| 0,0 → 1,78 |
|---|
| /* |
| * Copyright (C) 2006 Jakub Jermar |
| * 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. |
| */ |
| |
| #include <genarch/mm/page_pt.h> |
| #include <mm/page.h> |
| #include <mm/frame.h> |
| #include <mm/as.h> |
| #include <arch/mm/page.h> |
| #include <arch/mm/as.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <memstr.h> |
| #include <arch.h> |
| |
| static pte_t *ptl0_create(int flags); |
| |
| as_operations_t as_pt_operations = { |
| .page_table_create = ptl0_create |
| }; |
| |
| /** Create PTL0. |
| * |
| * PTL0 of 4-level page table will be created for each address space. |
| * |
| * @param flags Flags can specify whether ptl0 is for the kernel address space. |
| * |
| * @return New PTL0. |
| */ |
| pte_t *ptl0_create(int flags) |
| { |
| pte_t *src_ptl0, *dst_ptl0; |
| ipl_t ipl; |
| |
| dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC, ONE_FRAME, NULL); |
| |
| if (flags & FLAG_AS_KERNEL) { |
| memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
| } else { |
| /* |
| * Copy the kernel address space portion to new PTL0. |
| * TODO: copy only kernel address space. |
| */ |
| |
| ipl = interrupts_disable(); |
| spinlock_lock(&AS_KERNEL->lock); |
| src_ptl0 = (pte_t *) PA2KA((__address) AS_KERNEL->page_table); |
| memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE); |
| spinlock_unlock(&AS_KERNEL->lock); |
| interrupts_restore(ipl); |
| } |
| |
| return (pte_t *) KA2PA((__address) dst_ptl0); |
| } |