fbdev: core: Use generic copyarea for as cfb_copyarea
Signed-off-by: Zsolt Kajtar <s...@c64.rulez.org>
---
drivers/video/fbdev/core/cfbcopyarea.c | 426 +------------------------
1 file changed, 10 insertions(+), 416 deletions(-)
diff --git a/drivers/video/fbdev/core/cfbcopyarea.c
b/drivers/video/fbdev/core/cfbcopyarea.c
index a271f57d9..ba0ebd115 100644
--- a/drivers/video/fbdev/core/cfbcopyarea.c
+++ b/drivers/video/fbdev/core/cfbcopyarea.c
@@ -7,434 +7,28 @@
* License. See the file COPYING in the main directory of this archive for
* more details.
*
- * NOTES:
- *
- * This is for cfb packed pixels. Iplan and such are incorporated in the
- * drivers that need them.
- *
- * FIXME
- *
- * Also need to add code to deal with cards endians that are different than
- * the native cpu endians. I also need to deal with MSB position in the word.
- *
- * The two functions or copying forward and backward could be split up like
- * the ones for filling, i.e. in aligned and unaligned versions. This would
- * help moving some redundant computations and branches out of the loop, too.
*/
#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
#include <linux/fb.h>
#include <asm/types.h>
-#include <asm/io.h>
-#include "fb_draw.h"
#if BITS_PER_LONG == 32
-# define FB_WRITEL fb_writel
-# define FB_READL fb_readl
+# define FB_WRITEL fb_writel
+# define FB_READL fb_readl
#else
-# define FB_WRITEL fb_writeq
-# define FB_READL fb_readq
-#endif
-
- /*
- * Generic bitwise copy algorithm
- */
-
-static void
-bitcpy(struct fb_info *p, unsigned long __iomem *dst, unsigned dst_idx,
- const unsigned long __iomem *src, unsigned src_idx, int bits,
- unsigned n, u32 bswapmask)
-{
- unsigned long first, last;
- int const shift = dst_idx-src_idx;
-
-#if 0
- /*
- * If you suspect bug in this function, compare it with this simple
- * memmove implementation.
- */
- memmove((char *)dst + ((dst_idx & (bits - 1))) / 8,
- (char *)src + ((src_idx & (bits - 1))) / 8, n / 8);
- return;
-#endif
-
- first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
- last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
-
- if (!shift) {
- // Same alignment for source and dest
-
- if (dst_idx+n <= bits) {
- // Single word
- if (last)
- first &= last;
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst), first),
dst);
- } else {
- // Multiple destination words
-
- // Leading bits
- if (first != ~0UL) {
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst),
first), dst);
- dst++;
- src++;
- n -= bits - dst_idx;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 8) {
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- FB_WRITEL(FB_READL(src++), dst++);
- n -= 8;
- }
- while (n--)
- FB_WRITEL(FB_READL(src++), dst++);
-
- // Trailing bits
- if (last)
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst),
last), dst);
- }
- } else {
- /* Different alignment for source and dest */
- unsigned long d0, d1;
- int m;
-
- int const left = shift & (bits - 1);
- int const right = -shift & (bits - 1);
-
- if (dst_idx+n <= bits) {
- // Single destination word
- if (last)
- first &= last;
- d0 = FB_READL(src);
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- if (shift > 0) {
- // Single source word
- d0 <<= left;
- } else if (src_idx+n <= bits) {
- // Single source word
- d0 >>= right;
- } else {
- // 2 source words
- d1 = FB_READL(src + 1);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
- d0 = d0 >> right | d1 << left;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(comp(d0, FB_READL(dst), first), dst);
- } else {
- // Multiple destination words
- /** We must always remember the last value read,
because in case
- SRC and DST overlap bitwise (e.g. when moving just one
pixel in
- 1bpp), we always collect one full long for DST and that
might
- overlap with the current long from SRC. We store this
