73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
#pragma once
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#include <glacier/container/linked_list.h>
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#include <glacier/memory/ref_ptr.h>
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#include <glacier/status/error_or.h>
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#include "include/ztypes.h"
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#include "object/kernel_object.h"
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class MemoryObject;
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template <>
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struct KernelObjectTag<MemoryObject> {
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static const uint64_t type = KernelObject::MEMORY_OBJECT;
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};
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/*
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* MemoryObject is a page-aligned set of memory that corresponds
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* to physical pages.
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*
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* It can be mapped in to one or more address spaces.
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* */
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class MemoryObject : public KernelObject {
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public:
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uint64_t TypeTag() override { return KernelObject::MEMORY_OBJECT; }
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static uint64_t DefaultPermissions() {
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return kZionPerm_Write | kZionPerm_Read | kZionPerm_Duplicate |
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kZionPerm_Transmit;
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}
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MemoryObject(uint64_t size);
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uint64_t size() { return size_; }
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uint64_t num_pages() { return size_ / 0x1000; }
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uint64_t PhysicalPageAtOffset(uint64_t offset);
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void CopyBytesToObject(uint64_t source, uint64_t length);
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virtual glcr::ErrorOr<glcr::RefPtr<MemoryObject>> Duplicate(uint64_t offset,
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uint64_t length) {
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return glcr::UNIMPLEMENTED;
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}
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protected:
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// Hacky to avoid linked_list creation.
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MemoryObject(uint64_t size, bool) : size_(size) {}
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private:
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// Always stores the full page-aligned size.
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uint64_t size_;
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virtual uint64_t PageNumberToPhysAddr(uint64_t page_num);
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glcr::LinkedList<uint64_t> phys_page_list_;
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};
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class FixedMemoryObject : public MemoryObject {
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public:
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// FIXME: Validate that this is 4k aligned.
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FixedMemoryObject(uint64_t physical_addr, uint64_t size)
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: MemoryObject(size, true), physical_addr_(physical_addr) {}
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virtual glcr::ErrorOr<glcr::RefPtr<MemoryObject>> Duplicate(
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uint64_t offset, uint64_t length) override;
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private:
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uint64_t physical_addr_;
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uint64_t PageNumberToPhysAddr(uint64_t page_num) override {
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return physical_addr_ + (0x1000 * page_num);
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}
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};
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