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Rev 2725 Rev 3104
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extern void xen_failsafe_callback(void);
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extern void xen_failsafe_callback(void);
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void arch_pre_main(void)
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void arch_pre_main(void)
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{
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{
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    pte_t pte;
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    pte_t pte;
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    memsetb((uintptr_t) &pte, sizeof(pte), 0);
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    memsetb(&pte, sizeof(pte), 0);
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    pte.present = 1;
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    pte.present = 1;
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    pte.writeable = 1;
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    pte.writeable = 1;
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    pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
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    pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
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    ASSERT(xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG) == 0);
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    ASSERT(xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG) == 0);
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        if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
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        if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
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            /* New page directory entry needed */
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            /* New page directory entry needed */
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            uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
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            uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
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            uintptr_t tva = PA2KA(tpa);
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            uintptr_t tva = PA2KA(tpa);
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            memsetb(tva, PAGE_SIZE, 0);
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            memsetb((void *) tva, PAGE_SIZE, 0);
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            pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
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            pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
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            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), 0);
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            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), 0);
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            SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
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            SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
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            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), tpa);
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            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), tpa);