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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ramnv04.c (2062B)

      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 "ram.h"
     25#include "regsnv04.h"
     26
     27const struct nvkm_ram_func
     28nv04_ram_func = {
     29};
     30
     31int
     32nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
     33{
     34	struct nvkm_device *device = fb->subdev.device;
     35	u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
     36	u64 size;
     37	enum nvkm_ram_type type;
     38
     39	if (boot0 & 0x00000100) {
     40		size  = ((boot0 >> 12) & 0xf) * 2 + 2;
     41		size *= 1024 * 1024;
     42	} else {
     43		switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
     44		case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
     45			size = 32 * 1024 * 1024;
     46			break;
     47		case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
     48			size = 16 * 1024 * 1024;
     49			break;
     50		case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
     51			size = 8 * 1024 * 1024;
     52			break;
     53		case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
     54			size = 4 * 1024 * 1024;
     55			break;
     56		}
     57	}
     58
     59	if ((boot0 & 0x00000038) <= 0x10)
     60		type = NVKM_RAM_TYPE_SGRAM;
     61	else
     62		type = NVKM_RAM_TYPE_SDRAM;
     63
     64	return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
     65}