflags & FLAG_D)
+		asm volatile ("cld");
+
+	esi -= base << 4;
+	vm86.regs.esi &= 0xffff0000;
+	vm86.regs.esi |= (esi & 0xffff);
+}
+
+static void vm86_rep_outs(int size, int segment)
+{
+	u16 cx = vm86.regs.ecx;
+	while (cx--)
+		vm86_outs(size, segment);
+
+	vm86.regs.ecx &= 0xffff0000;
+}
+
+static int vm86_do_unknown(void)
+{
+	u8 data32 = 0, segment = P_DS, rep = 0;
+	u8 *instr;
+	int ret = 0, i = 0;
+
+	instr = (u8*)((vm86.regs.cs << 4) + vm86.regs.eip);
+
+	while (1) {
+		switch(instr[i]) {
+		case 0x66:	/* operand size prefix */
+			data32 = 1 - data32;
+			i++;
+			break;
+		case 0xf2:	/* repnz */
+		case 0xf3:	/* rep */
+			rep = 1;
+			i++;
+			break;
+		case P_CS:	/* segment prefix */
+		case P_SS:
+		case P_DS:
+		case P_ES:
+		case P_FS:
+		case P_GS:
+			segment = instr[i];
+			i++;
+			break;
+		case 0xf0:	/* LOCK - ignored */
+		case 0x67:	/* address size prefix - ignored */
+			i++;
+			break;
+		case 0x6c:	/* insb */
+			if (rep)
+				vm86_rep_ins(1);
+			else
+				vm86_ins(1);
+			i++;
+			goto out;
+		case 0x6d:	/* insw / insd */
+			if (rep) {
+				if (data32)
+					vm86_rep_ins(4);
+				else
+					vm86_rep_ins(2);
+			} else {
+				if (data32)
+					vm86_ins(4);
+				else
+					vm86_ins(2);
+			}
+			i++;
+			goto out;
+		case 0x6e:	/* outsb */
+			if (rep)
+				vm86_rep_outs(1, segment);
+			else
+				vm86_outs(1, segment);
+			i++;
+			goto out;
+		case 0x6f:	/* outsw / outsd */
+			if (rep) {
+				if (data32)
+					vm86_rep_outs(4, segment);
+				else
+					vm86_rep_outs(2, segment);
+			} else {
+				if (data32)
+					vm86_outs(4, segment);
+				else
+					vm86_outs(2, segment);
+			}
+			i++;
+			goto out;
+		case 0xe4:	/* inb xx */
+			asm volatile (
+				"inb %w1, %b0"
+				: "=a" (vm86.regs.eax)
+				: "d" (instr[i+1]), "0" (vm86.regs.eax));
+			i += 2;
+			goto out;
+		case 0xe5:	/* inw xx / ind xx */
+			if (data32) {
+				asm volatile (
+					"inl %w1, %0"
+					: "=a" (vm86.regs.eax)
+					: "d" (instr[i+1]),
+					  "0" (vm86.regs.eax));
+			} else {
+				asm volatile (
+					"inw %w1, %w0"
+					: "=a" (vm86.regs.eax)
+					: "d" (instr[i+1]),
+					  "0" (vm86.regs.eax));
+			}
+			i += 2;
+			goto out;
+
+		case 0xec:	/* inb dx */
+			asm volatile (
+				"inb %w1, %b0"
+	 			: "=a" (vm86.regs.eax)
+				: "d" (vm86.regs.edx), "0" (vm86.regs.eax));
+			i++;
+			goto out;
+		case 0xed:	/* inw dx / ind dx */
+			if (data32) {
+				asm volatile (
+					"inl %w1, %0"
+					: "=a" (vm86.regs.eax)
+					: "d" (vm86.regs.edx));
+			} else {
+				asm volatile (
+					"inw %w1, %w0"
+					: "=a" (vm86.regs.eax)
+					: "d" (vm86.regs.edx));
+			}
+			i++;
+			goto out;
+		case 0xe6:	/* outb xx */
+			asm volatile (
+				"outb %b0, %w1"
+				: /* no return value */
+				: "a" (vm86.regs.eax), "d" (instr[i+1]));
+			i += 2;
+			goto out;
+		case 0xe7:	/* outw xx / outd xx */
+			if (data32) {
+				asm volatile (
+					"outl %0, %w1"
+					: /* no return value */
+					: "a" (vm86.regs.eax),
+					  "d" (instr[i+1]));
+			} else {
+				asm volatile (
+					"outw %w0, %w1"
+					: /* no return value */
+					: "a" (vm86.regs.eax),
+					  "d" (instr[i+1]));
+			}
+			i += 2;
+			goto out;
+		case 0xee:	/* outb dx */
+			asm volatile (
+				"outb %b0, %w1"
+				: /* no return value */
+				: "a" (vm86.regs.eax), "d" (vm86.regs.edx));
+			i++;
+			goto out;
+		case 0xef:	/* outw dx / outd dx */
+			if (data32) {
+				asm volatile (
+					"outl %0, %w1"
+					: /* no return value */
+					: "a" (vm86.regs.eax),
+					  "d" (vm86.regs.edx));
+			} else {
+				asm volatile (
+					"outw %w0, %w1"
+					: /* no return value */
+					: "a" (vm86.regs.eax),
+					  "d" (vm86.regs.edx));
+			}
+			i++;
+			goto out;
+		default:
+			printk(KERN_ERR "vesafb: BUG, opcode 0x%x emulation "
+					"not supported (EIP: 0x%lx)\n",
+					instr[i], (u32)(vm86.regs.cs << 4) +
+					vm86.regs.eip);
+			ret = 1;
+			goto out;
+		}
+	}
+out: 	vm86.regs.eip += i;
+	return ret;
+}
+
+void vesafb_do_vm86(struct vm86_regs *regs)
+{
+	unsigned int ret;
+	u8 *retcode = (void*)RET_CODE_ADDR;
+
+	memset(&vm86,0,sizeof(vm86));
+	memcpy(&vm86.regs, regs, sizeof(struct vm86_regs));
+
+	/* The return code */
+	retcode[0] = 0xcd;  		/* int opcode */
+	retcode[1] = 0xff;		/* int number (255) */
+
+        /* We use int 0xff to get back to protected mode */
+	memset(&vm86.int_revectored, 0, sizeof(vm86.int_revectored));
+        ((unsigned char *)&vm86.int_revectored)[0xff / 8] |= (1 << (0xff % 8));
+
+	/*
+	 * We want to call int 0x10, so we set:
+	 *   CS = 0x42 = 0x10 * 4 + 2
+	 *   IP = 0x40 = 0x10 * 4
+	 * and SS:ESP. It's up to the caller to set the rest of the registers.
+	 */
+	vm86.regs.eflags = DEFAULT_VM86_FLAGS;
+	vm86.regs.cs = *(unsigned short *)0x42;
+	vm86.regs.eip = *(unsigned short *)0x40;
+	vm86.regs.ss = (STACK_ADDR >> 4);
+	vm86.regs.esp = ((STACK_ADDR & 0x0000f) + STACK_SIZE);
+
+	/* These will be fetched off the stack when we come to an iret in the
+	 * int's 0x10 code. */
+	VM86_PUSHW(DEFAULT_VM86_FLAGS);
+	VM86_PUSHW((RET_CODE_ADDR >> 4));	/* return code segment */
+	VM86_PUSHW((RET_CODE_ADDR & 0x0000f));	/* return code offset */
+
+	while(1) {
+		ret = vm86old(&vm86);
+
+		if (VM86_TYPE(ret) == VM86_INTx) {
+			int vint = VM86_ARG(ret);
+
+			/* If exit from vm86 was caused by int 0xff, then
+			 * we're done.. */
+			if (vint == 0xff)
+				goto out;
+
+			/* .. otherwise, we have to call the int handler
+			 * manually */
+			VM86_PUSHW(vm86.regs.eflags);
+			VM86_PUSHW(vm86.regs.cs);
+			VM86_PUSHW(vm86.regs.eip);
+
+			vm86.regs.cs = *(u16 *)((vint << 2) + 2);
+			vm86.regs.eip = *(u16 *)(vint << 2);
+			vm86.regs.eflags &= ~(VIF_MASK | TF_MASK);
+		} else if (VM86_TYPE(ret) == VM86_UNKNOWN) {
+			if (vm86_do_unknown())
+				goto out;
+		} else {
+			printk(KERN_ERR "vesafb: BUG, returned from "
+					"vm86 with %x (EIP: 0x%lx)\n",
+					ret, (u32)(vm86.regs.cs << 4) +
+					vm86.regs.eip);
+			goto out;
+		}
+	}
+
+out:	/* copy the registers' state back to the caller's struct */
+	memcpy(regs, &vm86.regs, sizeof(struct vm86_regs));
+}
+
+static int vesafb_remap_pfn_range(unsigned long start, unsigned long end,
+				  unsigned long pgoff, unsigned long prot,
+				  int type)
+{
+	struct vm_area_struct *vma;
+	struct mm_struct *mm = current->mm;
+	int ret = 0;
+
+	vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+	if (!vma)
+		return -ENOMEM;
+	memset(vma, 0, sizeof(*vma));
+	down_write(&mm->mmap_sem);
+	vma->vm_mm = mm;
+	vma->vm_start = start;
+	vma->vm_end = end;
+	vma->vm_flags = VM_READ | VM_WRITE | VM_EXEC;
+	vma->vm_flags |= mm->def_flags;
+	vma->vm_page_prot.pgprot = prot;
+	vma->vm_pgoff = pgoff;
+
+	if ((ret = insert_vm_struct(mm, vma))) {
+		up_write(&mm->mmap_sem);
+		kmem_cache_free(vm_area_cachep, vma);
+		return ret;
+	}
+
+	if (type) {
+		ret = zeromap_page_range(vma,
+					 vma->vm_start,
+					 vma->vm_end - vma->vm_start,
+					 vma->vm_page_prot);
+	} else {
+		vma->vm_flags |= VM_SHARED;
+		ret = remap_pfn_range(vma,
+				      vma->vm_start,
+				      vma->vm_pgoff,
+				      vma->vm_end - vma->vm_start,
+				      vma->vm_page_prot);
+	}
+	up_write(&mm->mmap_sem);
+	return ret;
+}
+
+static inline int vesafb_init_mem(void)
+{
+	int ret = 0;
+
+	/* The memory chunks we're remapping here should be multiples
+	 * of PAGE_SIZE. */
+	ret += vesafb_remap_pfn_range(0x00000, IVTBDA_SIZE, 0,
+				      PROT_READ | PROT_EXEC | PROT_WRITE, 0);
+	ret += vesafb_remap_pfn_range(IVTBDA_SIZE, REAL_MEM_SIZE, 0,
+				      PROT_READ | PROT_EXEC | PROT_WRITE, 1);
+	ret += vesafb_remap_pfn_range(0x9f000, 0x100000, 
+				      0x9f000 >> PAGE_SHIFT,
+				      PROT_READ | PROT_EXEC | PROT_WRITE, 0);
+	if (ret)
+		printk(KERN_ERR "vesafb thread: memory remapping failed\n");
+
+	return ret;
+}
+
+#define vesafb_get_string(str) \
+{ 									\
+	/* The address is in the form ssssoooo, where oooo = offset,	\
+	 * ssss = segment */						\
+	addr = ((p_vbe(tsk->buf)->str & 0xffff0000) >> 12) +		\
+		(p_vbe(tsk->buf)->str & 0x0000ffff);			\