value in
- 'd0'. */
- d0 = FB_READL(src++);
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- // Leading bits
- if (shift > 0) {
- // Single source word
- d1 = d0;
- d0 <<= left;
- n -= bits - dst_idx;
- } else {
- // 2 source words
- d1 = FB_READL(src++);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
-
- d0 = d0 >> right | d1 << left;
- n -= bits - dst_idx;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(comp(d0, FB_READL(dst), first), dst);
- d0 = d1;
- dst++;
-
- // Main chunk
- m = n % bits;
- n /= bits;
- while ((n >= 4) && !bswapmask) {
- d1 = FB_READL(src++);
- FB_WRITEL(d0 >> right | d1 << left, dst++);
- d0 = d1;
- d1 = FB_READL(src++);
- FB_WRITEL(d0 >> right | d1 << left, dst++);
- d0 = d1;
- d1 = FB_READL(src++);
- FB_WRITEL(d0 >> right | d1 << left, dst++);
- d0 = d1;
- d1 = FB_READL(src++);
- FB_WRITEL(d0 >> right | d1 << left, dst++);
- d0 = d1;
- n -= 4;
- }
- while (n--) {
- d1 = FB_READL(src++);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
- d0 = d0 >> right | d1 << left;
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(d0, dst++);
- d0 = d1;
- }
-
- // Trailing bits
- if (m) {
- if (m <= bits - right) {
- // Single source word
- d0 >>= right;
- } else {
- // 2 source words
- d1 = FB_READL(src);
- d1 = fb_rev_pixels_in_long(d1,
- bswapmask);
- d0 = d0 >> right | d1 << left;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(comp(d0, FB_READL(dst), last), dst);
- }
- }
- }
-}
-
- /*
- * Generic bitwise copy algorithm, operating backward
- */
-
-static void
-bitcpy_rev(struct fb_info *p, unsigned long __iomem *dst, unsigned dst_idx,
- const unsigned long __iomem *src, unsigned src_idx, int bits,
- unsigned n, u32 bswapmask)
-{
- unsigned long first, last;
- int shift;
-
-#if 0
- /*
- * If you suspect bug in this function, compare it with this simple
- * memmove implementation.
- */
- memmove((char *)dst + ((dst_idx & (bits - 1))) / 8,
- (char *)src + ((src_idx & (bits - 1))) / 8, n / 8);
- return;
+# define FB_WRITEL fb_writeq
+# define FB_READL fb_readq
#endif
-
- dst += (dst_idx + n - 1) / bits;
- src += (src_idx + n - 1) / bits;
- dst_idx = (dst_idx + n - 1) % bits;
- src_idx = (src_idx + n - 1) % bits;
-
- shift = dst_idx-src_idx;
-
- first = ~fb_shifted_pixels_mask_long(p, (dst_idx + 1) % bits,
bswapmask);
- last = fb_shifted_pixels_mask_long(p, (bits + dst_idx + 1 - n) % bits,
bswapmask);
-
- if (!shift) {
- // Same alignment for source and dest
-
- if ((unsigned long)dst_idx+1 >= n) {
- // Single word
- if (first)
- last &= first;
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst), last),
dst);
- } else {
- // Multiple destination words
-
- // Leading bits
- if (first) {
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst),
first), dst);
- dst--;
- src--;
- n -= dst_idx+1;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 8) {
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- FB_WRITEL(FB_READL(src--), dst--);
- n -= 8;
- }
- while (n--)
- FB_WRITEL(FB_READL(src--), dst--);
-
- // Trailing bits
- if (last != -1UL)
- FB_WRITEL( comp( FB_READL(src), FB_READL(dst),
last), dst);
- }
- } else {
- // Different alignment for source and dest
- unsigned long d0, d1;
- int m;
-
- int const left = shift & (bits-1);
- int const right = -shift & (bits-1);
-
- if ((unsigned long)dst_idx+1 >= n) {
- // Single destination word
- if (first)
- last &= first;
- d0 = FB_READL(src);
- if (shift < 0) {
- // Single source word
- d0 >>= right;
- } else if (1+(unsigned long)src_idx >= n) {
- // Single source word
- d0 <<= left;
- } else {
- // 2 source words
- d1 = FB_READL(src - 1);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
- d0 = d0 << left | d1 >> right;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(comp(d0, FB_READL(dst), last), dst);
- } else {
- // Multiple destination words
