drivers/video/console/bitblit.c


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40From bdf60ebbeb433a80e6cfcbde9d83d89564e79e20 Mon Sep 17 00:00:00 2001
From: Joe Slater <jslater@windriver.com>
Date: Mon, 26 Aug 2013 23:38:45 +0000
Subject: [PATCH] dpkg: fix configuration issue for mips64

configure cannot determine the proper cpu, os, or
architecture for mips64, and possibly other arch's
because of faulty code added to Arch.pm in the latest
release from upstream.  We remove that code.

Upstream-Status: Pending

Signed-off-by: Joe Slater <jslater@windriver.com>
---
 scripts/Dpkg/Arch.pm | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/scripts/Dpkg/Arch.pm b/scripts/Dpkg/Arch.pm
index 0d352eeb9..4ef5fa307 100644
--- a/scripts/Dpkg/Arch.pm
+++ b/scripts/Dpkg/Arch.pm
@@ -326,9 +326,6 @@ sub _load_tupletable()
 		    (my $dt = $debtuple) =~ s/<cpu>/$_cpu/;
 		    (my $da = $debarch) =~ s/<cpu>/$_cpu/;
 
-		    next if exists $debarch_to_debtuple{$da}
-		         or exists $debtuple_to_debarch{$dt};
-
 		    $debarch_to_debtuple{$da} = $dt;
 		    $debtuple_to_debarch{$dt} = $da;
 		}
/*
 *  linux/drivers/video/console/bitblit.c -- BitBlitting Operation
 *
 *  Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
 *
 *      Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <asm/types.h>
#include "fbcon.h"

/*
 * Accelerated handlers.
 */
static void update_attr(u8 *dst, u8 *src, int attribute,
			       struct vc_data *vc)
{
	int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
	int width = DIV_ROUND_UP(vc->vc_font.width, 8);
	unsigned int cellsize = vc->vc_font.height * width;
	u8 c;

	offset = cellsize - (offset * width);
	for (i = 0; i < cellsize; i++) {
		c = src[i];
		if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
			c = 0xff;
		if (attribute & FBCON_ATTRIBUTE_BOLD)
			c |= c >> 1;
		if (attribute & FBCON_ATTRIBUTE_REVERSE)
			c = ~c;
		dst[i] = c;
	}
}

static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
		      int sx, int dy, int dx, int height, int width)
{
	struct fb_copyarea area;

	area.sx = sx * vc->vc_font.width;
	area.sy = sy * vc->vc_font.height;
	area.dx = dx * vc->vc_font.width;
	area.dy = dy * vc->vc_font.height;
	area.height = height * vc->vc_font.height;
	area.width = width * vc->vc_font.width;

	info->fbops->fb_copyarea(info, &area);
}

static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
		      int sx, int height, int width)
{
	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
	struct fb_fillrect region;

	region.color = attr_bgcol_ec(bgshift, vc, info);
	region.dx = sx * vc->vc_font.width;
	region.dy = sy * vc->vc_font.height;
	region.width = width * vc->vc_font.width;
	region.height = height * vc->vc_font.height;
	region.rop = ROP_COPY;

	info->fbops->fb_fillrect(info, &region);
}

static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
				     const u16 *s, u32 attr, u32 cnt,
				     u32 d_pitch, u32 s_pitch, u32 cellsize,
				     struct fb_image *image, u8 *buf, u8 *dst)
{
	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
	u32 idx = vc->vc_font.width >> 3;
	u8 *src;

	while (cnt--) {
		src = vc->vc_font.data + (scr_readw(s++)&
					  charmask)*cellsize;

		if (attr) {
			update_attr(buf, src, attr, vc);
			src = buf;
		}

		if (likely(idx == 1))
			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
						image->height);
		else
			fb_pad_aligned_buffer(dst, d_pitch, src, idx,
					      image->height);

		dst += s_pitch;
	}

	info->fbops->fb_imageblit(info, image);
}

static inline void bit_putcs_unaligned(struct vc_data *vc,
				       struct fb_info *info, const u16 *s,
				       u32 attr, u32 cnt, u32 d_pitch,
				       u32 s_pitch, u32 cellsize,
				       struct fb_image *image, u8 *buf,
				       u8 *dst)
{
	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
	u32 shift_low = 0, mod = vc->vc_font.width % 8;
	u32 shift_high = 8;
	u32 idx = vc->vc_font.width >> 3;
	u8 *src;

	while (cnt--) {
		src = vc->vc_font.data + (scr_readw(s++)&
					  charmask)*cellsize;

		if (attr) {
			update_attr(buf, src, attr, vc);
			src = buf;
		}

		fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
					image->height, shift_high,
					shift_low, mod);
		shift_low += mod;
		dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
		shift_low &= 7;
		shift_high = 8 - shift_low;
	}

	info->fbops->fb_imageblit(info, image);

