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kernel: add KPageTableBase

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Co-authored-by: Kelebek1 <eeeedddccc@hotmail.co.uk>
This commit is contained in:
Liam 2023-10-22 21:16:38 -04:00
parent 2f9487cd38
commit 2a255b2d61
31 changed files with 7202 additions and 4877 deletions
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30
src/common/page_table.cpp
View file

@ -9,12 +9,12 @@ PageTable::PageTable() = default;
PageTable::~PageTable() noexcept = default;
bool PageTable::BeginTraversal(TraversalEntry& out_entry, TraversalContext& out_context,
u64 address) const {
bool PageTable::BeginTraversal(TraversalEntry* out_entry, TraversalContext* out_context,
Common::ProcessAddress address) const {
// Setup invalid defaults.
out_entry.phys_addr = 0;
out_entry.block_size = page_size;
out_context.next_page = 0;
out_entry->phys_addr = 0;
out_entry->block_size = page_size;
out_context->next_page = 0;
// Validate that we can read the actual entry.
const auto page = address / page_size;
@ -29,20 +29,20 @@ bool PageTable::BeginTraversal(TraversalEntry& out_entry, TraversalContext& out_
}
// Populate the results.
out_entry.phys_addr = phys_addr + address;
out_context.next_page = page + 1;
out_context.next_offset = address + page_size;
out_entry->phys_addr = phys_addr + GetInteger(address);
out_context->next_page = page + 1;
out_context->next_offset = GetInteger(address) + page_size;
return true;
}
bool PageTable::ContinueTraversal(TraversalEntry& out_entry, TraversalContext& context) const {
bool PageTable::ContinueTraversal(TraversalEntry* out_entry, TraversalContext* context) const {
// Setup invalid defaults.
out_entry.phys_addr = 0;
out_entry.block_size = page_size;
out_entry->phys_addr = 0;
out_entry->block_size = page_size;
// Validate that we can read the actual entry.
const auto page = context.next_page;
const auto page = context->next_page;
if (page >= backing_addr.size()) {
return false;
}
@ -54,9 +54,9 @@ bool PageTable::ContinueTraversal(TraversalEntry& out_entry, TraversalContext& c
}
// Populate the results.
out_entry.phys_addr = phys_addr + context.next_offset;
context.next_page = page + 1;
context.next_offset += page_size;
out_entry->phys_addr = phys_addr + context->next_offset;
context->next_page = page + 1;
context->next_offset += page_size;
return true;
}

17
src/common/page_table.h
View file

@ -6,6 +6,7 @@
#include <atomic>
#include "common/common_types.h"
#include "common/typed_address.h"
#include "common/virtual_buffer.h"
namespace Common {
@ -100,9 +101,9 @@ struct PageTable {
PageTable(PageTable&&) noexcept = default;
PageTable& operator=(PageTable&&) noexcept = default;
bool BeginTraversal(TraversalEntry& out_entry, TraversalContext& out_context,
u64 address) const;
bool ContinueTraversal(TraversalEntry& out_entry, TraversalContext& context) const;
bool BeginTraversal(TraversalEntry* out_entry, TraversalContext* out_context,
Common::ProcessAddress address) const;
bool ContinueTraversal(TraversalEntry* out_entry, TraversalContext* context) const;
/**
* Resizes the page table to be able to accommodate enough pages within
@ -117,6 +118,16 @@ struct PageTable {
return current_address_space_width_in_bits;
}
bool GetPhysicalAddress(Common::PhysicalAddress* out_phys_addr,
Common::ProcessAddress virt_addr) const {
if (virt_addr > (1ULL << this->GetAddressSpaceBits())) {
return false;
}
*out_phys_addr = backing_addr[virt_addr / page_size] + GetInteger(virt_addr);
return true;
}
/**
* Vector of memory pointers backing each page. An entry can only be non-null if the
* corresponding attribute element is of type `Memory`.