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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __DEVICE_MMIO_H__
#define __DEVICE_MMIO_H__
#include <arch/mmio.h>
#include <endian.h>
#include <types.h>
#ifndef __ROMCC__
/*
* Reads a transfer buffer from 32-bit FIFO registers. fifo_stride is the
* distance in bytes between registers (e.g. pass 4 for a normal array of 32-bit
* registers or 0 to read everything from the same register). fifo_width is
* the amount of bytes read per register (can be 1 through 4).
*/
void buffer_from_fifo32(void *buffer, size_t size, void *fifo,
int fifo_stride, int fifo_width);
/*
* Version of buffer_to_fifo32() that can prepend a prefix of up to fifo_width
* size to the transfer. This is often useful for protocols where a command word
* precedes the actual payload data. The prefix must be packed in the low-order
* bytes of the 'prefix' u32 parameter and any high-order bytes exceeding prefsz
* must be 0. Note that 'size' counts total bytes written, including 'prefsz'.
*/
void buffer_to_fifo32_prefix(void *buffer, u32 prefix, int prefsz, size_t size,
void *fifo, int fifo_stride, int fifo_width);
/*
* Writes a transfer buffer into 32-bit FIFO registers. fifo_stride is the
* distance in bytes between registers (e.g. pass 4 for a normal array of 32-bit
* registers or 0 to write everything into the same register). fifo_width is
* the amount of bytes written per register (can be 1 through 4).
*/
static inline void buffer_to_fifo32(void *buffer, size_t size, void *fifo,
int fifo_stride, int fifo_width)
{
buffer_to_fifo32_prefix(buffer, size, 0, 0, fifo,
fifo_stride, fifo_width);
}
#endif /* !__ROMCC__ */
#endif /* __DEVICE_MMIO_H__ */
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