pfifo.h

来自「linux 内核源代码」· C头文件 代码 · 共 55 行

/*
 * include/asm-arm/arch-netx/pfifo.h
 *
 * Copyright (c) 2005 Sascha Hauer <[e-mail]>, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#ifndef ASM_ARCH_PFIFO_H
#define ASM_ARCH_PFIFO_H

static inline int pfifo_push(int no, unsigned int pointer)
{
	writel(pointer, NETX_PFIFO_BASE(no));
	return 0;
}

static inline unsigned int pfifo_pop(int no)
{
	return readl(NETX_PFIFO_BASE(no));
}

static inline int pfifo_fill_level(int no)
{

	return readl(NETX_PFIFO_FILL_LEVEL(no));
}

static inline int pfifo_full(int no)
{
	return readl(NETX_PFIFO_FULL) & (1<<no) ? 1 : 0;
}

static inline int pfifo_empty(int no)
{
	return readl(NETX_PFIFO_EMPTY) & (1<<no) ? 1 : 0;
}

int pfifo_request(unsigned int pfifo_mask);
void pfifo_free(unsigned int pfifo_mask);

#endif /* ASM_ARCH_PFIFO_H */