mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 11:46:40 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
505 lines
14 KiB
C
505 lines
14 KiB
C
/*
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* linux/drivers/video/vgastate.c -- VGA state save/restore
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*
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* Copyright 2002 James Simmons
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*
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* Copyright history from vga16fb.c:
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* Copyright 1999 Ben Pfaff and Petr Vandrovec
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* Based on VGA info at http://www.goodnet.com/~tinara/FreeVGA/home.htm
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* Based on VESA framebuffer (c) 1998 Gerd Knorr
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/fb.h>
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#include <linux/vmalloc.h>
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#include <video/vga.h>
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struct regstate {
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__u8 *vga_font0;
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__u8 *vga_font1;
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__u8 *vga_text;
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__u8 *vga_cmap;
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__u8 *attr;
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__u8 *crtc;
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__u8 *gfx;
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__u8 *seq;
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__u8 misc;
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};
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static inline unsigned char vga_rcrtcs(void __iomem *regbase, unsigned short iobase,
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unsigned char reg)
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{
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vga_w(regbase, iobase + 0x4, reg);
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return vga_r(regbase, iobase + 0x5);
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}
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static inline void vga_wcrtcs(void __iomem *regbase, unsigned short iobase,
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unsigned char reg, unsigned char val)
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{
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vga_w(regbase, iobase + 0x4, reg);
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vga_w(regbase, iobase + 0x5, val);
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}
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static void save_vga_text(struct vgastate *state, void __iomem *fbbase)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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int i;
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u8 misc, attr10, gr4, gr5, gr6, seq1, seq2, seq4;
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/* if in graphics mode, no need to save */
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attr10 = vga_rattr(state->vgabase, 0x10);
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if (attr10 & 1)
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return;
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/* save regs */
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misc = vga_r(state->vgabase, VGA_MIS_R);
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gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ);
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gr5 = vga_rgfx(state->vgabase, VGA_GFX_MODE);
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gr6 = vga_rgfx(state->vgabase, VGA_GFX_MISC);
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seq2 = vga_rseq(state->vgabase, VGA_SEQ_PLANE_WRITE);
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seq4 = vga_rseq(state->vgabase, VGA_SEQ_MEMORY_MODE);
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/* force graphics mode */
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vga_w(state->vgabase, VGA_MIS_W, misc | 1);
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/* blank screen */
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seq1 = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE);
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 | 1 << 5);
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3);
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/* save font at plane 2 */
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if (state->flags & VGA_SAVE_FONT0) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x4);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 4 * 8192; i++)
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saved->vga_font0[i] = vga_r(fbbase, i);
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}
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/* save font at plane 3 */
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if (state->flags & VGA_SAVE_FONT1) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x8);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < state->memsize; i++)
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saved->vga_font1[i] = vga_r(fbbase, i);
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}
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/* save font at plane 0/1 */
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if (state->flags & VGA_SAVE_TEXT) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 8192; i++)
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saved->vga_text[i] = vga_r(fbbase, i);
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x2);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 8192; i++)
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saved->vga_text[8192+i] = vga_r(fbbase + 2 * 8192, i);
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}
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/* restore regs */
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vga_wattr(state->vgabase, 0x10, attr10);
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, seq2);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, seq4);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, gr5);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, gr6);
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vga_w(state->vgabase, VGA_MIS_W, misc);
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/* unblank screen */
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 & ~(1 << 5));
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1);
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}
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static void restore_vga_text(struct vgastate *state, void __iomem *fbbase)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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int i;
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u8 misc, gr1, gr3, gr4, gr5, gr6, gr8;
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u8 seq1, seq2, seq4;
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/* save regs */
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misc = vga_r(state->vgabase, VGA_MIS_R);
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gr1 = vga_rgfx(state->vgabase, VGA_GFX_SR_ENABLE);
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gr3 = vga_rgfx(state->vgabase, VGA_GFX_DATA_ROTATE);
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gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ);
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gr5 = vga_rgfx(state->vgabase, VGA_GFX_MODE);
