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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ipa_reg.c (797B)


      1// SPDX-License-Identifier: GPL-2.0
      2
      3/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
      4 * Copyright (C) 2019-2020 Linaro Ltd.
      5 */
      6
      7#include <linux/io.h>
      8
      9#include "ipa.h"
     10#include "ipa_reg.h"
     11
     12int ipa_reg_init(struct ipa *ipa)
     13{
     14	struct device *dev = &ipa->pdev->dev;
     15	struct resource *res;
     16
     17	/* Setup IPA register memory  */
     18	res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
     19					   "ipa-reg");
     20	if (!res) {
     21		dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
     22		return -ENODEV;
     23	}
     24
     25	ipa->reg_virt = ioremap(res->start, resource_size(res));
     26	if (!ipa->reg_virt) {
     27		dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
     28		return -ENOMEM;
     29	}
     30	ipa->reg_addr = res->start;
     31
     32	return 0;
     33}
     34
     35void ipa_reg_exit(struct ipa *ipa)
     36{
     37	iounmap(ipa->reg_virt);
     38}