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#pragma once
#include "core/types.hpp"
#define PAGING_MAX_PAGE (20*512)
/**
* Current number of page (from the beginning of the ram) used by the kernel that
* should not be used by the paging allocation mechanism and should not be granted
* for allocation
*/
#define PAGING_KERNEL_USED_PAGE (2*512)
/// @brief New number of page reachable at the end of the paging_enable() call
#define PAGING_KERNEL_SPACE_MAX_PAGE (20*512)
#define PAGING_ALLOCATE() paging_allocate_contiguous(1)
#define PAGING_OPT_P 1
#define PAGING_OPT_RW (1<<1)
#define PAGING_OPT_PCD (1<<3)
/// @brief Get page address that contain addr
#define PAGE(addr) (addr&(~(0xFFF)))
#define PAGING_MAP(addr) paging_allocate_addr(kpages[0],(u64)(addr),(u64)(addr),PAGING_OPT_P|PAGING_OPT_RW,kernel_vma)
#define MAX_TABLES 280
/// @brief All PAE table structures are allocated here
extern u64 kpages[MAX_TABLES][512];
/// cf boucane.hpp
extern u64 kernel_vma,stack_pma,userspace_pma;
/**
* Setup and enable PAE paging
*/
void paging_enable();
/**
* Allocate the next available page
* and return its physical address
*/
u64* paging_allocate_contiguous(int npages);
/**
* Deallocate a page located at addr
*/
void paging_deallocate(u64 addr);
/**
* Dump a specific range of bytes in the paging_status
*/
void paging_dump(int min, int max);
/**
* Deallocate all the pages linked to a pml4
*/
void paging_deallocate_pml4(u64* pml4);
/**
* Deallocate all the pages related to a pml4 structure
*/
void paging_deallocate_table(u64* table);
/**
* Allocate table structure (pml4, pdp etc..)
*/
u64* paging_allocate_table_local();
/**
* Map virtual page associated to virt
* to the physical page associated with phy
* Offset can be used to convert pml4_table address
* content to virtual addresses (since physical addresses from the pml4_table are not
* available after the trampoline into High-Half memory)
*/
void paging_allocate_addr(u64* pml4_table,u64 virt, u64 phy, u16 options, u64 offset);
/**
* Get associated physical address
*/
u64 paging_as_phy(u64* pml4_table, u64 virt);
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