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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [armnommu/] [drivers/] [char/] [consoledriver.c] - Blame information for rev 1765

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/*
 * linux/arch/arm/drivers/char/consoledriver.c
 *
 * Low-level console routines
 */
#include <linux/string.h>
 
#include <asm/hardware.h>
#include <asm/io.h>
 
#include "vt_kern.h"
 
#define palette_setpixel(p) outl(0x10000000|((p) & 255), IO_VIDC_BASE)
#define palette_write(v)  outl(0x00000000|((v) & 0x00ffffff), IO_VIDC_BASE)
/*
 * Don't allow underline through to erasing/scrolling routines
 */
#define FLG_MASK (~(FLG_UNDERLINE << 24))
 
extern void scroll_set_origin (unsigned long offset);
extern void ll_write_char(unsigned long ps, unsigned long chinfo);
 
static void vcd_buffer_gotoxy(struct con_struct *vcd)
{
        vcd->screen.pos = vcd->screen.origin;
        vcd->buffer.pos = vcd->curstate.y * vtdata.buffer.sizerow +
                          vcd->curstate.x;
}
 
static void vcd_buffer_scrollup(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)
{
        unsigned int old_top, new_top, old_end, new_end;
 
        if (b > vtdata.numrows || t >= b || l == 0)
                return;
 
        l *= vtdata.buffer.sizerow;
        old_top = t * vtdata.buffer.sizerow;
        new_top = old_top + l;
        new_end = b * vtdata.buffer.sizerow;
        old_end = new_end - l;
 
        if (new_top < new_end) /* we have something to move */
                memmove (vcd->buffer.buffer + old_top, vcd->buffer.buffer + new_top,
                         (new_end - new_top) << 2);
 
        if (old_end < new_end) {
                if (old_end < old_top)
                        old_end = old_top;
                memsetl (vcd->buffer.buffer + old_end, (vcd->combined_state & FLG_MASK) | 32,
                        (new_end - old_end) << 2);
        }
}
 
static void vcd_buffer_scrolldown(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)
{
        unsigned int old_top, new_top, old_end, new_end;
 
        if (b > vtdata.numrows || t >= b || l == 0)
                return;
 
        l *= vtdata.buffer.sizerow;
        new_top = t * vtdata.buffer.sizerow;
        old_top = new_top + l;
        old_end = b * vtdata.buffer.sizerow;
        new_end = old_end - l;
 
        if (new_top < new_end) /* we have something to move */
                memmove (vcd->buffer.buffer + old_top, vcd->buffer.buffer + new_top,
                         (new_end - new_top) << 2);
 
        if (new_top < old_top) { /* we have something to clear */
                if (old_top > old_end)
                        old_top = old_end;
                memsetl (vcd->buffer.buffer + new_top, (vcd->combined_state & FLG_MASK) | 32,
                                (old_top - new_top) << 2);
        }
}
 
static unsigned long *vcd_buffer_buffer_pos(struct con_struct *vcd, unsigned int offset)
{
        return vcd->buffer.buffer + offset;
}
 
static void vcd_buffer_delete_char(struct con_struct *vcd, unsigned int n)
{
        unsigned long *buffer;
        unsigned int len;
 
        buffer = vcd->buffer.buffer + vcd->buffer.pos;
 
        if (n >= vtdata.numcolumns - vcd->curstate.x) {
                n = vtdata.numcolumns - vcd->curstate.x;
                len = 0;
        } else {
                len = vtdata.numcolumns - vcd->curstate.x - n;
                memmove (buffer, buffer + n, len << 2);
        }
        memsetl (buffer + len, (vcd->combined_state & FLG_MASK) | 32, n << 2);
}
 
static void vcd_buffer_insert_char(struct con_struct *vcd, unsigned int n)
{
        unsigned long *buffer;
 
        buffer = vcd->buffer.buffer + vcd->buffer.pos;
 
        if (n >= vtdata.numcolumns - vcd->curstate.x)
                n = vtdata.numcolumns - vcd->curstate.x;
        else
                memmove (buffer + n, buffer, (vtdata.numcolumns - vcd->curstate.x - n) << 2);
        memsetl (buffer, (vcd->combined_state & FLG_MASK) | 32, n << 2);
}
 
static void vcd_buffer_write_char(struct con_struct *vcd, unsigned long character)
{
        if (vcd->need_wrap) {
                vcd->buffer.pos -= vcd->curstate.x;
                vcd->need_wrap = vcd->curstate.x = 0;
                if (vcd->curstate.y + 1 == vcd->bottom)
                        vcd_buffer_scrollup(vcd, vcd->top, vcd->bottom, 1);
                else if (vcd->curstate.y + 1 < vtdata.numrows) {
                        vcd->curstate.y += 1;
                        vcd->buffer.pos += vtdata.buffer.sizerow;
                }
        }
        if (vcd->decim)
                vcd_buffer_insert_char(vcd, 1);
        vcd->buffer.buffer[vcd->buffer.pos] = character;
 
        if (vcd->curstate.x + 1 == vtdata.numcolumns)
                vcd->need_wrap = vcd->decawm;
        else {
                vcd->curstate.x ++;
                vcd->buffer.pos ++;
        }
}
 
static void vcd_buffer_erase(struct con_struct *vcd, unsigned char sx, unsigned char sy,
                                unsigned char ex, unsigned char ey)
{
        unsigned int start = sy * vtdata.numcolumns + sx;
        unsigned int end = ey * vtdata.numcolumns + ex + 1;
 
