/* The flags for the Multiboot header. */
#ifdef __ELF__
-# define MULTIBOOT_HEADER_FLAGS 0x00000003
+# define MULTIBOOT_HEADER_FLAGS 0x00000007
#else
-# define MULTIBOOT_HEADER_FLAGS 0x00010003
+# define MULTIBOOT_HEADER_FLAGS 0x00010007
#endif
.text
.long _end
/* entry_addr */
.long multiboot_entry
-#endif /* ! __ELF__ */
+#else /* ! __ELF__ */
+ .long 0
+ .long 0
+ .long 0
+ .long 0
+ .long 0
+#endif /* __ELF__ */
+ .long 0
+ .long 1024
+ .long 768
+ .long 32
multiboot_entry:
/* Initialize the stack pointer. */
mmap->len & 0xffffffff,
(unsigned) mmap->type);
}
+
+ /* Draw diagonal blue line. */
+ if (CHECK_FLAG (mbi->flags, 12))
+ {
+ multiboot_uint32_t color;
+ unsigned i;
+ void *fb = (void *) (unsigned long) mbi->framebuffer_addr;
+
+ switch (mbi->framebuffer_type)
+ {
+ case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
+ {
+ unsigned best_distance, distance;
+ struct multiboot_color *palette;
+
+ palette = (struct multiboot_color *) mbi->framebuffer_palette_addr;
+
+ color = 0;
+ best_distance = 4*256*256;
+
+ for (i = 0; i < mbi->framebuffer_palette_num_colors; i++)
+ {
+ distance = (0xff - palette[i].blue) * (0xff - palette[i].blue)
+ + palette[i].red * palette[i].red
+ + palette[i].green * palette[i].green;
+ if (distance < best_distance)
+ {
+ color = i;
+ best_distance = distance;
+ }
+ }
+ }
+ break;
+
+ case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
+ color = ((1 << mbi->framebuffer_blue_mask_size) - 1)
+ << mbi->framebuffer_blue_field_position;
+ break;
+
+ default:
+ color = 0xffffffff;
+ break;
+ }
+ for (i = 0; i < mbi->framebuffer_width
+ && i < mbi->framebuffer_height; i++)
+ {
+ switch (mbi->framebuffer_bpp)
+ {
+ case 8:
+ {
+ multiboot_uint8_t *pixel = fb + mbi->framebuffer_pitch * i + i;
+ *pixel = color;
+ }
+ break;
+ case 15:
+ case 16:
+ {
+ multiboot_uint16_t *pixel
+ = fb + mbi->framebuffer_pitch * i + 2 * i;
+ *pixel = color;
+ }
+ break;
+ case 24:
+ {
+ multiboot_uint32_t *pixel
+ = fb + mbi->framebuffer_pitch * i + 3 * i;
+ *pixel = (color & 0xffffff) | (*pixel & 0xff000000);
+ }
+ break;
+
+ case 32:
+ {
+ multiboot_uint32_t *pixel
+ = fb + mbi->framebuffer_pitch * i + 4 * i;
+ *pixel = color;
+ }
+ break;
+ }
+ }
+ }
+
}
/* Clear the screen and initialize VIDEO, XPOS and YPOS. */
#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
/* The bits in the required part of flags field we don't support. */
-#define MULTIBOOT_UNSUPPORTED 0x0000fffc
+#define MULTIBOOT_UNSUPPORTED 0x0000fff8
/* Alignment of multiboot modules. */
#define MULTIBOOT_MOD_ALIGN 0x00001000
#define MULTIBOOT_INFO_APM_TABLE 0x00000400
/* Is there video information? */
-#define MULTIBOOT_INFO_VIDEO_INFO 0x00000800
+#define MULTIBOOT_INFO_VBE_INFO 0x00000800
+#define MULTIBOOT_INFO_FRAMEBUFFER_INFO 0x00001000
#ifndef ASM_FILE
+typedef unsigned char multiboot_uint8_t;
typedef unsigned short multiboot_uint16_t;
typedef unsigned int multiboot_uint32_t;
typedef unsigned long long multiboot_uint64_t;
multiboot_uint16_t vbe_interface_seg;
multiboot_uint16_t vbe_interface_off;
multiboot_uint16_t vbe_interface_len;
+
+ multiboot_uint64_t framebuffer_addr;
+ multiboot_uint32_t framebuffer_pitch;
+ multiboot_uint32_t framebuffer_width;
+ multiboot_uint32_t framebuffer_height;
+ multiboot_uint8_t framebuffer_bpp;
+ multiboot_uint8_t framebuffer_type;
+ union
+ {
+ struct
+ {
+ multiboot_uint32_t framebuffer_palette_addr;
+ multiboot_uint16_t framebuffer_palette_num_colors;
+ };
+ struct
+ {
+ multiboot_uint8_t framebuffer_red_field_position;
+ multiboot_uint8_t framebuffer_red_mask_size;
+ multiboot_uint8_t framebuffer_green_field_position;
+ multiboot_uint8_t framebuffer_green_mask_size;
+ multiboot_uint8_t framebuffer_blue_field_position;
+ multiboot_uint8_t framebuffer_blue_mask_size;
+ };
+ };
+};
+
+struct multiboot_color
+{
+ multiboot_uint8_t red;
+ multiboot_uint8_t green;
+ multiboot_uint8_t blue;
};
typedef struct multiboot_info multiboot_info_t;
+#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
+
struct multiboot_mmap_entry
{
multiboot_uint32_t size;
84 | vbe_interface_off |
86 | vbe_interface_len |
+-------------------+
+88 | framebuffer_addr | (present if flags[12] is set)
+96 | framebuffer_pitch |
+100 | framebuffer_width |
+104 | framebuffer_height|
+108 | framebuffer_bpp |
+109 | framebuffer_type |
+110-115 | color_info |
+ +-------------------+
+
@end group
@end example
@uref{http://www.microsoft.com/hwdev/busbios/amp_12.htm, Advanced Power
Management (APM) BIOS Interface Specification}, for more information.
