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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hdagt215.c (1866B)

      1/*
      2 * Copyright 2012 Red Hat Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: Ben Skeggs
     23 */
     24#include "ior.h"
     25
     26void
     27gt215_hda_eld(struct nvkm_ior *ior, int head, u8 *data, u8 size)
     28{
     29	struct nvkm_device *device = ior->disp->engine.subdev.device;
     30	const u32 soff = ior->id * 0x800;
     31	int i;
     32
     33	for (i = 0; i < size; i++)
     34		nvkm_wr32(device, 0x61c440 + soff, (i << 8) | data[i]);
     35	for (; i < 0x60; i++)
     36		nvkm_wr32(device, 0x61c440 + soff, (i << 8));
     37	nvkm_mask(device, 0x61c448 + soff, 0x80000002, 0x80000002);
     38}
     39
     40void
     41gt215_hda_hpd(struct nvkm_ior *ior, int head, bool present)
     42{
     43	struct nvkm_device *device = ior->disp->engine.subdev.device;
     44	u32 data = 0x80000000;
     45	u32 mask = 0x80000001;
     46	if (present)
     47		data |= 0x00000001;
     48	else
     49		mask |= 0x00000002;
     50	nvkm_mask(device, 0x61c448 + ior->id * 0x800, mask, data);
     51}