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#include <mm/frame.h>
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#include <mm/frame.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <typedefs.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 <synch/spinlock.h>
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#include <synch/mutex.h>
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static pte_t *ht_create(int flags);
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static pte_t *ht_create(int flags);
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static void ht_lock(as_t *as, bool lock);
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static void ht_lock(as_t *as, bool lock);
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static void ht_unlock(as_t *as, bool unlock);
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static void ht_unlock(as_t *as, bool unlock);
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 */
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 */
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pte_t *ht_create(int flags)
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pte_t *ht_create(int flags)
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{
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{
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    if (flags & FLAG_AS_KERNEL) {
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    if (flags & FLAG_AS_KERNEL) {
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        hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations);
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        hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations);
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        mutex_initialize(&page_ht_lock);
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    }
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    }
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    return NULL;
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    return NULL;
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}
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}
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/** Lock page table.
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/** Lock page table.
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 * @param lock If false, do not attempt to lock the address space.
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 * @param lock If false, do not attempt to lock the address space.
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 */
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 */
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void ht_lock(as_t *as, bool lock)
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void ht_lock(as_t *as, bool lock)
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{
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{
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    if (lock)
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    if (lock)
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        spinlock_lock(&as->lock);
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        mutex_lock(&as->lock);
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    spinlock_lock(&page_ht_lock);
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    mutex_lock(&page_ht_lock);
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}
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}
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/** Unlock page table.
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/** Unlock page table.
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 *
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 *
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 * Unlock address space and page hash table.
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 * Unlock address space and page hash table.
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 * @param as Address space.
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 * @param as Address space.
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 * @param unlock If false, do not attempt to lock the address space.
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 * @param unlock If false, do not attempt to lock the address space.
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 */
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 */
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void ht_unlock(as_t *as, bool unlock)
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void ht_unlock(as_t *as, bool unlock)
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{
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{
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    spinlock_unlock(&page_ht_lock);
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    mutex_unlock(&page_ht_lock);
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    if (unlock)
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    if (unlock)
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        spinlock_unlock(&as->lock);
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        mutex_unlock(&as->lock);
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}
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}