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1809 decky 1
/*
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 * Copyright (c) 2006 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup ia32xen_mm
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 * @{
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 */
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/** @file
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 */
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#include <arch/mm/page.h>
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#include <genarch/mm/page_pt.h>
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#include <arch/mm/frame.h>
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#include <mm/frame.h>
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#include <mm/page.h>
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#include <mm/as.h>
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#include <arch/types.h>
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#include <align.h>
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#include <config.h>
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#include <func.h>
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#include <arch/interrupt.h>
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#include <arch/asm.h>
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#include <debug.h>
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#include <memstr.h>
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#include <print.h>
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#include <interrupt.h>
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void page_arch_init(void)
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{
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    if (config.cpu_active == 1) {
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        page_mapping_operations = &pt_mapping_operations;
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        AS_KERNEL->genarch.page_table = (pte_t *) KA2PA(start_info.ptl0);
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    } else
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        SET_PTL0_ADDRESS_ARCH(AS_KERNEL->genarch.page_table);
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}
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void page_fault(int n, istate_t *istate)
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{
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    uintptr_t page;
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    pf_access_t access;
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    page = read_cr2();
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    if (istate->error_word & PFERR_CODE_RSVD)
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        panic("Reserved bit set in page directory.\n");
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    if (istate->error_word & PFERR_CODE_RW)
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        access = PF_ACCESS_WRITE;
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    else
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        access = PF_ACCESS_READ;
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    if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
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        fault_if_from_uspace(istate, "Page fault: %#x", page);
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        decode_istate(istate);
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        printf("page fault address: %#x\n", page);
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        panic("page fault\n");
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    }
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}
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/** @}
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 */