cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dma_v.h (1215B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright 2002 Integrated Device Technology, Inc.
      4 *		All rights reserved.
      5 *
      6 * DMA register definition.
      7 *
      8 * Author : ryan.holmQVist@idt.com
      9 * Date	  : 20011005
     10 */
     11
     12#ifndef _ASM_RC32434_DMA_V_H_
     13#define _ASM_RC32434_DMA_V_H_
     14
     15#include  <asm/mach-rc32434/dma.h>
     16#include  <asm/mach-rc32434/rc32434.h>
     17
     18#define DMA_CHAN_OFFSET		0x14
     19#define IS_DMA_USED(X)		(((X) & \
     20				(DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \
     21				!= 0)
     22#define DMA_COUNT(count)	((count) & DMA_DESC_COUNT_MSK)
     23
     24#define DMA_HALT_TIMEOUT	500
     25
     26static inline int rc32434_halt_dma(struct dma_reg *ch)
     27{
     28	int timeout = 1;
     29	if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
     30		__raw_writel(0, &ch->dmac);
     31		for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
     32			if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) {
     33				__raw_writel(0, &ch->dmas);
     34				break;
     35			}
     36		}
     37	}
     38
     39	return timeout ? 0 : 1;
     40}
     41
     42static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr)
     43{
     44	__raw_writel(0, &ch->dmandptr);
     45	__raw_writel(dma_addr, &ch->dmadptr);
     46}
     47
     48static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr)
     49{
     50	__raw_writel(dma_addr, &ch->dmandptr);
     51}
     52
     53#endif	/* _ASM_RC32434_DMA_V_H_ */