67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
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/*
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* Copyright (C) 2010-2011 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_KERNEL_MEM_MMU_H__
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#define __MALI_KERNEL_MEM_MMU_H__
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#include "mali_kernel_session_manager.h"
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/**
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* Lookup a MMU core by ID.
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* @param id ID of the MMU to find
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* @return NULL if ID not found or valid, non-NULL if a core was found.
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*/
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void* mali_memory_core_mmu_lookup(u32 id);
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/**
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* Activate a user session with its address space on the given MMU.
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* If the session can't be activated due to that the MMU is busy and
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* a callback pointer is given, the callback will be called once the MMU becomes idle.
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* If the same callback pointer is registered multiple time it will only be called once.
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* Nested activations are supported.
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* Each call must be matched by a call to @see mali_memory_core_mmu_release_address_space_reference
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*
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* @param mmu The MMU to activate the address space on
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* @param mali_session_data The user session object which address space to activate
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* @param callback Pointer to the function to call when the MMU becomes idle
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* @param callback_arg Argument given to the callback
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* @return 0 if the address space was activated, -EBUSY if the MMU was busy, -EFAULT in all other cases.
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*/
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int mali_memory_core_mmu_activate_page_table(void* mmu_ptr, struct mali_session_data * mali_session_data, void(*callback)(void*), void * callback_argument);
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/**
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* Release a reference to the current active address space.
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* Once the last reference is released any callback(s) registered will be called before the function returns
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*
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* @note Caution must be shown calling this function with locks held due to that callback can be called
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* @param mmu The mmu to release a reference to the active address space of
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*/
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void mali_memory_core_mmu_release_address_space_reference(void* mmu);
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/**
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* Soft reset of MMU - needed after power up
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*
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* @param mmu_ptr The MMU pointer registered with the relevant core
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*/
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void mali_kernel_mmu_reset(void * mmu_ptr);
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void mali_kernel_mmu_force_bus_reset(void * mmu_ptr);
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/**
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* Unregister a previously registered callback.
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* @param mmu The MMU to unregister the callback on
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* @param callback The function to unregister
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*/
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void mali_memory_core_mmu_unregister_callback(void* mmu, void(*callback)(void*));
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#endif /* __MALI_KERNEL_MEM_MMU_H__ */
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