+									\
+	/* The data is in ROM which is shared between processes, so we 	\
+	 * just translate the real mode address into one visible from 	\
+	 * kernel space */						\
+	if (addr >= 0xa0000) {						\
+		p_vbe(tsk->buf)->str = (u32) __va(addr);		\
+									\
+	/* The data is in the buffer, we just have to convert the	\
+	 * address so that it points into the buffer user provided. */	\
+	} else if (addr > BUF_ADDR && addr < BUF_ADDR +			\
+		   sizeof(struct vesafb_vbe_ib)) {			\
+		addr -= BUF_ADDR;					\
+		p_vbe(tsk->buf)->str = (u32) (tsk->buf + addr);		\
+									\
+	/* This should never happen: someone was insane enough to put	\
+	 * the data somewhere in RAM.. */				\
+	} else {							\
+		p_vbe(tsk->buf)->str = (u32) "";			\
+	}								\
+}
+
+void vesafb_handle_getvbeib(struct vesafb_task *tsk)
+{
+	int addr, res;
+
+	tsk->regs.es  = (BUF_ADDR >> 4);
+	tsk->regs.edi = (BUF_ADDR & 0x000f);
+	strncpy(p_vbe(BUF_ADDR)->vbe_signature, "VBE2", 4);
+
+	vesafb_do_vm86(&tsk->regs);
+	memcpy(tsk->buf, (void*)(BUF_ADDR), sizeof(struct vesafb_vbe_ib));
+
+	/* The OEM fields were not defined prior to VBE 2.0 */
+	if (p_vbe(tsk->buf)->vbe_version >= 0x200) {
+		vesafb_get_string(oem_string_ptr);
+		vesafb_get_string(oem_vendor_name_ptr);
+		vesafb_get_string(oem_product_name_ptr);
+		vesafb_get_string(oem_product_rev_ptr);
+	}
+
+	/* This is basically the same as vesafb_get_string() */
+	addr = ((p_vbe(tsk->buf)->mode_list_ptr & 0xffff0000) >> 12) +
+		(p_vbe(tsk->buf)->mode_list_ptr & 0x0000ffff);
+
+	if (addr >= 0xa0000) {
+		p_vbe(tsk->buf)->mode_list_ptr = (u32) __va(addr);
+	} else if (addr > BUF_ADDR && addr < BUF_ADDR +
+		   sizeof(struct vesafb_vbe_ib)) {
+		addr -= BUF_ADDR;
+		p_vbe(tsk->buf)->mode_list_ptr = (u32) (tsk->buf + addr);
+	} else {
+		res = 0;
+		printk(KERN_WARNING "vesafb: warning, copying modelist "
+				    "from somewhere in RAM!\n");
+		while (*(u16*)(addr+res) != 0xffff &&
+		       res < (sizeof(p_vbe(tsk->buf)->reserved) - 2)) {
+			*(u16*) ((u32)&(p_vbe(tsk->buf)->reserved) + res) =
+				*(u16*)(addr+res);
+			res += 2;
+		}
+		*(u16*) ((u32)&(p_vbe(tsk->buf)->reserved) + res) = 0xffff;
+	}
+}
+
+int vesafb_handle_tasks(void)
+{
+	struct vesafb_task *tsk;
+	struct list_head *curr, *next;
+	int ret = 0;
+
+	down(&vesafb_task_list_sem);
+	list_for_each_safe(curr, next, &vesafb_task_list) {
+		tsk = list_entry(curr, struct vesafb_task, node);
+
+		if (tsk->flags & TF_EXIT) {
+			ret = 1;
+			goto task_done;
+		}
+		if (tsk->flags & TF_GETVBEIB) {
+			vesafb_handle_getvbeib(tsk);
+			goto task_done;
+		}
+		/* Do we need to store a pointer to the buffer in ES:EDI? */
+		if (tsk->flags & TF_BUF_DI) {
+			tsk->regs.es  = (BUF_ADDR >> 4);
+			tsk->regs.edi = (BUF_ADDR & 0x000f);
+		}
+		/* Sometimes the pointer has to be in ES:EBX. */
+		if (tsk->flags & TF_BUF_BX) {
+			tsk->regs.es  = (BUF_ADDR >> 4);
+			tsk->regs.ebx = (BUF_ADDR & 0x000f);
+		}
+		if (tsk->flags & (TF_BUF_DI | TF_BUF_BX))
+			memcpy((void*)BUF_ADDR, tsk->buf, tsk->buf_len);
+
+		vesafb_do_vm86(&tsk->regs);
+
+		if (tsk->flags & TF_RETURN_BUF)
+			memcpy(tsk->buf, (void*)BUF_ADDR, tsk->buf_len);
+
+task_done:	list_del(curr);
+		complete(&tsk->done);
+	}
+
+	/* If we're going to kill this thread, don't allow any elements
+	 * to be added to the task list. */
+	if (!ret)
+		up(&vesafb_task_list_sem);
+
+	return ret;
+}
+
+/*
+ * This 'hybrid' thread serves as a backend for vesafb-tng, handling all vm86
+ * calls. It is started as a kernel thread. It then creates its own mm struct,
+ * thus separating itself from any userspace processes. At this moment, it
+ * stops being a kernel thread (kernel threads have mm = NULL) and becomes
+ * a 'hybrid' thread -- one that has full access to kernel space, yet runs
+ * with its own address space.
+ *
+ * This is necessary because in order to make vm86 calls some parts of the
+ * first 1MB of RAM have to be setup to mimic the real mode. These are:
+ *  - interrupt vector table	[0x00000-0x003ff]
+ *  - BIOS data area		[0x00400-0x004ff]
+ *  - Extended BIOS data area	[0x9fc00-0x9ffff]
+ *  - the video RAM		[0xa0000-0xbffff]
+ *  - video BIOS		[0xc0000-0xcffff]
+ *  - motherboard BIOS		[0xf0000-0xfffff]
+ */
+int vesafb_thread(void *unused)
+{
+	int err = 0;
+
+	set_fs(KERNEL_DS);
+	daemonize("vesafb");
+
+	if (set_new_mm()) {
+		err = -ENOMEM;
+		goto thr_end;
+	}
+	if (vesafb_init_mem()) {
+		err = -ENOMEM;
+		goto thr_end;
+	}
+
+	DPRINTK("started vesafb thread\n");
+
+	/* Having an IO bitmap makes things faster as we avoid GPFs
+	 * when running vm86 code. We can live if it fails, though,
+	 * so don't bother checking for errors. */
+	ioperm(0,1024,1);
+	set_user_nice(current, -10);
+
+	complete(&vesafb_th_completion);
+
+	while (1) {
+		if (vesafb_handle_tasks())
+			break;
+		wait_event_interruptible(vesafb_wait,
+					 !list_empty(&vesafb_task_list));
+		try_to_freeze();
+	}
+
+out:	DPRINTK("exiting the vesafb thread\n");
+	vesafb_pid = -1;
+
+	/* Now that all callers know this thread is no longer running
+	 * (pid < 0), allow them to continue. */
+	up(&vesafb_task_list_sem);
+	return err;
+thr_end:
+	down(&vesafb_task_list_sem);
+	complete(&vesafb_th_completion);
+	goto out;	
+}
+
+int vesafb_queue_task(struct vesafb_task *tsk)
+{
+	down(&vesafb_task_list_sem);
+	if (vesafb_pid < 0)
+		return -1;
+	list_add_tail(&tsk->node, &vesafb_task_list);
+	up(&vesafb_task_list_sem);
+	wake_up(&vesafb_wait);
+	return 0;
+}
+
+int vesafb_wait_for_thread(void)
+{
+	/* PID 0 means that the thread is still initializing. */
+	if (vesafb_pid < 0)
+		return -1;
+	wait_for_completion(&vesafb_th_completion);
+	return 0;
+}
+
+int __init vesafb_init_thread(void)
+{
+	vesafb_pid = kernel_thread(vesafb_thread,NULL,0);
+	return 0;
+}
+
+#ifdef MODULE
+void __exit vesafb_kill_thread(void)
+{
+	struct vesafb_task *tsk;
+	if (vesafb_pid <= 0)
+		return;
+
+	vesafb_create_task(tsk);
+	if (!tsk)
+		return;
+	tsk->flags |= TF_EXIT;
+	vesafb_queue_task(tsk);
+	vesafb_wait_for_task(tsk);
+	kfree(tsk);
+	return;
+}
+module_exit(vesafb_kill_thread);
+#endif
+module_init(vesafb_init_thread);
+
+EXPORT_SYMBOL_GPL(vesafb_queue_task);
+EXPORT_SYMBOL_GPL(vesafb_wait_for_thread);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Januszewski");
+
--- linux-2.6.18.3.orig/drivers/video/vesafb-tng.c	1969-12-31 21:00:00.000000000 \
-0300
+++ linux-2.6.18.3/drivers/video/vesafb-tng.c	2006-11-26 21:08:46.000000000 -0200
@@ -0,0 +1,1598 @@
+/*
+ * Framebuffer driver for VBE 2.0+ compliant graphic boards
+ *
+ * (c) 2004-2006 Michal Januszewski <spock@gentoo.org>
+ *     Based upon vesafb code by Gerd Knorr <kraxel@goldbach.in-berlin.de>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/completion.h>
+#include <linux/platform_device.h>
+#include <video/edid.h>
+#include <video/vesa.h>
+#include <video/vga.h>
+#include <asm/io.h>
+#include <asm/mtrr.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include "edid.h"
+
+#define dac_reg	(0x3c8)
+#define dac_val	(0x3c9)
+
+#define VESAFB_NEED_EXACT_RES 	1
+#define VESAFB_NEED_EXACT_DEPTH 2
+
+/* --------------------------------------------------------------------- */
+
+static struct fb_var_screeninfo vesafb_defined __initdata = {
+	.activate	= FB_ACTIVATE_NOW,
+	.height		= 0,
+	.width		= 0,
+	.right_margin	= 32,
+	.upper_margin	= 16,
+	.lower_margin	= 4,
+	.vsync_len	= 4,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo vesafb_fix __initdata = {
+	.id	= "VESA VGA",
+	.type	= FB_TYPE_PACKED_PIXELS,
+	.accel	= FB_ACCEL_NONE,
+};
+
+static int  mtrr       = 0;	/* disable mtrr by default */
+static int  blank      = 1;     /* enable blanking by default */
+static int  ypan       = 0;	/* 0 - nothing, 1 - ypan, 2 - ywrap */
+static int  pmi_setpal = 1;	/* pmi for palette changes */
+static u16  *pmi_base  = NULL;  /* protected mode interface location */
+static void (*pmi_start)(void) = NULL;
+static void (*pmi_pal)(void)   = NULL;
+static struct vesafb_vbe_ib  vbe_ib;
