diff options
Diffstat (limited to 'contrib/syslinux/latest/com32/lib/sys/vesa/initvesa.c')
-rw-r--r-- | contrib/syslinux/latest/com32/lib/sys/vesa/initvesa.c | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/contrib/syslinux/latest/com32/lib/sys/vesa/initvesa.c b/contrib/syslinux/latest/com32/lib/sys/vesa/initvesa.c deleted file mode 100644 index 9a1ae38..0000000 --- a/contrib/syslinux/latest/com32/lib/sys/vesa/initvesa.c +++ /dev/null @@ -1,357 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 1999-2008 H. Peter Anvin - All Rights Reserved - * - * 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 <sys/fpu.h> -#include <syslinux/video.h> -#include "vesa.h" -#include "video.h" -#include "fill.h" -#include "debug.h" - -struct vesa_info __vesa_info; - -struct vesa_char *__vesacon_text_display; - -int __vesacon_font_height; -int __vesacon_text_rows; -int __vesacon_text_cols; -enum vesa_pixel_format __vesacon_pixel_format = PXF_NONE; -unsigned int __vesacon_bytes_per_pixel; -uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT]; - -uint32_t *__vesacon_background, *__vesacon_shadowfb; - -static void unpack_font(uint8_t * dst, uint8_t * src, int height) -{ - int i; - - for (i = 0; i < FONT_MAX_CHARS; i++) { - memcpy(dst, src, height); - memset(dst + height, 0, FONT_MAX_HEIGHT - height); - - dst += FONT_MAX_HEIGHT; - src += height; - } -} - -static int __constfunc is_power_of_2(unsigned int x) -{ - return x && !(x & (x - 1)); -} - -static int vesacon_paged_mode_ok(const struct vesa_mode_info *mi) -{ - int i; - - if (!is_power_of_2(mi->win_size) || - !is_power_of_2(mi->win_grain) || mi->win_grain > mi->win_size) - return 0; /* Impossible... */ - - for (i = 0; i < 2; i++) { - if ((mi->win_attr[i] & 0x05) == 0x05 && mi->win_seg[i]) - return 1; /* Usable window */ - } - - return 0; /* Nope... */ -} - -static int vesacon_set_mode(int x, int y) -{ - com32sys_t rm; - uint8_t *rom_font; - uint16_t mode, bestmode, *mode_ptr; - struct vesa_info *vi; - struct vesa_general_info *gi; - struct vesa_mode_info *mi; - enum vesa_pixel_format pxf, bestpxf; - int err = 0; - - debug("Hello, World!\r\n"); - - /* Free any existing data structures */ - if (__vesacon_background) { - free(__vesacon_background); - __vesacon_background = NULL; - } - if (__vesacon_shadowfb) { - free(__vesacon_shadowfb); - __vesacon_shadowfb = NULL; - } - - /* Allocate space in the bounce buffer for these structures */ - vi = lzalloc(sizeof *vi); - if (!vi) { - err = 10; /* Out of memory */ - goto exit; - } - gi = &vi->gi; - mi = &vi->mi; - - memset(&rm, 0, sizeof rm); - - 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) { - err = 1; /* Function call failed */ - goto exit; - } - if (gi->signature != VESA_MAGIC) { - err = 2; /* No magic */ - goto exit; - } - if (gi->version < 0x0102) { - err = 3; /* VESA 1.2+ required */ - goto exit; - } - - /* Copy general info */ - memcpy(&__vesa_info.gi, gi, sizeof *gi); - - /* Search for the proper mode with a suitable color and memory model... */ - - mode_ptr = GET_PTR(gi->video_mode_ptr); - bestmode = 0; - bestpxf = PXF_NONE; - - while ((mode = *mode_ptr++) != 0xFFFF) { - mode &= 0x1FF; /* The rest are attributes of sorts */ - - debug("Found mode: 0x%04x\r\n", mode); - - 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; - - debug - ("mode_attr 0x%04x, h_res = %4d, v_res = %4d, bpp = %2d, layout = %d (%d,%d,%d)\r\n", - mi->mode_attr, mi->h_res, mi->v_res, mi->bpp, mi->memory_layout, - mi->rpos, mi->gpos, mi->bpos); - - /* Must be an LFB color graphics mode supported by the hardware. - - The bits tested are: - 4 - graphics mode - 3 - color mode - 1 - mode information available (mandatory in VBE 1.2+) - 0 - mode supported by hardware - */ - if ((mi->mode_attr & 0x001b) != 0x001b) - continue; - - /* Must be the chosen size */ - if (mi->h_res != x || mi->v_res != y) - 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) { - debug("bad: banks = %d, banksize = %d, pages = %d\r\n", - mi->banks, mi->bank_size, mi->image_pages); - continue; - } - - /* Must be either a flat-framebuffer mode, or be an acceptable - paged mode */ - if (!