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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gma_device.c (1192B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/**************************************************************************
      3 * Copyright (c) 2011, Intel Corporation.
      4 * All Rights Reserved.
      5 *
      6 **************************************************************************/
      7
      8#include "psb_drv.h"
      9#include "gma_device.h"
     10
     11void gma_get_core_freq(struct drm_device *dev)
     12{
     13	uint32_t clock;
     14	struct pci_dev *pdev = to_pci_dev(dev->dev);
     15	struct pci_dev *pci_root =
     16		pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
     17					    0, 0);
     18	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
     19
     20	/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
     21	/*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
     22
     23	pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
     24	pci_read_config_dword(pci_root, 0xD4, &clock);
     25	pci_dev_put(pci_root);
     26
     27	switch (clock & 0x07) {
     28	case 0:
     29		dev_priv->core_freq = 100;
     30		break;
     31	case 1:
     32		dev_priv->core_freq = 133;
     33		break;
     34	case 2:
     35		dev_priv->core_freq = 150;
     36		break;
     37	case 3:
     38		dev_priv->core_freq = 178;
     39		break;
     40	case 4:
     41		dev_priv->core_freq = 200;
     42		break;
     43	case 5:
     44	case 6:
     45	case 7:
     46		dev_priv->core_freq = 266;
     47		break;
     48	default:
     49		dev_priv->core_freq = 0;
     50	}
     51}