+static struct vesafb_mode_ib *vbe_modes;
+static int                   vbe_modes_cnt = 0;
+static struct fb_info	     *vesafb_info = NULL;
+static int  nocrtc		    = 0; /* ignore CRTC settings */
+static int  noedid       __initdata = 0; /* don't try DDC transfers */
+static int  vram_remap   __initdata = 0; /* set amount of memory to be used */
+static int  vram_total   __initdata = 0; /* set total amount of memory */
+static u16  maxclk       __initdata = 0; /* maximum pixel clock */
+static u16  maxvf        __initdata = 0; /* maximum vertical frequency */
+static u16  maxhf        __initdata = 0; /* maximum horizontal frequency */
+static int  gtf          __initdata = 0; /* forces use of the GTF */
+static char *mode_option __initdata = NULL;
+static u16  vbemode      __initdata = 0;
+
+/* --------------------------------------------------------------------- */
+
+static int vesafb_find_vbe_mode(int xres, int yres, int depth,
+				unsigned char flags)
+{
+	int i, match = -1, h = 0, d = 0x7fffffff;
+
+	for (i = 0; i < vbe_modes_cnt; i++) {
+		h = abs(vbe_modes[i].x_res - xres) +
+		    abs(vbe_modes[i].y_res - yres) +
+		    abs(depth - vbe_modes[i].depth);
+		if (h == 0)
+			return i;
+		if (h < d || (h == d && vbe_modes[i].depth > depth)) {
+			d = h;
+			match = i;
+		}
+	}
+	i = 1;
+
+	if (flags & VESAFB_NEED_EXACT_DEPTH && vbe_modes[match].depth != depth)
+		i = 0;
+	if (flags & VESAFB_NEED_EXACT_RES && d > 24)
+		i = 0;
+	if (i != 0)
+		return match;
+	else
+		return -1;
+}
+
+static int vesafb_pan_display(struct fb_var_screeninfo *var,
+                              struct fb_info *info)
+{
+	int offset;
+
+	offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
+
+	/* It turns out it's not the best idea to do panning via vm86,
+	 * so we only allow it if we have a PMI. */
+	if (pmi_start) {
+		__asm__ __volatile__(
+			"call *(%%edi)"
+			: /* no return value */
+			: "a" (0x4f07),         /* EAX */
+			  "b" (0),              /* EBX */
+			  "c" (offset),         /* ECX */
+			  "d" (offset >> 16),   /* EDX */
+			  "D" (&pmi_start));    /* EDI */
+	}
+	return 0;
+}
+
+static int vesafb_blank(int blank, struct fb_info *info)
+{
+	struct vesafb_task *tsk;
+	int err = 1;
+
+	if (vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
+		int loop = 10000;
+		u8 seq = 0, crtc17 = 0;
+
+		if (blank == FB_BLANK_POWERDOWN) {
+			seq = 0x20;
+			crtc17 = 0x00;
+			err = 0;
+		} else {
+			seq = 0x00;
+			crtc17 = 0x80;
+			err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
+		}
+
+		vga_wseq(NULL, 0x00, 0x01);
+		seq |= vga_rseq(NULL, 0x01) & ~0x20;
+		vga_wseq(NULL, 0x00, seq);
+
+		crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
+		while (loop--);
+		vga_wcrt(NULL, 0x17, crtc17);
+		vga_wseq(NULL, 0x00, 0x03);
+	} else {
+		vesafb_create_task (tsk);
+		if (!tsk)
+			return -ENOMEM;
+		tsk->regs.eax = 0x4f10;
+		switch (blank) {
+		case FB_BLANK_UNBLANK:
+			tsk->regs.ebx = 0x0001;
+			break;
+		case FB_BLANK_NORMAL:
+			tsk->regs.ebx = 0x0101;	/* standby */
+			break;
+		case FB_BLANK_POWERDOWN:
+			tsk->regs.ebx = 0x0401;	/* powerdown */
+			break;
+		default:
+			goto out;
+		}
+		tsk->flags = TF_CALL;
+		if (!vesafb_queue_task (tsk))
+			vesafb_wait_for_task(tsk);
+
+		if ((tsk->regs.eax & 0xffff) == 0x004f)
+			err = 0;
+out:		kfree(tsk);
+	}
+	return err;
+}
+
+static int vesafb_setpalette(struct vesafb_pal_entry *entries, int count,
+			     int start, struct fb_info *info)
+{
+	struct vesafb_task *tsk;
+	int i = ((struct vesafb_par*)info->par)->mode_idx;
+	int ret = 0;
+
+	/* We support palette modifications for 8 bpp modes only, so
+	 * there can never be more than 256 entries. */
+	if (start + count > 256)
+		return -EINVAL;
+
+	/* Use VGA registers if mode is VGA-compatible. */
+	if (i >= 0 && i < vbe_modes_cnt &&
+	    vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
+		for (i = 0; i < count; i++) {
+			outb_p(start + i,        dac_reg);
+			outb_p(entries[i].red,   dac_val);
+			outb_p(entries[i].green, dac_val);
+			outb_p(entries[i].blue,  dac_val);
+		}
+	} else if (pmi_setpal) {
+		__asm__ __volatile__(
+		"call *(%%esi)"
+		: /* no return value */
+		: "a" (0x4f09),         /* EAX */
+		  "b" (0),              /* EBX */
+		  "c" (count),          /* ECX */
+		  "d" (start),          /* EDX */
+		  "D" (entries),        /* EDI */
+		  "S" (&pmi_pal));      /* ESI */
+	} else {
+		vesafb_create_task (tsk);
+		if (!tsk)
+			return -ENOMEM;
+		tsk->regs.eax = 0x4f09;
+		tsk->regs.ebx = 0x0;
+		tsk->regs.ecx = count;
+		tsk->regs.edx = start;
+		tsk->buf = entries;
+		tsk->buf_len = sizeof(struct vesafb_pal_entry) * count;
+		tsk->flags = TF_CALL | TF_BUF_DI;
+
+		if (!vesafb_queue_task (tsk))
+			vesafb_wait_for_task(tsk);
+		if ((tsk->regs.eax & 0xffff) != 0x004f)
+			ret = 1;
+		kfree(tsk);
+	}
+	return ret;
+}
+
+static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			    unsigned blue, unsigned transp,
+			    struct fb_info *info)
+{
+	struct vesafb_pal_entry entry;
+	int shift = 16 - info->var.green.length;
+	int ret = 0;
+
+	if (regno >= info->cmap.len)
+		return -EINVAL;
+
+	if (info->var.bits_per_pixel == 8) {
+		entry.red   = red   >> shift;
+		entry.green = green >> shift;
+		entry.blue  = blue  >> shift;
+		entry.pad   = 0;
+
+		ret = vesafb_setpalette(&entry, 1, regno, info);
+	} else if (regno < 16) {
+		switch (info->var.bits_per_pixel) {
+		case 16:
+			if (info->var.red.offset == 10) {
+				/* 1:5:5:5 */
+				((u32*) (info->pseudo_palette))[regno] =
+						((red   & 0xf800) >>  1) |
+						((green & 0xf800) >>  6) |
+						((blue  & 0xf800) >> 11);
+			} else {
+				/* 0:5:6:5 */
+				((u32*) (info->pseudo_palette))[regno] =
+						((red   & 0xf800)      ) |
+						((green & 0xfc00) >>  5) |
+						((blue  & 0xf800) >> 11);
+			}
+			break;
+
+		case 24:
+		case 32:
+			red   >>= 8;
+			green >>= 8;
+			blue  >>= 8;
+			((u32 *)(info->pseudo_palette))[regno] =
+				(red   << info->var.red.offset)   |
+				(green << info->var.green.offset) |
+				(blue  << info->var.blue.offset);
+			break;
+		}
+	}
+	return ret;
+}
+
+static int vesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+	struct vesafb_pal_entry *entries;
+	int shift = 16 - info->var.green.length;
+	int i, ret = 0;
+
+	if (info->var.bits_per_pixel == 8) {
+		if (cmap->start + cmap->len > info->cmap.start +
+		    info->cmap.len || cmap->start < info->cmap.start)
+			return -EINVAL;
+
+		entries = vmalloc(sizeof(struct vesafb_pal_entry) * cmap->len);
+		if (!entries)
+			return -ENOMEM;
+		for (i = 0; i < cmap->len; i++) {
+			entries[i].red   = cmap->red[i]   >> shift;
+			entries[i].green = cmap->green[i] >> shift;
+			entries[i].blue  = cmap->blue[i]  >> shift;
+			entries[i].pad   = 0;
+		}
+		ret = vesafb_setpalette(entries, cmap->len, cmap->start, info);
+		vfree(entries);
+	} else {
+		/* For modes with bpp > 8, we only set the pseudo palette in
+		 * the fb_info struct. We rely on vesafb_setcolreg to do all
+		 * sanity checking. */
+		for (i = 0; i < cmap->len; i++) {
+			ret += vesafb_setcolreg(cmap->start + i, cmap->red[i],
+						cmap->green[i], cmap->blue[i],
+						0, info);
+		}
+	}
+	return ret;
+}
+
+static int vesafb_set_par(struct fb_info *info)
+{
+	struct vesafb_par *par = (struct vesafb_par *) info->par;
+	struct vesafb_task *tsk;
+	struct vesafb_crtc_ib *crtc = NULL;
+	struct vesafb_mode_ib *mode = NULL;
+	int i, err = 0, depth = info->var.bits_per_pixel;
+
+	if (depth > 8 && depth != 32)
+		depth = info->var.red.length + info->var.green.length +
+			info->var.blue.length;
+
+	i = vesafb_find_vbe_mode(info->var.xres, info->var.yres, depth,
+				 VESAFB_NEED_EXACT_RES |
+				 VESAFB_NEED_EXACT_DEPTH);
+	if (i >= 0)
+		mode = &vbe_modes[i];
+	else
+		return -EINVAL;
+
+	vesafb_create_task (tsk);
+	if (!tsk)
+		return -ENOMEM;
+	tsk->regs.eax = 0x4f02;
+	tsk->regs.ebx = mode->mode_id | 0x4000;		/* use LFB */
+	tsk->flags = TF_CALL;
+
+	if (vbe_ib.vbe_version >= 0x0300 && !nocrtc &&
