feat: compilation réussi des fonctions de pagination, manque FB VESA non paginé
This commit is contained in:
parent
b6f238ff8a
commit
f399a6bf5c
|
|
@ -30,6 +30,7 @@
|
|||
#define MAXPAGESSIZE KERNEL_HEAP-KERNEL_PAGES
|
||||
|
||||
/* page directory */
|
||||
#define PAGE_NOFLAG 0x0
|
||||
#define PAGE_PRESENT 0b000000001/* page directory / table */
|
||||
#define PAGE_WRITE 0b000000010 /* page lecture ecriture */
|
||||
#define PAGE_ALL 0b000000100 /* accessible user & supervisor */
|
||||
|
|
@ -94,43 +95,14 @@ void *vmalloc(u32 size);
|
|||
void vfree(void *vaddr);
|
||||
page *virtual_page_getfree(void);
|
||||
pd *virtual_pd_create();
|
||||
|
||||
/*
|
||||
Fonction à ajouter...pour gestion mémoire virtuelle
|
||||
u8* virtual_to_physical(u8 *vaddr)
|
||||
|
||||
|
||||
|
||||
void virtual_pd_page_remove(pd *dst, u8* vaddr)
|
||||
|
||||
void virtual_pd_page_add(pd *dst, u8* vaddr, u8 * paddr, u32 flags)
|
||||
|
||||
void virtual_range_use(pd *dst, u8 vaddr, u8 paddr, u8 len)
|
||||
|
||||
void virtual_range_free(pd *dst, u8 vaddr, u8 len)
|
||||
|
||||
void virtual_range_new(pd *dst, u8 vaddr, u8 len)
|
||||
|
||||
page *virtual_page_getfree(void)
|
||||
|
||||
void virtual_page_free(pd *dst, u8* vaddr)
|
||||
|
||||
void virtual_page_use(pd *dst, u8* vaddr)
|
||||
|
||||
void virtual_init(void)
|
||||
|
||||
|
||||
|
||||
|
||||
void virtual_range_use_kernel(u8 vaddr, u8 paddr, u8 len)
|
||||
|
||||
void virtual_range_free_kernel(u8 vaddr, u8 len)
|
||||
|
||||
void virtual_range_new_kernel(u8 vaddr, u8 len)
|
||||
|
||||
void virtual_range_use_current(u8 vaddr, u8 paddr, u8 len)
|
||||
|
||||
void virtual_range_free_current(u8 vaddr, u8 len)
|
||||
|
||||
void virtual_range_new_current(u8 vaddr, u8 len)
|
||||
*/
|
||||
void virtual_pd_destroy(pd *dst);
|
||||
void virtual_page_free(u8* vaddr);
|
||||
u8* virtual_to_physical(u8 *vaddr);
|
||||
void virtual_pd_page_remove(u8* vaddr);
|
||||
void virtual_pd_page_add(pd *dst, u8* vaddr, u8 * paddr, u32 flags);
|
||||
void virtual_range_use(pd *dst, u8 *vaddr, u8 *paddr, u64 len, u32 flags);
|
||||
void virtual_range_free(pd *dst, u8 *vaddr, u64 len);
|
||||
void virtual_range_new(pd *dst, u8 *vaddr, u64 len, u32 flags);
|
||||
void malloc_init(void);
|
||||
void identity_init(void);
|
||||
void registry_init(void);
|
||||
|
|
|
|||
196
lib/memory.c
196
lib/memory.c
|
|
@ -7,7 +7,6 @@
|
|||
#include "queue.h"
|
||||
#include "asm.h"
|
||||
|
||||
static pd *kerneldirectory=NULL; /* pointeur vers le page directory noyau */
|
||||
static u8 *kernelheap=NULL; /* pointeur vers le heap noyau */
|
||||
static u8 bitmap[MAXMEMPAGE / 8]; /* bitmap */
|
||||
static vrange_t vrange_head;
|
||||
|
|
@ -47,7 +46,7 @@ void *vmalloc(u32 size)
|
|||
realsize = sizeof(tmalloc) + size;
|
||||
if (realsize < MALLOC_MINIMUM)
|
||||
realsize = MALLOC_MINIMUM;
|
||||
chunk = KERNEL_HEAP;
|
||||
chunk = kernelheap;
|
||||
while (chunk->used || chunk->size < realsize) {
|
||||
if (chunk->size == 0)
|
||||
panic(sprintf("Element du heap %x defectueux avec une taille nulle (heap %x) !",chunk, kernelheap));
