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More paging stuff.
The test userspace process now runs at linear address 0x300000 which is mapped to a dynamically allocated page from the MemoryManager. Cool!
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10 changed files with 339 additions and 66 deletions
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@ -1,5 +1,7 @@
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#pragma once
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#include <AK/Types.h>
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#define PACKED __attribute__ ((packed))
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#define NORETURN __attribute__ ((noreturn))
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#define PURE __attribute__ ((pure))
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@ -26,3 +28,42 @@ struct FarPtr {
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DWORD offset { 0 };
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WORD selector { 0 };
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} PACKED;
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class PhysicalAddress {
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public:
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PhysicalAddress() { }
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explicit PhysicalAddress(dword address) : m_address(address) { }
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dword get() const { return m_address; }
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void set(dword address) { m_address = address; }
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void mask(dword m) { m_address &= m; }
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byte* asPtr() { return reinterpret_cast<byte*>(m_address); }
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const byte* asPtr() const { return reinterpret_cast<const byte*>(m_address); }
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dword pageBase() const { return m_address & 0xfffff000; }
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private:
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dword m_address { 0 };
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};
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class LinearAddress {
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public:
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LinearAddress() { }
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explicit LinearAddress(dword address) : m_address(address) { }
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LinearAddress offset(dword o) const { return LinearAddress(m_address + o); }
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dword get() const { return m_address; }
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void set(dword address) { m_address = address; }
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void mask(dword m) { m_address &= m; }
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bool operator==(const LinearAddress& other) const { return m_address == other.m_address; }
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byte* asPtr() { return reinterpret_cast<byte*>(m_address); }
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const byte* asPtr() const { return reinterpret_cast<const byte*>(m_address); }
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dword pageBase() const { return m_address & 0xfffff000; }
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private:
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dword m_address { 0 };
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};
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