+	    info->var.pixclock != 0) {
+		tsk->regs.ebx |= 0x0800; 		/* use CRTC data */
+		tsk->flags |= TF_BUF_DI;
+		crtc = kmalloc(sizeof(struct vesafb_crtc_ib), GFP_KERNEL);
+		if (!crtc) {
+			err = -ENOMEM;
+			goto out;
+		}
+		crtc->horiz_start = info->var.xres + info->var.right_margin;
+		crtc->horiz_end	  = crtc->horiz_start + info->var.hsync_len;
+		crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
+
+		crtc->vert_start  = info->var.yres + info->var.lower_margin;
+		crtc->vert_end    = crtc->vert_start + info->var.vsync_len;
+		crtc->vert_total  = crtc->vert_end + info->var.upper_margin;
+
+		crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
+		crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
+				     (crtc->vert_total * crtc->horiz_total)));
+		crtc->flags = 0;
+
+		if (info->var.vmode & FB_VMODE_DOUBLE)
+			crtc->flags |= 0x1;
+		if (info->var.vmode & FB_VMODE_INTERLACED)
+			crtc->flags |= 0x2;
+		if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
+			crtc->flags |= 0x4;
+		if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
+			crtc->flags |= 0x8;
+		memcpy(&par->crtc, crtc, sizeof(struct vesafb_crtc_ib));
+	} else
+		memset(&par->crtc, 0, sizeof(struct vesafb_crtc_ib));
+
+	tsk->buf = (void*)crtc;
+	tsk->buf_len = sizeof(struct vesafb_crtc_ib);
+
+	if (vesafb_queue_task (tsk)) {
+		err = -EINVAL;
+		goto out;
+	}
+	vesafb_wait_for_task(tsk);
+
+	if ((tsk->regs.eax & 0xffff) != 0x004f) {
+		printk(KERN_ERR "vesafb: mode switch failed (eax: 0x%lx)\n",
+				tsk->regs.eax);
+		err = -EINVAL;
+		goto out;
+	}
+	par->mode_idx = i;
+
+	/* For 8bpp modes, always try to set the DAC to 8 bits. */
+	if (vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
+	    mode->bits_per_pixel <= 8) {
+		vesafb_reset_task(tsk);
+		tsk->flags = TF_CALL;
+		tsk->regs.eax = 0x4f08;
+		tsk->regs.ebx = 0x0800;
+
+		if (!vesafb_queue_task (tsk))
+			vesafb_wait_for_task(tsk);
+
+		if ((tsk->regs.eax & 0xffff) != 0x004f ||
+		    ((tsk->regs.ebx & 0xff00) >> 8) != 8) {
+			/* We've failed to set the DAC palette format -
+			 * time to correct var. */
+			info->var.red.length    = 6;
+			info->var.green.length  = 6;
+			info->var.blue.length   = 6;
+		}
+	}
+
+	info->fix.visual = (info->var.bits_per_pixel == 8) ?
+		           FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+	info->fix.line_length = mode->bytes_per_scan_line;
+
+	DPRINTK("set new mode %dx%d-%d (0x%x)\n",
+		info->var.xres, info->var.yres, info->var.bits_per_pixel,
+		mode->mode_id);
+
+out:	if (crtc != NULL)
+		kfree(crtc);
+	kfree(tsk);
+
+	return err;
+}
+
+static void vesafb_setup_var(struct fb_var_screeninfo *var, struct fb_info *info,
+			     struct vesafb_mode_ib *mode)
+{
+	var->xres = mode->x_res;
+	var->yres = mode->y_res;
+	var->xres_virtual = mode->x_res;
+	var->yres_virtual = (ypan) ?
+			      info->fix.smem_len / mode->bytes_per_scan_line :
+			      mode->y_res;
+	var->xoffset = 0;
+	var->yoffset = 0;
+	var->bits_per_pixel = mode->bits_per_pixel;
+
+	if (var->bits_per_pixel == 15)
+		var->bits_per_pixel = 16;
+
+	if (var->bits_per_pixel > 8) {
+		var->red.offset    = mode->red_off;
+		var->red.length    = mode->red_len;
+		var->green.offset  = mode->green_off;
+		var->green.length  = mode->green_len;
+		var->blue.offset   = mode->blue_off;
+		var->blue.length   = mode->blue_len;
+		var->transp.offset = mode->rsvd_off;
+		var->transp.length = mode->rsvd_len;
+
+		DPRINTK("directcolor: size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
+			mode->rsvd_len,
+			mode->red_len,
+			mode->green_len,
+			mode->blue_len,
+			mode->rsvd_off,
+			mode->red_off,
+			mode->green_off,
+			mode->blue_off);
+	} else {
+		var->red.offset    = 0;
+		var->green.offset  = 0;
+		var->blue.offset   = 0;
+		var->transp.offset = 0;
+
+		/* We're assuming that we can switch the DAC to 8 bits. If
+		 * this proves to be incorrect, we'll update the fields
+		 * later in set_par(). */
+		if (vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
+			var->red.length    = 8;
+			var->green.length  = 8;
+			var->blue.length   = 8;
+			var->transp.length = 0;
+		} else {
+			var->red.length    = 6;
+			var->green.length  = 6;
+			var->blue.length   = 6;
+			var->transp.length = 0;
+		}
+	}
+}
+
+static void inline vesafb_check_limits(struct fb_var_screeninfo *var,
+		 		       struct fb_info *info)
+{
+	struct fb_videomode *mode;
+
+	if (!var->pixclock)
+		return;
+	if (vbe_ib.vbe_version < 0x0300) {
+		fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
+		return;
+	}
+	if (!fb_validate_mode(var, info))
+		return;
+	mode = fb_find_best_mode(var, &info->modelist);
+	if (mode) {
+		DPRINTK("find_best_mode: %d %d @ %d (vmode: %d)\n",
+			mode->xres, mode->yres, mode->refresh, mode->vmode);
+		if (mode->xres == var->xres && mode->yres == var->yres &&
+		    !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
+			fb_videomode_to_var(var, mode);
+			return;
+		}
+	}
+	if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
+		return;
+	/* Use default refresh rate */
+	var->pixclock = 0;
+}
+
+static int vesafb_check_var(struct fb_var_screeninfo *var,
+			    struct fb_info *info)
+{
+	int match = -1;
+	int depth = var->red.length + var->green.length + var->blue.length;
+
+	/* Various apps will use bits_per_pixel to set the color depth,
+	 * which is theoretically incorrect, but which we'll try to handle
+	 * here. */
+	if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
+		depth = var->bits_per_pixel;
+	match = vesafb_find_vbe_mode(var->xres, var->yres, depth,
+				     VESAFB_NEED_EXACT_RES);
+
+	if (match == -1) {
+		DPRINTK("vesafb: mode %dx%d-%d not found\n", var->xres,
+			var->yres, depth);
+		return -EINVAL;
+	}
+
+	vesafb_setup_var(var, info, &vbe_modes[match]);
+	DPRINTK("found mode 0x%x (%dx%d-%dbpp)\n",
+		vbe_modes[match].mode_id, vbe_modes[match].x_res,
+		vbe_modes[match].y_res, vbe_modes[match].depth);
+
+	/* Check whether we have remapped enough memory for this mode. */
+	if (var->yres * vbe_modes[match].bytes_per_scan_line >
+	    info->fix.smem_len) {
+		return -EINVAL;
+	}
+
+	if ((var->vmode & FB_VMODE_DOUBLE) &&
+	    !(vbe_modes[match].mode_attr & 0x100))
+		var->vmode &= ~FB_VMODE_DOUBLE;
+	if ((var->vmode & FB_VMODE_INTERLACED) &&
+	    !(vbe_modes[match].mode_attr & 0x200))
+		var->vmode &= ~FB_VMODE_INTERLACED;
+	vesafb_check_limits(var, info);
+	return 0;
+}
+
+static int vesafb_open(struct fb_info *info, int user)
+{
+	struct vesafb_task *tsk = NULL;
+	struct vesafb_par *par = info->par;
+	int cnt = atomic_read(&par->ref_count);
+
+	if (!cnt) {
+		vesafb_create_task(tsk);
+		if (!tsk)
+			goto out;
+
+		/* Get the VBE state buffer size. We want all available
+		 * hardware state data (CL = 0x0f). */
+		tsk->regs.eax = 0x4f04;
+		tsk->regs.ecx = 0x000f;
+		tsk->regs.edx = 0x0000;
+		tsk->flags = TF_CALL;
+
+		if (vesafb_queue_task(tsk))
+			goto out;
+	
+		vesafb_wait_for_task(tsk);
+		
+		if ((tsk->regs.eax & 0xffff) != 0x004f) {
+			printk(KERN_WARNING "vesafb: VBE state buffer size "
+				"cannot be determined (eax: 0x%lx)\n",
+				tsk->regs.eax);
+			goto out;
+		}
+
+		par->vbe_state_size = 64 * (tsk->regs.ebx & 0xffff);
+		par->vbe_state = kzalloc(par->vbe_state_size, GFP_KERNEL);
+		if (!par->vbe_state) 
+			goto out;
+
+		vesafb_reset_task(tsk);
+		tsk->regs.eax = 0x4f04;
+		tsk->regs.ecx = 0x000f;
+		tsk->regs.edx = 0x0001;
+		tsk->flags = TF_CALL | TF_BUF_BX | TF_RETURN_BUF;
+		tsk->buf = (void*)(par->vbe_state);
+		tsk->buf_len = par->vbe_state_size;
+
+		if (vesafb_queue_task(tsk))
+			goto getstate_failed;
+		vesafb_wait_for_task(tsk);
+
+		if ((tsk->regs.eax & 0xffff) != 0x004f) {
+			printk(KERN_WARNING "vesafb: VBE get state call "
+				"failed (eax: 0x%lx)\n", tsk->regs.eax);
+			goto getstate_failed;
+		}
+	}
+out:
+	atomic_inc(&par->ref_count);
+	if (tsk)
+		kfree(tsk);
+	return 0;
+
+getstate_failed:
+	kfree(par->vbe_state);
+	par->vbe_state = NULL;
+	par->vbe_state_size = 0;
+	goto out;
+}
+
+static int vesafb_release(struct fb_info *info, int user)
