cos2000v2/lib/multiboot.c

159 lines
5.2 KiB
C

/*******************************************************************************/
/* 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_tag_mmap *getgrubinfo_mem(void)
{
struct multiboot_tag_mmap *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);
}
}
}
}
/*******************************************************************************/