        memsetl (vcd->buffer.buffer + start, (vcd->combined_state & FLG_MASK) | 32, (end - start) << 2);
}
 
struct console_driver buffer_driver = {
        vcd_buffer_gotoxy,
        vcd_buffer_scrollup,
        vcd_buffer_scrolldown,
        vcd_buffer_buffer_pos,
        vcd_buffer_delete_char,
        vcd_buffer_insert_char,
        NULL,
        vcd_buffer_write_char,
        vcd_buffer_erase
};
 
 
static void vcd_screen_gotoxy(struct con_struct *vcd)
{
        vcd->screen.pos = vcd->screen.origin +
                          vcd->curstate.y * vtdata.screen.sizerow +
                          vcd->curstate.x * vtdata.screen.bytespercharh;
        vcd->buffer.pos = vtdata.buffer.origin +
                          vcd->curstate.y * vtdata.buffer.sizerow +
                          vcd->curstate.x;
}
 
static void vcd_screen_scrollup(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)
{
        unsigned int hardware;
 
        if (b > vtdata.numrows || t >= b || l == 0)
                return;
 
        hardware = (b == vtdata.numrows && t == 0);
 
        if (hardware) {
                vcd->buffer.pos -= vtdata.buffer.origin;
                vtdata.buffer.origin += l * vtdata.buffer.sizerow;
                if (vtdata.buffer.origin > vtdata.buffer.lastorigin) {
                        memmove (vtdata.buffer.buffer,
                                 vtdata.buffer.buffer + vtdata.buffer.origin,
                                 (vtdata.buffer.totsize - vtdata.buffer.sizerow) << 2);
                        vtdata.buffer.origin = 0;
                }
                vcd->buffer.pos += vtdata.buffer.origin;
                memsetl (vtdata.buffer.buffer + vtdata.buffer.origin +
                                (vtdata.numrows - l) * vtdata.buffer.sizerow,
                                (vcd->combined_state & FLG_MASK) | 32,
                                l * vtdata.buffer.sizerow << 2);
 
                vcd->screen.pos -= vcd->screen.origin;
                vcd->screen.origin += l * vtdata.screen.sizerow;
                if (vcd->screen.origin >= vtdata.screen.memend)
                        vcd->screen.origin = vcd->screen.origin -
                                        vtdata.screen.memend + vtdata.screen.memstart;
                vcd->screen.pos += vcd->screen.origin;
                memsetl ((void *)(vcd->screen.origin + vtdata.screen.sizerow * (vtdata.numrows - l)),
                        vcd->cached_backcolwrd, l * vtdata.screen.sizerow);
                scroll_set_origin (vcd->screen.origin);
        } else {
                unsigned int old_top, new_top, old_end, new_end;
                unsigned char *origin = (unsigned char *)vcd->screen.origin;
 
                old_top = t;
                new_top = t + l;
                new_end = b;
                old_end = b - l;
 
                if (new_top < new_end) { /* we have something to move */
                        memmove (vtdata.buffer.buffer + vtdata.buffer.origin + old_top * vtdata.buffer.sizerow,
                                 vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,
                                 (new_end - new_top) * vtdata.buffer.sizerow << 2);
                        memmove (origin + old_top * vtdata.screen.sizerow,
                                 origin + new_top * vtdata.screen.sizerow,
                                 (new_end - new_top) * vtdata.screen.sizerow);
                }
                if (old_end < new_end) {
                        if (old_end < old_top)
                                old_end = old_top;
                        memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + old_end * vtdata.buffer.sizerow,
                                 (vcd->combined_state & FLG_MASK) | 32,
                                 (new_end - old_end) * vtdata.buffer.sizerow << 2);
                        memsetl ((unsigned long *)(origin + old_end * vtdata.screen.sizerow),
                                 vcd->cached_backcolwrd,
                                 (new_end - old_end) * vtdata.screen.sizerow);
                }
        }
}
 
static void vcd_screen_scrolldown(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)
{
        unsigned int hardware;
        if (b > vtdata.numrows || t >= b || l == 0)
                return;
 
        hardware = (b == vtdata.numrows && t == 0);
 
        if (hardware) {
                vcd->buffer.pos -= vtdata.buffer.origin;
                vtdata.buffer.origin -= vtdata.buffer.sizerow;
                if ((int)vtdata.buffer.origin < 0) {
                        memmove (vtdata.buffer.buffer + vtdata.buffer.lastorigin + l * vtdata.buffer.sizerow,
                                 vtdata.buffer.buffer,
                                 (vtdata.buffer.totsize - l * vtdata.buffer.sizerow) << 2);
                        vtdata.buffer.origin = vtdata.buffer.lastorigin;
                }
                vcd->buffer.pos += vtdata.buffer.origin;
                memsetl (vtdata.buffer.buffer + vtdata.buffer.origin, (vcd->combined_state & FLG_MASK) | 32,
                                vtdata.buffer.sizerow << 2);
 
