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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/mutex.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_destroy(pte_t *page_table);
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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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as_operations_t as_ht_operations = {
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as_operations_t as_ht_operations = {
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    .page_table_create = ht_create,
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    .page_table_create = ht_create,
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    .page_table_destroy = ht_destroy,
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    .page_table_lock = ht_lock,
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    .page_table_lock = ht_lock,
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    .page_table_unlock = ht_unlock,
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    .page_table_unlock = ht_unlock,
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};
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};
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        mutex_initialize(&page_ht_lock);
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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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/** Destroy page table.
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 *
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 * Actually do nothing as the global page hash table is used.
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 *
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 * @param page_table This parameter is ignored.
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 */
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void ht_destroy(pte_t *page_table)
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{
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    /* No-op. */
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}
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/** Lock page table.
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/** Lock page table.
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 *
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 *
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 * Lock address space and page hash table.
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 * Lock address space and page hash table.
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 * Interrupts must be disabled.
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 * Interrupts must be disabled.
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 *
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 *