- /** We must always remember the last value read,
because in case
- SRC and DST overlap bitwise (e.g. when moving just one
pixel in
- 1bpp), we always collect one full long for DST and that
might
- overlap with the current long from SRC. We store this
value in
- 'd0'. */
-
- d0 = FB_READL(src--);
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- // Leading bits
- if (shift < 0) {
- // Single source word
- d1 = d0;
- d0 >>= right;
- } else {
- // 2 source words
- d1 = FB_READL(src--);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
- d0 = d0 << left | d1 >> right;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- if (!first)
- FB_WRITEL(d0, dst);
- else
- FB_WRITEL(comp(d0, FB_READL(dst), first), dst);
- d0 = d1;
- dst--;
- n -= dst_idx+1;
-
- // Main chunk
- m = n % bits;
- n /= bits;
- while ((n >= 4) && !bswapmask) {
- d1 = FB_READL(src--);
- FB_WRITEL(d0 << left | d1 >> right, dst--);
- d0 = d1;
- d1 = FB_READL(src--);
- FB_WRITEL(d0 << left | d1 >> right, dst--);
- d0 = d1;
- d1 = FB_READL(src--);
- FB_WRITEL(d0 << left | d1 >> right, dst--);
- d0 = d1;
- d1 = FB_READL(src--);
- FB_WRITEL(d0 << left | d1 >> right, dst--);
- d0 = d1;
- n -= 4;
- }
- while (n--) {
- d1 = FB_READL(src--);
- d1 = fb_rev_pixels_in_long(d1, bswapmask);
- d0 = d0 << left | d1 >> right;
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(d0, dst--);
- d0 = d1;
- }
-
- // Trailing bits
- if (m) {
- if (m <= bits - left) {
- // Single source word
- d0 <<= left;
- } else {
- // 2 source words
- d1 = FB_READL(src);
- d1 = fb_rev_pixels_in_long(d1,
- bswapmask);
- d0 = d0 << left | d1 >> right;
- }
- d0 = fb_rev_pixels_in_long(d0, bswapmask);
- FB_WRITEL(comp(d0, FB_READL(dst), last), dst);
- }
- }
- }
-}
-
-void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
-{
- u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy;
- u32 height = area->height, width = area->width;
- unsigned int const bits_per_line = p->fix.line_length * 8u;
- unsigned long __iomem *base = NULL;
- int bits = BITS_PER_LONG, bytes = bits >> 3;
- unsigned dst_idx = 0, src_idx = 0, rev_copy = 0;
- u32 bswapmask = fb_compute_bswapmask(p);
-
- if (p->state != FBINFO_STATE_RUNNING)
- return;
-
- if (p->flags & FBINFO_VIRTFB)
- fb_warn_once(p, "Framebuffer is not in I/O address space.");
-
- /* if the beginning of the target area might overlap with the end of
- the source area, be have to copy the area reverse. */
- if ((dy == sy && dx > sx) || (dy > sy)) {
- dy += height;
- sy += height;
- rev_copy = 1;
- }
-
- // split the base of the framebuffer into a long-aligned address and the
- // index of the first bit
- base = (unsigned long __iomem *)((unsigned long)p->screen_base &
~(bytes-1));
- dst_idx = src_idx = 8*((unsigned long)p->screen_base & (bytes-1));
- // add offset of source and target area
- dst_idx += dy*bits_per_line + dx*p->var.bits_per_pixel;
- src_idx += sy*bits_per_line + sx*p->var.bits_per_pixel;
-
- if (p->fbops->fb_sync)
- p->fbops->fb_sync(p);
-
- if (rev_copy) {
- while (height--) {
- dst_idx -= bits_per_line;
- src_idx -= bits_per_line;
- bitcpy_rev(p, base + (dst_idx / bits), dst_idx % bits,
- base + (src_idx / bits), src_idx % bits, bits,
- width*p->var.bits_per_pixel, bswapmask);
- }
- } else {
- while (height--) {
- bitcpy(p, base + (dst_idx / bits), dst_idx % bits,
- base + (src_idx / bits), src_idx % bits, bits,
- width*p->var.bits_per_pixel, bswapmask);
- dst_idx += bits_per_line;
- src_idx += bits_per_line;
- }
- }
-}
+#define FB_MEM /* nothing */
+#define FB_COPYAREA cfb_copyarea
+#define FB_SPACE 0
+#define FB_SPACE_NAME "I/O"
+#define FB_SCREEN_BASE(a) ((a)->screen_base)
+#include "fb_copyarea.h"
EXPORT_SYMBOL(cfb_copyarea);
MODULE_AUTHOR("James Simmons <jsimm...@users.sf.net>");
MODULE_DESCRIPTION("Generic software accelerated copyarea");
MODULE_LICENSE("GPL");
-
--
2.30.2
