L4Re Operating System Framework
Interface and Usage Documentation
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dma_space.h
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1
5/*
6 * (c) 2014 Alexander Warg <alexander.warg@kernkonzept.com>
7 *
8 * This file is part of TUD:OS and distributed under the terms of the
9 * GNU General Public License 2.
10 * Please see the COPYING-GPL-2 file for details.
11 *
12 * As a special exception, you may use this file as part of a free software
13 * library without restriction. Specifically, if other files instantiate
14 * templates or use macros or inline functions from this file, or you compile
15 * this file and link it with other files to produce an executable, this
16 * file does not by itself cause the resulting executable to be covered by
17 * the GNU General Public License. This exception does not however
18 * invalidate any other reasons why the executable file might be covered by
19 * the GNU General Public License.
20 */
21#pragma once
22
29#include <l4/sys/types.h>
30#include <l4/re/c/dataspace.h>
31
33
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60
63
70L4_CV long
72 l4re_ds_offset_t offset,
73 l4_size_t * size, unsigned long attrs,
76
77
84L4_CV long
86 l4_size_t size, unsigned long attrs,
88
95L4_CV long
97 unsigned long attr) L4_NOTHROW;
98
105L4_CV long
107
108
Data space C interface.
l4_uint64_t l4re_dma_space_dma_addr_t
Data type for DMA addresses.
Definition dma_space.h:62
l4re_dma_space_direction
Direction of the DMA transfers.
Definition dma_space.h:38
@ L4RE_DMA_SPACE_BIDIRECTIONAL
device reads and writes to the memory
Definition dma_space.h:39
@ L4RE_DMA_SPACE_NONE
device is coherently connected
Definition dma_space.h:42
@ L4RE_DMA_SPACE_TO_DEVICE
device reads the memory
Definition dma_space.h:40
@ L4RE_DMA_SPACE_FROM_DEVICE
device writes to the memory
Definition dma_space.h:41
l4re_dma_space_space_attribs
Attributes assigned to the DMA space when associated with a specific device.
Definition dma_space.h:49
@ L4RE_DMA_SPACE_PHYS_SPACE
The DMA space has no DMA task assigned and uses the CPUs physical memory.
Definition dma_space.h:51
@ L4RE_DMA_SPACE_COHERENT
The device is connected coherently with the cache.
Definition dma_space.h:50
long l4re_dma_space_disassociate(l4re_dma_space_t dma)
Disassociate the (kernel) DMA space from this Dma_space.
long l4re_dma_space_unmap(l4re_dma_space_t dma, l4re_dma_space_dma_addr_t dma_addr, l4_size_t size, unsigned long attrs, enum l4re_dma_space_direction dir) L4_NOTHROW
Unmap the given part of this data space from the DMA address space.
l4_cap_idx_t l4re_dma_space_t
DMA space capability type.
Definition dma_space.h:59
long l4re_dma_space_associate(l4re_dma_space_t dma, l4_cap_idx_t dma_task, unsigned long attr) L4_NOTHROW
Associate a (kernel) DMA space for a device to this Dma_space.
long l4re_dma_space_map(l4re_dma_space_t dma, l4re_ds_t src, l4re_ds_offset_t offset, l4_size_t *size, unsigned long attrs, enum l4re_dma_space_direction dir, l4re_dma_space_dma_addr_t *dma_addr) L4_NOTHROW
Map the given part of this data space into the DMA address space.
l4_cap_idx_t l4re_ds_t
Dataspace type.
Definition dataspace.h:39
unsigned int l4_size_t
Unsigned size type.
Definition l4int.h:35
unsigned long long l4_uint64_t
Unsigned 64bit value.
Definition l4int.h:42
unsigned long l4_cap_idx_t
Capability selector type.
Definition types.h:359
#define L4_CV
Define calling convention.
Definition linkage.h:44
#define L4_NOTHROW
Mark a function declaration and definition as never throwing an exception.
Definition compiler.h:188
#define EXTERN_C_BEGIN
Start section with C types and functions.
Definition compiler.h:192
#define EXTERN_C_END
End section with C types and functions.
Definition compiler.h:193
Common L4 ABI Data Types.