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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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, const 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 fg, int bg){ struct fb_fillrect region;
region.color = bg; 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, ®ion);}
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; unsigned int charcnt = vc->vc_font.charcount; u32 idx = vc->vc_font.width >> 3; const u8 *src;
while (cnt--) { u16 ch = scr_readw(s++) & charmask;
if (ch >= charcnt) ch = 0; src = vc->vc_font.data + (unsigned int)ch * 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; unsigned int charcnt = vc->vc_font.charcount; u32 shift_low = 0, mod = vc->vc_font.width % 8; u32 shift_high = 8; u32 idx = vc->vc_font.width >> 3; const u8 *src;
while (cnt--) { u16 ch = scr_readw(s++) & charmask;
if (ch >= charcnt) ch = 0; src = vc->vc_font.data + (unsigned int)ch * 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 (image.dy >= info->var.yres) return;
image.height = min(image.height, info->var.yres - image.dy);
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;
if (image.dx >= info->var.xres) break;
if (image.dx + image.width > info->var.xres) { image.width = info->var.xres - image.dx; cnt = image.width / vc->vc_font.width; if (cnt == 0) break; image.width = cnt * vc->vc_font.width; }
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 color, 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 = color; region.rop = ROP_COPY;
if ((int) rw > 0 && !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, ®ion); }
if ((int) bh > 0) { region.dx = info->var.xoffset; region.dy = info->var.yoffset + bs; region.width = rs; region.height = bh; info->fbops->fb_fillrect(info, ®ion); }}
static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable, int fg, int bg){ struct fb_cursor cursor; struct fbcon_par *par = 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(par->p, vc->state.y); int attribute, use_sw = vc->vc_cursor_type & CUR_SW; int err = 1; const u8 *src;
cursor.set = 0;
if (!vc->vc_font.data) return;
c = scr_readw((u16 *) vc->vc_pos); attribute = get_attribute(info, c); c &= charmask;
/* Clamp to font size, same as bit_putcs_aligned() */ if (c >= vc->vc_font.charcount) c = 0; src = vc->vc_font.data + (c * (w * vc->vc_font.height));
if (par->cursor_state.image.data != (const char *)src || par->cursor_reset) { par->cursor_state.image.data = src; cursor.set |= FB_CUR_SETIMAGE; }
if (attribute) { u8 *dst;
dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); if (!dst) return; kfree(par->cursor_data); par->cursor_data = dst; update_attr(dst, src, attribute, vc); src = dst; }
if (par->cursor_state.image.fg_color != fg || par->cursor_state.image.bg_color != bg || par->cursor_reset) { par->cursor_state.image.fg_color = fg; par->cursor_state.image.bg_color = bg; cursor.set |= FB_CUR_SETCMAP; }
if ((par->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) || (par->cursor_state.image.dy != (vc->vc_font.height * y)) || par->cursor_reset) { par->cursor_state.image.dx = vc->vc_font.width * vc->state.x; par->cursor_state.image.dy = vc->vc_font.height * y; cursor.set |= FB_CUR_SETPOS; }
if (par->cursor_state.image.height != vc->vc_font.height || par->cursor_state.image.width != vc->vc_font.width || par->cursor_reset) { par->cursor_state.image.height = vc->vc_font.height; par->cursor_state.image.width = vc->vc_font.width; cursor.set |= FB_CUR_SETSIZE; }
if (par->cursor_state.hot.x || par->cursor_state.hot.y || par->cursor_reset) { par->cursor_state.hot.x = cursor.hot.y = 0; cursor.set |= FB_CUR_SETHOT; }
if (cursor.set & FB_CUR_SETSIZE || vc->vc_cursor_type != par->p->cursor_shape || par->cursor_state.mask == NULL || par->cursor_reset) { unsigned char *mask = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC);
if (!mask) return; fbcon_fill_cursor_mask(par, vc, mask);
kfree(par->cursor_state.mask); par->cursor_state.mask = (const char *)mask;
par->p->cursor_shape = vc->vc_cursor_type; cursor.set |= FB_CUR_SETSHAPE; }
par->cursor_state.enable = enable && !use_sw;
cursor.image.data = src; cursor.image.fg_color = par->cursor_state.image.fg_color; cursor.image.bg_color = par->cursor_state.image.bg_color; cursor.image.dx = par->cursor_state.image.dx; cursor.image.dy = par->cursor_state.image.dy; cursor.image.height = par->cursor_state.image.height; cursor.image.width = par->cursor_state.image.width; cursor.hot.x = par->cursor_state.hot.x; cursor.hot.y = par->cursor_state.hot.y; cursor.mask = par->cursor_state.mask; cursor.enable = par->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);
par->cursor_reset = 0;}
static int bit_update_start(struct fb_info *info){ struct fbcon_par *par = info->fbcon_par; int err;
err = fb_pan_display(info, &par->var); par->var.xoffset = info->var.xoffset; par->var.yoffset = info->var.yoffset; par->var.vmode = info->var.vmode; return err;}
static const struct fbcon_bitops bit_fbcon_bitops = { .bmove = bit_bmove, .clear = bit_clear, .putcs = bit_putcs, .clear_margins = bit_clear_margins, .cursor = bit_cursor, .update_start = bit_update_start,};
void fbcon_set_bitops_ur(struct fbcon_par *par){ par->bitops = &bit_fbcon_bitops;}