}

static void bit_putcs(struct vc_data *vc, struct fb_info *info,
		      const unsigned short *s, int count, int yy, int xx,
		      int fg, int bg)
{
	struct fb_image image;
	u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
	u32 cellsize = width * vc->vc_font.height;
	u32 maxcnt = info->pixmap.size/cellsize;
	u32 scan_align = info->pixmap.scan_align - 1;
	u32 buf_align = info->pixmap.buf_align - 1;
	u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
	u32 attribute = get_attribute(info, scr_readw(s));
	u8 *dst, *buf = NULL;

	image.fg_color = fg;
	image.bg_color = bg;
	image.dx = xx * vc->vc_font.width;
	image.dy = yy * vc->vc_font.height;
	image.height = vc->vc_font.height;
	image.depth = 1;

	if (attribute) {
		buf = kmalloc(cellsize, GFP_ATOMIC);
		if (!buf)
			return;
	}

	while (count) {
		if (count > maxcnt)
			cnt = maxcnt;
		else
			cnt = count;

		image.width = vc->vc_font.width * cnt;
		pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
		pitch &= ~scan_align;
		size = pitch * image.height + buf_align;
		size &= ~buf_align;
		dst = fb_get_buffer_offset(info, &info->pixmap, size);
		image.data = dst;

		if (!mod)
			bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
					  width, cellsize, &image, buf, dst);
		else
			bit_putcs_unaligned(vc, info, s, attribute, cnt,
					    pitch, width, cellsize, &image,
					    buf, dst);

		image.dx += cnt * vc->vc_font.width;
		count -= cnt;
		s += cnt;
	}

	/* buf is always NULL except when in monochrome mode, so in this case
	   it's a gain to check buf against NULL even though kfree() handles
	   NULL pointers just fine */
	if (unlikely(buf))
		kfree(buf);

}

static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
			      int bottom_only)
{
	unsigned int cw = vc->vc_font.width;
	unsigned int ch = vc->vc_font.height;
	unsigned int rw = info->var.xres - (vc->vc_cols*cw);
	unsigned int bh = info->var.yres - (vc->vc_rows*ch);
	unsigned int rs = info->var.xres - rw;
	unsigned int bs = info->var.yres - bh;
	struct fb_fillrect region;

	region.color = 0;
	region.rop = ROP_COPY;

	if (rw && !bottom_only) {
		region.dx = info->var.xoffset + rs;
		region.dy = 0;
		region.width = rw;
		region.height = info->var.yres_virtual;
		info->fbops->fb_fillrect(info, &region);
	}

	if (bh) {
		region.dx = info->var.xoffset;
		region.dy = info->var.yoffset + bs;
		region.width = rs;
		region.height = bh;
		info->fbops->fb_fillrect(info, &region);
	}
}

static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
		       int softback_lines, int fg, int bg)
{
	struct fb_cursor cursor;
	struct fbcon_ops *ops = info->fbcon_par;
	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
	int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
	int y = real_y(ops->p, vc->vc_y);
	int attribute, use_sw = (vc->vc_cursor_type & 0x10);
	int err = 1;
	char *src;

	cursor.set = 0;

	if (softback_lines) {
		if (y + softback_lines >= vc->vc_rows) {
			mode = CM_ERASE;
			ops->cursor_flash = 0;
			return;
		} else
			y += softback_lines;
	}

 	c = scr_readw((u16 *) vc->vc_pos);
	attribute = get_attribute(info, c);
	src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));

	if (ops->cursor_state.image.data != src ||
	    ops->cursor_reset) {
	    ops->cursor_state.image.data = src;
	    cursor.set |= FB_CUR_SETIMAGE;
	}

	if (attribute) {
		u8 *dst;

		dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
		if (!dst)
			return;
		kfree(ops->cursor_data);
		ops->cursor_data = dst;
		update_attr(dst, src, attribute, vc);
		src = dst;
	}

	if (ops->cursor_state.image.fg_color != fg ||
	    ops->cursor_state.image.bg_color != bg ||
	    ops->cursor_reset) {
		ops->cursor_state.image.fg_color = fg;
		ops->cursor_state.image.bg_color = bg;
		cursor.set |= FB_CUR_SETCMAP;
	}

