static DEFINE_SPINLOCK(vga_lock);
static int cursor_size_lastfrom;
static int cursor_size_lastto;
+static u32 vgacon_xres;
+static u32 vgacon_yres;
static struct vgastate state;
#define BLANK 0x0020
* appear.
*/
#undef TRIDENT_GLITCH
-
+#define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */
/*
* Interface used by the world
*/
static void vgacon_invert_region(struct vc_data *c, u16 * p, int count);
static unsigned long vgacon_uni_pagedir[2];
-
/* Description of the hardware situation */
static unsigned long vga_vram_base; /* Base of video memory */
static unsigned long vga_vram_end; /* End of video memory */
spin_unlock_irqrestore(&vga_lock, flags);
}
+static inline void vga_set_mem_top(struct vc_data *c)
+{
+ write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
+}
+
+#ifdef CONFIG_VGACON_SOFT_SCROLLBACK
+#include <linux/bootmem.h>
+/* software scrollback */
+static void *vgacon_scrollback;
+static int vgacon_scrollback_tail;
+static int vgacon_scrollback_size;
+static int vgacon_scrollback_rows;
+static int vgacon_scrollback_cnt;
+static int vgacon_scrollback_cur;
+static int vgacon_scrollback_save;
+static int vgacon_scrollback_restore;
+
+static void vgacon_scrollback_init(int pitch)
+{
+ int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch;
+
+ if (vgacon_scrollback) {
+ vgacon_scrollback_cnt = 0;
+ vgacon_scrollback_tail = 0;
+ vgacon_scrollback_cur = 0;
+ vgacon_scrollback_rows = rows - 1;
+ vgacon_scrollback_size = rows * pitch;
+ }
+}
+
+static void __init vgacon_scrollback_startup(void)
+{
+ vgacon_scrollback = alloc_bootmem(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE
+ * 1024);
+ vgacon_scrollback_init(vga_video_num_columns * 2);
+}
+
+static void vgacon_scrollback_update(struct vc_data *c, int t, int count)
+{
+ void *p;
+
+ if (!vgacon_scrollback_size || c->vc_num != fg_console)
+ return;
+
+ p = (void *) (c->vc_origin + t * c->vc_size_row);
+
+ while (count--) {
+ scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail,
+ p, c->vc_size_row);
+ vgacon_scrollback_cnt++;
+ p += c->vc_size_row;
+ vgacon_scrollback_tail += c->vc_size_row;
+
+ if (vgacon_scrollback_tail >= vgacon_scrollback_size)
+ vgacon_scrollback_tail = 0;
+
+ if (vgacon_scrollback_cnt > vgacon_scrollback_rows)
+ vgacon_scrollback_cnt = vgacon_scrollback_rows;
+
+ vgacon_scrollback_cur = vgacon_scrollback_cnt;
+ }
+}
+
+static void vgacon_restore_screen(struct vc_data *c)
+{
+ vgacon_scrollback_save = 0;
+
+ if (!vga_is_gfx && !vgacon_scrollback_restore) {
+ scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
+ c->vc_screenbuf_size > vga_vram_size ?
+ vga_vram_size : c->vc_screenbuf_size);
+ vgacon_scrollback_restore = 1;
+ vgacon_scrollback_cur = vgacon_scrollback_cnt;
+ }
+}
+
+static int vgacon_scrolldelta(struct vc_data *c, int lines)
+{
+ int start, end, count, soff, diff;
+ void *d, *s;
+
+ if (!lines) {
+ c->vc_visible_origin = c->vc_origin;
+ vga_set_mem_top(c);
+ return 1;
+ }
+
+ if (!vgacon_scrollback)
+ return 1;
+
+ if (!vgacon_scrollback_save) {
+ vgacon_cursor(c, CM_ERASE);
+ vgacon_save_screen(c);
+ vgacon_scrollback_save = 1;
+ }
+
+ vgacon_scrollback_restore = 0;
+ start = vgacon_scrollback_cur + lines;
+ end = start + abs(lines);
+
+ if (start < 0)
+ start = 0;
+
+ if (start > vgacon_scrollback_cnt)
+ start = vgacon_scrollback_cnt;
+
+ if (end < 0)
+ end = 0;
+
+ if (end > vgacon_scrollback_cnt)