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gr6 = vga_rgfx(state->vgabase, VGA_GFX_MISC);
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gr8 = vga_rgfx(state->vgabase, VGA_GFX_BIT_MASK);
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seq2 = vga_rseq(state->vgabase, VGA_SEQ_PLANE_WRITE);
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seq4 = vga_rseq(state->vgabase, VGA_SEQ_MEMORY_MODE);
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/* force graphics mode */
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vga_w(state->vgabase, VGA_MIS_W, misc | 1);
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/* blank screen */
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seq1 = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE);
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 | 1 << 5);
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3);
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if (state->depth == 4) {
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vga_wgfx(state->vgabase, VGA_GFX_DATA_ROTATE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, 0xff);
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vga_wgfx(state->vgabase, VGA_GFX_SR_ENABLE, 0x00);
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}
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/* restore font at plane 2 */
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if (state->flags & VGA_SAVE_FONT0) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x4);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 4 * 8192; i++)
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vga_w(fbbase, i, saved->vga_font0[i]);
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}
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/* restore font at plane 3 */
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if (state->flags & VGA_SAVE_FONT1) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x8);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < state->memsize; i++)
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vga_w(fbbase, i, saved->vga_font1[i]);
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}
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/* restore font at plane 0/1 */
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if (state->flags & VGA_SAVE_TEXT) {
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 8192; i++)
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vga_w(fbbase, i, saved->vga_text[i]);
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x2);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5);
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for (i = 0; i < 8192; i++)
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vga_w(fbbase, i, saved->vga_text[8192+i]);
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}
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/* unblank screen */
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 & ~(1 << 5));
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3);
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/* restore regs */
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vga_w(state->vgabase, VGA_MIS_W, misc);
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vga_wgfx(state->vgabase, VGA_GFX_SR_ENABLE, gr1);
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vga_wgfx(state->vgabase, VGA_GFX_DATA_ROTATE, gr3);
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vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4);
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vga_wgfx(state->vgabase, VGA_GFX_MODE, gr5);
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vga_wgfx(state->vgabase, VGA_GFX_MISC, gr6);
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vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, gr8);
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1);
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vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, seq2);
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vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, seq4);
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}
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static void save_vga_mode(struct vgastate *state)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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unsigned short iobase;
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int i;
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saved->misc = vga_r(state->vgabase, VGA_MIS_R);
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if (saved->misc & 1)
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iobase = 0x3d0;
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else
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iobase = 0x3b0;
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for (i = 0; i < state->num_crtc; i++)
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saved->crtc[i] = vga_rcrtcs(state->vgabase, iobase, i);
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vga_r(state->vgabase, iobase + 0xa);
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vga_w(state->vgabase, VGA_ATT_W, 0x00);
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for (i = 0; i < state->num_attr; i++) {
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vga_r(state->vgabase, iobase + 0xa);
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saved->attr[i] = vga_rattr(state->vgabase, i);
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}
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vga_r(state->vgabase, iobase + 0xa);
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vga_w(state->vgabase, VGA_ATT_W, 0x20);
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for (i = 0; i < state->num_gfx; i++)
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saved->gfx[i] = vga_rgfx(state->vgabase, i);
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for (i = 0; i < state->num_seq; i++)
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saved->seq[i] = vga_rseq(state->vgabase, i);
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}
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static void restore_vga_mode(struct vgastate *state)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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unsigned short iobase;
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int i;
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vga_w(state->vgabase, VGA_MIS_W, saved->misc);
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if (saved->misc & 1)
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iobase = 0x3d0;
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else
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iobase = 0x3b0;
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/* turn off display */
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE,
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saved->seq[VGA_SEQ_CLOCK_MODE] | 0x20);
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/* disable sequencer */
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01);
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/* enable palette addressing */
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vga_r(state->vgabase, iobase + 0xa);
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vga_w(state->vgabase, VGA_ATT_W, 0x00);
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for (i = 2; i < state->num_seq; i++)
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vga_wseq(state->vgabase, i, saved->seq[i]);
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/* unprotect vga regs */
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vga_wcrtcs(state->vgabase, iobase, 17, saved->crtc[17] & ~0x80);
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for (i = 0; i < state->num_crtc; i++)
