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-rw-r--r--contrib/syslinux/latest/com32/mboot/initvesa.c226
1 files changed, 0 insertions, 226 deletions
diff --git a/contrib/syslinux/latest/com32/mboot/initvesa.c b/contrib/syslinux/latest/com32/mboot/initvesa.c
deleted file mode 100644
index cf2707d..0000000
--- a/contrib/syslinux/latest/com32/mboot/initvesa.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/* ----------------------------------------------------------------------- *
- *
- * Copyright 1999-2008 H. Peter Anvin - All Rights Reserved
- * Copyright 2009 Intel Corporation; author: H. Peter Anvin
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall
- * be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * initvesa.c
- *
- * Query the VESA BIOS and select a 640x480x32 mode with local mapping
- * support, if one exists.
- */
-
-#include <inttypes.h>
-#include <com32.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-
-#include "vesa.h"
-#include "mboot.h"
-
-struct vesa_info vesa_info;
-
-void set_graphics_mode(const struct multiboot_header *mbh,
- struct multiboot_info *mbi)
-{
- com32sys_t rm;
- uint16_t mode, bestmode, *mode_ptr;
- struct vesa_general_info *gi;
- struct vesa_mode_info *mi;
- int pxf, bestpxf;
- int wantx, wanty;
- int err, besterr;
- bool better;
- addr_t viaddr;
-
- /* Only do this if requested by the OS image */
- if (!(mbh->flags & MULTIBOOT_VIDEO_MODE) || mbh->mode_type != 0)
- return;
-
- /* Allocate space in the bounce buffer for these structures */
- gi = &((struct vesa_info *)__com32.cs_bounce)->gi;
- mi = &((struct vesa_info *)__com32.cs_bounce)->mi;
-
- memset(&rm, 0, sizeof rm);
- memset(gi, 0, sizeof *gi);
-
- gi->signature = VBE2_MAGIC; /* Get VBE2 extended data */
- rm.eax.w[0] = 0x4F00; /* Get SVGA general information */
- rm.edi.w[0] = OFFS(gi);
- rm.es = SEG(gi);
- __intcall(0x10, &rm, &rm);
-
- if (rm.eax.w[0] != 0x004F)
- return; /* Function call failed */
- if (gi->signature != VESA_MAGIC)
- return; /* No magic */
- if (gi->version < 0x0102)
- return; /* VESA 1.2+ required */
-
- memcpy(&vesa_info.gi, gi, sizeof *gi);
-
- /* Search for a suitable mode with a suitable color and memory model... */
-
- mode_ptr = GET_PTR(gi->video_mode_ptr);
- bestmode = 0;
- bestpxf = 0;
- wantx = mbh->width ? mbh->width : 0xffff;
- wanty = mbh->height ? mbh->height : 0xffff;
- besterr = wantx + wanty;
-
- while ((mode = *mode_ptr++) != 0xFFFF) {
- mode &= 0x1FF; /* The rest are attributes of sorts */
-
- memset(mi, 0, sizeof *mi);
- rm.eax.w[0] = 0x4F01; /* Get SVGA mode information */
- rm.ecx.w[0] = mode;
- rm.edi.w[0] = OFFS(mi);
- rm.es = SEG(mi);
- __intcall(0x10, &rm, &rm);
-
- /* Must be a supported mode */
- if (rm.eax.w[0] != 0x004f)
- continue;
-
- /* Must be an LFB color graphics mode supported by the hardware.
-
- The bits tested are:
- 7 - linear frame buffer
- 4 - graphics mode
- 3 - color mode
- 1 - mode information available (mandatory in VBE 1.2+)
- 0 - mode supported by hardware
- */
- if ((mi->mode_attr & 0x009b) != 0x009b)
- continue;
-
- /* We don't support multibank (interlaced memory) modes */
- /*
- * Note: The Bochs VESA BIOS (vbe.c 1.58 2006/08/19) violates the
- * specification which states that banks == 1 for unbanked modes;
- * fortunately it does report bank_size == 0 for those.
