karina
359eaeb405
fix(VMM): use correct APTable encoding for table descriptors fix(vmm): changed flags to match ARMv8
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
#pragma once
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#include <Types.h>
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#include <VM/PMM.h>
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#include "../Common/bootinfo.h"
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enum VMPTEFlags {
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// Descriptor type (bits [1:0])
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kPTEValid = (1ULL << 0), // 1 = Valid (fault if 0)
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kPTETable = (1ULL << 1), // For L0/L1/L2: table descriptor (bits[1:0]=11)
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kPTEPage = (1ULL << 1), // For L3: page descriptor (same bit, bits[1:0]=11)
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// MAIR attribute index (bits [4:2])
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kPTENormalMem = (0ULL << 2), // AttrIndx 0 → MAIR[7:0] = 0xFF (Normal, WB Cacheable)
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kPTEDeviceMem = (1ULL << 2), // AttrIndx 1 → MAIR[15:8] = 0x00 (Device-nGnRnE)
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// Leaf entry AP[2:1] (bits [7:6]):
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// AP[1] (bit 6): 0 = EL0 blocked, 1 = EL0 allowed
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// AP[2] (bit 7): 0 = Read/Write, 1 = Read-only
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kPTEUser = (1ULL << 6), // AP[1]=1: allow EL0 access
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kPTEAccessRW = (0ULL << 7), // AP[2]=0: writable for permitted levels
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kPTEAccessRO = (1ULL << 7), // AP[2]=1: read-only for all levels
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// Table descriptor APTable[1:0] (bits [62:61]):
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// 00 = no restriction, 01 = block EL0, 10 = reserved, 11 = read-only for all
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kPTETableNoEL0 = (1ULL << 61), // APTable[0]=1: prevent EL0 table walk
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kPTEInnerShare = (3ULL << 8), // Inner Shareable (SMP safe)
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kPTEAccessFlag = (1ULL << 10), // Access Flag (MUST be 1 to avoid faults)
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kPTEPrivNX = (1ULL << 53), // PXN: Privileged Execute Never
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kPTEUserNX = (1ULL << 54) // UXN: Unprivileged Execute Never
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};
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enum {
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kVMKernelVMA = 0xFFFFFFFF80000000,
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kHHDMOffset = 0xFFFF888000000000,
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kVMFbVirtBase = 0xFFFFFFFFFC000000,
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kKernelPhysBase = 0x40100000,
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};
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static inline Address VMKernelVirtToPhys(Address virt) {
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return virt - 0xFFFFFFFF80100000 + kKernelPhysBase;
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}
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static inline Address VMPhysToHHDM(Address phys) {
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return phys + kHHDMOffset;
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}
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static inline Address VMHHDMToPhys(Address virt) {
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return virt - kHHDMOffset;
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}
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extern Address* gVMKernelL0Table;
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extern Address gVMKernelL0Physical;
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Address* VMMMapPage(Address* l0Table, Address phys, Address virt, UInt64 flags);
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void VMMUnmapPage(Address* l0Table, Address virt);
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Pointer VMMGetOrAllocatePage(Address* l0Table, Address virt, UInt64 flags);
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void VMMInitialize(VMBootMemoryMap* bootMap, Bootinfo* info);
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