/*
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* Copyright (C) 2011-2014, 2016-2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __MALI_MMU_PAGE_DIRECTORY_H__
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#define __MALI_MMU_PAGE_DIRECTORY_H__
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#include "mali_osk.h"
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/**
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* Size of an MMU page in bytes
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*/
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#define MALI_MMU_PAGE_SIZE 0x1000
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/*
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* Size of the address space referenced by a page table page
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*/
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#define MALI_MMU_VIRTUAL_PAGE_SIZE 0x400000 /* 4 MiB */
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/**
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* Page directory index from address
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* Calculates the page directory index from the given address
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*/
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#define MALI_MMU_PDE_ENTRY(address) (((address)>>22) & 0x03FF)
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/**
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* Page table index from address
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* Calculates the page table index from the given address
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*/
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#define MALI_MMU_PTE_ENTRY(address) (((address)>>12) & 0x03FF)
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/**
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* Extract the memory address from an PDE/PTE entry
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*/
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#define MALI_MMU_ENTRY_ADDRESS(value) ((value) & 0xFFFFFC00)
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#define MALI_INVALID_PAGE ((u32)(~0))
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/**
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*
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*/
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typedef enum mali_mmu_entry_flags {
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MALI_MMU_FLAGS_PRESENT = 0x01,
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MALI_MMU_FLAGS_READ_PERMISSION = 0x02,
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MALI_MMU_FLAGS_WRITE_PERMISSION = 0x04,
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MALI_MMU_FLAGS_OVERRIDE_CACHE = 0x8,
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MALI_MMU_FLAGS_WRITE_CACHEABLE = 0x10,
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MALI_MMU_FLAGS_WRITE_ALLOCATE = 0x20,
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MALI_MMU_FLAGS_WRITE_BUFFERABLE = 0x40,
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MALI_MMU_FLAGS_READ_CACHEABLE = 0x80,
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MALI_MMU_FLAGS_READ_ALLOCATE = 0x100,
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MALI_MMU_FLAGS_MASK = 0x1FF,
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} mali_mmu_entry_flags;
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#define MALI_MMU_FLAGS_FORCE_GP_READ_ALLOCATE ( \
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MALI_MMU_FLAGS_PRESENT | \
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MALI_MMU_FLAGS_READ_PERMISSION | \
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MALI_MMU_FLAGS_WRITE_PERMISSION | \
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MALI_MMU_FLAGS_OVERRIDE_CACHE | \
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MALI_MMU_FLAGS_WRITE_CACHEABLE | \
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MALI_MMU_FLAGS_WRITE_BUFFERABLE | \
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MALI_MMU_FLAGS_READ_CACHEABLE | \
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MALI_MMU_FLAGS_READ_ALLOCATE )
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#define MALI_MMU_FLAGS_DEFAULT ( \
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MALI_MMU_FLAGS_PRESENT | \
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MALI_MMU_FLAGS_READ_PERMISSION | \
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MALI_MMU_FLAGS_WRITE_PERMISSION )
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struct mali_page_directory {
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u32 page_directory; /**< Physical address of the memory session's page directory */
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mali_io_address page_directory_mapped; /**< Pointer to the mapped version of the page directory into the kernel's address space */
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mali_io_address page_entries_mapped[1024]; /**< Pointers to the page tables which exists in the page directory mapped into the kernel's address space */
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u32 page_entries_usage_count[1024]; /**< Tracks usage count of the page table pages, so they can be releases on the last reference */
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};
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/* Map Mali virtual address space (i.e. ensure page tables exist for the virtual range) */
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_mali_osk_errcode_t mali_mmu_pagedir_map(struct mali_page_directory *pagedir, u32 mali_address, u32 size);
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_mali_osk_errcode_t mali_mmu_pagedir_unmap(struct mali_page_directory *pagedir, u32 mali_address, u32 size);
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/* Back virtual address space with actual pages. Assumes input is contiguous and 4k aligned. */
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void mali_mmu_pagedir_update(struct mali_page_directory *pagedir, u32 mali_address,
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mali_dma_addr phys_address, u32 size, u32 permission_bits);
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u32 mali_allocate_empty_page(mali_io_address *virtual);
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void mali_free_empty_page(mali_dma_addr address, mali_io_address virt_addr);
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_mali_osk_errcode_t mali_create_fault_flush_pages(mali_dma_addr *page_directory,
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mali_io_address *page_directory_mapping,
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mali_dma_addr *page_table, mali_io_address *page_table_mapping,
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mali_dma_addr *data_page, mali_io_address *data_page_mapping);
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void mali_destroy_fault_flush_pages(
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mali_dma_addr *page_directory, mali_io_address *page_directory_mapping,
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mali_dma_addr *page_table, mali_io_address *page_table_mapping,
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mali_dma_addr *data_page, mali_io_address *data_page_mapping);
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struct mali_page_directory *mali_mmu_pagedir_alloc(void);
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void mali_mmu_pagedir_free(struct mali_page_directory *pagedir);
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void mali_mmu_pagedir_diag(struct mali_page_directory *pagedir, u32 fault_addr);
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#endif /* __MALI_MMU_PAGE_DIRECTORY_H__ */
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