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 * @param asid Address space, if required by type.
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 * @param asid Address space, if required by type.
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 * @param page Virtual page address, if required by type.
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 * @param page Virtual page address, if required by type.
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 * @param count Number of pages, if required by type.
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 * @param count Number of pages, if required by type.
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 */
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 */
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void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid,
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void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid,
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    uintptr_t page, count_t count)
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    uintptr_t page, size_t count)
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{
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{
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    unsigned int i;
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    unsigned int i;
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    CPU->tlb_active = 0;
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    CPU->tlb_active = 0;
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    spinlock_lock(&tlblock);
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    spinlock_lock(&tlblock);
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            cpu->tlb_messages[0].count = 0;
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            cpu->tlb_messages[0].count = 0;
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        } else {
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        } else {
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            /*
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            /*
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             * Enqueue the message.
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             * Enqueue the message.
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             */
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             */
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            index_t idx = cpu->tlb_messages_count++;
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            size_t idx = cpu->tlb_messages_count++;
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            cpu->tlb_messages[idx].type = type;
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            cpu->tlb_messages[idx].type = type;
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            cpu->tlb_messages[idx].asid = asid;
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            cpu->tlb_messages[idx].asid = asid;
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            cpu->tlb_messages[idx].page = page;
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            cpu->tlb_messages[idx].page = page;
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            cpu->tlb_messages[idx].count = count;
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            cpu->tlb_messages[idx].count = count;
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        }
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        }
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void tlb_shootdown_ipi_recv(void)
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void tlb_shootdown_ipi_recv(void)
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{
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{
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    tlb_invalidate_type_t type;
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    tlb_invalidate_type_t type;
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    asid_t asid;
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    asid_t asid;
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    uintptr_t page;
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    uintptr_t page;
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    count_t count;
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    size_t count;
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    unsigned int i;
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    unsigned int i;
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    ASSERT(CPU);
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    ASSERT(CPU);
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    CPU->tlb_active = 0;
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    CPU->tlb_active = 0;