mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-19 04:25:22 +00:00
ebba3bf38b
This patch adds a driver for a Synopsys DesignWare Ethernet MAC. The driver uses interrupts to handle received frames, but it uses a spinloop when transmitting to wait for the transmit descriptor to become available. Transmission is coordinated by a fiber, so this should not result in the system execution being blocked. Only a single descriptor is allocated for each of the transmit and receive directions to save memory and simplify the code. Another simplification is that none of the offload capabilities of the Ethernet device are used. The driver currently only supports a single instance of the Ethernet MAC, which is consistent with the limitation in the network stack that only a single network device is supported. Change-Id: I013b3d439a76e8ff91a775516f7035841b040870 Signed-off-by: Michael LeMay <michael.lemay@intel.com>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/* util.h - misc utilities */
|
|
|
|
/*
|
|
* Copyright (c) 2011-2014, Wind River Systems, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* DESCRIPTION
|
|
* Misc utilities usable by nanokernel, microkernel, and application code.
|
|
*/
|
|
|
|
#ifndef _UTIL__H_
|
|
#define _UTIL__H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifndef _ASMLANGUAGE
|
|
|
|
/* Helper to pass a int as a pointer or vice-versa.
|
|
* Those are available for 32 bits architectures:
|
|
*/
|
|
#define POINTER_TO_UINT(x) ((uint32_t) (x))
|
|
#define UINT_TO_POINTER(x) ((void *) (x))
|
|
#define POINTER_TO_INT(x) ((int32_t) (x))
|
|
#define INT_TO_POINTER(x) ((void *) (x))
|
|
|
|
#define ARRAY_SIZE(array) ((unsigned long)(sizeof(array) / sizeof((array)[0])))
|
|
#define CONTAINER_OF(ptr, type, field) \
|
|
((type *)(((char *)(ptr)) - offsetof(type, field)))
|
|
|
|
/* round "x" up/down to next multiple of "align" (which must be a power of 2) */
|
|
#define ROUND_UP(x, align) \
|
|
(((unsigned long)(x) + ((unsigned long)align - 1)) & \
|
|
~((unsigned long)align - 1))
|
|
#define ROUND_DOWN(x, align) ((unsigned long)(x) & ~((unsigned long)align - 1))
|
|
|
|
#ifdef INLINED
|
|
#define INLINE inline
|
|
#else
|
|
#define INLINE
|
|
#endif
|
|
|
|
#ifndef max
|
|
#define max(a, b) (((a) > (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
#ifndef min
|
|
#define min(a, b) (((a) < (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
static inline int is_power_of_two(unsigned int x)
|
|
{
|
|
return (x != 0) && !(x & (x - 1));
|
|
}
|
|
#endif /* !_ASMLANGUAGE */
|
|
|
|
/* KB, MB, GB */
|
|
#define KB(x) ((x) << 10)
|
|
#define MB(x) (KB(x) << 10)
|
|
#define GB(x) (MB(x) << 10)
|
|
|
|
/* KHZ, MHZ */
|
|
#define KHZ(x) ((x) * 1000)
|
|
#define MHZ(x) (KHZ(x) * 1000)
|
|
|
|
#define BIT(n) (1UL << (n))
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _UTIL__H_ */
|