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Support multiboot VBE info.

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* grub-core/loader/i386/multiboot_mbi.c (grub_multiboot_get_mbi_size):
	Take VBE info into account.
	(fill_vbe_info) [GRUB_MACHINE_HAS_VBE]: New function.
	(retrieve_video_parameters) [GRUB_MACHINE_HAS_VBE]:
	Call fill_vbe_info when appropriate.
	(grub_multiboot_make_mbi): Account for the size occupied by VBE info.
	* grub-core/loader/multiboot_mbi2.c (grub_multiboot_load): Declare tags
	as supported.
	(grub_multiboot_get_mbi_size): Take new tags into account.
	(fill_vbe_tag) [GRUB_MACHINE_HAS_VBE]: New function.
	(retrieve_video_parameters) [GRUB_MACHINE_HAS_VBE]:
	Call fill_vbe_tag when appropriate.
	(grub_multiboot_make_mbi): Properly align tags.
	* grub-core/video/i386/pc/vbe.c (grub_vbe_bios_get_pm_interface): New
	function.
	* include/grub/i386/pc/vbe.h (grub_vbe_bios_get_pm_interface): New
	proto.
	* include/grub/multiboot.h (GRUB_MACHINE_HAS_VBE): New definition.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-09-20 17:01:28 +02:00
commit f218b09c99
7 changed files with 215 additions and 9 deletions
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92
grub-core/loader/i386/multiboot_mbi.c
View file

@ -20,6 +20,7 @@
#ifdef GRUB_MACHINE_PCBIOS
#include <grub/machine/biosnum.h>
#include <grub/machine/apm.h>
#include <grub/machine/memory.h>
#endif
#include <grub/multiboot.h>
#include <grub/cpu/relocator.h>
@ -195,6 +196,10 @@ grub_multiboot_get_mbi_size (void)
+ grub_get_multiboot_mmap_count () * sizeof (struct multiboot_mmap_entry)
+ elf_sec_entsize * elf_sec_num
+ 256 * sizeof (struct multiboot_color)
#if GRUB_MACHINE_HAS_VBE
+ sizeof (struct grub_vbe_info_block)
+ sizeof (struct grub_vbe_mode_info_block)
#endif
+ ALIGN_UP (sizeof (struct multiboot_apm_info), 4);
}
@ -238,6 +243,77 @@ grub_fill_multiboot_mmap (struct multiboot_mmap_entry *first_entry)
grub_mmap_iterate (hook);
}
#if GRUB_MACHINE_HAS_VBE
static grub_err_t
fill_vbe_info (struct multiboot_info *mbi, grub_uint8_t *ptrorig,
grub_uint32_t ptrdest, int fill_generic)
{
grub_vbe_status_t status;
grub_uint32_t vbe_mode;
void *scratch = (void *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
struct grub_vbe_mode_info_block *mode_info;
status = grub_vbe_bios_get_controller_info (scratch);
if (status != GRUB_VBE_STATUS_OK)
return grub_error (GRUB_ERR_IO, "Can't get controller info.");
mbi->vbe_control_info = ptrdest;
grub_memcpy (ptrorig, scratch, sizeof (struct grub_vbe_info_block));
ptrorig += sizeof (struct grub_vbe_info_block);
ptrdest += sizeof (struct grub_vbe_info_block);
status = grub_vbe_bios_get_mode (scratch);
vbe_mode = *(grub_uint32_t *) scratch;
if (status != GRUB_VBE_STATUS_OK)
return grub_error (GRUB_ERR_IO, "can't get VBE mode");
mbi->vbe_mode = vbe_mode;
mode_info = (struct grub_vbe_mode_info_block *) ptrorig;
mbi->vbe_mode_info = ptrdest;
/* get_mode_info isn't available for mode 3. */
if (vbe_mode == 3)
{
grub_memset (mode_info, 0, sizeof (struct grub_vbe_mode_info_block));
mode_info->memory_model = GRUB_VBE_MEMORY_MODEL_TEXT;
mode_info->x_resolution = 80;
mode_info->y_resolution = 25;
}
else
{
status = grub_vbe_bios_get_mode_info (vbe_mode, scratch);
if (status != GRUB_VBE_STATUS_OK)
return grub_error (GRUB_ERR_IO, "can't get mode info");
grub_memcpy (mode_info, scratch,
sizeof (struct grub_vbe_mode_info_block));
}
ptrorig += sizeof (struct grub_vbe_mode_info_block);
ptrdest += sizeof (struct grub_vbe_mode_info_block);
grub_vbe_bios_get_pm_interface (&mbi->vbe_interface_seg,
&mbi->vbe_interface_off,
&mbi->vbe_interface_len);
mbi->flags |= MULTIBOOT_INFO_VBE_INFO;
if (fill_generic && mode_info->memory_model == GRUB_VBE_MEMORY_MODEL_TEXT)
{
mbi->framebuffer_addr = 0xb8000;
mbi->framebuffer_pitch = 2 * mode_info->x_resolution;
mbi->framebuffer_width = mode_info->x_resolution;
mbi->framebuffer_height = mode_info->y_resolution;
mbi->framebuffer_bpp = 16;
mbi->framebuffer_type = MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT;
mbi->flags |= MULTIBOOT_INFO_FRAMEBUFFER_INFO;
}
return GRUB_ERR_NONE;
}
#endif
static grub_err_t
retrieve_video_parameters (struct multiboot_info *mbi,
grub_uint8_t *ptrorig, grub_uint32_t ptrdest)
@ -258,8 +334,13 @@ retrieve_video_parameters (struct multiboot_info *mbi,
grub_video_get_palette (0, ARRAY_SIZE (palette), palette);
driv_id = grub_video_get_driver_id ();
#if GRUB_MACHINE_HAS_VGA_TEXT
if (driv_id == GRUB_VIDEO_DRIVER_NONE)
return fill_vbe_info (mbi, ptrorig, ptrdest, 1);
#else
if (driv_id == GRUB_VIDEO_DRIVER_NONE)
return GRUB_ERR_NONE;
#endif
err = grub_video_get_info_and_fini (&mode_info, &framebuffer);
if (err)
@ -307,6 +388,11 @@ retrieve_video_parameters (struct multiboot_info *mbi,
mbi->flags |= MULTIBOOT_INFO_FRAMEBUFFER_INFO;
#if GRUB_MACHINE_HAS_VBE
if (driv_id == GRUB_VIDEO_DRIVER_VBE)
return fill_vbe_info (mbi, ptrorig, ptrdest, 0);
#endif
return GRUB_ERR_NONE;
}
@ -440,6 +526,12 @@ grub_multiboot_make_mbi (grub_uint32_t *target)
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
#if GRUB_MACHINE_HAS_VBE
ptrorig += sizeof (struct grub_vbe_info_block);
ptrdest += sizeof (struct grub_vbe_info_block);
ptrorig += sizeof (struct grub_vbe_mode_info_block);
ptrdest += sizeof (struct grub_vbe_mode_info_block);
#endif
return GRUB_ERR_NONE;
}