cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

dma.c (1154B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  linux/arch/arm/kernel/dma-ebsa285.c
      4 *
      5 *  Copyright (C) 1998 Phil Blundell
      6 *
      7 * DMA functions specific to EBSA-285/CATS architectures
      8 *
      9 *  Changelog:
     10 *   09-Nov-1998 RMK	Split out ISA DMA functions to dma-isa.c
     11 *   17-Mar-1999 RMK	Allow any EBSA285-like architecture to have
     12 *			ISA DMA controllers.
     13 */
     14#include <linux/init.h>
     15#include <linux/io.h>
     16#include <linux/spinlock.h>
     17#include <linux/scatterlist.h>
     18
     19#include <asm/dma.h>
     20
     21#include <asm/mach/dma.h>
     22#include <asm/hardware/dec21285.h>
     23
     24#if 0
     25static int fb_dma_request(unsigned int chan, dma_t *dma)
     26{
     27	return -EINVAL;
     28}
     29
     30static void fb_dma_enable(unsigned int chan, dma_t *dma)
     31{
     32}
     33
     34static void fb_dma_disable(unsigned int chan, dma_t *dma)
     35{
     36}
     37
     38static struct dma_ops fb_dma_ops = {
     39	.type		= "fb",
     40	.request	= fb_dma_request,
     41	.enable		= fb_dma_enable,
     42	.disable	= fb_dma_disable,
     43};
     44#endif
     45
     46static int __init fb_dma_init(void)
     47{
     48#if 0
     49	dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
     50	dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
     51#endif
     52#ifdef CONFIG_ISA_DMA
     53	if (footbridge_cfn_mode())
     54		isa_init_dma();
     55#endif
     56	return 0;
     57}
     58core_initcall(fb_dma_init);