|
||||
|
|
@ -151,7 +150,8 @@ void physical_range_free(u64 addr,u64 len)
|
|||
|
||||
u8* physical_page_getfree(void)
|
||||
{
|
||||
u8 byte, bit;
|
||||
u32 byte;
|
||||
u8 bit;
|
||||
u32 page = 0;
|
||||
for (byte = 0; byte < sizeof(bitmap); byte++)
|
||||
if (bitmap[byte] != 0xFF)
|
||||
|
|
@ -195,10 +195,11 @@ void physical_init(void)
|
|||
physical_range_free(mmap->addr,mmap->len);
|
||||
else
|
||||
physical_range_use(mmap->addr,mmap->len);
|
||||
//physical_range_use(0x0,KERNELSIZE);
|
||||
physical_range_use(0x0,KERNELSIZE);
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Allocation de page virtuelle de mémoire */
|
||||
/* Retourne une page virtuelle de mémoire */
|
||||
|
||||
page *virtual_page_getfree(void)
|
||||
{
|
||||
|
|
@ -217,7 +218,7 @@ page *virtual_page_getfree(void)
|
|||
TAILQ_REMOVE(&vrange_head, vpages, tailq);
|
||||
vfree(vpages);
|
||||
}
|
||||
virtual_pd_page_add(kerneldirectory,vaddr,paddr, 0);
|
||||
virtual_pd_page_add(NULL,vaddr,paddr, 0);
|
||||
pg = (page*) vmalloc(sizeof(page));
|
||||
pg->vaddr = vaddr;
|
||||
pg->paddr = paddr;
|
||||
|
|
@ -234,20 +235,63 @@ pd *virtual_pd_create()
|
|||
u32 i;
|
||||
new = (pd *) vmalloc(sizeof(pd));
|
||||
new->addr = virtual_page_getfree();
|
||||
if (kerneldirectory!=NULL)
|
||||
{
|
||||
pdir = (u32 *) new->addr->vaddr;
|
||||
pd0 = (u32 *) kerneldirectory->addr->vaddr;
|
||||
pd0 = (u32 *) KERNEL_PD_ADDR;
|
||||
for (i = 0; i < 256; i++)
|
||||
pdir[i] = pd0[i];
|
||||
for (i = 256; i < 1023; i++)
|
||||
pdir[i] = 0;
|
||||
pdir[1023] = ((u32) new->addr->paddr | (PAGE_PRESENT | PAGE_WRITE));
|
||||
}
|
||||
TAILQ_INIT(&new->page_head);
|
||||
return new;
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Attache une page virtuelle de la mémoire dans le directory spécifié */
|
||||
|
||||
void virtual_pd_page_add(pd *dst, u8* vaddr, u8 * paddr, u32 flags)
|
||||
{
|
||||
u32 *pdir;
|
||||
u32 *ptable;
|
||||
u32 *pt;
|
||||
page *pg;
|
||||
int i;
|
||||
if (dst==NULL)
|
||||
if (vaddr > (u8 *) USER_CODE) {
|
||||
print("ERREUR: Adresse %X n'est pas dans l'espace noyau !\n", vaddr);
|
||||
return ;
|
||||
}
|
||||
pdir = (u32 *) (0xFFFFF000 | (((u32) vaddr & 0xFFC00000) >> 20));
|
||||
if ((*pdir & PAGE_PRESENT) == 0) {
|
||||
if (dst==NULL)
|
||||
panic(sprintf("Page table introuvable pour l'adresse %x !\r\n", vaddr));
|
||||
pg = virtual_page_getfree();
|
||||
pt = (u32 *) pg->vaddr;
|
||||
for (i = 1; i < 1024; i++)
|
||||
pt[i] = 0;
|
||||
*pdir = (u32) pg->paddr | (PAGE_PRESENT | PAGE_WRITE | flags);
|
||||
if (dst)
|
||||
TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
|
||||
}
|
||||
ptable = (u32 *) (0xFFC00000 | (((u32) vaddr & 0xFFFFF000) >> 10));
|
||||
*ptable = ((u32) paddr) | (PAGE_PRESENT | PAGE_WRITE | flags);
|
||||
return;
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Retire une page virtuelle de la mémoire dans le directory spécifié */
|
||||
|
||||
void virtual_pd_page_remove(u8* vaddr)
|
||||
{
|
||||
u32 *ptable;
|
||||
