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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nv20.c (2564B)

      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
     33nv20_devinit_meminit(struct nvkm_devinit *init)
     34{
     35	struct nvkm_subdev *subdev = &init->subdev;
     36	struct nvkm_device *device = subdev->device;
     37	uint32_t mask = (device->chipset >= 0x25 ? 0x300 : 0x900);
     38	uint32_t amount, off;
     39	struct io_mapping *fb;
     40
     41	/* Map the framebuffer aperture */
     42	fb = fbmem_init(device);
     43	if (!fb) {
     44		nvkm_error(subdev, "failed to map fb\n");
     45		return;
     46	}
     47
     48	nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
     49
     50	/* Allow full addressing */
     51	nvkm_mask(device, NV04_PFB_CFG0, 0, mask);
     52
     53	amount = nvkm_rd32(device, 0x10020c);
     54	for (off = amount; off > 0x2000000; off -= 0x2000000)
     55		fbmem_poke(fb, off - 4, off);
     56
     57	amount = nvkm_rd32(device, 0x10020c);
     58	if (amount != fbmem_peek(fb, amount - 4))
     59		/* IC missing - disable the upper half memory space. */
     60		nvkm_mask(device, NV04_PFB_CFG0, mask, 0);
     61
     62	fbmem_fini(fb);
     63}
     64
     65static const struct nvkm_devinit_func
     66nv20_devinit = {
     67	.dtor = nv04_devinit_dtor,
     68	.preinit = nv04_devinit_preinit,
     69	.post = nv04_devinit_post,
     70	.meminit = nv20_devinit_meminit,
     71	.pll_set = nv04_devinit_pll_set,
     72};
     73
     74int
     75nv20_devinit_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     76		 struct nvkm_devinit **pinit)
     77{
     78	return nv04_devinit_new_(&nv20_devinit, device, type, inst, pinit);
     79}