-If bit 11 in the @samp{flags} is set, the graphics table is available.
+If bit 11 in the @samp{flags} is set, the @sc{vbe} table is available.
The fields @samp{vbe_control_info} and @samp{vbe_mode_info} contain
the physical addresses of @sc{vbe} control information returned by the
@sc{vbe} Function 00h and @sc{vbe} mode information returned by the
-@sc{vbe} Function 01h, respectively. In case of non-@sc{vbe} video driver
-@samp{vbe_control_info} contains zero and @samp{vbe_mode_info} points to the
-following 256-byte structure:
-
-@example
-@group
- +----------------------+
-0 | flags |
-2 | zeros |
-16 | pitch |
-18 | width |
-20 | height |
-22 | zeros |
-25 | bits per pixel |
-26 | zeros |
-27 | memory model |
-28 | zeros |
-31 | red mask size |
-32 | red field position |
-33 | green mask size |
-34 | green field position |
-35 | blue mask size |
-36 | blue field position |
-37 | alpha mask size |
-38 | alpha field position |
-39 | zero |
-40 | framebuffer address |
-44 | zero |
-50 | pitch |
-52 | zero |
-54 | red mask size |
-55 | red field position |
-56 | green mask size |
-57 | green field position |
-58 | blue mask size |
-59 | blue field position |
-60 | alpha mask size |
-61 | alpha field position |
-62 | zeros |
- +----------------------+
-@end group
-@end example
-
-All fields have the same meaning as the corresponding VBE mode info
-structure except fields marked as zeros which are zero-filled.
-
-If video is a linear framebuffer boot loader has to ensure that
-displayed region starts at offset @samp{0} of linear framebuffer.
+@sc{vbe} Function 01h, respectively.
The field @samp{vbe_mode} indicates current video mode in the format
-specified in @sc{vbe} 3.0. In case of non-@sc{vbe} video driver
-@samp{vbe_mode} contains 0xffff.
+specified in @sc{vbe} 3.0.
The rest fields @samp{vbe_interface_seg}, @samp{vbe_interface_off}, and
@samp{vbe_interface_len} contain the table of a protected mode interface
Multiboot boot loaders may simulate @sc{vbe} on non-@sc{vbe} modes, as
if they were @sc{vbe} modes.
+If bit 12 in the @samp{flags} is set, the @sc{Framebuffer} table is available.
+
+The field @samp{framebuffer_addr} contains framebuffer physical address. This field is 64-bit wide but bootloader @dfn{should} set it under 4GiB if possible for compatibility with payloads which aren't aware of PAE or amd64. The field @samp{framebuffer_pitch} contains pitch in bytes. The fields @samp{framebuffer_width}, @samp{framebuffer_height} contain framebuffer dimensions in pixels. The field @samp{framebuffer_bpp} contains number of bits per pixel. If @samp{framebuffer_type} is set to 0 it means indexed color. In this case color_info is defined as following:
+@example
+@group
+ +----------------------------------+
+110 | framebuffer_palette_addr |
+114 | framebuffer_palette_num_colors |
+ +----------------------------------+
+@end group
+@end example
+@samp{framebuffer_palette_addr} contains address of array of @samp{framebuffer_palette_num_colors} following structures:
+@example
+@group
+ +-------------+
+0 | red_value |
+1 | green_value |
+2 | blue_value |
+ +-------------+
+@end group
+@end example
+If @samp{framebuffer_type} is set to 1 it direct RGB color. Then color_type is defined as following:
+
+@example
+@group
+ +----------------------------------+
+110 | framebuffer_red_field_position |
+111 | framebuffer_red_mask_size |
+112 | framebuffer_green_field_position |
+113 | framebuffer_green_mask_size |
+114 | framebuffer_blue_field_position |
+115 | framebuffer_blue_mask_size |
+ +----------------------------------+
+@end group
+@end example
+All further values of @samp{framebuffer_type} are reserved for future expansion
@node Examples
@chapter Examples
projects / thirdparty / grub.git / commitdiff
