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1809 | decky | 1 | /* |
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 | |||
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 | |||
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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1817 | decky | 41 | #include <arch/hypercall.h> |
1809 | decky | 42 | #include <panic.h> |
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 | |||
47 | #include <console/cmd.h> |
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48 | #include <console/kconsole.h> |
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49 | |||
50 | uintptr_t last_frame = 0; |
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51 | |||
1817 | decky | 52 | #define L1_PT_SHIFT 10 |
53 | #define L2_PT_SHIFT 0 |
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54 | |||
55 | #define L1_OFFSET_MASK 0x3ff |
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56 | #define L2_OFFSET_MASK 0x3ff |
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57 | |||
58 | #define PFN2PTL1_OFFSET(pfn) ((pfn >> L1_PT_SHIFT) & L1_OFFSET_MASK) |
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59 | #define PFN2PTL2_OFFSET(pfn) ((pfn >> L2_PT_SHIFT) & L2_OFFSET_MASK) |
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60 | |||
61 | #define PAGE_MASK (~(PAGE_SIZE - 1)) |
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62 | |||
63 | #define PTE2ADDR(pte) (pte & PAGE_MASK) |
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64 | |||
65 | #define _PAGE_PRESENT 0x001UL |
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66 | #define _PAGE_RW 0x002UL |
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67 | #define _PAGE_USER 0x004UL |
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68 | #define _PAGE_PWT 0x008UL |
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69 | #define _PAGE_PCD 0x010UL |
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70 | #define _PAGE_ACCESSED 0x020UL |
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71 | #define _PAGE_DIRTY 0x040UL |
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72 | #define _PAGE_PAT 0x080UL |
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73 | #define _PAGE_PSE 0x080UL |
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74 | #define _PAGE_GLOBAL 0x100UL |
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75 | |||
76 | #define L1_PROT (_PAGE_PRESENT | _PAGE_ACCESSED) |
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77 | #define L2_PROT (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED) |
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78 | |||
1809 | decky | 79 | void frame_arch_init(void) |
80 | { |
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81 | if (config.cpu_active == 1) { |
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1817 | decky | 82 | /* The only memory zone starts just after page table */ |
1816 | decky | 83 | pfn_t start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.pt_base), PAGE_SIZE)) + start_info.nr_pt_frames; |
84 | size_t size = start_info.nr_pages - start; |
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1809 | decky | 85 | |
1817 | decky | 86 | /* Create identity mapping */ |
87 | pfn_t phys; |
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88 | for (phys = start; phys < start + size; phys++) { |
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89 | mmu_update_t updates[1]; |
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90 | pfn_t virt = ADDR2PFN(PA2KA(PFN2ADDR(phys))); |
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91 | |||
92 | size_t ptl1_offset = PFN2PTL1_OFFSET(virt); |
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93 | size_t ptl2_offset = PFN2PTL2_OFFSET(virt); |
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94 | |||
95 | unsigned long *ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]); |
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96 | |||
97 | if (ptl2_base == 0) { |
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98 | mmuext_op_t mmu_ext; |
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99 | |||
100 | pfn_t virt2 = ADDR2PFN(PA2KA(PFN2ADDR(start))); |
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101 | |||
102 | /* New L1 page table entry needed */ |
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103 | memsetb(PFN2ADDR(virt2), PAGE_SIZE, 0); |
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104 | |||
105 | size_t ptl1_offset2 = PFN2PTL1_OFFSET(virt2); |
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106 | size_t ptl2_offset2 = PFN2PTL2_OFFSET(virt2); |
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107 | unsigned long *ptl2_base2 = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset2]); |
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108 | |||
109 | if (ptl2_base2 == 0) |
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110 | panic("Unable to find page table reference"); |
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111 | |||
112 | updates[0].ptr = (uintptr_t) &ptl2_base2[ptl2_offset2]; |
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113 | updates[0].val = PFN2ADDR(start_info.mfn_list[start]) | L1_PROT; |
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114 | if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
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115 | panic("Unable to map new page table"); |
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116 | |||
117 | mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; |
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118 | mmu_ext.arg1.mfn = start_info.mfn_list[start]; |
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119 | if (xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) < 0) |
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120 | panic("Error pinning new page table"); |
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121 | |||
122 | unsigned long *ptl0 = (unsigned long *) PFN2ADDR(start_info.mfn_list[ADDR2PFN(KA2PA(start_info.pt_base))]); |
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123 | |||
124 | updates[0].ptr = (uintptr_t) &ptl0[ptl1_offset]; |
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125 | updates[0].val = PFN2ADDR(start_info.mfn_list[start]) | L2_PROT; |
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126 | if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
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127 | panic("Unable to update PTE for page table"); |
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128 | |||
129 | ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]); |
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130 | start++; |
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131 | size--; |
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132 | } |
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133 | |||
134 | updates[0].ptr = (uintptr_t) &ptl2_base[ptl2_offset]; |
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135 | updates[0].val = PFN2ADDR(start_info.mfn_list[phys]) | L2_PROT; |
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136 | if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
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137 | panic("Unable to update PTE"); |
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138 | } |
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139 | |||
1816 | decky | 140 | zone_create(start, size, start, 0); |
141 | last_frame = start + size; |
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1809 | decky | 142 | } |
143 | } |
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144 | |||
145 | /** @} |
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146 | */ |