                vcd->screen.pos -= vcd->screen.origin;
                vcd->screen.origin -= l * vtdata.screen.sizerow;
                if (vcd->screen.origin < vtdata.screen.memstart)
                        vcd->screen.origin = vcd->screen.origin - vtdata.screen.memstart + vtdata.screen.memend;
                vcd->screen.pos += vcd->screen.origin;
                memsetl ((void *)vcd->screen.origin, vcd->cached_backcolwrd, l * vtdata.screen.sizerow);
                scroll_set_origin (vcd->screen.origin);
        } else {
                unsigned int old_top, new_top, old_end, new_end;
                unsigned char *origin = (unsigned char *)vcd->screen.origin;
 
                new_top = t;
                old_top = t + l;
                old_end = b;
                new_end = b - l;
 
                if (new_top < new_end) { /* we have something to move */
                        memmove (vtdata.buffer.buffer + vtdata.buffer.origin + old_top * vtdata.buffer.sizerow,
                                 vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,
                                 (new_end - new_top) * vtdata.buffer.sizerow << 2);
                        memmove (origin + old_top * vtdata.screen.sizerow,
                                 origin + new_top * vtdata.screen.sizerow,
                                 (new_end - new_top) * vtdata.screen.sizerow);
                }
                if (new_top < old_top) { /* we have something to clear */
                        if (old_top > old_end)
                                old_top = old_end;
                        memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,
                                 (vcd->combined_state & FLG_MASK) | 32,
                                 (old_top - new_top) * vtdata.buffer.sizerow << 2);
                        memsetl ((unsigned long *)(origin + new_top * vtdata.screen.sizerow),
                                 vcd->cached_backcolwrd,
                                 (old_top - new_top) * vtdata.screen.sizerow);
                }
        }
}
 
static unsigned long *vcd_screen_buffer_pos(struct con_struct *vcd, unsigned int offset)
{
        return vtdata.buffer.buffer + vtdata.buffer.origin + offset;
}
 
static void vcd_screen_delete_char (struct con_struct *vcd, unsigned int n)
{
        unsigned int row, clear, movelen, setlen, bpr;
        unsigned char *to, *from;
        unsigned long *buffer;
 
        buffer = vtdata.buffer.buffer + vcd->buffer.pos;
 
        if (n >= vtdata.numcolumns - vcd->curstate.x) {
                n = vtdata.numcolumns - vcd->curstate.x;
                movelen = 0;
        } else {
                movelen = vtdata.numcolumns - vcd->curstate.x - n;
                memmove (buffer, buffer + n, movelen << 2);
        }
        memsetl (buffer + movelen, (vcd->combined_state & FLG_MASK) | 32, n << 2);
 
        clear = vcd->cached_backcolwrd & 255;
        to = (unsigned char *)vcd->screen.pos;
        setlen = n * vtdata.screen.bytespercharh;
        from = to + setlen;
        bpr = vtdata.numcolumns * vtdata.screen.bytespercharh;
        movelen = bpr - setlen - vcd->curstate.x * vtdata.screen.bytespercharh;
 
        for (row = vtdata.screen.bytespercharv; row > 0; row--, to += bpr, from += bpr) {
                memmove (to, from, movelen);
                memset (to + movelen, clear, setlen);
        }
}
 
static void vcd_screen_insert_char (struct con_struct *vcd, unsigned int n)
{
        unsigned int row, clear, movelen, setlen, bpr;
        unsigned char *to, *from;
        unsigned long *buffer;
 
        buffer = vtdata.buffer.buffer + vcd->buffer.pos;
 
        if (n >= vtdata.numcolumns - vcd->curstate.x)
                n = vtdata.numcolumns - vcd->curstate.x;
        else
                memmove (buffer + n, buffer, (vtdata.numcolumns - vcd->curstate.x - n) << 2);
        memsetl (buffer, (vcd->combined_state & FLG_MASK) | 32, n << 2);
 
        clear = vcd->cached_backcolwrd & 255;
        from = (unsigned char *)vcd->screen.pos;
        setlen = n * vtdata.screen.bytespercharh;
        to = from + setlen;
        bpr = vtdata.numcolumns * vtdata.screen.bytespercharh;
        movelen = bpr - setlen - vcd->curstate.x * vtdata.screen.bytespercharh;
 
        for (row = vtdata.screen.bytespercharv; row > 0; row--, to += bpr, from += bpr) {
                memmove (to, from, movelen);
                memset (from, clear, setlen);
        }
}
 
static void vcd_screen_put_char(struct con_struct *vcd, unsigned long character)
{
        char c = character & 255;
 
        if (c == 8) {
                if (!vcd->need_wrap) {
                        vcd->screen.pos -= vtdata.screen.bytespercharh;
                        vcd->buffer.pos --;
                        vcd->curstate.x --;
                } else
                        vcd->need_wrap = 0;
                return;
        }
        if (c == 10 || c == 13 || vcd->need_wrap) {
                vcd->screen.pos -= vcd->curstate.x * vtdata.screen.bytespercharh;
                vcd->buffer.pos -= vcd->curstate.x;
                vcd->need_wrap = vcd->curstate.x = 0;
                if (vcd->curstate.y + 1 == vcd->bottom)
                        vcd_screen_scrollup (vcd, vcd->top, vcd->bottom, 1);
                else if (vcd->curstate.y < vtdata.numrows - 1) {
                        vcd->curstate.y += 1;
                        vcd->buffer.pos += vtdata.buffer.sizerow;
                        vcd->screen.pos += vtdata.screen.sizerow;
                }
                if (c == 10 || c == 13)
                        return;
        }
        ll_write_char (vcd->screen.pos, character);
        vtdata.buffer.buffer[vcd->buffer.pos] = character;
 
