source: mainline/kernel/arch/ia32xen/src/mm/page.c@ ec04b20

/*
 * Copyright (C) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup ia32xen_mm
 * @{
 */
/** @file
 */

#include <arch/mm/page.h>
#include <genarch/mm/page_pt.h>
#include <arch/mm/frame.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <mm/as.h>
#include <arch/types.h>
#include <align.h>
#include <config.h>
#include <func.h>
#include <arch/interrupt.h>
#include <arch/asm.h>
#include <debug.h>
#include <memstr.h>
#include <print.h>
#include <interrupt.h>

void page_arch_init(void)
{
        if (config.cpu_active == 1) {
                page_mapping_operations = &pt_mapping_operations;
                AS_KERNEL->page_table = (pte_t *) KA2PA(start_info.ptl0);
        } else
                SET_PTL0_ADDRESS_ARCH(AS_KERNEL->page_table);
}

void page_fault(int n, istate_t *istate)
{
        uintptr_t page;
        pf_access_t access;
        
        page = read_cr2();
        
        if (istate->error_word & PFERR_CODE_RSVD)
                panic("Reserved bit set in page directory.\n");
        
        if (istate->error_word & PFERR_CODE_RW)
                access = PF_ACCESS_WRITE;
        else
                access = PF_ACCESS_READ;
        
        if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
                fault_if_from_uspace(istate, "Page fault: %#x", page);
                
                decode_istate(istate);
                printf("page fault address: %#x\n", page);
                panic("page fault\n");
        }
}

/** @}
 */