(mi->mode_attr & 0x0080) && !vesacon_paged_mode_ok(mi)) { - debug("bad: invalid paged mode\r\n"); - continue; - } - - /* Must either be a packed-pixel mode or a direct color mode - (depending on VESA version ); must be a supported pixel format */ - pxf = PXF_NONE; /* Not usable */ - - if (mi->bpp == 32 && - (mi->memory_layout == 4 || - (mi->memory_layout == 6 && mi->rpos == 16 && mi->gpos == 8 && - mi->bpos == 0))) - pxf = PXF_BGRA32; - else if (mi->bpp == 24 && - (mi->memory_layout == 4 || - (mi->memory_layout == 6 && mi->rpos == 16 && mi->gpos == 8 && - mi->bpos == 0))) - pxf = PXF_BGR24; - else if (mi->bpp == 16 && - (mi->memory_layout == 4 || - (mi->memory_layout == 6 && mi->rpos == 11 && mi->gpos == 5 && - mi->bpos == 0))) - pxf = PXF_LE_RGB16_565; - else if (mi->bpp == 15 && - (mi->memory_layout == 4 || - (mi->memory_layout == 6 && mi->rpos == 10 && mi->gpos == 5 && - mi->bpos == 0))) - pxf = PXF_LE_RGB15_555; - - if (pxf < bestpxf) { - debug("Best mode so far, pxf = %d\r\n", pxf); - - /* Best mode so far... */ - bestmode = mode; - bestpxf = pxf; - - /* Copy mode info */ - memcpy(&__vesa_info.mi, mi, sizeof *mi); - } - } - - if (bestpxf == PXF_NONE) { - err = 4; /* No mode found */ - goto exit; - } - - mi = &__vesa_info.mi; - mode = bestmode; - __vesacon_bytes_per_pixel = (mi->bpp + 7) >> 3; - __vesacon_format_pixels = __vesacon_format_pixels_list[bestpxf]; - - /* Download the SYSLINUX- or BIOS-provided font */ - __vesacon_font_height = syslinux_font_query(&rom_font); - if (!__vesacon_font_height) { - /* Get BIOS 8x16 font */ - - rm.eax.w[0] = 0x1130; /* Get Font Information */ - rm.ebx.w[0] = 0x0600; /* Get 8x16 ROM font */ - __intcall(0x10, &rm, &rm); - rom_font = MK_PTR(rm.es, rm.ebp.w[0]); - __vesacon_font_height = 16; - } - unpack_font((uint8_t *) __vesacon_graphics_font, rom_font, - __vesacon_font_height); - - /* Now set video mode */ - rm.eax.w[0] = 0x4F02; /* Set SVGA video mode */ - if (mi->mode_attr & 0x0080) - mode |= 0x4000; /* Request linear framebuffer if supported */ - rm.ebx.w[0] = mode; - __intcall(0x10, &rm, &rm); - if (rm.eax.w[0] != 0x004F) { - err = 9; /* Failed to set mode */ - goto exit; - } - - __vesacon_background = calloc(mi->h_res*mi->v_res, 4); - __vesacon_shadowfb = calloc(mi->h_res*mi->v_res, 4); - - __vesacon_init_copy_to_screen(); - - /* Tell syslinux we changed video mode */ - /* In theory this should be: - - flags = (mi->mode_attr & 4) ? 0x0007 : 0x000f; - - However, that would assume all systems that claim to handle text - output in VESA modes actually do that... */ - syslinux_report_video_mode(0x000f, mi->h_res, mi->v_res); - - __vesacon_pixel_format = bestpxf; - -exit: - if (vi) - lfree(vi); - - return err; -} - -static int init_text_display(void) -{ - size_t nchars; - struct vesa_char *ptr; - struct vesa_char def_char = { - .ch = ' ', - .attr = 0, - }; - - if (__vesacon_text_display) - free(__vesacon_text_display); - - __vesacon_text_cols = TEXT_PIXEL_COLS / FONT_WIDTH; - __vesacon_text_rows = TEXT_PIXEL_ROWS / __vesacon_font_height; - nchars = (__vesacon_text_cols+2) * (__vesacon_text_rows+2); - - __vesacon_text_display = ptr = malloc(nchars * sizeof(struct vesa_char)); - - if (!ptr) - return -1; - - vesacon_fill(ptr, def_char, nchars); - __vesacon_init_cursor(__vesacon_font_height); - - return 0; -} - -int __vesacon_init(int x, int y) -{ - int rv; - - /* We need the FPU for graphics, at least libpng et al will need it... */ - if (x86_init_fpu()) - return 10; - - rv = vesacon_set_mode(x, y); - if (rv) { - /* Try to see if we can just patch the BIOS... */ - if (__vesacon_i915resolution(x, y)) - return rv; - if (vesacon_set_mode(x, y)) - return rv; - } - - init_text_display(); - - debug("Mode set, now drawing at %#p\r\n", __vesa_info.mi.lfb_ptr); - - __vesacon_init_background(); - - debug("Ready!\r\n"); - return 0; -} |