| 1 | /*
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| 2 | * Copyright (C) 2001-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup xen32mm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @ingroup xen32mm
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| 34 | */
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| 35 |
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| 36 | #include <mm/frame.h>
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| 37 | #include <arch/mm/frame.h>
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| 38 | #include <mm/as.h>
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| 39 | #include <config.h>
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| 40 | #include <arch/boot/boot.h>
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| 41 | #include <arch/hypercall.h>
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| 42 | #include <panic.h>
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| 43 | #include <debug.h>
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| 44 | #include <align.h>
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| 45 | #include <macros.h>
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| 46 |
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| 47 | #include <console/cmd.h>
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| 48 | #include <console/kconsole.h>
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| 49 |
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| 50 | uintptr_t last_frame = 0;
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| 51 |
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| 52 | #define L1_PT_SHIFT 10
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| 53 | #define L2_PT_SHIFT 0
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| 54 |
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| 55 | #define L1_PT_ENTRIES 1024
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| 56 | #define L2_PT_ENTRIES 1024
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| 57 |
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| 58 | #define L1_OFFSET_MASK (L1_PT_ENTRIES - 1)
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| 59 | #define L2_OFFSET_MASK (L2_PT_ENTRIES - 1)
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| 60 |
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| 61 | #define PFN2PTL1_OFFSET(pfn) ((pfn >> L1_PT_SHIFT) & L1_OFFSET_MASK)
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| 62 | #define PFN2PTL2_OFFSET(pfn) ((pfn >> L2_PT_SHIFT) & L2_OFFSET_MASK)
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| 63 |
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| 64 | #define PAGE_MASK (~(PAGE_SIZE - 1))
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| 65 |
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| 66 | #define PTE2ADDR(pte) (pte & PAGE_MASK)
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| 67 |
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| 68 | #define _PAGE_PRESENT 0x001UL
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| 69 | #define _PAGE_RW 0x002UL
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| 70 | #define _PAGE_USER 0x004UL
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| 71 | #define _PAGE_PWT 0x008UL
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| 72 | #define _PAGE_PCD 0x010UL
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| 73 | #define _PAGE_ACCESSED 0x020UL
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| 74 | #define _PAGE_DIRTY 0x040UL
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| 75 | #define _PAGE_PAT 0x080UL
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| 76 | #define _PAGE_PSE 0x080UL
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| 77 | #define _PAGE_GLOBAL 0x100UL
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| 78 |
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| 79 | #define L1_PROT (_PAGE_PRESENT | _PAGE_ACCESSED)
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| 80 | #define L2_PROT (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED)
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| 81 |
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| 82 | void frame_arch_init(void)
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| 83 | {
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| 84 | if (config.cpu_active == 1) {
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| 85 | /* The only memory zone starts just after page table */
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| 86 | pfn_t start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.pt_base), PAGE_SIZE)) + start_info.nr_pt_frames;
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| 87 | size_t size = start_info.nr_pages - start;
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| 88 |
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| 89 | /* Create identity mapping */
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| 90 | pfn_t phys;
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| 91 | count_t count = 0;
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| 92 | for (phys = start; phys < start + size; phys++) {
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| 93 | mmu_update_t updates[L2_PT_ENTRIES];
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| 94 | pfn_t virt = ADDR2PFN(PA2KA(PFN2ADDR(phys)));
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| 95 |
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| 96 | size_t ptl1_offset = PFN2PTL1_OFFSET(virt);
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| 97 | size_t ptl2_offset = PFN2PTL2_OFFSET(virt);
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| 98 |
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| 99 | unsigned long *ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]);
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| 100 |
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| 101 | if (ptl2_base == 0) {
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| 102 | mmuext_op_t mmu_ext;
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| 103 |
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| 104 | pfn_t virt2 = ADDR2PFN(PA2KA(PFN2ADDR(start)));
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| 105 |
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| 106 | /* New L1 page table entry needed */
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| 107 | memsetb(PFN2ADDR(virt2), PAGE_SIZE, 0);
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| 108 |
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| 109 | size_t ptl1_offset2 = PFN2PTL1_OFFSET(virt2);
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| 110 | size_t ptl2_offset2 = PFN2PTL2_OFFSET(virt2);
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| 111 | unsigned long *ptl2_base2 = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset2]);
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| 112 |
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| 113 | if (ptl2_base2 == 0)
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| 114 | panic("Unable to find page table reference");
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| 115 |
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| 116 | updates[count].ptr = (uintptr_t) &ptl2_base2[ptl2_offset2];
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| 117 | updates[count].val = PFN2ADDR(start_info.mfn_list[start]) | L1_PROT;
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| 118 | if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0)
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| 119 | panic("Unable to map new page table");
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| 120 | count = 0;
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| 121 |
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| 122 | mmu_ext.cmd = MMUEXT_PIN_L1_TABLE;
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| 123 | mmu_ext.arg1.mfn = start_info.mfn_list[start];
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| 124 | if (xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) < 0)
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| 125 | panic("Error pinning new page table");
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| 126 |
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| 127 | unsigned long *ptl0 = (unsigned long *) PFN2ADDR(start_info.mfn_list[ADDR2PFN(KA2PA(start_info.pt_base))]);
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| 128 |
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| 129 | updates[count].ptr = (uintptr_t) &ptl0[ptl1_offset];
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| 130 | updates[count].val = PFN2ADDR(start_info.mfn_list[start]) | L2_PROT;
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| 131 | if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0)
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| 132 | panic("Unable to update PTE for page table");
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| 133 | count = 0;
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| 134 |
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| 135 | ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]);
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| 136 | start++;
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| 137 | size--;
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| 138 | }
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| 139 |
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| 140 | updates[count].ptr = (uintptr_t) &ptl2_base[ptl2_offset];
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| 141 | updates[count].val = PFN2ADDR(start_info.mfn_list[phys]) | L2_PROT;
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| 142 | count++;
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| 143 |
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| 144 | if ((count == L2_PT_ENTRIES) || (phys + 1 == start + size)) {
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| 145 | if (xen_mmu_update(updates, count, NULL, DOMID_SELF) < 0)
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| 146 | panic("Unable to update PTE");
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| 147 | count = 0;
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| 148 | }
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| 149 | }
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| 150 |
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| 151 | zone_create(start, size, start, 0);
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| 152 | last_frame = start + size;
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| 153 | }
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| 154 | }
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| 155 |
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| 156 | /** @}
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| 157 | */
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