+ end = vgacon_scrollback_cnt;
+
+ vgacon_scrollback_cur = start;
+ count = end - start;
+ soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) *
+ c->vc_size_row);
+ soff -= count * c->vc_size_row;
+
+ if (soff < 0)
+ soff += vgacon_scrollback_size;
+
+ count = vgacon_scrollback_cnt - start;
+
+ if (count > c->vc_rows)
+ count = c->vc_rows;
+
+ diff = c->vc_rows - count;
+
+ d = (void *) c->vc_origin;
+ s = (void *) c->vc_screenbuf;
+
+ while (count--) {
+ scr_memcpyw(d, vgacon_scrollback + soff, c->vc_size_row);
+ d += c->vc_size_row;
+ soff += c->vc_size_row;
+
+ if (soff >= vgacon_scrollback_size)
+ soff = 0;
+ }
+
+ if (diff == c->vc_rows) {
+ vgacon_cursor(c, CM_MOVE);
+ } else {
+ while (diff--) {
+ scr_memcpyw(d, s, c->vc_size_row);
+ d += c->vc_size_row;
+ s += c->vc_size_row;
+ }
+ }
+
+ return 1;
+}
+#else
+#define vgacon_scrollback_startup(...) do { } while (0)
+#define vgacon_scrollback_init(...) do { } while (0)
+#define vgacon_scrollback_update(...) do { } while (0)
+
+static void vgacon_restore_screen(struct vc_data *c)
+{
+ if (c->vc_origin != c->vc_visible_origin)
+ vgacon_scrolldelta(c, 0);
+}
+
+static int vgacon_scrolldelta(struct vc_data *c, int lines)
+{
+ if (!lines) /* Turn scrollback off */
+ c->vc_visible_origin = c->vc_origin;
+ else {
+ int margin = c->vc_size_row * 4;
+ int ul, we, p, st;
+
+ if (vga_rolled_over >
+ (c->vc_scr_end - vga_vram_base) + margin) {
+ ul = c->vc_scr_end - vga_vram_base;
+ we = vga_rolled_over + c->vc_size_row;
+ } else {
+ ul = 0;
+ we = vga_vram_size;
+ }
+ p = (c->vc_visible_origin - vga_vram_base - ul + we) % we +
+ lines * c->vc_size_row;
+ st = (c->vc_origin - vga_vram_base - ul + we) % we;
+ if (st < 2 * margin)
+ margin = 0;
+ if (p < margin)
+ p = 0;
+ if (p > st - margin)
+ p = st;
+ c->vc_visible_origin = vga_vram_base + (p + ul) % we;
+ }
+ vga_set_mem_top(c);
+ return 1;
+}
+#endif /* CONFIG_VGACON_SOFT_SCROLLBACK */
+
static const char __init *vgacon_startup(void)
{
const char *display_desc = NULL;
static struct resource ega_console_resource =
{ "ega", 0x3B0, 0x3BF };
vga_video_type = VIDEO_TYPE_EGAM;
- vga_vram_end = 0xb8000;
+ vga_vram_size = 0x8000;
display_desc = "EGA+";
request_resource(&ioport_resource,
&ega_console_resource);
static struct resource mda2_console_resource =
{ "mda", 0x3BF, 0x3BF };
vga_video_type = VIDEO_TYPE_MDA;
- vga_vram_end = 0xb2000;
+ vga_vram_size = 0x2000;
display_desc = "*MDA";
request_resource(&ioport_resource,
&mda1_console_resource);
if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) {
int i;
- vga_vram_end = 0xc0000;
+ vga_vram_size = 0x8000;
if (!ORIG_VIDEO_ISVGA) {
static struct resource ega_console_resource
* and COE=1 isn't necessarily a good idea)
*/
vga_vram_base = 0xa0000;
- vga_vram_end = 0xb0000;
+ vga_vram_size = 0x10000;
outb_p(6, VGA_GFX_I);
outb_p(6, VGA_GFX_D);
#endif
static struct resource cga_console_resource =
{ "cga", 0x3D4, 0x3D5 };
vga_video_type = VIDEO_TYPE_CGA;
- vga_vram_end = 0xba000;
+ vga_vram_size = 0x2000;
display_desc = "*CGA";
request_resource(&ioport_resource,
&cga_console_resource);
}
}
- vga_vram_base = VGA_MAP_MEM(vga_vram_base);
- vga_vram_end = VGA_MAP_MEM(vga_vram_end);
- vga_vram_size = vga_vram_end - vga_vram_base;
+ vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size);
+ vga_vram_end = vga_vram_base + vga_vram_size;
/*
* Find out if there is a graphics card present.
