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hardware_samsung/exynos4/hal/libump/include/ump/ump_ref_drv.h

66 lines
2.2 KiB

/*
* Copyright (C) 2010 ARM Limited. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file ump_ref_drv.h
*
* Reference driver extensions to the UMP user space API for allocating UMP memory
*/
#ifndef _UNIFIED_MEMORY_PROVIDER_REF_DRV_H_
#define _UNIFIED_MEMORY_PROVIDER_REF_DRV_H_
#include "ump.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum
{
/* This enum must match with the IOCTL enum in ump_ioctl.h */
UMP_REF_DRV_CONSTRAINT_NONE = 0,
UMP_REF_DRV_CONSTRAINT_PHYSICALLY_LINEAR = 1,
UMP_REF_DRV_CONSTRAINT_USE_CACHE = 4,
} ump_alloc_constraints;
/** Allocate an UMP handle containing a memory buffer.
* Input: Size: The minimum size for the allocation.
* Usage: If this is UMP_REF_DRV_CONSTRAINT_USE_CACHE, the allocation is mapped as cached by the cpu.
* If it is UMP_REF_DRV_CONSTRAINT_NONE it is mapped as noncached.
* The flag UMP_REF_DRV_CONSTRAINT_PHYSICALLY_LINEAR is not supported.*/
UMP_API_EXPORT ump_handle ump_ref_drv_allocate(unsigned long size, ump_alloc_constraints usage);
typedef enum
{
UMP_MSYNC_CLEAN = 0 ,
UMP_MSYNC_CLEAN_AND_INVALIDATE = 1,
UMP_MSYNC_READOUT_CACHE_ENABLED = 128,
} ump_cpu_msync_op;
/** Flushing cache for an ump_handle.
* The function will always CLEAN_AND_INVALIDATE as long as the \a op is not UMP_MSYNC_READOUT_CACHE_ENABLED.
* If so it will only report back if the given ump_handle is cacheable.
* At the momement the implementation does not use \a address or \a size.
* Return value is 1 if cache is enabled, and 0 if it is disabled for the given allocation.*/
UMP_API_EXPORT int ump_cpu_msync_now(ump_handle mem, ump_cpu_msync_op op, void* address, int size);
#ifdef __cplusplus
}
#endif
#endif /*_UNIFIED_MEMORY_PROVIDER_REF_DRV_H_ */