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vga_wcrtcs(state->vgabase, iobase, i, saved->crtc[i]);
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for (i = 0; i < state->num_gfx; i++)
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vga_wgfx(state->vgabase, i, saved->gfx[i]);
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for (i = 0; i < state->num_attr; i++) {
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vga_r(state->vgabase, iobase + 0xa);
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vga_wattr(state->vgabase, i, saved->attr[i]);
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}
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/* reenable sequencer */
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vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03);
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/* turn display on */
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vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE,
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saved->seq[VGA_SEQ_CLOCK_MODE] & ~(1 << 5));
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/* disable video/palette source */
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vga_r(state->vgabase, iobase + 0xa);
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vga_w(state->vgabase, VGA_ATT_W, 0x20);
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}
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static void save_vga_cmap(struct vgastate *state)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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int i;
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vga_w(state->vgabase, VGA_PEL_MSK, 0xff);
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/* assumes DAC is readable and writable */
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vga_w(state->vgabase, VGA_PEL_IR, 0x00);
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for (i = 0; i < 768; i++)
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saved->vga_cmap[i] = vga_r(state->vgabase, VGA_PEL_D);
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}
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static void restore_vga_cmap(struct vgastate *state)
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{
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struct regstate *saved = (struct regstate *) state->vidstate;
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int i;
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vga_w(state->vgabase, VGA_PEL_MSK, 0xff);
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/* assumes DAC is readable and writable */
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vga_w(state->vgabase, VGA_PEL_IW, 0x00);
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for (i = 0; i < 768; i++)
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vga_w(state->vgabase, VGA_PEL_D, saved->vga_cmap[i]);
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}
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static void vga_cleanup(struct vgastate *state)
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{
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if (state->vidstate != NULL) {
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struct regstate *saved = (struct regstate *) state->vidstate;
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if (saved->vga_font0)
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vfree(saved->vga_font0);
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if (saved->vga_font1)
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vfree(saved->vga_font1);
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if (saved->vga_text)
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vfree(saved->vga_text);
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if (saved->vga_cmap)
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vfree(saved->vga_cmap);
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if (saved->attr)
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vfree(saved->attr);
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kfree(saved);
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state->vidstate = NULL;
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}
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}
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int save_vga(struct vgastate *state)
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{
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struct regstate *saved;
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saved = kmalloc(sizeof(struct regstate), GFP_KERNEL);
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if (saved == NULL)
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return 1;
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memset (saved, 0, sizeof(struct regstate));
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state->vidstate = (void *)saved;
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if (state->flags & VGA_SAVE_CMAP) {
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saved->vga_cmap = vmalloc(768);
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if (!saved->vga_cmap) {
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vga_cleanup(state);
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return 1;
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}
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save_vga_cmap(state);
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}
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if (state->flags & VGA_SAVE_MODE) {
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int total;
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if (state->num_attr < 21)
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state->num_attr = 21;
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if (state->num_crtc < 25)
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state->num_crtc = 25;
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if (state->num_gfx < 9)
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state->num_gfx = 9;
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if (state->num_seq < 5)
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state->num_seq = 5;
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total = state->num_attr + state->num_crtc +
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state->num_gfx + state->num_seq;
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saved->attr = vmalloc(total);
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if (!saved->attr) {
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vga_cleanup(state);
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return 1;
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}
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saved->crtc = saved->attr + state->num_attr;
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saved->gfx = saved->crtc + state->num_crtc;
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saved->seq = saved->gfx + state->num_gfx;
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save_vga_mode(state);
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}
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|
if (state->flags & VGA_SAVE_FONTS) {
|
|
void __iomem *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 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) {
|
|
void __iomem *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;
|
|
}
|
|
|
|
#ifdef MODULE
|
|
int init_module(void) { return 0; };
|
|
void cleanup_module(void) {};
|
|
#endif
|
|
|
|
EXPORT_SYMBOL(save_vga);
|
|
EXPORT_SYMBOL(restore_vga);
|
|
|
|
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
|
|
MODULE_DESCRIPTION("VGA State Save/Restore");
|
|
MODULE_LICENSE("GPL");
|
|
|