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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cpu-imx35.c (878B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * MX35 CPU type detection
      4 *
      5 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
      6 */
      7#include <linux/module.h>
      8#include <linux/of_address.h>
      9#include <linux/io.h>
     10
     11#include "hardware.h"
     12#include "iim.h"
     13
     14static int mx35_cpu_rev = -1;
     15
     16static int mx35_read_cpu_rev(void)
     17{
     18	void __iomem *iim_base;
     19	struct device_node *np;
     20	u32 rev;
     21
     22	np = of_find_compatible_node(NULL, NULL, "fsl,imx35-iim");
     23	iim_base = of_iomap(np, 0);
     24	BUG_ON(!iim_base);
     25
     26	rev = imx_readl(iim_base + MXC_IIMSREV);
     27	switch (rev) {
     28	case 0x00:
     29		return IMX_CHIP_REVISION_1_0;
     30	case 0x10:
     31		return IMX_CHIP_REVISION_2_0;
     32	case 0x11:
     33		return IMX_CHIP_REVISION_2_1;
     34	default:
     35		return IMX_CHIP_REVISION_UNKNOWN;
     36	}
     37}
     38
     39int mx35_revision(void)
     40{
     41	if (mx35_cpu_rev == -1)
     42		mx35_cpu_rev = mx35_read_cpu_rev();
     43
     44	return mx35_cpu_rev;
     45}
     46EXPORT_SYMBOL(mx35_revision);