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