        if (vcd->curstate.x + 1 == vtdata.numcolumns)
                vcd->need_wrap = 1;
        else {
                vcd->curstate.x++;
                vcd->screen.pos += vtdata.screen.bytespercharh;
                vcd->buffer.pos ++;
        }
}
 
static void vcd_screen_write_char(struct con_struct *vcd, unsigned long character)
{
        if (vcd->need_wrap) {
                vcd->screen.pos -= vcd->curstate.x * vtdata.screen.bytespercharh;
                vcd->buffer.pos -= vcd->curstate.x;
                vcd->need_wrap = vcd->curstate.x = 0;
                if (vcd->curstate.y + 1 == vcd->bottom)
                        vcd_screen_scrollup(vcd, vcd->top, vcd->bottom, 1);
                else if (vcd->curstate.y + 1 < vtdata.numrows) {
                        vcd->curstate.y += 1;
                        vcd->screen.pos += vtdata.screen.sizerow;
                        vcd->buffer.pos += vtdata.buffer.sizerow;
                }
        }
        if (vcd->decim)
                vcd_screen_insert_char(vcd, 1);
        vtdata.buffer.buffer[vcd->buffer.pos] = character;
        ll_write_char (vcd->screen.pos, character);
 
        if (vcd->curstate.x + 1 == vtdata.numcolumns)
                vcd->need_wrap = vcd->decawm;
        else {
                vcd->curstate.x ++;
                vcd->screen.pos += vtdata.screen.bytespercharh;
                vcd->buffer.pos ++;
        }
}
 
static void vcd_screen_erase (struct con_struct *vcd, unsigned char sx, unsigned char sy,
                      unsigned char ex, unsigned char ey)
{
        unsigned int start = sy * vtdata.numcolumns + sx;
        unsigned int end = ey * vtdata.numcolumns + ex + 1;
        unsigned char *origin;
 
        memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + start,
                 (vcd->combined_state & FLG_MASK) | 32, (end - start) << 2);
        if (sx) { /* erase to end of line */
                unsigned int c, i, increment;
 
                origin = (unsigned char *)vcd->screen.origin +
                                sy * vtdata.screen.sizerow +
                                sx * vtdata.screen.bytespercharh;
                increment = vtdata.numcolumns * vtdata.screen.bytespercharh;
                if (sy == ey)
                        c = (ex - sx + 1) * vtdata.screen.bytespercharh;
                else
                        c = (vtdata.numcolumns - sx) * vtdata.screen.bytespercharh;
 
                for (i = vtdata.screen.bytespercharv; i; i--, origin += increment)
                        memset (origin, vcd->cached_backcolwrd, c);
                sy ++;
        }
 
        if (sy < ey) {
                origin = (unsigned char *)vcd->screen.origin + sy * vtdata.screen.sizerow;
                memset (origin, vcd->cached_backcolwrd, (ey - sy) * vtdata.screen.sizerow);
                sy = ey;
        }
 
        if (sy == ey) {
                unsigned int c, i, increment;
 
                origin = (unsigned char *)vcd->screen.origin +
                                sy * vtdata.screen.sizerow;
                increment = vtdata.numcolumns * vtdata.screen.bytespercharh;
                c = (ex + 1) * vtdata.screen.bytespercharh;
                for (i = vtdata.screen.bytespercharv; i; i--, origin += increment)
                        memset (origin, vcd->cached_backcolwrd, c);
        }
}
 
struct console_driver screen_driver = {
        vcd_screen_gotoxy,
        vcd_screen_scrollup,
        vcd_screen_scrolldown,
        vcd_screen_buffer_pos,
        vcd_screen_delete_char,
        vcd_screen_insert_char,
        vcd_screen_put_char,
        vcd_screen_write_char,
        vcd_screen_erase
};

