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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nv10.c (3139B)

      1/*
      2 * Copyright (C) 2010 Francisco Jerez.
      3 * All Rights Reserved.
      4 *
      5 * Permission is hereby granted, free of charge, to any person obtaining
      6 * a copy of this software and associated documentation files (the
      7 * "Software"), to deal in the Software without restriction, including
      8 * without limitation the rights to use, copy, modify, merge, publish,
      9 * distribute, sublicense, and/or sell copies of the Software, and to
     10 * permit persons to whom the Software is furnished to do so, subject to
     11 * the following conditions:
     12 *
     13 * The above copyright notice and this permission notice (including the
     14 * next paragraph) shall be included in all copies or substantial
     15 * portions of the Software.
     16 *
     17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24 *
     25 */
     26#include "nv04.h"
     27#include "fbmem.h"
     28
     29#include <subdev/bios.h>
     30#include <subdev/bios/init.h>
     31
     32static void
     33nv10_devinit_meminit(struct nvkm_devinit *init)
     34{
     35	struct nvkm_subdev *subdev = &init->subdev;
     36	struct nvkm_device *device = subdev->device;
     37	static const int mem_width[] = { 0x10, 0x00, 0x20 };
     38	int mem_width_count;
     39	uint32_t patt = 0xdeadbeef;
     40	struct io_mapping *fb;
     41	int i, j, k;
     42
     43	if (device->card_type >= NV_11 && device->chipset >= 0x17)
     44		mem_width_count = 3;
     45	else
     46		mem_width_count = 2;
     47
     48	/* Map the framebuffer aperture */
     49	fb = fbmem_init(device);
     50	if (!fb) {
     51		nvkm_error(subdev, "failed to map fb\n");
     52		return;
     53	}
     54
     55	nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
     56
     57	/* Probe memory bus width */
     58	for (i = 0; i < mem_width_count; i++) {
     59		nvkm_mask(device, NV04_PFB_CFG0, 0x30, mem_width[i]);
     60
     61		for (j = 0; j < 4; j++) {
     62			for (k = 0; k < 4; k++)
     63				fbmem_poke(fb, 0x1c, 0);
     64
     65			fbmem_poke(fb, 0x1c, patt);
     66			fbmem_poke(fb, 0x3c, 0);
     67
     68			if (fbmem_peek(fb, 0x1c) == patt)
     69				goto mem_width_found;
     70		}
     71	}
     72
     73mem_width_found:
     74	patt <<= 1;
     75
     76	/* Probe amount of installed memory */
     77	for (i = 0; i < 4; i++) {
     78		int off = nvkm_rd32(device, 0x10020c) - 0x100000;
     79
     80		fbmem_poke(fb, off, patt);
     81		fbmem_poke(fb, 0, 0);
     82
     83		fbmem_peek(fb, 0);
     84		fbmem_peek(fb, 0);
     85		fbmem_peek(fb, 0);
     86		fbmem_peek(fb, 0);
     87
     88		if (fbmem_peek(fb, off) == patt)
     89			goto amount_found;
     90	}
     91
     92	/* IC missing - disable the upper half memory space. */
     93	nvkm_mask(device, NV04_PFB_CFG0, 0x1000, 0);
     94
     95amount_found:
     96	fbmem_fini(fb);
     97}
     98
     99static const struct nvkm_devinit_func
    100nv10_devinit = {
    101	.dtor = nv04_devinit_dtor,
    102	.preinit = nv04_devinit_preinit,
    103	.post = nv04_devinit_post,
    104	.meminit = nv10_devinit_meminit,
    105	.pll_set = nv04_devinit_pll_set,
    106};
    107
    108int
    109nv10_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
    110		 struct nvkm_devinit **pinit)
    111{
    112	return nv04_devinit_new_(&nv10_devinit, device, type, inst, pinit);
    113}