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

g94.c (2407B)

      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 "priv.h"
     25#include "pad.h"
     26
     27void
     28g94_aux_stat(struct nvkm_i2c *i2c, u32 *hi, u32 *lo, u32 *rq, u32 *tx)
     29{
     30	struct nvkm_device *device = i2c->subdev.device;
     31	u32 intr = nvkm_rd32(device, 0x00e06c);
     32	u32 stat = nvkm_rd32(device, 0x00e068) & intr, i;
     33	for (i = 0, *hi = *lo = *rq = *tx = 0; i < 8; i++) {
     34		if ((stat & (1 << (i * 4)))) *hi |= 1 << i;
     35		if ((stat & (2 << (i * 4)))) *lo |= 1 << i;
     36		if ((stat & (4 << (i * 4)))) *rq |= 1 << i;
     37		if ((stat & (8 << (i * 4)))) *tx |= 1 << i;
     38	}
     39	nvkm_wr32(device, 0x00e06c, intr);
     40}
     41
     42void
     43g94_aux_mask(struct nvkm_i2c *i2c, u32 type, u32 mask, u32 data)
     44{
     45	struct nvkm_device *device = i2c->subdev.device;
     46	u32 temp = nvkm_rd32(device, 0x00e068), i;
     47	for (i = 0; i < 8; i++) {
     48		if (mask & (1 << i)) {
     49			if (!(data & (1 << i))) {
     50				temp &= ~(type << (i * 4));
     51				continue;
     52			}
     53			temp |= type << (i * 4);
     54		}
     55	}
     56	nvkm_wr32(device, 0x00e068, temp);
     57}
     58
     59static const struct nvkm_i2c_func
     60g94_i2c = {
     61	.pad_x_new = g94_i2c_pad_x_new,
     62	.pad_s_new = g94_i2c_pad_s_new,
     63	.aux = 4,
     64	.aux_stat = g94_aux_stat,
     65	.aux_mask = g94_aux_mask,
     66};
     67
     68int
     69g94_i2c_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     70	    struct nvkm_i2c **pi2c)
     71{
     72	return nvkm_i2c_new_(&g94_i2c, device, type, inst, pi2c);
     73}