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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [armnommu/] [drivers/] [char/] [consoledriver.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* linux/arch/arm/drivers/char/consoledriver.c`
3			`*`
4			`* Low-level console routines`
5			`*/`
6			`#include <linux/string.h>`
7
8			`#include <asm/hardware.h>`
9			`#include <asm/io.h>`
10
11			`#include "vt_kern.h"`
12
13			`#define palette_setpixel(p) outl(0x10000000\|((p) & 255), IO_VIDC_BASE)`
14			`#define palette_write(v) outl(0x00000000\|((v) & 0x00ffffff), IO_VIDC_BASE)`
15			`/*`
16			`* Don't allow underline through to erasing/scrolling routines`
17			`*/`
18			`#define FLG_MASK (~(FLG_UNDERLINE << 24))`
19
20			`extern void scroll_set_origin (unsigned long offset);`
21			`extern void ll_write_char(unsigned long ps, unsigned long chinfo);`
22
23			`static void vcd_buffer_gotoxy(struct con_struct *vcd)`
24			`{`
25			`vcd->screen.pos = vcd->screen.origin;`
26			`vcd->buffer.pos = vcd->curstate.y * vtdata.buffer.sizerow +`
27			`vcd->curstate.x;`
28			`}`
29
30			`static void vcd_buffer_scrollup(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)`
31			`{`
32			`unsigned int old_top, new_top, old_end, new_end;`
33
34			`if (b > vtdata.numrows \|\| t >= b \|\| l == 0)`
35			`return;`
36
37			`l *= vtdata.buffer.sizerow;`
38			`old_top = t * vtdata.buffer.sizerow;`
39			`new_top = old_top + l;`
40			`new_end = b * vtdata.buffer.sizerow;`
41			`old_end = new_end - l;`
42
43			`if (new_top < new_end) /* we have something to move */`
44			`memmove (vcd->buffer.buffer + old_top, vcd->buffer.buffer + new_top,`
45			`(new_end - new_top) << 2);`
46
47			`if (old_end < new_end) {`
48			`if (old_end < old_top)`
49			`old_end = old_top;`
50			`memsetl (vcd->buffer.buffer + old_end, (vcd->combined_state & FLG_MASK) \| 32,`
51			`(new_end - old_end) << 2);`
52			`}`
53			`}`
54
55			`static void vcd_buffer_scrolldown(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)`
56			`{`
57			`unsigned int old_top, new_top, old_end, new_end;`
58
59			`if (b > vtdata.numrows \|\| t >= b \|\| l == 0)`
60			`return;`
61
62			`l *= vtdata.buffer.sizerow;`
63			`new_top = t * vtdata.buffer.sizerow;`
64			`old_top = new_top + l;`
65			`old_end = b * vtdata.buffer.sizerow;`
66			`new_end = old_end - l;`
67
68			`if (new_top < new_end) /* we have something to move */`
69			`memmove (vcd->buffer.buffer + old_top, vcd->buffer.buffer + new_top,`
70			`(new_end - new_top) << 2);`
71
72			`if (new_top < old_top) { /* we have something to clear */`
73			`if (old_top > old_end)`
74			`old_top = old_end;`
75			`memsetl (vcd->buffer.buffer + new_top, (vcd->combined_state & FLG_MASK) \| 32,`
76			`(old_top - new_top) << 2);`
77			`}`
78			`}`
79
80			`static unsigned long vcd_buffer_buffer_pos(struct con_struct vcd, unsigned int offset)`
81			`{`
82			`return vcd->buffer.buffer + offset;`
83			`}`
84
85			`static void vcd_buffer_delete_char(struct con_struct *vcd, unsigned int n)`
86			`{`
87			`unsigned long *buffer;`
88			`unsigned int len;`
89
90			`buffer = vcd->buffer.buffer + vcd->buffer.pos;`
91
92			`if (n >= vtdata.numcolumns - vcd->curstate.x) {`
93			`n = vtdata.numcolumns - vcd->curstate.x;`
94			`len = 0;`
95			`} else {`
96			`len = vtdata.numcolumns - vcd->curstate.x - n;`
97			`memmove (buffer, buffer + n, len << 2);`
98			`}`
99			`memsetl (buffer + len, (vcd->combined_state & FLG_MASK) \| 32, n << 2);`
100			`}`
101
102			`static void vcd_buffer_insert_char(struct con_struct *vcd, unsigned int n)`
103			`{`
104			`unsigned long *buffer;`
105
106			`buffer = vcd->buffer.buffer + vcd->buffer.pos;`
107
108			`if (n >= vtdata.numcolumns - vcd->curstate.x)`
109			`n = vtdata.numcolumns - vcd->curstate.x;`
110			`else`
111			`memmove (buffer + n, buffer, (vtdata.numcolumns - vcd->curstate.x - n) << 2);`
112			`memsetl (buffer, (vcd->combined_state & FLG_MASK) \| 32, n << 2);`
113			`}`
114
115			`static void vcd_buffer_write_char(struct con_struct *vcd, unsigned long character)`
116			`{`
117			`if (vcd->need_wrap) {`
118			`vcd->buffer.pos -= vcd->curstate.x;`
119			`vcd->need_wrap = vcd->curstate.x = 0;`
120			`if (vcd->curstate.y + 1 == vcd->bottom)`
121			`vcd_buffer_scrollup(vcd, vcd->top, vcd->bottom, 1);`
122			`else if (vcd->curstate.y + 1 < vtdata.numrows) {`
123			`vcd->curstate.y += 1;`
124			`vcd->buffer.pos += vtdata.buffer.sizerow;`
125			`}`
126			`}`
