int restore_vga (struct vgastate *state)
{
if (state->vidstate == NULL)
return 1;
if (state->flags & VGA_SAVE_MODE)
restore_vga_mode(state);
if (state->flags & VGA_SAVE_FONTS) {
caddr_t fbbase = ioremap(state->membase, state->memsize);
if (!fbbase) {
vga_cleanup(state);
return 1;
}
restore_vga_text(state, fbbase);
iounmap(fbbase);
}
if (state->flags & VGA_SAVE_CMAP)
restore_vga_cmap(state);
vga_cleanup(state);
return 0;
}
int save_vga(struct vgastate *state)
{
struct regstate *saved;
saved = kmalloc(sizeof(struct regstate), GFP_KERNEL);
if (saved == NULL)
return 1;
memset (saved, 0, sizeof(struct regstate));
state->vidstate = (void *)saved;
if (state->flags & VGA_SAVE_CMAP) {
saved->vga_cmap = vmalloc(768);
if (!saved->vga_cmap) {
vga_cleanup(state);
return 1;
}
save_vga_cmap(state);
}
if (state->flags & VGA_SAVE_MODE) {
int total;
if (state->num_attr < 21)
state->num_attr = 21;
if (state->num_crtc < 25)
state->num_crtc = 25;
if (state->num_gfx < 9)
state->num_gfx = 9;
if (state->num_seq < 5)
state->num_seq = 5;
total = state->num_attr + state->num_crtc +
state->num_gfx + state->num_seq;
saved->attr = vmalloc(total);
if (!saved->attr) {
vga_cleanup(state);
return 1;
}
saved->crtc = saved->attr + state->num_attr;
saved->gfx = saved->crtc + state->num_crtc;
saved->seq = saved->gfx + state->num_gfx;
save_vga_mode(state);
}
if (state->flags & VGA_SAVE_FONTS) {
caddr_t fbbase;
/* exit if window is less than 32K */
if (state->memsize && state->memsize < 4 * 8192) {
vga_cleanup(state);
return 1;
}
if (!state->memsize)
state->memsize = 8 * 8192;
if (!state->membase)
state->membase = 0xA0000;
fbbase = ioremap(state->membase, state->memsize);
if (!fbbase) {
vga_cleanup(state);
return 1;
}
/*
* save only first 32K used by vgacon
*/
if (state->flags & VGA_SAVE_FONT0) {
saved->vga_font0 = vmalloc(4 * 8192);
if (!saved->vga_font0) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
/*
* largely unused, but if required by the caller
* we'll just save everything.
*/
if (state->flags & VGA_SAVE_FONT1) {
saved->vga_font1 = vmalloc(state->memsize);
if (!saved->vga_font1) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
/*
* Save 8K at plane0[0], and 8K at plane1[16K]
*/
if (state->flags & VGA_SAVE_TEXT) {
saved->vga_text = vmalloc(8192 * 2);
if (!saved->vga_text) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
save_vga_text(state, fbbase);
iounmap(fbbase);
}
return 0;
}
int save_vga(struct vgastate *state)
{
struct regstate *saved;
saved = kzalloc(sizeof(struct regstate), GFP_KERNEL);
if (saved == NULL)
return 1;
state->vidstate = (void *)saved;
if (state->flags & VGA_SAVE_CMAP) {
saved->vga_cmap = vmalloc(768);
if (!saved->vga_cmap) {
vga_cleanup(state);
return 1;
}
save_vga_cmap(state);
}
if (state->flags & VGA_SAVE_MODE) {
int total;
if (state->num_attr < 21)
state->num_attr = 21;
if (state->num_crtc < 25)
state->num_crtc = 25;
if (state->num_gfx < 9)
state->num_gfx = 9;
if (state->num_seq < 5)
state->num_seq = 5;
total = state->num_attr + state->num_crtc +
state->num_gfx + state->num_seq;
saved->attr = vmalloc(total);
if (!saved->attr) {
vga_cleanup(state);
return 1;
}
saved->crtc = saved->attr + state->num_attr;
saved->gfx = saved->crtc + state->num_crtc;
saved->seq = saved->gfx + state->num_gfx;
save_vga_mode(state);
}
if (state->flags & VGA_SAVE_FONTS) {
void __iomem *fbbase;
if (state->memsize && state->memsize < 4 * 8192) {
vga_cleanup(state);
return 1;
}
if (!state->memsize)
state->memsize = 8 * 8192;
if (!state->membase)
state->membase = 0xA0000;
fbbase = ioremap(state->membase, state->memsize);
if (!fbbase) {
vga_cleanup(state);
return 1;
}
if (state->flags & VGA_SAVE_FONT0) {
saved->vga_font0 = vmalloc(4 * 8192);
if (!saved->vga_font0) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
if (state->flags & VGA_SAVE_FONT1) {
saved->vga_font1 = vmalloc(state->memsize);
if (!saved->vga_font1) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
if (state->flags & VGA_SAVE_TEXT) {
saved->vga_text = vmalloc(8192 * 2);
if (!saved->vga_text) {
iounmap(fbbase);
vga_cleanup(state);
return 1;
}
}
save_vga_text(state, fbbase);
iounmap(fbbase);
}
return 0;
}