+{
+	struct vesafb_task *tsk = NULL;
+	struct vesafb_par *par = info->par;
+	int cnt = atomic_read(&par->ref_count);
+
+	if (!cnt)
+		return -EINVAL;
+	
+	if (cnt == 1 && par->vbe_state && par->vbe_state_size) {
+		vesafb_create_task(tsk);
+		if (!tsk)
+			goto out;
+
+		tsk->regs.eax = 0x0003;
+		tsk->regs.ebx = 0x0000;
+		tsk->flags = TF_CALL;
+
+		if (vesafb_queue_task(tsk))
+			goto out;
+	
+		vesafb_wait_for_task(tsk);
+
+		vesafb_reset_task(tsk);
+		tsk->regs.eax = 0x4f04;
+		tsk->regs.ecx = 0x000f;
+		tsk->regs.edx = 0x0002;
+		tsk->buf = (void*)(par->vbe_state);
+		tsk->buf_len = par->vbe_state_size;
+		tsk->flags = TF_CALL | TF_BUF_BX;
+
+		if (vesafb_queue_task(tsk))
+			goto out;
+	
+		vesafb_wait_for_task(tsk);
+
+		if ((tsk->regs.eax & 0xffff) != 0x004f)
+			printk(KERN_WARNING "vesafb: VBE state restore call "
+				"failed (eax: 0x%lx)\n",
+				tsk->regs.eax);
+	}
+out:
+	atomic_dec(&par->ref_count);
+	if (tsk)
+		kfree(tsk);
+	return 0;
+}
+
+static int __init vesafb_probe(struct platform_device *device);
+
+static struct fb_ops vesafb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_open	= vesafb_open,
+	.fb_release	= vesafb_release,
+	.fb_setcolreg	= vesafb_setcolreg,
+	.fb_setcmap	= vesafb_setcmap,
+	.fb_pan_display	= vesafb_pan_display,
+	.fb_blank       = vesafb_blank,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_check_var	= vesafb_check_var,
+	.fb_set_par	= vesafb_set_par
+};
+
+static struct platform_driver vesafb_driver = {
+	.probe	= vesafb_probe,
+	.driver	= {
+		.name	= "vesafb",
+	},
+};
+
+static struct platform_device *vesafb_device;
+ 
+#ifndef MODULE
+int __init vesafb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	DPRINTK("options %s\n",options);
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt) continue;
+
+		DPRINTK("this_opt: %s\n",this_opt);
+
+		if (! strcmp(this_opt, "redraw"))
+			ypan=0;
+		else if (! strcmp(this_opt, "ypan"))
+			ypan=1;
+		else if (! strcmp(this_opt, "ywrap"))
+			ypan=2;
+		else if (! strcmp(this_opt, "vgapal"))
+			pmi_setpal=0;
+		else if (! strcmp(this_opt, "pmipal"))
+			pmi_setpal=1;
+		else if (! strncmp(this_opt, "mtrr:", 5))
+			mtrr = simple_strtoul(this_opt+5, NULL, 0);
+		else if (! strcmp(this_opt, "nomtrr"))
+			mtrr=0;
+		else if (! strcmp(this_opt, "nocrtc"))
+			nocrtc=1;
+		else if (! strcmp(this_opt, "noedid"))
+			noedid=1;
+		else if (! strcmp(this_opt, "noblank"))
+			blank=0;
+		else if (! strcmp(this_opt, "gtf"))
+			gtf=1;
+		else if (! strncmp(this_opt, "vtotal:", 7))
+			vram_total = simple_strtoul(this_opt + 7, NULL, 0);
+		else if (! strncmp(this_opt, "vremap:", 7))
+			vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
+		else if (! strncmp(this_opt, "maxhf:", 6))
+			maxhf = simple_strtoul(this_opt + 6, NULL, 0);
+		else if (! strncmp(this_opt, "maxvf:", 6))
+			maxvf = simple_strtoul(this_opt + 6, NULL, 0);
+		else if (! strncmp(this_opt, "maxclk:", 7))
+			maxclk = simple_strtoul(this_opt + 7, NULL, 0);
+		else if (! strncmp(this_opt, "vbemode:", 8))
+			vbemode = simple_strtoul(this_opt + 8, NULL,0);
+		else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
+			DPRINTK("mode_option: %s\n",this_opt);
+			mode_option = this_opt;
+		} else {
+			printk(KERN_WARNING
+			       "vesafb: unrecognized option %s\n", this_opt);
+		}
+	}
+
+	return 0;
+}
+#endif /* !MODULE */
+
+static int vesafb_read_proc_modes(char *buf, char **start, off_t offset,
+			    	  int len, int *eof, void *private)
+{
+	int clen = 0, i;
+
+	for (i = 0; i < vbe_modes_cnt; i++) {
+		clen += sprintf(buf + clen, "%dx%d-%d\n", vbe_modes[i].x_res,
+				vbe_modes[i].y_res, vbe_modes[i].depth);
+	}
+	*start = buf + offset;
+
+	if (clen > offset) {
+		clen -= offset;
+	} else {
+		clen = 0;
+	}
+	return clen;
+}
+
+static int vesafb_read_proc_vbe_info(char *buf, char **start, off_t offset,
+			    	     int len, int *eof, void *private)
+{
+	int clen = 0;
+
+	clen += sprintf(buf + clen, "Version:    %d.%d\n",
+			((vbe_ib.vbe_version & 0xff00) >> 8),
+			vbe_ib.vbe_version & 0xff);
+	clen += sprintf(buf + clen, "Vendor:     %s\n",
+			(char*)vbe_ib.oem_vendor_name_ptr);
+	clen += sprintf(buf + clen, "Product:    %s\n",
+			(char*)vbe_ib.oem_product_name_ptr);
+	clen += sprintf(buf + clen, "OEM rev:    %s\n",
+			(char*)vbe_ib.oem_product_rev_ptr);
+	clen += sprintf(buf + clen, "OEM string: %s\n",
+			(char*)vbe_ib.oem_string_ptr);
+
+	*start = buf + offset;
+
+	if (clen > offset) {
+		clen -= offset;
+	} else {
+		clen = 0;
+	}
+	return clen;
+}
+
+static int __init inline vesafb_vbe_getinfo(struct vesafb_task *tsk)
+{
+	tsk->regs.eax = 0x4f00;
+	tsk->flags = TF_CALL | TF_GETVBEIB;
+	tsk->buf = &vbe_ib;
+	tsk->buf_len = sizeof(vbe_ib);
+	if (vesafb_queue_task (tsk))
+		return -EINVAL;
+	vesafb_wait_for_task(tsk);
+
+	if (vbe_ib.vbe_version < 0x0200) {
+		printk(KERN_ERR "vesafb: Sorry, pre-VBE 2.0 cards are "
+				"not supported.\n");
+		return -EINVAL;
+	}
+
+	if ((tsk->regs.eax & 0xffff) != 0x004f) {
+		printk(KERN_ERR "vesafb: Getting mode info block failed "
+				"(eax=0x%x)\n", (u32)tsk->regs.eax);
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "vesafb: %s, %s, %s (OEM: %s)\n",
+		(char*)vbe_ib.oem_vendor_name_ptr,
+		(char*)vbe_ib.oem_product_name_ptr,
+		(char*)vbe_ib.oem_product_rev_ptr,
+		(char*)vbe_ib.oem_string_ptr);
+
+	printk(KERN_INFO "vesafb: VBE version: %d.%d\n",
+			 ((vbe_ib.vbe_version & 0xff00) >> 8),
+			 vbe_ib.vbe_version & 0xff);
+	return 0;
+}
+
+static int __init inline vesafb_vbe_getmodes(struct vesafb_task *tsk)
+{
+	u16 *mode = 0;
+	int off = 0;
+
+	/* Count available modes. */
+	mode = (u16*)vbe_ib.mode_list_ptr;
+	while (*mode != 0xffff) {
+		vbe_modes_cnt++;
+		mode++;
+	}
+
+	vbe_modes = kmalloc(sizeof(struct vesafb_mode_ib)*
+			    vbe_modes_cnt, GFP_KERNEL);
+	if (!vbe_modes)
+		return -ENOMEM;
+
+	/* Get mode info for all available modes. */
+	mode = (u16*)vbe_ib.mode_list_ptr;
+
+	while (*mode != 0xffff) {
+		struct vesafb_mode_ib *mib;
+
+		vesafb_reset_task(tsk);
+		tsk->regs.eax = 0x4f01;
+		tsk->regs.ecx = (u32) *mode;
+		tsk->flags = TF_CALL | TF_RETURN_BUF | TF_BUF_DI;
+		tsk->buf = vbe_modes+off;
+		tsk->buf_len = sizeof(struct vesafb_mode_ib);
+		if (vesafb_queue_task(tsk))
+			return -EINVAL;
+		vesafb_wait_for_task(tsk);
+		mib = p_mode(tsk->buf);
+		mib->mode_id = *mode;
+
+		/* We only want modes that are supported with the currennt
+		 * hardware configuration (D0), color (D3), graphics (D4)
+		 * and that have support for the LFB (D7). */
+		if ((mib->mode_attr & 0x99) == 0x99 &&
+		    mib->bits_per_pixel >= 8) {
+			off++;
+		} else {
+			vbe_modes_cnt--;
+		}
+		mode++;
+		mib->depth = mib->red_len + mib->green_len + mib->blue_len;
+		/* Handle 8bpp modes and modes with broken color component
+		 * lengths. */
+		if (mib->depth == 0 ||
+		    (mib->depth == 24 && mib->bits_per_pixel == 32))
+			mib->depth = mib->bits_per_pixel;
+	}
+
+	return 0;
+}
+
+static int __init inline vesafb_vbe_getpmi(struct vesafb_task *tsk)
+{
+	int i;
+
+	vesafb_reset_task(tsk);
+	tsk->regs.eax = 0x4f0a;
+	tsk->regs.ebx = 0x0;
+	tsk->flags = TF_CALL;
+	if (vesafb_queue_task(tsk))
+		return -EINVAL;
+	vesafb_wait_for_task(tsk);
+
+	if ((tsk->regs.eax & 0xffff) != 0x004f || tsk->regs.es < 0xc000) {
+		pmi_setpal = ypan = 0;
+	} else {
+		pmi_base  = (u16*)phys_to_virt(((u32)tsk->regs.es << 4) +
+			     tsk->regs.edi);
+		pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
+		pmi_pal   = (void*)((char*)pmi_base + pmi_base[2]);
+		printk(KERN_INFO "vesafb: protected mode interface info at "
+				 "%04x:%04x\n",
+				 (u16)tsk->regs.es, (u16)tsk->regs.edi);
+		printk(KERN_INFO "vesafb: pmi: set display start = %p, "
+				 "set palette = %p\n", pmi_start, pmi_pal);
+
+		if (pmi_base[3]) {
+			printk(KERN_INFO "vesafb: pmi: ports = ");
+			for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
+				printk("%x ",pmi_base[i]);
+			printk("\n");
+
+			/*
+			 * memory areas not supported (yet?)
