/* 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 */ while (temp_size > PAGE_SIZE && mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) { temp_size >>= 1; 
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(vesafb_fix.smem_start, temp_size, type, 1); temp_size >>= 1; } while (temp_size >= PAGE_SIZE && rc == -EINVAL); 
static int __init vesafb_probe(struct device *device){	struct platform_device *dev = to_platform_device(device);	struct fb_info *info;	int i, err;	unsigned int size_vmode;	unsigned int size_remap;	unsigned int size_total;	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)		return -ENODEV;	vesafb_fix.smem_start = screen_info.lfb_base;	vesafb_defined.bits_per_pixel = screen_info.lfb_depth;	if (15 == vesafb_defined.bits_per_pixel)		vesafb_defined.bits_per_pixel = 16;	vesafb_defined.xres = screen_info.lfb_width;	vesafb_defined.yres = screen_info.lfb_height;	vesafb_fix.line_length = screen_info.lfb_linelength;	vesafb_fix.visual   = (vesafb_defined.bits_per_pixel == 8) ?		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;	/*   size_vmode -- that is the amount of memory needed for the	 *                 used video mode, i.e. the minimum amount of	 *                 memory we need. */	size_vmode = vesafb_defined.yres * vesafb_fix.line_length;	/*   size_total -- all video memory we have. Used for mtrr	 *                 entries, ressource allocation and bounds	 *                 checking. */	size_total = screen_info.lfb_size * 65536;	if (vram_total)		size_total = vram_total * 1024 * 1024;	if (size_total < size_vmode)		size_total = size_vmode;	/*   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 that	 *                 wastes plenty of kernel address space. */	size_remap  = size_vmode * 2;	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;	vesafb_fix.smem_len = size_remap;#ifndef __i386__	screen_info.vesapm_seg = 0;#endif	if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {		printk(KERN_WARNING		       "vesafb: cannot reserve video memory at 0x%lx\n",			vesafb_fix.smem_start);		/* We cannot make this fatal. Sometimes this comes from magic		   spaces our resource handlers simply don't know about */	}	info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);	if (!info) {		release_mem_region(vesafb_fix.smem_start, size_total);		return -ENOMEM;	}	info->pseudo_palette = info->par;	info->par = NULL;	info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);	if (!info->screen_base) {		printk(KERN_ERR		       "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",			vesafb_fix.smem_len, vesafb_fix.smem_start);		err = -EIO;		goto err;	}	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "	       "using %dk, total %dk\n",	       vesafb_fix.smem_start, info->screen_base,	       size_remap/1024, size_total/1024);	printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",	       vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);	if (screen_info.vesapm_seg) {		printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",		       screen_info.vesapm_seg,screen_info.vesapm_off);	}	if (screen_info.vesapm_seg < 0xc000)		ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */	if (ypan || pmi_setpal) {		pmi_base  = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);		pmi_start = (void*)((char*)pmi_base + pmi_base[1]);		pmi_pal   = (void*)((char*)pmi_base + pmi_base[2]);		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");			if (pmi_base[i] != 0xffff) {				/*				 * 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.				 */				printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");				ypan = pmi_setpal = 0;			}		}	}	vesafb_defined.xres_virtual = vesafb_defined.xres;	vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;	if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {		printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",		       (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);	} else {		printk(KERN_INFO "vesafb: scrolling: redraw\n");		vesafb_defined.yres_virtual = vesafb_defined.yres;		ypan = 0;	}	/* some dummy values for timing to make fbset happy */	vesafb_defined.pixclock     = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;	vesafb_defined.left_margin  = (vesafb_defined.xres / 8) & 0xf8;	vesafb_defined.hsync_len    = (vesafb_defined.xres / 8) & 0xf8;		vesafb_defined.red.offset    = screen_info.red_pos;	vesafb_defined.red.length    = screen_info.red_size;	vesafb_defined.green.offset  = screen_info.green_pos;	vesafb_defined.green.length  = screen_info.green_size;	vesafb_defined.blue.offset   = screen_info.blue_pos;	vesafb_defined.blue.length   = screen_info.blue_size;	vesafb_defined.transp.offset = screen_info.rsvd_pos;	vesafb_defined.transp.length = screen_info.rsvd_size;	if (vesafb_defined.bits_per_pixel <= 8) {		depth = vesafb_defined.green.length;		vesafb_defined.red.length =		vesafb_defined.green.length =		vesafb_defined.blue.length =		vesafb_defined.bits_per_pixel;	}	printk(KERN_INFO "vesafb: %s: "	       "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",	       (vesafb_defined.bits_per_pixel > 8) ?	       "Truecolor" : "Pseudocolor",	       screen_info.rsvd_size,	       screen_info.red_size,	       screen_info.green_size,	       screen_info.blue_size,	       screen_info.rsvd_pos,	       screen_info.red_pos,	       screen_info.green_pos,	       screen_info.blue_pos);	vesafb_fix.ypanstep  = ypan     ? 1 : 0;	vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;	/* request failure does not faze us, as vgacon probably has this	 * region already (FIXME) */	request_region(0x3c0, 32, "vesafb");	if (mtrr) {		unsigned int temp_size = size_total;		/* 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 */		while (temp_size > PAGE_SIZE &&			mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) {			temp_size >>= 1;		}	}		info->fbops = &vesafb_ops;	info->var = vesafb_defined;	info->fix = vesafb_fix;	info->flags = FBINFO_FLAG_DEFAULT |		(ypan) ? FBINFO_HWACCEL_YPAN : 0;	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {		err = -ENOMEM;		goto err;	}	if (register_framebuffer(info)<0) {		err = -EINVAL;		fb_dealloc_cmap(&info->cmap);		goto err;	}	printk(KERN_INFO "fb%d: %s frame buffer device\n",	       info->node, info->fix.id);	return 0;err:	framebuffer_release(info);	release_mem_region(vesafb_fix.smem_start, size_total);	return err;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/80625942094b114d85811e5ff1fbc9e06dabe0ff/vesafb.c/buggy/drivers/video/vesafb.c