127			`if (vcd->decim)`
128			`vcd_buffer_insert_char(vcd, 1);`
129			`vcd->buffer.buffer[vcd->buffer.pos] = character;`
130
131			`if (vcd->curstate.x + 1 == vtdata.numcolumns)`
132			`vcd->need_wrap = vcd->decawm;`
133			`else {`
134			`vcd->curstate.x ++;`
135			`vcd->buffer.pos ++;`
136			`}`
137			`}`
138
139			`static void vcd_buffer_erase(struct con_struct *vcd, unsigned char sx, unsigned char sy,`
140			`unsigned char ex, unsigned char ey)`
141			`{`
142			`unsigned int start = sy * vtdata.numcolumns + sx;`
143			`unsigned int end = ey * vtdata.numcolumns + ex + 1;`
144
145			`memsetl (vcd->buffer.buffer + start, (vcd->combined_state & FLG_MASK) \| 32, (end - start) << 2);`
146			`}`
147
148			`struct console_driver buffer_driver = {`
149			`vcd_buffer_gotoxy,`
150			`vcd_buffer_scrollup,`
151			`vcd_buffer_scrolldown,`
152			`vcd_buffer_buffer_pos,`
153			`vcd_buffer_delete_char,`
154			`vcd_buffer_insert_char,`
155			`NULL,`
156			`vcd_buffer_write_char,`
157			`vcd_buffer_erase`
158			`};`
159
160
161			`static void vcd_screen_gotoxy(struct con_struct *vcd)`
162			`{`
163			`vcd->screen.pos = vcd->screen.origin +`
164			`vcd->curstate.y * vtdata.screen.sizerow +`
165			`vcd->curstate.x * vtdata.screen.bytespercharh;`
166			`vcd->buffer.pos = vtdata.buffer.origin +`
167			`vcd->curstate.y * vtdata.buffer.sizerow +`
168			`vcd->curstate.x;`
169			`}`
170
171			`static void vcd_screen_scrollup(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)`
172			`{`
173			`unsigned int hardware;`
174
175			`if (b > vtdata.numrows \|\| t >= b \|\| l == 0)`
176			`return;`
177
178			`hardware = (b == vtdata.numrows && t == 0);`
179
180			`if (hardware) {`
181			`vcd->buffer.pos -= vtdata.buffer.origin;`
182			`vtdata.buffer.origin += l * vtdata.buffer.sizerow;`
183			`if (vtdata.buffer.origin > vtdata.buffer.lastorigin) {`
184			`memmove (vtdata.buffer.buffer,`
185			`vtdata.buffer.buffer + vtdata.buffer.origin,`
186			`(vtdata.buffer.totsize - vtdata.buffer.sizerow) << 2);`
187			`vtdata.buffer.origin = 0;`
188			`}`
189			`vcd->buffer.pos += vtdata.buffer.origin;`
190			`memsetl (vtdata.buffer.buffer + vtdata.buffer.origin +`
191			`(vtdata.numrows - l) * vtdata.buffer.sizerow,`
192			`(vcd->combined_state & FLG_MASK) \| 32,`
193			`l * vtdata.buffer.sizerow << 2);`
194
195			`vcd->screen.pos -= vcd->screen.origin;`
196			`vcd->screen.origin += l * vtdata.screen.sizerow;`
197			`if (vcd->screen.origin >= vtdata.screen.memend)`
198			`vcd->screen.origin = vcd->screen.origin -`
199			`vtdata.screen.memend + vtdata.screen.memstart;`
200			`vcd->screen.pos += vcd->screen.origin;`
201			`memsetl ((void )(vcd->screen.origin + vtdata.screen.sizerow (vtdata.numrows - l)),`
202			`vcd->cached_backcolwrd, l * vtdata.screen.sizerow);`
203			`scroll_set_origin (vcd->screen.origin);`
204			`} else {`
205			`unsigned int old_top, new_top, old_end, new_end;`
206			`unsigned char origin = (unsigned char )vcd->screen.origin;`
207
208			`old_top = t;`
209			`new_top = t + l;`
210			`new_end = b;`
211			`old_end = b - l;`
212
213			`if (new_top < new_end) { /* we have something to move */`
214			`memmove (vtdata.buffer.buffer + vtdata.buffer.origin + old_top * vtdata.buffer.sizerow,`
215			`vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,`
216			`(new_end - new_top) * vtdata.buffer.sizerow << 2);`
217			`memmove (origin + old_top * vtdata.screen.sizerow,`
218			`origin + new_top * vtdata.screen.sizerow,`
219			`(new_end - new_top) * vtdata.screen.sizerow);`
220			`}`
221			`if (old_end < new_end) {`
222			`if (old_end < old_top)`
223			`old_end = old_top;`
224			`memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + old_end * vtdata.buffer.sizerow,`
225			`(vcd->combined_state & FLG_MASK) \| 32,`
226			`(new_end - old_end) * vtdata.buffer.sizerow << 2);`
227			`memsetl ((unsigned long )(origin + old_end vtdata.screen.sizerow),`
228			`vcd->cached_backcolwrd,`
229			`(new_end - old_end) * vtdata.screen.sizerow);`
230			`}`
231			`}`
232			`}`
233
234			`static void vcd_screen_scrolldown(struct con_struct *vcd, unsigned int t, unsigned int b, unsigned int l)`
235			`{`
236			`unsigned int hardware;`
237			`if (b > vtdata.numrows \|\| t >= b \|\| l == 0)`
238			`return;`
239
240			`hardware = (b == vtdata.numrows && t == 0);`
241
242			`if (hardware) {`
243			`vcd->buffer.pos -= vtdata.buffer.origin;`
244			`vtdata.buffer.origin -= vtdata.buffer.sizerow;`
245			`if ((int)vtdata.buffer.origin < 0) {`