+			 *
+			 * Rules are: we have to set up a descriptor for the
+			 * requested memory area and pass it in the ES register
+			 * to the BIOS function.
+			 */
+			if (pmi_base[i] != 0xffff) {
+				printk(KERN_INFO "vesafb: can't handle memory "
+						 "requests, pmi disabled\n");
+				ypan = pmi_setpal = 0;
+			}
+		}
+	}
+	return 0;
+}
+
+static int __init inline vesafb_vbe_getedid(struct vesafb_task *tsk,
+					    struct fb_info *info)
+{
+	int res = 0;
+
+	if (noedid || vbe_ib.vbe_version < 0x0300)
+		return -EINVAL;
+
+	vesafb_reset_task(tsk);
+	tsk->regs.eax = 0x4f15;
+	tsk->regs.ebx = 0;
+	tsk->regs.ecx = 0;
+	if (vesafb_queue_task(tsk))
+		return -EINVAL;
+	vesafb_wait_for_task(tsk);
+
+	if ((tsk->regs.eax & 0xffff) != 0x004f)
+		return -EINVAL;
+
+	if ((tsk->regs.ebx & 0x3) == 3) {
+		printk(KERN_INFO "vesafb: VBIOS/hardware supports both "
+				 "DDC1 and DDC2 transfers\n");
+	} else if ((tsk->regs.ebx & 0x3) == 2) {
+		printk(KERN_INFO "vesafb: VBIOS/hardware supports DDC2 "
+				 "transfers\n");
+	} else if ((tsk->regs.ebx & 0x3) == 1) {
+		printk(KERN_INFO "vesafb: VBIOS/hardware supports DDC1 "
+				 "transfers\n");
+	} else {
+		printk(KERN_INFO "vesafb: VBIOS/hardware doesn't support "
+				 "DDC transfers\n");
+		return -EINVAL;
+	}
+
+	vesafb_reset_task(tsk);
+	tsk->regs.eax = 0x4f15;
+	tsk->regs.ebx = 1;
+	tsk->regs.ecx = tsk->regs.edx = 0;
+	tsk->flags = TF_CALL | TF_RETURN_BUF | TF_BUF_DI;
+	tsk->buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
+	tsk->buf_len = EDID_LENGTH;
+
+	if (vesafb_queue_task(tsk)) {
+		res = -EINVAL;
+		goto out;
+	}
+	vesafb_wait_for_task(tsk);
+
+	if ((tsk->regs.eax & 0xffff) == 0x004f) {
+		fb_edid_to_monspecs(tsk->buf, &info->monspecs);
+		fb_videomode_to_modelist(info->monspecs.modedb,
+				info->monspecs.modedb_len, &info->modelist);
+		if (info->monspecs.vfmax && info->monspecs.hfmax) {
+			/* If the maximum pixel clock wasn't specified in
+			 * the EDID block, set it to 300 MHz. */
+			if (info->monspecs.dclkmax == 0)
+				info->monspecs.dclkmax = 300 * 1000000;
+			info->monspecs.gtf = 1;
+		} else {
+			res = -EINVAL;
+		}
+	}
+
+out:	kfree(tsk->buf);
+	return res;
+}
+
+static void __init inline vesafb_vbe_getmonspecs(struct vesafb_task *tsk,
+		                                 struct fb_info *info)
+{
+	struct fb_var_screeninfo var;
+	int i;
+	memset(&info->monspecs, 0, sizeof(struct fb_monspecs));
+
+	/* If we didn't get all necessary data from the EDID block,
+	 * mark it as incompatible with the GTF. */
+	if (vesafb_vbe_getedid(tsk, info))
+		info->monspecs.gtf = 0;
+
+	/* Kernel command line overrides. */
+	if (maxclk)
+		info->monspecs.dclkmax = maxclk * 1000000;
+	if (maxvf)
+		info->monspecs.vfmax = maxvf;
+	if (maxhf)
+		info->monspecs.hfmax = maxhf * 1000;
+
+	/* In case DDC transfers are not supported the user can provide
+	 * monitor limits manually. Lower limits are set to "safe" values. */
+	if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
+		info->monspecs.dclkmin = 0;
+		info->monspecs.vfmin = 60;
+		info->monspecs.hfmin = 29000;
+		info->monspecs.gtf = 1;
+	}
+
+	if (info->monspecs.gtf) {
+		printk(KERN_INFO
+		       	"vesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
+			"clk = %d MHz\n", info->monspecs.vfmax,
+			(int)(info->monspecs.hfmax / 1000),
+			(int)(info->monspecs.dclkmax / 1000000));
+		/* Add valid VESA video modes to our modelist. */
+		for (i = 0; i < VESA_MODEDB_SIZE; i++) {
+			fb_videomode_to_var(&var, (struct fb_videomode *)
+					    &vesa_modes[i]);
+			if (!fb_validate_mode(&var, info))
+				fb_add_videomode((struct fb_videomode *)
+						 &vesa_modes[i],
+						 &info->modelist);
+		}
+	} else {
+		/* Add all VESA video modes to our modelist. */
+		fb_videomode_to_modelist((struct fb_videomode *)vesa_modes,
+				 	 VESA_MODEDB_SIZE, &info->modelist);
+		printk(KERN_INFO "vesafb: no monitor limits have been set\n");
+	}
+	return;
+}
+
+static int __init inline vesafb_vbe_init(struct fb_info *info)
+{
+	struct vesafb_task *tsk;
+	int res = 0;
+
+	vesafb_create_task(tsk);
+	if (!tsk)
+		return -EINVAL;
+	if ((res = vesafb_vbe_getinfo(tsk)) != 0)
+		goto out;
+	if ((res = vesafb_vbe_getmodes(tsk)) != 0)
+		goto out;
+	if (pmi_setpal || ypan)
+		vesafb_vbe_getpmi(tsk);
+
+	INIT_LIST_HEAD(&info->modelist);
+	vesafb_vbe_getmonspecs(tsk, info);
+
+out:	kfree(tsk);
+	return res;
+}
+
+static int __init decode_mode(u32 *xres, u32 *yres, u32 *bpp, u32 *refresh)
+{
+	int len = strlen(mode_option), i, err = 0;
+	u8 res_specified = 0, bpp_specified = 0, refresh_specified = 0,
+	   yres_specified = 0;
+
+	for (i = len-1; i >= 0; i--) {
+ 		switch (mode_option[i]) {
+		case '@':
+    			len = i;
+    			if (!refresh_specified && !bpp_specified &&
+			    !yres_specified) {
+				*refresh = simple_strtoul(&mode_option[i+1],
+							  NULL, 0);
+				refresh_specified = 1;
+			} else
+				goto out;
+		    	break;
+		case '-':
+			len = i;
+		    	if (!bpp_specified && !yres_specified) {
+			    	*bpp = simple_strtoul(&mode_option[i+1],
+						      NULL, 0);
+				bpp_specified = 1;
+		    	} else
+				goto out;
+		    	break;
+		case 'x':
+			if (!yres_specified) {
+				*yres = simple_strtoul(&mode_option[i+1],
+						       NULL, 0);
+				yres_specified = 1;
+		    	} else
+				goto out;
+		    	break;
+		case '0'...'9':
+			break;
+		default:
+			goto out;
+	    	}
+	}
+
+	if (i < 0 && yres_specified) {
+		*xres = simple_strtoul(mode_option, NULL, 0);
+	   	res_specified = 1;
+	}
+
+out:	if (!res_specified || !yres_specified) {
+		printk(KERN_ERR "vesafb: invalid resolution, "
+				"%s not specified\n",
+				(!res_specified) ? "width" : "height");
+		err = -EINVAL;
+	}
+
+	return err;
+}
+
+static int __init vesafb_init_set_mode(struct fb_info *info)
+{
+	struct fb_videomode *fbmode;
+	struct fb_videomode mode;
+	int i, modeid, refresh = 0;
+	u8 refresh_specified = 0;
+
+	if (!mode_option)
+		mode_option = CONFIG_FB_VESA_DEFAULT_MODE;
+
+	if (vbemode > 0) {
+		for (i = 0; i < vbe_modes_cnt; i++) {
+			if (vbe_modes[i].mode_id == vbemode) {
+				info->var.vmode = FB_VMODE_NONINTERLACED;
+				info->var.sync = FB_SYNC_VERT_HIGH_ACT;
+				vesafb_setup_var(&info->var, info,
+						 &vbe_modes[i]);
+				fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
+					    60, &info->var, info);
+				/* With pixclock set to 0, the default BIOS
+				 * timings will be used in set_par(). */
+				info->var.pixclock = 0;
+				modeid = i;
+				goto out;
+			}
+		}
+		printk(KERN_INFO "specified VBE mode %d not found\n",
+				 vbemode);
+		vbemode = 0;
+	}
+
+	/* Decode the mode specified on the kernel command line. We save
+	 * the depth into bits_per_pixel, which is wrong, but will work
+	 * anyway. */
+	if (decode_mode(&info->var.xres, &info->var.yres,
+			&info->var.bits_per_pixel, &refresh))
+		return -EINVAL;
+	if (refresh)
+		refresh_specified = 1;
+	else
+		refresh = 60;
+
+	/* Look for a matching VBE mode. We can live if an exact match
+	 * cannot be found. */
+	modeid = vesafb_find_vbe_mode(info->var.xres, info->var.yres,
+			              info->var.bits_per_pixel, 0);
+
+	if (modeid == -1) {
+		return -EINVAL;
+	} else {
+		info->var.vmode = FB_VMODE_NONINTERLACED;
+		info->var.sync = FB_SYNC_VERT_HIGH_ACT;
+		vesafb_setup_var(&info->var, info, &vbe_modes[modeid]);
+	}
+	if (vbe_ib.vbe_version < 0x0300) {
+		fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
+			    &info->var, info);
+		goto out;
+	}
+	if (!gtf) {
+		struct fb_videomode tmode;
+
+		if (refresh_specified) {
+			fb_var_to_videomode(&tmode, &info->var);
+			tmode.refresh = refresh;
+			fbmode = fb_find_nearest_mode(&tmode, 
+						      &info->modelist);
+		} else
+			fbmode = fb_find_best_mode(&info->var, 
+						   &info->modelist);
+
+		if (fbmode->xres == info->var.xres &&
+		    fbmode->yres == info->var.yres &&
+		    !(fbmode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))
+		    && (!refresh_specified || 
+		    abs(refresh - fbmode->refresh) <= 5)) {
+			fb_videomode_to_var(&info->var, fbmode);
+			return modeid;
+		}
+	}
+	i = FB_MAXTIMINGS;
+	if (!info->monspecs.gtf)
+		i = FB_IGNOREMON | FB_VSYNCTIMINGS;
+	else if (refresh_specified)
+		i = FB_VSYNCTIMINGS;
+	if (!fb_get_mode(i, refresh, &info->var, info))
+		goto out;
+	if (info->monspecs.gtf &&
