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

M0205.c (3626B)

      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 <subdev/bios.h>
     25#include <subdev/bios/bit.h>
     26#include <subdev/bios/M0205.h>
     27
     28u32
     29nvbios_M0205Te(struct nvkm_bios *bios,
     30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
     31{
     32	struct bit_entry bit_M;
     33	u32 data = 0x00000000;
     34
     35	if (!bit_entry(bios, 'M', &bit_M)) {
     36		if (bit_M.version == 2 && bit_M.length > 0x08)
     37			data = nvbios_rd32(bios, bit_M.offset + 0x05);
     38		if (data) {
     39			*ver = nvbios_rd08(bios, data + 0x00);
     40			switch (*ver) {
     41			case 0x10:
     42				*hdr = nvbios_rd08(bios, data + 0x01);
     43				*len = nvbios_rd08(bios, data + 0x02);
     44				*ssz = nvbios_rd08(bios, data + 0x03);
     45				*snr = nvbios_rd08(bios, data + 0x04);
     46				*cnt = nvbios_rd08(bios, data + 0x05);
     47				return data;
     48			default:
     49				break;
     50			}
     51		}
     52	}
     53
     54	return 0x00000000;
     55}
     56
     57u32
     58nvbios_M0205Tp(struct nvkm_bios *bios,
     59	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
     60	       struct nvbios_M0205T *info)
     61{
     62	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
     63	memset(info, 0x00, sizeof(*info));
     64	switch (!!data * *ver) {
     65	case 0x10:
     66		info->freq = nvbios_rd16(bios, data + 0x06);
     67		break;
     68	default:
     69		break;
     70	}
     71	return data;
     72}
     73
     74u32
     75nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
     76	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     77{
     78	u8  snr, ssz;
     79	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
     80	if (data && idx < *cnt) {
     81		data = data + *hdr + idx * (*len + (snr * ssz));
     82		*hdr = *len;
     83		*cnt = snr;
     84		*len = ssz;
     85		return data;
     86	}
     87	return 0x00000000;
     88}
     89
     90u32
     91nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
     92	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
     93	       struct nvbios_M0205E *info)
     94{
     95	u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
     96	memset(info, 0x00, sizeof(*info));
     97	switch (!!data * *ver) {
     98	case 0x10:
     99		info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
    100		return data;
    101	default:
    102		break;
    103	}
    104	return 0x00000000;
    105}
    106
    107u32
    108nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
    109{
    110
    111	u8  cnt, len;
    112	u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
    113	if (data && idx < cnt) {
    114		data = data + *hdr + idx * len;
    115		*hdr = len;
    116		return data;
    117	}
    118	return 0x00000000;
    119}
    120
    121u32
    122nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
    123	       struct nvbios_M0205S *info)
    124{
    125	u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
    126	memset(info, 0x00, sizeof(*info));
    127	switch (!!data * *ver) {
    128	case 0x10:
    129		info->data = nvbios_rd08(bios, data + 0x00);
    130		return data;
    131	default:
    132		break;
    133	}
    134	return 0x00000000;
    135}