if (virtual_to_physical(vaddr)) {
|
||||
ptable = (u32 *) (0xFFC00000 | (((u32) vaddr & 0xFFFFF000) >> 10));
|
||||
*ptable = (*ptable & (~PAGE_PRESENT));
|
||||
asm("invlpg %0"::"m"(vaddr));
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Renvoie l'adresse physique de la page virtuel */
|
||||
|
||||
|
|
@ -265,6 +309,80 @@ u8* virtual_to_physical(u8 *vaddr)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Détermine une plage virtuelle de mémoire comme étant mappé aux adresses physiques spécifiées GENERIQUE*/
|
||||
void virtual_range_use(pd *dst, u8 *vaddr, u8 *paddr, u64 len, u32 flags)
|
||||
{
|
||||
u64 i;
|
||||
u32 realen=len/PAGESIZE;
|
||||
page *pg;
|
||||
if (len%PAGESIZE!=0) realen++;
|
||||
for(i=0;i<realen;i++)
|
||||
{
|
||||
pg = (page *) vmalloc(sizeof(page));
|
||||
pg->paddr = paddr+i*PAGESIZE;
|
||||
pg->vaddr = vaddr+i*PAGESIZE;
|
||||
TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
|
||||
virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
|
||||
}
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Supprime une plage virtuelle de mémoire GENERIQUE */
|
||||
void virtual_range_free(pd *dst, u8 *vaddr, u64 len)
|
||||
{
|
||||
u64 i;
|
||||
u32 realen=len/PAGESIZE;
|
||||
if (len%PAGESIZE!=0) realen++;
|
||||
for(i=0;i<realen;i++)
|
||||
{
|
||||
virtual_pd_page_remove(vaddr+i*PAGESIZE);
|
||||
virtual_page_free(vaddr);
|
||||
}
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Détermine une plage virtuelle de mémoire en attribuant de la mémoire physique GENERIQUE */
|
||||
void virtual_range_new(pd *dst, u8 *vaddr, u64 len, u32 flags)
|
||||
{
|
||||
u64 i;
|
||||
u32 realen=len/PAGESIZE;
|
||||
page *pg;
|
||||
if (len%PAGESIZE!=0) realen++;
|
||||
for(i=0;i<realen;i++)
|
||||
{
|
||||
pg = (page *) vmalloc(sizeof(page));
|
||||
pg->paddr = physical_page_getfree();
|
||||
pg->vaddr = (u8 *) (vaddr+i*PAGESIZE);
|
||||
TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
|
||||
virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
|
||||
}
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Détermine une plage virtuelle de mémoire comme étant mappé aux adresses physiques spécifiées pour le noyau*/
|
||||
|
||||
void virtual_range_use_kernel(u8 *vaddr, u8 *paddr, u64 *len, u32 flags)
|
||||
{
|
||||
virtual_range_use(NULL, vaddr, paddr, len, flags);
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Supprime une plage virtuelle de mémoire pour le noyau */
|
||||
|
||||
void virtual_range_free_kernel(u8 *vaddr, u64 len)
|
||||
{
|
||||
virtual_range_free(NULL, vaddr, len);
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Détermine une plage virtuelle de mémoire en attribuant de la mémoire physique pour le noyau */
|
||||
|
||||
void virtual_range_new_kernel(u8 *vaddr, u64 len, u32 flags)
|
||||
{
|
||||
virtual_range_new(NULL, vaddr, len, flags);
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Libère une page virtuelle de la mémoire */
|
||||
|
||||
|
|
@ -274,7 +392,7 @@ void virtual_page_free(u8* vaddr)
|
|||
u8 *paddr;
|
||||
