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32 | /** @file |
32 | /** @file |
33 | * @ingroup xen32mm |
33 | * @ingroup xen32mm |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <mm/frame.h> |
36 | #include <mm/frame.h> |
37 | #include <arch/mm/frame.h> |
- | |
38 | #include <mm/as.h> |
- | |
39 | #include <config.h> |
37 | #include <config.h> |
40 | #include <arch/boot/boot.h> |
- | |
41 | #include <arch/hypercall.h> |
- | |
42 | #include <panic.h> |
- | |
43 | #include <debug.h> |
- | |
44 | #include <align.h> |
- | |
45 | #include <macros.h> |
- | |
46 | - | ||
47 | #include <console/cmd.h> |
- | |
48 | #include <console/kconsole.h> |
- | |
49 | - | ||
50 | uintptr_t last_frame = 0; |
- | |
51 | - | ||
52 | #define L0_PT_SHIFT 10 |
- | |
53 | #define L3_PT_SHIFT 0 |
- | |
54 | - | ||
55 | #define L0_PT_ENTRIES 1024 |
- | |
56 | #define L3_PT_ENTRIES 1024 |
- | |
57 | - | ||
58 | #define L0_INDEX_MASK (L0_PT_ENTRIES - 1) |
- | |
59 | #define L3_INDEX_MASK (L3_PT_ENTRIES - 1) |
- | |
60 | - | ||
61 | #define PFN2PTL0_INDEX(pfn) ((pfn >> L0_PT_SHIFT) & L0_INDEX_MASK) |
- | |
62 | #define PFN2PTL3_INDEX(pfn) ((pfn >> L3_PT_SHIFT) & L3_INDEX_MASK) |
- | |
63 | - | ||
64 | #define PAGE_MASK (~(PAGE_SIZE - 1)) |
- | |
65 | - | ||
66 | #define _PAGE_PRESENT 0x001UL |
- | |
67 | #define _PAGE_RW 0x002UL |
- | |
68 | #define _PAGE_USER 0x004UL |
- | |
69 | #define _PAGE_PWT 0x008UL |
- | |
70 | #define _PAGE_PCD 0x010UL |
- | |
71 | #define _PAGE_ACCESSED 0x020UL |
- | |
72 | #define _PAGE_DIRTY 0x040UL |
- | |
73 | #define _PAGE_PAT 0x080UL |
- | |
74 | #define _PAGE_PSE 0x080UL |
- | |
75 | #define _PAGE_GLOBAL 0x100UL |
- | |
76 | - | ||
77 | #define L0_PROT (_PAGE_PRESENT | _PAGE_ACCESSED) |
- | |
78 | #define L3_PROT (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED) |
- | |
79 | 38 | ||
80 | void frame_arch_init(void) |
39 | void frame_arch_init(void) |
81 | { |
40 | { |
82 | if (config.cpu_active == 1) { |
41 | if (config.cpu_active == 1) { |
83 | /* The only memory zone starts just after page table */ |
- | |
84 | pfn_t start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames; |
- | |
85 | size_t size = start_info.frames - start; |
- | |
86 | - | ||
87 | /* Create identity mapping */ |
42 | /* The only memory zone */ |
88 | pfn_t phys; |
- | |
89 | count_t count = 0; |
- | |
90 | for (phys = start; phys < start + size; phys++) { |
- | |
91 | mmu_update_t updates[L3_PT_ENTRIES]; |
- | |
92 | pfn_t virt = ADDR2PFN(PA2KA(PFN2ADDR(phys))); |
- | |
93 | - | ||
94 | size_t ptl0_index = PFN2PTL0_INDEX(virt); |
- | |
95 | size_t ptl3_index = PFN2PTL3_INDEX(virt); |
- | |
96 | - | ||
97 | pte_t *ptl3 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index].frame_address); |
43 | zone_create(meminfo.start, meminfo.size, meminfo.start + meminfo.reserved, 0); |
98 | - | ||
99 | if (ptl3 == 0) { |
- | |
100 | mmuext_op_t mmu_ext; |
- | |
101 | - | ||
102 | pfn_t virt2 = ADDR2PFN(PA2KA(PFN2ADDR(start))); |
- | |
103 | - | ||
104 | /* New L1 page table entry needed */ |
- | |
105 | memsetb(PFN2ADDR(virt2), PAGE_SIZE, 0); |
- | |
106 | - | ||
107 | size_t ptl0_index2 = PFN2PTL0_INDEX(virt2); |
- | |
108 | size_t ptl3_index2 = PFN2PTL3_INDEX(virt2); |
- | |
109 | pte_t *ptl3_2 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index2].frame_address); |
- | |
110 | - | ||
111 | if (ptl3_2 == 0) |
- | |
112 | panic("Unable to find page table reference"); |
44 | frame_mark_unavailable(meminfo.start, meminfo.reserved); |
113 | - | ||
114 | updates[count].ptr = (uintptr_t) &ptl3_2[ptl3_index2]; |
- | |
115 | updates[count].val = PA2MA(PFN2ADDR(start)) | L0_PROT; |
- | |
116 | if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0) |
- | |
117 | panic("Unable to map new page table"); |
- | |
118 | count = 0; |
- | |
119 | - | ||
120 | mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; |
- | |
121 | mmu_ext.arg1.mfn = ADDR2PFN(PA2MA(PFN2ADDR(start))); |
- | |
122 | if (xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) < 0) |
- | |
123 | panic("Error pinning new page table"); |
- | |
124 | - | ||
125 | pte_t *ptl0 = (pte_t *) PA2MA(KA2PA(start_info.ptl0)); |
- | |
126 | - | ||
127 | updates[count].ptr = (uintptr_t) &ptl0[ptl0_index]; |
- | |
128 | updates[count].val = PA2MA(PFN2ADDR(start)) | L3_PROT; |
- | |
129 | if (xen_mmu_update(updates, count + 1, NULL, DOMID_SELF) < 0) |
- | |
130 | panic("Unable to update PTE for page table"); |
- | |
131 | count = 0; |
- | |
132 | - | ||
133 | ptl3 = (pte_t *) PFN2ADDR(start_info.ptl0[ptl0_index].frame_address); |
- | |
134 | start++; |
- | |
135 | size--; |
- | |
136 | } |
- | |
137 | - | ||
138 | updates[count].ptr = (uintptr_t) &ptl3[ptl3_index]; |
- | |
139 | updates[count].val = PA2MA(PFN2ADDR(phys)) | L3_PROT; |
- | |
140 | count++; |
- | |
141 | - | ||
142 | if ((count == L3_PT_ENTRIES) || (phys + 1 == start + size)) { |
- | |
143 | if (xen_mmu_update(updates, count, NULL, DOMID_SELF) < 0) |
- | |
144 | panic("Unable to update PTE"); |
- | |
145 | count = 0; |
- | |
146 | } |
- | |
147 | } |
- | |
148 | - | ||
149 | zone_create(start, size, start, 0); |
- | |
150 | last_frame = start + size; |
- | |
151 | } |
45 | } |
152 | } |
46 | } |
153 | 47 | ||
154 | /** @} |
48 | /** @} |
155 | */ |
49 | */ |