	if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
	    (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
	    ops->cursor_reset) {
		ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
		ops->cursor_state.image.dy = vc->vc_font.height * y;
		cursor.set |= FB_CUR_SETPOS;
	}

	if (ops->cursor_state.image.height != vc->vc_font.height ||
	    ops->cursor_state.image.width != vc->vc_font.width ||
	    ops->cursor_reset) {
		ops->cursor_state.image.height = vc->vc_font.height;
		ops->cursor_state.image.width = vc->vc_font.width;
		cursor.set |= FB_CUR_SETSIZE;
	}

	if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
	    ops->cursor_reset) {
		ops->cursor_state.hot.x = cursor.hot.y = 0;
		cursor.set |= FB_CUR_SETHOT;
	}

	if (cursor.set & FB_CUR_SETSIZE ||
	    vc->vc_cursor_type != ops->p->cursor_shape ||
	    ops->cursor_state.mask == NULL ||
	    ops->cursor_reset) {
		char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
		int cur_height, size, i = 0;
		u8 msk = 0xff;

		if (!mask)
			return;

		kfree(ops->cursor_state.mask);
		ops->cursor_state.mask = mask;

		ops->p->cursor_shape = vc->vc_cursor_type;
		cursor.set |= FB_CUR_SETSHAPE;

		switch (ops->p->cursor_shape & CUR_HWMASK) {
		case CUR_NONE:
			cur_height = 0;
			break;
		case CUR_UNDERLINE:
			cur_height = (vc->vc_font.height < 10) ? 1 : 2;
			break;
		case CUR_LOWER_THIRD:
			cur_height = vc->vc_font.height/3;
			break;
		case CUR_LOWER_HALF:
			cur_height = vc->vc_font.height >> 1;
			break;
		case CUR_TWO_THIRDS:
			cur_height = (vc->vc_font.height << 1)/3;
			break;
		case CUR_BLOCK:
		default:
			cur_height = vc->vc_font.height;
			break;
		}
		size = (vc->vc_font.height - cur_height) * w;
		while (size--)
			mask[i++] = ~msk;
		size = cur_height * w;
		while (size--)
			mask[i++] = msk;
	}

	switch (mode) {
	case CM_ERASE:
		ops->cursor_state.enable = 0;
		break;
	case CM_DRAW:
	case CM_MOVE:
	default:
		ops->cursor_state.enable = (use_sw) ? 0 : 1;
		break;
	}

	cursor.image.data = src;
	cursor.image.fg_color = ops->cursor_state.image.fg_color;
	cursor.image.bg_color = ops->cursor_state.image.bg_color;
	cursor.image.dx = ops->cursor_state.image.dx;
	cursor.image.dy = ops->cursor_state.image.dy;
	cursor.image.height = ops->cursor_state.image.height;
	cursor.image.width = ops->cursor_state.image.width;
	cursor.hot.x = ops->cursor_state.hot.x;
	cursor.hot.y = ops->cursor_state.hot.y;
	cursor.mask = ops->cursor_state.mask;
	cursor.enable = ops->cursor_state.enable;
	cursor.image.depth = 1;
	cursor.rop = ROP_XOR;

	if (info->fbops->fb_cursor)
		err = info->fbops->fb_cursor(info, &cursor);

	if (err)
		soft_cursor(info, &cursor);

	ops->cursor_reset = 0;
}

static int bit_update_start(struct fb_info *info)
{
	struct fbcon_ops *ops = info->fbcon_par;
	int err;

	err = fb_pan_display(info, &ops->var);
	ops->var.xoffset = info->var.xoffset;
	ops->var.yoffset = info->var.yoffset;
	ops->var.vmode = info->var.vmode;
	return err;
}

void fbcon_set_bitops(struct fbcon_ops *ops)
{
	ops->bmove = bit_bmove;
	ops->clear = bit_clear;
	ops->putcs = bit_putcs;
	ops->clear_margins = bit_clear_margins;
	ops->cursor = bit_cursor;
	ops->update_start = bit_update_start;
	ops->rotate_font = NULL;

	if (ops->rotate)
		fbcon_set_rotate(ops);
}

EXPORT_SYMBOL(fbcon_set_bitops);

MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
MODULE_DESCRIPTION("Bit Blitting Operation");
MODULE_LICENSE("GPL");