cos2000v2/lib/multiboot.c

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/*******************************************************************************/
/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
/* */
#include "multiboot2.h"
static u32 infobloc;
/*******************************************************************************/
/* Initialise avec l'adresse du bloc multiboot2 */
void initmultiboot(const u32 addr)
{
infobloc=addr;
}
/*******************************************************************************/
/* Renvoie les informations souhaitées multiboot2 */
u32 getgrubinfo(u8 type)
{
struct multiboot_tag *tag;
unsigned size = *(unsigned *) infobloc;
for (tag = (struct multiboot_tag *) (infobloc + 8);
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_tag *) ((u8 *) tag + ((tag->size + 7) & ~7)))
if (tag->type==type) return tag;
}
/*******************************************************************************/
/* Renvoie la ligne de commande */
u8 *getgrubinfo_cmdline(void)
{
struct multiboot_tag_string *tag=getgrubinfo(MULTIBOOT_TAG_TYPE_CMDLINE);
return tag->string;
}
/*******************************************************************************/
/* Renvoie la quantité de mémoire */
u32 getgrubinfo_ram(void)
{
struct multiboot_tag_basic_meminfo *tag=getgrubinfo(MULTIBOOT_TAG_TYPE_BASIC_MEMINFO);
return tag->mem_upper;
}
/*******************************************************************************/
/* Renvoie le plan de la mémoire */
struct multiboot_memory_map_t *getgrubinfo_mem(void)
{
struct multiboot_memory_map_t *tag=getgrubinfo(MULTIBOOT_TAG_TYPE_MMAP);
return tag;
}
/*******************************************************************************/
/* Renvoie les information sur le framebuffer */
struct multiboot_tag_framebuffer *getgrubinfo_fb(void)
{
struct multiboot_tag_framebuffer *tag=getgrubinfo(MULTIBOOT_TAG_TYPE_FRAMEBUFFER);
return tag;
}
/*******************************************************************************/
/* Affiche les informations multiboot2 ;*/
void getgrubinfo_all(void)
{
struct multiboot_tag *tag;
u32 size = *(unsigned *) infobloc;
if (infobloc & 7) print("Attention : Bloc non aligne...");
printf(" Taille :% 4u\r\n", (u32)size);
for (tag = (struct multiboot_tag *) (infobloc + 8);
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_tag *) ((u8 *) tag + ((tag->size + 7) & ~7)))
{
printf ("--- Tag % hu, Taille % hu\r\n", tag->type, tag->size);
switch (tag->type)
{
case MULTIBOOT_TAG_TYPE_CMDLINE:
printf (" Ligne de lancement : %s\r\n",
((struct multiboot_tag_string *) tag)->string);
break;
case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME:
printf (" Chargeur de boot : %s\r\n",
((struct multiboot_tag_string *) tag)->string);
break;
case MULTIBOOT_TAG_TYPE_MODULE:
printf (" Module %X-%X. Command line %s\r\n",
((struct multiboot_tag_module *) tag)->mod_start,
((struct multiboot_tag_module *) tag)->mod_end,
((struct multiboot_tag_module *) tag)->cmdline);
break;
case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO:
printf (" Memoire basse : %H, memoire haute = %lH\r\n",
((struct multiboot_tag_basic_meminfo *) tag)->mem_lower<<10,
((u64)((struct multiboot_tag_basic_meminfo *) tag)->mem_upper)<<10);
break;
case MULTIBOOT_TAG_TYPE_BOOTDEV:
printf (" Peripherique de demarrage : %Y,%u,%u\r\n\r\n",
((struct multiboot_tag_bootdev *) tag)->biosdev,
((struct multiboot_tag_bootdev *) tag)->slice,
((struct multiboot_tag_bootdev *) tag)->part);
break;
case MULTIBOOT_TAG_TYPE_MMAP:
{
multiboot_memory_map_t *mmap;
printf ("*** Plan de memoire ***\r\n");
for (mmap = ((struct multiboot_tag_mmap *) tag)->entries;(u8 *) mmap < (u8 *) tag + tag->size; mmap = (multiboot_memory_map_t *)
((unsigned long) mmap + ((struct multiboot_tag_mmap *) tag)->entry_size))
printf (" adresse: %lY, taille:%lY, type:%Y\r\n",
(u64) (mmap->addr),
(u64) (mmap->len),
(u32) (mmap->type));
break;
}
case MULTIBOOT_TAG_TYPE_FRAMEBUFFER:
{
struct multiboot_tag_framebuffer *tagfb = (struct multiboot_tag_framebuffer *) tag;
printf (" Framebuffer, resolution %d*%d*%d adresse: %X, ",tagfb->common.framebuffer_width,tagfb->common.framebuffer_height,tagfb->common.framebuffer_bpp,tagfb->common.framebuffer_addr);
switch (tagfb->common.framebuffer_type)
{
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
printf ("mode graphique indexé\r\n");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
printf ("mode graphique RGB\r\n");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
printf ("mode texte EGA\r\n");
break;
}
break;
}
case MULTIBOOT_TAG_TYPE_VBE:
{
struct multiboot_tag_vbe *tagvbe = (struct multiboot_tag_framebuffer *) tag;
printf (" VBE 2.0, mode %Y, adresse %hY:%hY-%hY\r\n", tagvbe->vbe_mode,tagvbe->vbe_interface_seg,tagvbe->vbe_interface_off,tagvbe->vbe_interface_len);
}
}
}
}
/*******************************************************************************/