246			`memmove (vtdata.buffer.buffer + vtdata.buffer.lastorigin + l * vtdata.buffer.sizerow,`
247			`vtdata.buffer.buffer,`
248			`(vtdata.buffer.totsize - l * vtdata.buffer.sizerow) << 2);`
249			`vtdata.buffer.origin = vtdata.buffer.lastorigin;`
250			`}`
251			`vcd->buffer.pos += vtdata.buffer.origin;`
252			`memsetl (vtdata.buffer.buffer + vtdata.buffer.origin, (vcd->combined_state & FLG_MASK) \| 32,`
253			`vtdata.buffer.sizerow << 2);`
254
255			`vcd->screen.pos -= vcd->screen.origin;`
256			`vcd->screen.origin -= l * vtdata.screen.sizerow;`
257			`if (vcd->screen.origin < vtdata.screen.memstart)`
258			`vcd->screen.origin = vcd->screen.origin - vtdata.screen.memstart + vtdata.screen.memend;`
259			`vcd->screen.pos += vcd->screen.origin;`
260			`memsetl ((void )vcd->screen.origin, vcd->cached_backcolwrd, l vtdata.screen.sizerow);`
261			`scroll_set_origin (vcd->screen.origin);`
262			`} else {`
263			`unsigned int old_top, new_top, old_end, new_end;`
264			`unsigned char origin = (unsigned char )vcd->screen.origin;`
265
266			`new_top = t;`
267			`old_top = t + l;`
268			`old_end = b;`
269			`new_end = b - l;`
270
271			`if (new_top < new_end) { /* we have something to move */`
272			`memmove (vtdata.buffer.buffer + vtdata.buffer.origin + old_top * vtdata.buffer.sizerow,`
273			`vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,`
274			`(new_end - new_top) * vtdata.buffer.sizerow << 2);`
275			`memmove (origin + old_top * vtdata.screen.sizerow,`
276			`origin + new_top * vtdata.screen.sizerow,`
277			`(new_end - new_top) * vtdata.screen.sizerow);`
278			`}`
279			`if (new_top < old_top) { /* we have something to clear */`
280			`if (old_top > old_end)`
281			`old_top = old_end;`
282			`memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + new_top * vtdata.buffer.sizerow,`
283			`(vcd->combined_state & FLG_MASK) \| 32,`
284			`(old_top - new_top) * vtdata.buffer.sizerow << 2);`
285			`memsetl ((unsigned long )(origin + new_top vtdata.screen.sizerow),`
286			`vcd->cached_backcolwrd,`
287			`(old_top - new_top) * vtdata.screen.sizerow);`
288			`}`
289			`}`
290			`}`
291
292			`static unsigned long vcd_screen_buffer_pos(struct con_struct vcd, unsigned int offset)`
293			`{`
294			`return vtdata.buffer.buffer + vtdata.buffer.origin + offset;`
295			`}`
296
297			`static void vcd_screen_delete_char (struct con_struct *vcd, unsigned int n)`
298			`{`
299			`unsigned int row, clear, movelen, setlen, bpr;`
300			`unsigned char to, from;`
301			`unsigned long *buffer;`
302
303			`buffer = vtdata.buffer.buffer + vcd->buffer.pos;`
304
305			`if (n >= vtdata.numcolumns - vcd->curstate.x) {`
306			`n = vtdata.numcolumns - vcd->curstate.x;`
307			`movelen = 0;`
308			`} else {`
309			`movelen = vtdata.numcolumns - vcd->curstate.x - n;`
310			`memmove (buffer, buffer + n, movelen << 2);`
311			`}`
312			`memsetl (buffer + movelen, (vcd->combined_state & FLG_MASK) \| 32, n << 2);`
313
314			`clear = vcd->cached_backcolwrd & 255;`
315			`to = (unsigned char *)vcd->screen.pos;`
316			`setlen = n * vtdata.screen.bytespercharh;`
317			`from = to + setlen;`
318			`bpr = vtdata.numcolumns * vtdata.screen.bytespercharh;`
319			`movelen = bpr - setlen - vcd->curstate.x * vtdata.screen.bytespercharh;`
320
321			`for (row = vtdata.screen.bytespercharv; row > 0; row--, to += bpr, from += bpr) {`
322			`memmove (to, from, movelen);`
323			`memset (to + movelen, clear, setlen);`
324			`}`
325			`}`
326
327			`static void vcd_screen_insert_char (struct con_struct *vcd, unsigned int n)`
328			`{`
329			`unsigned int row, clear, movelen, setlen, bpr;`
330			`unsigned char to, from;`
331			`unsigned long *buffer;`
332
333			`buffer = vtdata.buffer.buffer + vcd->buffer.pos;`
334
335			`if (n >= vtdata.numcolumns - vcd->curstate.x)`
336			`n = vtdata.numcolumns - vcd->curstate.x;`
337			`else`
338			`memmove (buffer + n, buffer, (vtdata.numcolumns - vcd->curstate.x - n) << 2);`
339			`memsetl (buffer, (vcd->combined_state & FLG_MASK) \| 32, n << 2);`
340
341			`clear = vcd->cached_backcolwrd & 255;`
342			`from = (unsigned char *)vcd->screen.pos;`
343			`setlen = n * vtdata.screen.bytespercharh;`
344			`to = from + setlen;`
345			`bpr = vtdata.numcolumns * vtdata.screen.bytespercharh;`
346			`movelen = bpr - setlen - vcd->curstate.x * vtdata.screen.bytespercharh;`
347
348			`for (row = vtdata.screen.bytespercharv; row > 0; row--, to += bpr, from += bpr) {`