vga_scan_lines =
vga_video_font_height * vga_video_num_lines;
}
+
+ vgacon_xres = ORIG_VIDEO_COLS * VGA_FONTWIDTH;
+ vgacon_yres = vga_scan_lines;
+ vgacon_scrollback_startup();
return display_desc;
}
con_set_default_unimap(c);
}
-static inline void vga_set_mem_top(struct vc_data *c)
-{
- write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
-}
-
static void vgacon_deinit(struct vc_data *c)
{
/* When closing the last console, reset video origin */
cursor_size_lastto = to;
spin_lock_irqsave(&vga_lock, flags);
- outb_p(0x0a, vga_video_port_reg); /* Cursor start */
- curs = inb_p(vga_video_port_val);
- outb_p(0x0b, vga_video_port_reg); /* Cursor end */
- cure = inb_p(vga_video_port_val);
+ if (vga_video_type >= VIDEO_TYPE_VGAC) {
+ outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg);
+ curs = inb_p(vga_video_port_val);
+ outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg);
+ cure = inb_p(vga_video_port_val);
+ } else {
+ curs = 0;
+ cure = 0;
+ }
curs = (curs & 0xc0) | from;
cure = (cure & 0xe0) | to;
- outb_p(0x0a, vga_video_port_reg); /* Cursor start */
+ outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg);
outb_p(curs, vga_video_port_val);
- outb_p(0x0b, vga_video_port_reg); /* Cursor end */
+ outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg);
outb_p(cure, vga_video_port_val);
spin_unlock_irqrestore(&vga_lock, flags);
}
static void vgacon_cursor(struct vc_data *c, int mode)
{
- if (c->vc_origin != c->vc_visible_origin)
- vgacon_scrolldelta(c, 0);
+ vgacon_restore_screen(c);
+
switch (mode) {
case CM_ERASE:
write_vga(14, (c->vc_pos - vga_vram_base) / 2);
- vgacon_set_cursor_size(c->vc_x, 31, 30);
+ if (vga_video_type >= VIDEO_TYPE_VGAC)
+ vgacon_set_cursor_size(c->vc_x, 31, 30);
+ else
+ vgacon_set_cursor_size(c->vc_x, 31, 31);
break;
case CM_MOVE:
10 ? 1 : 2));
break;
case CUR_NONE:
- vgacon_set_cursor_size(c->vc_x, 31, 30);
+ if (vga_video_type >= VIDEO_TYPE_VGAC)
+ vgacon_set_cursor_size(c->vc_x, 31, 30);
+ else
+ vgacon_set_cursor_size(c->vc_x, 31, 31);
break;
default:
vgacon_set_cursor_size(c->vc_x, 1,
{
unsigned long flags;
unsigned int scanlines = height * c->vc_font.height;
- u8 scanlines_lo, r7, vsync_end, mode;
+ u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan;
spin_lock_irqsave(&vga_lock, flags);
- outb_p(VGA_CRTC_MODE, vga_video_port_reg);
- mode = inb_p(vga_video_port_val);
+ vgacon_xres = width * VGA_FONTWIDTH;
+ vgacon_yres = height * c->vc_font.height;
+ if (vga_video_type >= VIDEO_TYPE_VGAC) {
+ outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg);
+ max_scan = inb_p(vga_video_port_val);
+
+ if (max_scan & 0x80)
+ scanlines <<= 1;
- if (mode & 0x04)
- scanlines >>= 1;
+ outb_p(VGA_CRTC_MODE, vga_video_port_reg);
+ mode = inb_p(vga_video_port_val);
- scanlines -= 1;
- scanlines_lo = scanlines & 0xff;
+ if (mode & 0x04)
+ scanlines >>= 1;
- outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
- r7 = inb_p(vga_video_port_val) & ~0x42;
+ scanlines -= 1;
+ scanlines_lo = scanlines & 0xff;
- if (scanlines & 0x100)
- r7 |= 0x02;
- if (scanlines & 0x200)
- r7 |= 0x40;
+ outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
+ r7 = inb_p(vga_video_port_val) & ~0x42;
- /* deprotect registers */
- outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
- vsync_end = inb_p(vga_video_port_val);
- outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
- outb_p(vsync_end & ~0x80, vga_video_port_val);
+ if (scanlines & 0x100)
+ r7 |= 0x02;
+ if (scanlines & 0x200)
+ r7 |= 0x40;
+
+ /* deprotect registers */
+ outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
+ vsync_end = inb_p(vga_video_port_val);
+ outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
+ outb_p(vsync_end & ~0x80, vga_video_port_val);
+ }
outb_p(VGA_CRTC_H_DISP, vga_video_port_reg);
outb_p(width - 1, vga_video_port_val);
outb_p(VGA_CRTC_OFFSET, vga_video_port_reg);
outb_p(width >> 1, vga_video_port_val);
- outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg);
- outb_p(scanlines_lo, vga_video_port_val);
- outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
- outb_p(r7,vga_video_port_val);
+ if (vga_video_type >= VIDEO_TYPE_VGAC) {
+ outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg);
+ outb_p(scanlines_lo, vga_video_port_val);
+ outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg);
+ outb_p(r7,vga_video_port_val);
- /* reprotect registers */
- outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
- outb_p(vsync_end, vga_video_port_val);
+ /* reprotect registers */
+ outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg);
+ outb_p(vsync_end, vga_video_port_val);
+ }
spin_unlock_irqrestore(&vga_lock, flags);
-
return 0;
}
static int vgacon_switch(struct vc_data *c)
{
+ int x = c->vc_cols * VGA_FONTWIDTH;
+ int y = c->vc_rows * c->vc_font.height;
+ int rows = ORIG_VIDEO_LINES * vga_default_font_height/
+ c->vc_font.height;
/*
* We need to save screen size here as it's the only way
* we can spot the screen has been resized and we need to
scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
c->vc_screenbuf_size > vga_vram_size ?
