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Rev 1959 Rev 2017
Line 69... Line 69...
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extern void xen_callback(void);
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extern void xen_callback(void);
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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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    xen_vm_assist(VMASST_CMD_ENABLE, VMASST_TYPE_WRITABLE_PAGETABLES);
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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((uintptr_t) &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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    xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG);
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    ASSERT(xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG) == 0);
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    if (!(start_info.flags & SIF_INITDOMAIN)) {
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        /* Map console frame */
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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 = start_info.console_mfn;
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        pte.frame_address = start_info.console.domU.mfn;
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    xen_update_va_mapping(&console_page, pte, UVMF_INVLPG);
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        ASSERT(xen_update_va_mapping(&console_page, pte, UVMF_INVLPG) == 0);
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    } else
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        start_info.console.domU.evtchn = 0;
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    xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback);
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    ASSERT(xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback) == 0);
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    /* Create identity mapping */
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    /* Create identity mapping */
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    meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
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    meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
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    meminfo.size = start_info.frames - meminfo.start;
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    meminfo.size = start_info.frames - meminfo.start;
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    meminfo.reserved = 0;
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    meminfo.reserved = 0;
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    uintptr_t pa;
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    uintptr_t pa;
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    index_t last_ptl0 = 0;
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    index_t last_ptl0 = 0;
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    for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
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    for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
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        uintptr_t va = PA2KA(pa);
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        uintptr_t va = PA2KA(pa);
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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(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_FLAGS(tptl3, PTL3_INDEX(tva), PAGE_PRESENT);
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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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            last_ptl0 = PTL0_INDEX(va);
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            last_ptl0 = PTL0_INDEX(va);
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            meminfo.reserved++;
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            meminfo.reserved++;
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        }
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        }
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