349			`memmove (to, from, movelen);`
350			`memset (from, clear, setlen);`
351			`}`
352			`}`
353
354			`static void vcd_screen_put_char(struct con_struct *vcd, unsigned long character)`
355			`{`
356			`char c = character & 255;`
357
358			`if (c == 8) {`
359			`if (!vcd->need_wrap) {`
360			`vcd->screen.pos -= vtdata.screen.bytespercharh;`
361			`vcd->buffer.pos --;`
362			`vcd->curstate.x --;`
363			`} else`
364			`vcd->need_wrap = 0;`
365			`return;`
366			`}`
367			`if (c == 10 \|\| c == 13 \|\| vcd->need_wrap) {`
368			`vcd->screen.pos -= vcd->curstate.x * vtdata.screen.bytespercharh;`
369			`vcd->buffer.pos -= vcd->curstate.x;`
370			`vcd->need_wrap = vcd->curstate.x = 0;`
371			`if (vcd->curstate.y + 1 == vcd->bottom)`
372			`vcd_screen_scrollup (vcd, vcd->top, vcd->bottom, 1);`
373			`else if (vcd->curstate.y < vtdata.numrows - 1) {`
374			`vcd->curstate.y += 1;`
375			`vcd->buffer.pos += vtdata.buffer.sizerow;`
376			`vcd->screen.pos += vtdata.screen.sizerow;`
377			`}`
378			`if (c == 10 \|\| c == 13)`
379			`return;`
380			`}`
381			`ll_write_char (vcd->screen.pos, character);`
382			`vtdata.buffer.buffer[vcd->buffer.pos] = character;`
383
384			`if (vcd->curstate.x + 1 == vtdata.numcolumns)`
385			`vcd->need_wrap = 1;`
386			`else {`
387			`vcd->curstate.x++;`
388			`vcd->screen.pos += vtdata.screen.bytespercharh;`
389			`vcd->buffer.pos ++;`
390			`}`
391			`}`
392
393			`static void vcd_screen_write_char(struct con_struct *vcd, unsigned long character)`
394			`{`
395			`if (vcd->need_wrap) {`
396			`vcd->screen.pos -= vcd->curstate.x * vtdata.screen.bytespercharh;`
397			`vcd->buffer.pos -= vcd->curstate.x;`
398			`vcd->need_wrap = vcd->curstate.x = 0;`
399			`if (vcd->curstate.y + 1 == vcd->bottom)`
400			`vcd_screen_scrollup(vcd, vcd->top, vcd->bottom, 1);`
401			`else if (vcd->curstate.y + 1 < vtdata.numrows) {`
402			`vcd->curstate.y += 1;`
403			`vcd->screen.pos += vtdata.screen.sizerow;`
404			`vcd->buffer.pos += vtdata.buffer.sizerow;`
405			`}`
406			`}`
407			`if (vcd->decim)`
408			`vcd_screen_insert_char(vcd, 1);`
409			`vtdata.buffer.buffer[vcd->buffer.pos] = character;`
410			`ll_write_char (vcd->screen.pos, character);`
411
412			`if (vcd->curstate.x + 1 == vtdata.numcolumns)`
413			`vcd->need_wrap = vcd->decawm;`
414			`else {`
415			`vcd->curstate.x ++;`
416			`vcd->screen.pos += vtdata.screen.bytespercharh;`
417			`vcd->buffer.pos ++;`
418			`}`
419			`}`
420
421			`static void vcd_screen_erase (struct con_struct *vcd, unsigned char sx, unsigned char sy,`
422			`unsigned char ex, unsigned char ey)`
423			`{`
424			`unsigned int start = sy * vtdata.numcolumns + sx;`
425			`unsigned int end = ey * vtdata.numcolumns + ex + 1;`
426			`unsigned char *origin;`
427
428			`memsetl (vtdata.buffer.buffer + vtdata.buffer.origin + start,`
429			`(vcd->combined_state & FLG_MASK) \| 32, (end - start) << 2);`
430			`if (sx) { /* erase to end of line */`
431			`unsigned int c, i, increment;`
432
433			`origin = (unsigned char *)vcd->screen.origin +`
434			`sy * vtdata.screen.sizerow +`
435			`sx * vtdata.screen.bytespercharh;`
436			`increment = vtdata.numcolumns * vtdata.screen.bytespercharh;`
437			`if (sy == ey)`
438			`c = (ex - sx + 1) * vtdata.screen.bytespercharh;`
439			`else`
440			`c = (vtdata.numcolumns - sx) * vtdata.screen.bytespercharh;`
441
442			`for (i = vtdata.screen.bytespercharv; i; i--, origin += increment)`
443			`memset (origin, vcd->cached_backcolwrd, c);`
444			`sy ++;`
445			`}`
446
447			`if (sy < ey) {`
448			`origin = (unsigned char )vcd->screen.origin + sy vtdata.screen.sizerow;`
449			`memset (origin, vcd->cached_backcolwrd, (ey - sy) * vtdata.screen.sizerow);`
450			`sy = ey;`
451			`}`
452
453			`if (sy == ey) {`
454			`unsigned int c, i, increment;`
455
456			`origin = (unsigned char *)vcd->screen.origin +`
457			`sy * vtdata.screen.sizerow;`
458			`increment = vtdata.numcolumns * vtdata.screen.bytespercharh;`
459			`c = (ex + 1) * vtdata.screen.bytespercharh;`
460			`for (i = vtdata.screen.bytespercharv; i; i--, origin += increment)`
461			`memset (origin, vcd->cached_backcolwrd, c);`
462			`}`
463			`}`
464
465			`struct console_driver screen_driver = {`
466			`vcd_screen_gotoxy,`
467			`vcd_screen_scrollup,`
468			`vcd_screen_scrolldown,`
469			`vcd_screen_buffer_pos,`
470			`vcd_screen_delete_char,`
471			`vcd_screen_insert_char,`
472			`vcd_screen_put_char,`
473			`vcd_screen_write_char,`
474			`vcd_screen_erase`
475			`};`