Rev 786 | Rev 1044 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 756 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #include <genarch/mm/page_pt.h> |
||
| 30 | #include <mm/page.h> |
||
| 31 | #include <mm/frame.h> |
||
| 32 | #include <mm/as.h> |
||
| 33 | #include <arch/mm/page.h> |
||
| 34 | #include <arch/mm/as.h> |
||
| 35 | #include <arch/types.h> |
||
| 36 | #include <typedefs.h> |
||
| 37 | #include <memstr.h> |
||
| 38 | #include <arch.h> |
||
| 39 | |||
| 40 | static pte_t *ptl0_create(int flags); |
||
| 41 | |||
| 42 | as_operations_t as_pt_operations = { |
||
| 43 | .page_table_create = ptl0_create |
||
| 44 | }; |
||
| 45 | |||
| 46 | /** Create PTL0. |
||
| 47 | * |
||
| 48 | * PTL0 of 4-level page table will be created for each address space. |
||
| 49 | * |
||
| 50 | * @param flags Flags can specify whether ptl0 is for the kernel address space. |
||
| 51 | * |
||
| 52 | * @return New PTL0. |
||
| 53 | */ |
||
| 54 | pte_t *ptl0_create(int flags) |
||
| 55 | { |
||
| 56 | pte_t *src_ptl0, *dst_ptl0; |
||
| 57 | ipl_t ipl; |
||
| 58 | |||
| 814 | palkovsky | 59 | dst_ptl0 = (pte_t *) PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA | FRAME_PANIC))); |
| 756 | jermar | 60 | |
| 61 | if (flags & FLAG_AS_KERNEL) { |
||
| 62 | memsetb((__address) dst_ptl0, PAGE_SIZE, 0); |
||
| 63 | } else { |
||
| 64 | /* |
||
| 65 | * Copy the kernel address space portion to new PTL0. |
||
| 66 | * TODO: copy only kernel address space. |
||
| 67 | */ |
||
| 68 | |||
| 69 | ipl = interrupts_disable(); |
||
| 70 | spinlock_lock(&AS_KERNEL->lock); |
||
| 71 | src_ptl0 = (pte_t *) PA2KA((__address) AS_KERNEL->page_table); |
||
| 72 | memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE); |
||
| 73 | spinlock_unlock(&AS_KERNEL->lock); |
||
| 74 | interrupts_restore(ipl); |
||
| 75 | } |
||
| 76 | |||
| 77 | return (pte_t *) KA2PA((__address) dst_ptl0); |
||
| 78 | } |