- */
- if (mi->banks > 1 && mi->bank_size)
- continue;
-
- /* Must either be a packed-pixel mode or a direct color mode
- (depending on VESA version ); must be a supported pixel format */
-
- if (mi->bpp == 32 &&
- (mi->memory_layout == 4 ||
- (mi->memory_layout == 6 && mi->rpos == 16 && mi->gpos == 8 &&
- mi->bpos == 0)))
- pxf = 32;
- else if (mi->bpp == 24 &&
- (mi->memory_layout == 4 ||
- (mi->memory_layout == 6 && mi->rpos == 16 && mi->gpos == 8 &&
- mi->bpos == 0)))
- pxf = 24;
- else if (mi->bpp == 16 &&
- (mi->memory_layout == 4 ||
- (mi->memory_layout == 6 && mi->rpos == 11 && mi->gpos == 5 &&
- mi->bpos == 0)))
- pxf = 16;
- else if (mi->bpp == 15 &&
- (mi->memory_layout == 4 ||
- (mi->memory_layout == 6 && mi->rpos == 10 && mi->gpos == 5 &&
- mi->bpos == 0)))
- pxf = 15;
- else
- continue;
-
- better = false;
- err = abs(mi->h_res - wantx) + abs(mi->v_res - wanty);
-
-#define IS_GOOD(mi, bestx, besty) \
- ((mi)->h_res >= (bestx) && (mi)->v_res >= (besty))
-
- if (!bestpxf)
- better = true;
- else if (!IS_GOOD(&vesa_info.mi, wantx, wanty) &&
- IS_GOOD(mi, wantx, wanty))
- /* This matches criteria, which the previous one didn't */
- better = true;
- else if (IS_GOOD(&vesa_info.mi, wantx, wanty) &&
- !IS_GOOD(mi, wantx, wanty))
- /* This doesn't match criteria, and the previous one did */
- better = false;
- else if (err < besterr)
- better = true;
- else if (err == besterr && (pxf == (int)mbh->depth || pxf > bestpxf))
- better = true;
-
- if (better) {
- bestmode = mode;
- bestpxf = pxf;
- memcpy(&vesa_info.mi, mi, sizeof *mi);
- }
- }
-
- if (!bestpxf)
- return; /* No mode found */
-
- mi = &vesa_info.mi;
- mode = bestmode;
-
- /* Now set video mode */
- rm.eax.w[0] = 0x4F02; /* Set SVGA video mode */
- mode |= 0x4000; /* Request linear framebuffer */
- rm.ebx.w[0] = mode;
- __intcall(0x10, &rm, &rm);
- if (rm.eax.w[0] != 0x004F)
- return; /* Failed to set mode */
-
- mbi->flags |= MB_INFO_VIDEO_INFO;
- mbi->vbe_mode = mode;
- viaddr = map_data(&vesa_info, sizeof vesa_info, 4, 0);
- mbi->vbe_control_info = viaddr + offsetof(struct vesa_info, gi);
- mbi->vbe_mode_info = viaddr + offsetof(struct vesa_info, mi);
-
- /* Get the VBE 2.x PM entry point if supported */
- rm.eax.w[0] = 0x4F0A;
- rm.ebx.w[0] = 0;
- __intcall(0x10, &rm, &rm);
- if (rm.eax.w[0] == 0x004F) {
- mbi->vbe_interface_seg = rm.es;
- mbi->vbe_interface_off = rm.edi.w[0];
- mbi->vbe_interface_len = rm.ecx.w[0];
- }
-
- /* Tell syslinux we changed video mode */
- rm.eax.w[0] = 0x0017; /* Report video mode change */
- /* In theory this should be:
-
- rm.ebx.w[0] = (mi->mode_attr & 4) ? 0x0007 : 0x000f;
-
- However, that would assume all systems that claim to handle text
- output in VESA modes actually do that... */
- rm.ebx.w[0] = 0x000f;
- rm.ecx.w[0] = vesa_info.mi.h_res;
- rm.edx.w[0] = vesa_info.mi.v_res;
- __intcall(0x22, &rm, NULL);
-}
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