uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
-static void unpack_font(uint8_t *dst, uint8_t *src, int height)
+static void unpack_font(uint8_t * dst, uint8_t * src, int height)
{
- int i;
+ int i;
- for (i = 0; i < FONT_MAX_CHARS; i++) {
- memcpy(dst, src, height);
- memset(dst+height, 0, FONT_MAX_HEIGHT-height);
+ 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;
- }
+ dst += FONT_MAX_HEIGHT;
+ src += height;
+ }
}
static int __constfunc is_power_of_2(unsigned int x)
{
- return x && !(x & (x-1));
+ return x && !(x & (x - 1));
}
static int vesacon_paged_mode_ok(const struct vesa_mode_info *mi)
{
- int i;
+ 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... */
+ 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 */
- }
+ for (i = 0; i < 2; i++) {
+ if ((mi->win_attr[i] & 0x05) == 0x05 && mi->win_seg[i])
+ return 1; /* Usable window */
+ }
- return 0; /* Nope... */
+ return 0; /* Nope... */
}
static int vesacon_set_mode(void)
{
- com32sys_t rm;
- uint8_t *rom_font;
- uint16_t mode, bestmode, *mode_ptr;
- struct vesa_general_info *gi;
- struct vesa_mode_info *mi;
- enum vesa_pixel_format pxf, bestpxf;
-
- /* 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;
-
- debug("Hello, World!\r\n");
-
- 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 1; /* Function call failed */
- if ( gi->signature != VESA_MAGIC )
- return 2; /* No magic */
- if ( gi->version < 0x0102 )
- return 3; /* VESA 1.2+ required */
-
- /* Copy general info */
- memcpy(&__vesa_info.gi, gi, sizeof *gi);
-
- /* Search for a 640x480 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);
+ com32sys_t rm;
+ uint8_t *rom_font;
+ uint16_t mode, bestmode, *mode_ptr;
+ struct vesa_general_info *gi;
+ struct vesa_mode_info *mi;
+ enum vesa_pixel_format pxf, bestpxf;
+
+ /* 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;
+
+ debug("Hello, World!\r\n");
+
+ 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);
- /* 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 640x480 */
- if ( mi->h_res != VIDEO_X_SIZE || mi->v_res != VIDEO_Y_SIZE )
- 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;
+ if (rm.eax.w[0] != 0x004F)
+ return 1; /* Function call failed */
+ if (gi->signature != VESA_MAGIC)
+ return 2; /* No magic */
+ if (gi->version < 0x0102)
+ return 3; /* VESA 1.2+ required */
+
+ /* Copy general info */
+ memcpy(&__vesa_info.gi, gi, sizeof *gi);
+
+ /* Search for a 640x480 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 640x480 */
+ if (mi->h_res != VIDEO_X_SIZE || mi->v_res != VIDEO_Y_SIZE)
+ 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);
+ }
}
- /* 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)
+ return 4; /* No mode found */
+
+ 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 */
+ rm.eax.w[0] = 0x0018; /* Query custom font */
+ __intcall(0x22, &rm, &rm);
+ if (!(rm.eflags.l & EFLAGS_CF) && rm.eax.b[0]) {
+ __vesacon_font_height = rm.eax.b[0];
+ rom_font = MK_PTR(rm.es, rm.ebx.w[0]);
+ } else {
+ 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;
}
- }
-
- if (bestpxf == PXF_NONE)
- return 4; /* No mode found */
-
- 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 */
- rm.eax.w[0] = 0x0018; /* Query custom font */
- __intcall(0x22, &rm, &rm);
- if (!(rm.eflags.l & EFLAGS_CF) && rm.eax.b[0]) {
- __vesacon_font_height = rm.eax.b[0];
- rom_font = MK_PTR(rm.es, rm.ebx.w[0]);
- } else {
- rm.eax.w[0] = 0x1130; /* Get Font Information */
- rm.ebx.w[0] = 0x0600; /* Get 8x16 ROM font */
+ unpack_font((uint8_t *) __vesacon_graphics_font, rom_font,
+ __vesacon_font_height);
+ __vesacon_text_rows =
+ (VIDEO_Y_SIZE - 2 * VIDEO_BORDER) / __vesacon_font_height;
+ __vesacon_init_cursor(__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);
- 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);
- __vesacon_text_rows = (VIDEO_Y_SIZE-2*VIDEO_BORDER)/__vesacon_font_height;
- __vesacon_init_cursor(__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 )
- return 9; /* Failed to set mode */
-
- __vesacon_init_copy_to_screen();
-
- /* 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] = VIDEO_X_SIZE;
- rm.edx.w[0] = VIDEO_Y_SIZE;
- __intcall(0x22, &rm, NULL);
-
- __vesacon_pixel_format = bestpxf;
-
- return 0;
-}
+ if (rm.eax.w[0] != 0x004F)
+ return 9; /* Failed to set mode */
+
+ __vesacon_init_copy_to_screen();
+ /* 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] = VIDEO_X_SIZE;
+ rm.edx.w[0] = VIDEO_Y_SIZE;
+ __intcall(0x22, &rm, NULL);
+
+ __vesacon_pixel_format = bestpxf;
+
+ return 0;
+}
static int init_text_display(void)
{
- size_t nchars;
- struct vesa_char *ptr;
- struct vesa_char def_char = {
- .ch = ' ',
- .attr = 0,
- };
-
- nchars = (TEXT_PIXEL_ROWS/__vesacon_font_height+2)*
- (TEXT_PIXEL_COLS/FONT_WIDTH+2);
+ size_t nchars;
+ struct vesa_char *ptr;
+ struct vesa_char def_char = {
+ .ch = ' ',
+ .attr = 0,
+ };
- __vesacon_text_display = ptr = malloc(nchars*sizeof(struct vesa_char));
+ nchars = (TEXT_PIXEL_ROWS / __vesacon_font_height + 2) *
+ (TEXT_PIXEL_COLS / FONT_WIDTH + 2);
- if (!ptr)
- return -1;
+ __vesacon_text_display = ptr = malloc(nchars * sizeof(struct vesa_char));
+ if (!ptr)
+ return -1;
- vesacon_fill(ptr, def_char, nchars);
+ vesacon_fill(ptr, def_char, nchars);
- return 0;
+ return 0;
}
int __vesacon_init(void)
{
- int rv;
+ int rv;
- /* We need the FPU for graphics, at least libpng et al will need it... */
- if (x86_init_fpu())
- return 10;
+ /* We need the FPU for graphics, at least libpng et al will need it... */
+ if (x86_init_fpu())
+ return 10;
- rv = vesacon_set_mode();
- if (rv)
- return rv;
+ rv = vesacon_set_mode();
+ if (rv)
+ return rv;
- init_text_display();
+ init_text_display();
- debug("Mode set, now drawing at %#p\r\n", __vesa_info.mi.lfb_ptr);
+ debug("Mode set, now drawing at %#p\r\n", __vesa_info.mi.lfb_ptr);
- __vesacon_init_background();
+ __vesacon_init_background();
- debug("Ready!\r\n");
- return 0;
+ debug("Ready!\r\n");
+ return 0;
}
projects / platform / upstream / syslinux.git / commitdiff