| /* |
| * Copyright (C) 2011-2012 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. |
| * |
| * A copy of the licence is included with the program, and can also be obtained from Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __MALI_MMU_PAGE_DIRECTORY_H__ |
| #define __MALI_MMU_PAGE_DIRECTORY_H__ |
| |
| #include "mali_osk.h" |
| |
| /** |
| * Size of an MMU page in bytes |
| */ |
| #define MALI_MMU_PAGE_SIZE 0x1000 |
| |
| /* |
| * Size of the address space referenced by a page table page |
| */ |
| #define MALI_MMU_VIRTUAL_PAGE_SIZE 0x400000 /* 4 MiB */ |
| |
| /** |
| * Page directory index from address |
| * Calculates the page directory index from the given address |
| */ |
| #define MALI_MMU_PDE_ENTRY(address) (((address)>>22) & 0x03FF) |
| |
| /** |
| * Page table index from address |
| * Calculates the page table index from the given address |
| */ |
| #define MALI_MMU_PTE_ENTRY(address) (((address)>>12) & 0x03FF) |
| |
| /** |
| * Extract the memory address from an PDE/PTE entry |
| */ |
| #define MALI_MMU_ENTRY_ADDRESS(value) ((value) & 0xFFFFFC00) |
| |
| #define MALI_INVALID_PAGE ((u32)(~0)) |
| |
| /** |
| * |
| */ |
| typedef enum mali_mmu_entry_flags |
| { |
| MALI_MMU_FLAGS_PRESENT = 0x01, |
| MALI_MMU_FLAGS_READ_PERMISSION = 0x02, |
| MALI_MMU_FLAGS_WRITE_PERMISSION = 0x04, |
| MALI_MMU_FLAGS_MASK = 0x07 |
| } mali_mmu_entry_flags; |
| |
| |
| struct mali_page_directory |
| { |
| u32 page_directory; /**< Physical address of the memory session's page directory */ |
| mali_io_address page_directory_mapped; /**< Pointer to the mapped version of the page directory into the kernel's address space */ |
| |
| 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 */ |
| u32 page_entries_usage_count[1024]; /**< Tracks usage count of the page table pages, so they can be releases on the last reference */ |
| }; |
| |
| /* Map Mali virtual address space (i.e. ensure page tables exist for the virtual range) */ |
| _mali_osk_errcode_t mali_mmu_pagedir_map(struct mali_page_directory *pagedir, u32 mali_address, u32 size); |
| _mali_osk_errcode_t mali_mmu_pagedir_unmap(struct mali_page_directory *pagedir, u32 mali_address, u32 size); |
| |
| /* Back virtual address space with actual pages. Assumes input is contiguous and 4k aligned. */ |
| void mali_mmu_pagedir_update(struct mali_page_directory *pagedir, u32 mali_address, u32 phys_address, u32 size); |
| |
| u32 mali_page_directory_get_phys_address(struct mali_page_directory *pagedir, u32 index); |
| |
| u32 mali_allocate_empty_page(void); |
| void mali_free_empty_page(u32 address); |
| _mali_osk_errcode_t mali_create_fault_flush_pages(u32 *page_directory, u32 *page_table, u32 *data_page); |
| void mali_destroy_fault_flush_pages(u32 *page_directory, u32 *page_table, u32 *data_page); |
| |
| struct mali_page_directory *mali_mmu_pagedir_alloc(void); |
| void mali_mmu_pagedir_free(struct mali_page_directory *pagedir); |
| |
| #endif /* __MALI_MMU_PAGE_DIRECTORY_H__ */ |