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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g98.c (2283B)

      1/*
      2 * Copyright 2013 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 "nv50.h"
     25
     26#include <subdev/bios.h>
     27#include <subdev/bios/init.h>
     28
     29static u64
     30g98_devinit_disable(struct nvkm_devinit *init)
     31{
     32	struct nvkm_device *device = init->subdev.device;
     33	u32 r001540 = nvkm_rd32(device, 0x001540);
     34	u32 r00154c = nvkm_rd32(device, 0x00154c);
     35
     36	if (!(r001540 & 0x40000000)) {
     37		nvkm_subdev_disable(device, NVKM_ENGINE_MSPDEC, 0);
     38		nvkm_subdev_disable(device, NVKM_ENGINE_MSVLD, 0);
     39		nvkm_subdev_disable(device, NVKM_ENGINE_MSPPP, 0);
     40	}
     41
     42	if (!(r00154c & 0x00000004))
     43		nvkm_subdev_disable(device, NVKM_ENGINE_DISP, 0);
     44	if (!(r00154c & 0x00000020))
     45		nvkm_subdev_disable(device, NVKM_ENGINE_MSVLD, 0);
     46	if (!(r00154c & 0x00000040))
     47		nvkm_subdev_disable(device, NVKM_ENGINE_SEC, 0);
     48
     49	return 0ULL;
     50}
     51
     52static const struct nvkm_devinit_func
     53g98_devinit = {
     54	.preinit = nv50_devinit_preinit,
     55	.init = nv50_devinit_init,
     56	.post = nv04_devinit_post,
     57	.pll_set = nv50_devinit_pll_set,
     58	.disable = g98_devinit_disable,
     59};
     60
     61int
     62g98_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     63		struct nvkm_devinit **pinit)
     64{
     65	return nv50_devinit_new_(&g98_devinit, device, type, inst, pinit);
     66}