void BT_kFree(void *p) {
BT_CACHE **tag = (BT_CACHE **) p;
tag -= 1;
BT_CACHE *pCache = *tag;
if(pCache) {
BT_CacheFree(pCache, tag);
} else {
bt_page_free((BT_PHYS_ADDR) bt_virt_to_phys(tag));
}
}
static bt_paddr_t create_pgd(void) {
bt_paddr_t pg, pgd;
pg = bt_page_alloc(MMU_L1TBL_SIZE * 2);
if(!pg) {
return 0;
}
pgd = PGD_ALIGN(pg);
// Here we should free the uneeded (unaligned part), but this requires
// some small changes to the page allocator api.
BT_u32 gap = (BT_u32) (pgd - pg);
if(gap) {
bt_page_free(pg, gap);
}
bt_page_free((pgd + MMU_L1TBL_SIZE), (MMU_L1TBL_SIZE - gap));
return pgd | (g_asid++);
}
void bt_mmu_terminate(bt_pgd_t pgd_h) {
int i;
bt_pgd_t pgd = GET_PGD(pgd_h);
bt_pte_t pte;
bt_mmu_flush_tlb();
// Release all user page tables.
for(i = 0; i < PAGE_DIR(0xC0000000); i++) {
pte = (bt_pte_t) pgd[i];
if(pte) {
BT_CacheFree(&g_ptCache, (void *) ((BT_u32) pte & MMU_PTE_ADDRESS));
}
}
bt_page_free(bt_virt_to_phys(pgd), MMU_L1TBL_SIZE);
}
void BT_kFree(void *p) {
if(!p) return;
struct MEM_TAG *tag = (struct MEM_TAG *) p;
tag -= 1;
struct MAGIC_TAG *postmem = (struct MAGIC_TAG *) ((BT_u8 *) (tag+1) + tag->size);
if(!verify_tag(&tag->tag_0) || !verify_tag(&tag->tag_1) || !verify_tag(postmem)) {
BT_kPrint("Kernel Panic - Corrupted FREE");
while(1) {
;
}
}
BT_CACHE *pCache = tag->pCache;
if(pCache) {
BT_CacheFree(pCache, tag);
} else {
bt_page_free((BT_PHYS_ADDR) bt_virt_to_phys(tag), tag->size+sizeof(struct MEM_TAG)+sizeof(struct MAGIC_TAG));
}
}