+	    !fb_get_mode(FB_MAXTIMINGS, 0, &info->var, info))
+		goto out;
+	/* Use default refresh rate */
+	printk(KERN_WARNING "vesafb: using default BIOS refresh rate\n");
+	info->var.pixclock = 0;
+
+out:
+	fb_var_to_videomode(&mode, &info->var);
+	fb_add_videomode(&mode, &info->modelist);
+	return modeid;
+}
+
+static int __init vesafb_probe(struct platform_device *dev)
+{
+	char entry[16];
+	struct fb_info *info;
+	struct vesafb_mode_ib *mode = NULL;
+	int err = 0, i, h;
+	unsigned int size_vmode;
+	unsigned int size_remap;
+	unsigned int size_total;
+
+	vesafb_info = info = framebuffer_alloc(sizeof(struct vesafb_par) +
+			                       sizeof(u32) * 256, &dev->dev);
+	if (!info)
+	 	return -ENOMEM;
+
+	if (vesafb_wait_for_thread()) {
+		printk(KERN_ERR "vesafb: vesafb thread not running\n");
+		framebuffer_release(info);
+		return -EINVAL;
+	}
+
+	if (vesafb_vbe_init(info)) {
+		printk(KERN_ERR "vesafb: vbe_init failed\n");
+		err = -EINVAL;
+		goto out;
+	}
+
+	vesafb_fix.ypanstep  = ypan     ? 1 : 0;
+	vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
+
+	info->pseudo_palette = ((u8*)info->par + sizeof(struct vesafb_par));
+	info->fbops = &vesafb_ops;
+	info->var = vesafb_defined;
+	info->fix = vesafb_fix;
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+		err = -ENXIO;
+		goto out;
+	}
+
+	i = vesafb_init_set_mode(info);
+	if (i < 0) {
+		err = -EINVAL;
+		goto out_cmap;
+	} else
+		mode = &vbe_modes[i];
+
+	/* Disable blanking if the user requested so. */
+	if (!blank) {
+		info->fbops->fb_blank = NULL;
+	}
+
+	/* Find out how much IO memory is required for the mode with
+	 * the highest resolution. */
+	size_remap = 0;
+	for (i = 0; i < vbe_modes_cnt; i++) {
+		h = vbe_modes[i].bytes_per_scan_line * vbe_modes[i].y_res;
+		if (h > size_remap)
+			size_remap = h;
+	}
+	size_remap *= 2;
+
+	/*   size_vmode -- that is the amount of memory needed for the
+	 *                 used video mode, i.e. the minimum amount of
+	 *                 memory we need. */
+	if (mode != NULL) {
+		size_vmode = info->var.yres * mode->bytes_per_scan_line;
+	} else {
+		size_vmode = info->var.yres * info->var.xres *
+			     ((info->var.bits_per_pixel + 7) >> 3);
+	}
+
+	/*   size_total -- all video memory we have. Used for mtrr
+	 *                 entries, ressource allocation and bounds
+	 *                 checking. */
+	size_total = vbe_ib.total_memory * 65536;
+	if (vram_total)
+		size_total = vram_total * 1024 * 1024;
+	if (size_total < size_vmode)
+		size_total = size_vmode;
+	((struct vesafb_par*)(info->par))->mem_total = size_total;
+
+	/*   size_remap -- the amount of video memory we are going to
+	 *                 use for vesafb.  With modern cards it is no
+	 *                 option to simply use size_total as th
+	 *                 wastes plenty of kernel address space. */
+	if (vram_remap)
+		size_remap = vram_remap * 1024 * 1024;
+	if (size_remap < size_vmode)
+		size_remap = size_vmode;
+	if (size_remap > size_total)
+		size_remap = size_total;
+
+	info->fix.smem_len = size_remap;
+	info->fix.smem_start = mode->phys_base_ptr;
+
+	/* We have to set it here, because when setup_var() was called,
+	 * smem_len wasn't defined yet. */
+	info->var.yres_virtual = info->fix.smem_len /
+				 mode->bytes_per_scan_line;
+
+	if (ypan && info->var.yres_virtual > info->var.yres) {
+		printk(KERN_INFO "vesafb: scrolling: %s "
+		       "using protected mode interface, "
+		       "yres_virtual=%d\n",
+		       (ypan > 1) ? "ywrap" : "ypan",info->var.yres_virtual);
+	} else {
+		printk(KERN_INFO "vesafb: scrolling: redraw\n");
+		info->var.yres_virtual = info->var.yres;
+		ypan = 0;
+	}
+
+	info->flags = FBINFO_FLAG_DEFAULT |
+		(ypan) ? FBINFO_HWACCEL_YPAN : 0;
+
+	if (!ypan)
+		info->fbops->fb_pan_display = NULL;
+
+	if (!request_mem_region(info->fix.smem_start, size_total, "vesafb")) {
+		printk(KERN_WARNING "vesafb: cannot reserve video memory at "
+		       "0x%lx\n", info->fix.smem_start);
+		/* We cannot make this fatal. Sometimes this comes from magic
+		   spaces our resource handlers simply don't know about. */
+	}
+
+	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+
+	if (!info->screen_base) {
+		printk(KERN_ERR
+		       "vesafb: abort, cannot ioremap video memory "
+		       "0x%x @ 0x%lx\n",
+		       info->fix.smem_len, info->fix.smem_start);
+		err = -EIO;
+		goto out_mem;
+ 	}
+
+	/* Request failure does not faze us, as vgacon probably has this
+	   region already (FIXME) */
+	request_region(0x3c0, 32, "vesafb");
+
+#ifdef CONFIG_MTRR
+	if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
+		int temp_size = size_total;
+		unsigned int type = 0;
+
+		switch (mtrr) {
+		case 1:
+			type = MTRR_TYPE_UNCACHABLE;
+			break;
+		case 2:
+			type = MTRR_TYPE_WRBACK;
+			break;
+		case 3:
+			type = MTRR_TYPE_WRCOMB;
+			break;
+		case 4:
+			type = MTRR_TYPE_WRTHROUGH;
+			break;
+		default:
+			type = 0;
+			break;
+		}
+
+		if (type) {
+			int rc;
+
+			/* Find the largest power-of-two */
+			while (temp_size & (temp_size - 1))
+				temp_size &= (temp_size - 1);
+
+			/* Try and find a power of two to add */
+			do {
+				rc = mtrr_add(info->fix.smem_start,
+					      temp_size, type, 1);
+				temp_size >>= 1;
+			} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
+  		}
+  	}
+#endif /* CONFIG_MTRR */
+
+	if (register_framebuffer(info) < 0) {
+		printk(KERN_ERR
+		       "vesafb: failed to register framebuffer device\n");
+		err = -EINVAL;
+		goto out_mem;
+	}
+
+  	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
+	       "using %dk, total %dk\n", info->fix.smem_start,
+	       info->screen_base, size_remap/1024, size_total/1024);
+	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
+	       info->fix.id);
+
+	sprintf(entry, "fb%d", info->node);
+	proc_mkdir(entry, 0);
+
+	sprintf(entry, "fb%d/modes", info->node);
+	create_proc_read_entry(entry, 0, 0, vesafb_read_proc_modes, NULL);
+
+	sprintf(entry, "fb%d/vbe_info", info->node);
+	create_proc_read_entry(entry, 0, 0, vesafb_read_proc_vbe_info, NULL);
+	return 0;
+
+out_mem:
+	release_mem_region(info->fix.smem_start, size_total);
+	if (!list_empty(&info->modelist))
+		fb_destroy_modelist(&info->modelist);
+	fb_destroy_modedb(info->monspecs.modedb);
+out_cmap:
+	fb_dealloc_cmap(&info->cmap);
+out:
+	framebuffer_release(info);
+	vesafb_info = NULL;
+	kfree(vbe_modes);
+	vbe_modes = NULL;
+	return err;
+}
+
+int __init vesafb_init(void)
+{
+	int ret;
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("vesafb", &option))
+		return -ENODEV;
+	vesafb_setup(option);
+#endif
+	ret = platform_driver_register(&vesafb_driver);
+
+	if (!ret) {
+		vesafb_device = platform_device_alloc("vesafb", 0);
+
+		if (vesafb_device)
+			ret = platform_device_add(vesafb_device);
+		else
+			ret = -ENOMEM;
+
+		if (ret) {
+			platform_device_put(vesafb_device);
+			platform_driver_unregister(&vesafb_driver);
+		}
+	}
+	return ret;
+}
+
+module_init(vesafb_init);
+
+#ifdef MODULE
+void __exit vesafb_exit(void)
+{
+	char entry[16];
+
+	if (vesafb_info)
+		unregister_framebuffer(vesafb_info);
+
+	platform_device_unregister(vesafb_device);
+	platform_driver_unregister(&vesafb_driver);
+
+	if (vesafb_info) {
+		struct vesafb_par *par = (struct vesafb_par*)vesafb_info->par;
+
+		sprintf(entry, "fb%d/modes", vesafb_info->node);
+		remove_proc_entry(entry, NULL);
+
+		sprintf(entry, "fb%d/vbe_info", vesafb_info->node);
+		remove_proc_entry(entry, NULL);
+
+		sprintf(entry, "fb%d", vesafb_info->node);
+		remove_proc_entry(entry, NULL);
+
+		iounmap(vesafb_info->screen_base);
+		release_mem_region(vesafb_info->fix.smem_start,
+				   par->mem_total);
+		fb_dealloc_cmap(&vesafb_info->cmap);
+		if (!list_empty(&vesafb_info->modelist))
+			fb_destroy_modelist(&vesafb_info->modelist);
+		fb_destroy_modedb(vesafb_info->monspecs.modedb);
+		framebuffer_release(vesafb_info);
+	}
+
+	if (vbe_modes != NULL)
+		kfree(vbe_modes);
+}
+
+module_exit(vesafb_exit);
+
+static inline int param_get_scroll(char *buffer, struct kernel_param *kp)
+{
+	return 0;
+}
+static inline int param_set_scroll(const char *val, struct kernel_param *kp)
+{
+	ypan = 0;
+
+	if (! strcmp(val, "redraw"))
+		ypan = 0;
+	else if (! strcmp(val, "ypan"))
+		ypan = 1;
+	else if (! strcmp(val, "ywrap"))
+		ypan = 2;
+
+	return 0;
+}