vga_vram_size : c->vc_screenbuf_size);
- if (!(vga_video_num_columns % 2) &&
- vga_video_num_columns <= ORIG_VIDEO_COLS &&
- vga_video_num_lines <= (ORIG_VIDEO_LINES *
- vga_default_font_height) / c->vc_font.height)
+
+ if ((vgacon_xres != x || vgacon_yres != y) &&
+ (!(vga_video_num_columns % 2) &&
+ vga_video_num_columns <= ORIG_VIDEO_COLS &&
+ vga_video_num_lines <= rows))
vgacon_doresize(c, c->vc_cols, c->vc_rows);
}
+ vgacon_scrollback_init(c->vc_size_row);
return 0; /* Redrawing not needed */
}
char *charmap;
if (vga_video_type != VIDEO_TYPE_EGAM) {
- charmap = (char *) VGA_MAP_MEM(colourmap);
+ charmap = (char *) VGA_MAP_MEM(colourmap, 0);
beg = 0x0e;
#ifdef VGA_CAN_DO_64KB
if (vga_video_type == VIDEO_TYPE_VGAC)
beg = 0x06;
#endif
} else {
- charmap = (char *) VGA_MAP_MEM(blackwmap);
+ charmap = (char *) VGA_MAP_MEM(blackwmap, 0);
beg = 0x0a;
}
outb_p(0x12, vga_video_port_reg); /* Vertical display limit */
outb_p(vde, vga_video_port_val);
spin_unlock_irq(&vga_lock);
+ vga_video_font_height = fontheight;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
struct vc_data *c = vc_cons[i].d;
if (vga_video_type < VIDEO_TYPE_EGAM)
return -EINVAL;
- if (font->width != 8 || (charcount != 256 && charcount != 512))
+ if (font->width != VGA_FONTWIDTH ||
+ (charcount != 256 && charcount != 512))
return -EINVAL;
rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512);
if (vga_video_type < VIDEO_TYPE_EGAM)
return -EINVAL;
- font->width = 8;
+ font->width = VGA_FONTWIDTH;
font->height = c->vc_font.height;
font->charcount = vga_512_chars ? 512 : 256;
if (!font->data)
return 0;
}
-static int vgacon_scrolldelta(struct vc_data *c, int lines)
-{
- if (!lines) /* Turn scrollback off */
- c->vc_visible_origin = c->vc_origin;
- else {
- int margin = c->vc_size_row * 4;
- int ul, we, p, st;
-
- if (vga_rolled_over >
- (c->vc_scr_end - vga_vram_base) + margin) {
- ul = c->vc_scr_end - vga_vram_base;
- we = vga_rolled_over + c->vc_size_row;
- } else {
- ul = 0;
- we = vga_vram_size;
- }
- p = (c->vc_visible_origin - vga_vram_base - ul + we) % we +
- lines * c->vc_size_row;
- st = (c->vc_origin - vga_vram_base - ul + we) % we;
- if (st < 2 * margin)
- margin = 0;
- if (p < margin)
- p = 0;
- if (p > st - margin)
- p = st;
- c->vc_visible_origin = vga_vram_base + (p + ul) % we;
- }
- vga_set_mem_top(c);
- return 1;
-}
-
static int vgacon_set_origin(struct vc_data *c)
{
if (vga_is_gfx || /* We don't play origin tricks in graphic modes */
if (t || b != c->vc_rows || vga_is_gfx)
return 0;
- if (c->vc_origin != c->vc_visible_origin)
- vgacon_scrolldelta(c, 0);
-
if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2)
return 0;
+ vgacon_restore_screen(c);
oldo = c->vc_origin;
delta = lines * c->vc_size_row;
if (dir == SM_UP) {
+ vgacon_scrollback_update(c, t, lines);
if (c->vc_scr_end + delta >= vga_vram_end) {
scr_memcpyw((u16 *) vga_vram_base,
(u16 *) (oldo + delta),
projects / mirror_ubuntu-bionic-kernel.git / blobdiff