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

P0260.c (3005B)

      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/P0260.h>
     27
     28u32
     29nvbios_P0260Te(struct nvkm_bios *bios,
     30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
     31{
     32	struct bit_entry bit_P;
     33	u32 data = 0x00000000;
     34
     35	if (!bit_entry(bios, 'P', &bit_P)) {
     36		if (bit_P.version == 2 && bit_P.length > 0x63)
     37			data = nvbios_rd32(bios, bit_P.offset + 0x60);
     38		if (data) {
     39			*ver = nvbios_rd08(bios, data + 0);
     40			switch (*ver) {
     41			case 0x10:
     42				*hdr = nvbios_rd08(bios, data + 1);
     43				*cnt = nvbios_rd08(bios, data + 2);
     44				*len = 4;
     45				*xnr = nvbios_rd08(bios, data + 3);
     46				*xsz = 4;
     47				return data;
     48			default:
     49				break;
     50			}
     51		}
     52	}
     53
     54	return 0x00000000;
     55}
     56
     57u32
     58nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
     59{
     60	u8  hdr, cnt, xnr, xsz;
     61	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
     62	if (data && idx < cnt)
     63		return data + hdr + (idx * *len);
     64	return 0x00000000;
     65}
     66
     67u32
     68nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
     69	       struct nvbios_P0260E *info)
     70{
     71	u32 data = nvbios_P0260Ee(bios, idx, ver, len);
     72	memset(info, 0x00, sizeof(*info));
     73	switch (!!data * *ver) {
     74	case 0x10:
     75		info->data = nvbios_rd32(bios, data);
     76		return data;
     77	default:
     78		break;
     79	}
     80	return 0x00000000;
     81}
     82
     83u32
     84nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
     85{
     86	u8  hdr, cnt, len, xnr;
     87	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
     88	if (data && idx < xnr)
     89		return data + hdr + (cnt * len) + (idx * *xsz);
     90	return 0x00000000;
     91}
     92
     93u32
     94nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
     95	       struct nvbios_P0260X *info)
     96{
     97	u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
     98	memset(info, 0x00, sizeof(*info));
     99	switch (!!data * *ver) {
    100	case 0x10:
    101		info->data = nvbios_rd32(bios, data);
    102		return data;
    103	default:
    104		break;
    105	}
    106	return 0x00000000;
    107}