+
+#define param_check_scroll(name, p) __param_check(name, p, void);
+
+module_param_named(scroll, ypan, scroll, 0);
+MODULE_PARM_DESC(scroll,"Scrolling mode, set to 'redraw', 'ypan' or 'ywrap'");
+module_param_named(vgapal, pmi_setpal, invbool, 0);
+MODULE_PARM_DESC(vgapal,"bool: set palette using VGA registers");
+module_param_named(pmipal, pmi_setpal, bool, 0);
+MODULE_PARM_DESC(pmipal,"bool: set palette using PMI calls");
+module_param(mtrr, uint, 0);
+MODULE_PARM_DESC(mtrr,"Memory Type Range Registers setting. Use 0 to disable.");
+module_param(blank, bool, 1);
+MODULE_PARM_DESC(blank,"bool: enable hardware blanking");
+module_param(nocrtc, bool, 0);
+MODULE_PARM_DESC(nocrtc,"bool: ignore CRTC timings when setting modes");
+module_param(noedid, bool, 0);
+MODULE_PARM_DESC(noedid,"bool: ignore EDID-provided monitor limits "
+		        "when setting modes");
+module_param(gtf, bool, 0);
+MODULE_PARM_DESC(gtf,"bool: force use of VESA GTF to calculate mode timings");
+module_param(vram_remap, uint, 0);
+MODULE_PARM_DESC(vram_remap,"Set amount of video memory to be used [MiB]");
+module_param(vram_total, uint, 0);
+MODULE_PARM_DESC(vram_total,"Set total amount of video memoery [MiB]");
+module_param(maxclk, ushort, 0);
+MODULE_PARM_DESC(maxclk,"Maximum pixelclock [MHz], overrides EDID data");
+module_param(maxhf, ushort, 0);
+MODULE_PARM_DESC(maxhf,"Maximum horizontal frequency [kHz], "
+		       "overrides EDID data");
+module_param(maxvf, ushort, 0);
+MODULE_PARM_DESC(maxvf,"Maximum vertical frequency [Hz], "
+		       "overrides EDID data");
+module_param_named(mode, mode_option, charp, 0);
+MODULE_PARM_DESC(mode, "Specify resolution as "
+		       "\"<xres>x<yres>[-<bpp>][@<refresh>]\"");
+module_param(vbemode, ushort, 0);
+MODULE_PARM_DESC(vbemode,"VBE mode number to set, overrides 'mode' setting");
+
+#endif /* MODULE */
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Januszewski");
+MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
+
--- linux-2.6.18.3.orig/include/linux/sched.h	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/include/linux/sched.h	2006-11-26 21:08:47.000000000 -0200
@@ -1281,6 +1281,8 @@ extern void mmput(struct mm_struct *);
 extern struct mm_struct *get_task_mm(struct task_struct *task);
 /* Remove the current tasks stale references to the old mm_struct */
 extern void mm_release(struct task_struct *, struct mm_struct *);
+/* Create a new mm for a kernel thread */
+extern int set_new_mm(void);
 
 extern int  copy_thread(int, unsigned long, unsigned long, unsigned long, struct \
task_struct *, struct pt_regs *);
 extern void flush_thread(void);
--- linux-2.6.18.3.orig/include/video/vesa.h	1969-12-31 21:00:00.000000000 -0300
+++ linux-2.6.18.3/include/video/vesa.h	2006-11-26 21:08:47.000000000 -0200
@@ -0,0 +1,150 @@
+#if 0
+#define DPRINTK(fmt, args...)	printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , \
+						  ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define p_crtc(arg) ((struct vesafb_crtc_ib*)(arg))
+#define p_vbe(arg)  ((struct vesafb_vbe_ib*)(arg))
+#define p_mode(arg) ((struct vesafb_mode_ib*)(arg))
+
+struct vesafb_task {
+	u8 flags;
+	void *buf;
+	int buf_len;
+	struct vm86_regs regs;
+	struct list_head node;
+	struct completion done;
+};
+
+/* Vesafb task flags and masks */
+#define TF_CALL		0x00
+#define TF_EXIT		0x01
+#define TF_GETVBEIB	0x02
+#define TF_BUF_DI	0x04
+#define TF_BUF_BX	0x08
+#define TF_RETURN_BUF	0x10
+
+/* Macros and functions for manipulating vesafb tasks */
+#define vesafb_create_task(task)				\
+do { 								\
+	task = kmalloc(sizeof(struct vesafb_task), GFP_ATOMIC); \
+	if (task) 						\
+		memset(task, 0, sizeof(struct vesafb_task));	\
+	init_completion(&task->done);				\
+} while (0)
+
+#define vesafb_wait_for_task(task) 	wait_for_completion(&task->done);
+#define vesafb_reset_task(task)		init_completion(&task->done);
+int vesafb_queue_task(struct vesafb_task *task);
+
+/* Functions for controlling the vesafb thread */
+int vesafb_wait_for_thread(void);
+
+#define VBE_CAP_CAN_SWITCH_DAC	0x01
+#define VBE_CAP_VGACOMPAT	0x02
+
+/* This struct is 512 bytes long */
+struct vesafb_vbe_ib {
+	char vbe_signature[4];
+	u16  vbe_version;
+	u32  oem_string_ptr;
+	u32  capabilities;
+	u32  mode_list_ptr;
+	u16  total_memory;
+	u16  oem_software_rev;
+	u32  oem_vendor_name_ptr;
+	u32  oem_product_name_ptr;
+	u32  oem_product_rev_ptr;
+	u8   reserved[222];
+	char oem_data[256];
+} __attribute__ ((packed));
+
+struct vesafb_crtc_ib {
+	u16 horiz_total;
+	u16 horiz_start;
+	u16 horiz_end;
+	u16 vert_total;
+	u16 vert_start;
+	u16 vert_end;
+	u8  flags;
+	u32 pixel_clock;
+	u16 refresh_rate;
+	u8  reserved[40];
+} __attribute__ ((packed));
+
+#define VBE_MODE_VGACOMPAT	0x20
+
+struct vesafb_mode_ib {
+	/* for all VBE revisions */
+	u16 mode_attr;
+	u8  winA_attr;
+	u8  winB_attr;
+	u16 win_granularity;
+	u16 win_size;
+	u16 winA_seg;
+	u16 winB_seg;
+	u32 win_func_ptr;
+	u16 bytes_per_scan_line;
+
+	/* for VBE 1.2+ */
+	u16 x_res;
+	u16 y_res;
+	u8  x_char_size;
+	u8  y_char_size;
+	u8  planes;
+	u8  bits_per_pixel;
+	u8  banks;
+	u8  memory_model;
+	u8  bank_size;
+	u8  image_pages;
+	u8  reserved1;
+
+	/* Direct color fields for direct/6 and YUV/7 memory models. */
+	/* Offsets are bit positions of lsb in the mask. */
+	u8  red_len;
+	u8  red_off;
+	u8  green_len;
+	u8  green_off;
+	u8  blue_len;
+	u8  blue_off;
+	u8  rsvd_len;
+	u8  rsvd_off;
+	u8  direct_color_info;	/* direct color mode attributes */
+
+	/* for VBE 2.0+ */
+	u32 phys_base_ptr;
+	u8  reserved2[6];
+
+	/* for VBE 3.0+ */
+	u16 lin_bytes_per_scan_line;
+	u8  bnk_image_pages;
+	u8  lin_image_pages;
+	u8  lin_red_len;
+	u8  lin_red_off;
+	u8  lin_green_len;
+	u8  lin_green_off;
+	u8  lin_blue_len;
+	u8  lin_blue_off;
+	u8  lin_rsvd_len;
+	u8  lin_rsvd_off;
+	u32 max_pixel_clock;
+	u16 mode_id;
+	u8  depth;
+} __attribute__ ((packed));
+
+struct vesafb_pal_entry {
+	u_char blue, green, red, pad;
+} __attribute__ ((packed));
+
+struct vesafb_par {
+	u8 *vbe_state;
+	int vbe_state_size;
+	atomic_t ref_count;
+	
+	u32 mem_total;
+	int mode_idx;
+	struct vesafb_crtc_ib crtc;
+};
+
--- linux-2.6.18.3.orig/kernel/fork.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/kernel/fork.c	2006-11-26 21:08:47.000000000 -0200
@@ -96,6 +96,7 @@ kmem_cache_t *fs_cachep;
 
 /* SLAB cache for vm_area_struct structures */
 kmem_cache_t *vm_area_cachep;
+EXPORT_SYMBOL_GPL(vm_area_cachep);
 
 /* SLAB cache for mm_struct structures (tsk->mm) */
 static kmem_cache_t *mm_cachep;
@@ -389,6 +390,40 @@ void mmput(struct mm_struct *mm)
 EXPORT_SYMBOL_GPL(mmput);
 
 /**
+ * set_new_mm - allocate, init and activate a new mm for a kernel thread
+ */
+int set_new_mm(void)
+{
+	struct mm_struct *mm;
+	struct task_struct *tsk = current;
+	struct mm_struct *active_mm;
+
+	mm = mm_alloc();
+	if (!mm)
+		goto fail_nomem;
+	if (init_new_context(current,mm))
+		goto fail_nocontext;
+
+	task_lock(tsk);
+	tsk->flags |= PF_BORROWED_MM;	
+	active_mm = tsk->active_mm;
+	current->mm = mm;
+	current->active_mm = mm;
+	activate_mm(active_mm, mm);
+	task_unlock(current);
+
+	/* Drop the previous active_mm */
+	mmdrop(active_mm);
+	return 0;
+	
+fail_nocontext:
+	mmdrop(mm);
+fail_nomem:
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(set_new_mm);
+
+/**
  * get_task_mm - acquire a reference to the task's mm
  *
  * Returns %NULL if the task has no mm.  Checks PF_BORROWED_MM (meaning
--- linux-2.6.18.3.orig/mm/memory.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/mm/memory.c	2006-11-26 21:08:47.000000000 -0200
@@ -1175,6 +1175,7 @@ int zeromap_page_range(struct vm_area_st
 	} while (pgd++, addr = next, addr != end);
 	return err;
 }
+EXPORT_SYMBOL_GPL(zeromap_page_range);
 
 pte_t * fastcall get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t \
**ptl)
 {
--- linux-2.6.18.3.orig/mm/mmap.c	2006-11-19 01:28:22.000000000 -0200
+++ linux-2.6.18.3/mm/mmap.c	2006-11-26 21:08:47.000000000 -0200
@@ -2017,6 +2017,7 @@ int insert_vm_struct(struct mm_struct * 
 	vma_link(mm, vma, prev, rb_link, rb_parent);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(insert_vm_struct);
 
 /*
  * Copy the vma structure to a new location in the same mm,
Linux 2.6.17.11-r1 3884  164053 Luca...
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