paddr = virtual_to_physical(vaddr);
|
||||
if (paddr)
|
||||
virtual_page_free(paddr);
|
||||
physical_page_free(TOPAGE((u32) paddr));
|
||||
else {
|
||||
printf("Aucune page associee a l'adresse virtuelle %x\n", vaddr);
|
||||
return;
|
||||
|
|
@ -323,28 +441,54 @@ void virtual_pd_destroy(pd *dst)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Initialise une pages virtuelles (size) pour le heap du noyau */
|
||||
void malloc_init(void)
|
||||
{
|
||||
kernelheap=KERNEL_HEAP;
|
||||
tmalloc *chunk;
|
||||
chunk = (tmalloc *) kernelheap;
|
||||
virtual_pd_page_add(NULL, KERNEL_HEAP, physical_page_getfree(), PAGE_NOFLAG);
|
||||
chunk->size = PAGESIZE;
|
||||
chunk->used = 0;
|
||||
//virtual_range_new_kernel(kernelheap, chunk->size, PAGE_NOFLAG);
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Initialisation d'une STAILQ pour la gestion virtuelle de la mémoire */
|
||||
|
||||
void virtual_init(void)
|
||||
{
|
||||
kernelheap = (u8 *) KERNEL_HEAP;
|
||||
vrange *vpages = (vrange*) vmalloc(sizeof(vrange));
|
||||
vpages->vaddrlow = (u8 *) KERNEL_HEAP;
|
||||
vpages->vaddrlow = (u8 *) KERNEL_HEAP+1;
|
||||
vpages->vaddrhigh = (u8 *) KERNEL_HEAP+MAXHEAPSIZE;
|
||||
TAILQ_INIT(&vrange_head);
|
||||
TAILQ_INSERT_TAIL(&vrange_head, vpages, tailq);
|
||||
kerneldirectory=virtual_pd_create();
|
||||
virtual_range_use_kernel(0x00000000, 0x00000000, KERNELSIZE);
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Initialisation de la mémoire paginée */
|
||||
/* Initialisation des 8 premiers MB de la mémoire en identity mapping */
|
||||
|
||||
void initpaging(void)
|
||||
void identity_init(void)
|
||||
{
|
||||
u32 i;
|
||||
u32 *pd0 = KERNEL_PD_ADDR;
|
||||
u8 *pg0 = (u8 *) 0;
|
||||
u8 *pg1 = (u8 *) (PAGESIZE*PAGENUMBER);
|
||||
pd0[0] = ((u32) pg0 | (PAGE_PRESENT | PAGE_WRITE | PAGE_4MB));
|
||||
pd0[1] = ((u32) pg1 | (PAGE_PRESENT | PAGE_WRITE | PAGE_4MB));
|
||||
for (i = 2; i < 1023; i++)
|
||||
pd0[i] =
|
||||
((u32) pg1 + PAGESIZE * i) | (PAGE_PRESENT | PAGE_WRITE);
|
||||
pd0[1023] = ((u32) pd0 | (PAGE_PRESENT | PAGE_WRITE));
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Initialisation des registres CR0, CR3, CR4 */
|
||||
|
||||
void registry_init(void)
|
||||
{
|
||||
physical_init();
|
||||
virtual_init();
|
||||
asm("mov %[directory_addr], %%eax \n \
|
||||
mov %%eax, %%cr3 \n \
|
||||
mov %%cr4, %%eax \n \
|
||||
|
|
@ -352,7 +496,19 @@ void initpaging(void)
|
|||
mov %%eax, %%cr4 \n \
|
||||
mov %%cr0, %%eax \n \
|
||||
or $0x80000001, %%eax \n \
|
||||
mov %%eax, %%cr0"::[directory_addr]"m"(kerneldirectory->addr));
|
||||
mov %%eax, %%cr0"::[directory_addr]"i"(KERNEL_PD_ADDR));
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
/* Initialisation de la mémoire paginée */
|
||||
|
||||
void initpaging(void)
|
||||
{
|
||||
identity_init();
|
||||
registry_init();
|
||||
physical_init();
|
||||
malloc_init();
|
||||
virtual_init();
|
||||
}
|
||||
|
||||
/*******************************************************************************/
|
||||
|
|
|
|||
Loading…
Reference in New Issue