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#include <synch/spinlock.h>
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#include <synch/spinlock.h>
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#include <arch.h>
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#include <arch.h>
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#include <debug.h>
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#include <debug.h>
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#include <memstr.h>
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#include <memstr.h>
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#include <adt/hash_table.h>
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#include <adt/hash_table.h>
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#include <align.h>
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static index_t hash(__native key[]);
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static index_t hash(__native key[]);
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static bool compare(__native key[], count_t keys, link_t *item);
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static bool compare(__native key[], count_t keys, link_t *item);
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static void remove_callback(link_t *item);
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static void remove_callback(link_t *item);
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 * @param flags Flags to be used for mapping.
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 * @param flags Flags to be used for mapping.
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 */
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 */
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void ht_mapping_insert(as_t *as, __address page, __address frame, int flags)
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void ht_mapping_insert(as_t *as, __address page, __address frame, int flags)
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{
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{
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    pte_t *t;
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    pte_t *t;
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    __native key[2] = { (__address) as, page };
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    __native key[2] = { (__address) as, page = ALIGN_DOWN(page, PAGE_SIZE) };
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    spinlock_lock(&page_ht_lock);
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    spinlock_lock(&page_ht_lock);
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    if (!hash_table_find(&page_ht, key)) {
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    if (!hash_table_find(&page_ht, key)) {
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        t = (pte_t *) malloc(sizeof(pte_t), FRAME_ATOMIC);
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        t = (pte_t *) malloc(sizeof(pte_t), FRAME_ATOMIC);
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 * @param as Address space to wich page belongs.
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 * @param as Address space to wich page belongs.
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 * @param page Virtual address of the page to be demapped.
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 * @param page Virtual address of the page to be demapped.
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 */
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 */
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void ht_mapping_remove(as_t *as, __address page)
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void ht_mapping_remove(as_t *as, __address page)
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{
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{
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    __native key[2] = { (__address) as, page };
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    __native key[2] = { (__address) as, page = ALIGN_DOWN(page, PAGE_SIZE) };
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    spinlock_lock(&page_ht_lock);
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    spinlock_lock(&page_ht_lock);
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    /*
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    /*
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     * Note that removed PTE's will be freed
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     * Note that removed PTE's will be freed
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 */
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 */
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pte_t *ht_mapping_find(as_t *as, __address page)
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pte_t *ht_mapping_find(as_t *as, __address page)
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{
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{
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    link_t *hlp;
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    link_t *hlp;
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    pte_t *t = NULL;
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    pte_t *t = NULL;
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    __native key[2] = { (__address) as, page };
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    __native key[2] = { (__address) as, page = ALIGN_DOWN(page, PAGE_SIZE) };
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    spinlock_lock(&page_ht_lock);
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    spinlock_lock(&page_ht_lock);
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    hlp = hash_table_find(&page_ht, key);
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    hlp = hash_table_find(&page_ht, key);
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    if (hlp)
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    if (hlp)