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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fsl-soc.c (966B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Freescale SOC support functions
      4 *
      5 * Author: Scott Wood <scottwood@freescale.com>
      6 *
      7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
      8 */
      9
     10#include "ops.h"
     11#include "types.h"
     12#include "fsl-soc.h"
     13#include "stdio.h"
     14
     15static u32 prop_buf[MAX_PROP_LEN / 4];
     16
     17u32 *fsl_get_immr(void)
     18{
     19	void *soc;
     20	unsigned long ret = 0;
     21
     22	soc = find_node_by_devtype(NULL, "soc");
     23	if (soc) {
     24		int size;
     25		u32 naddr;
     26
     27		size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
     28		if (size == 4)
     29			naddr = prop_buf[0];
     30		else
     31			naddr = 2;
     32
     33		if (naddr != 1 && naddr != 2)
     34			goto err;
     35
     36		size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
     37
     38		if (size < 12)
     39			goto err;
     40		if (prop_buf[0] != 0)
     41			goto err;
     42		if (naddr == 2 && prop_buf[1] != 0)
     43			goto err;
     44
     45		if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
     46			ret = 0;
     47	}
     48
     49err:
     50	if (!ret)
     51		printf("fsl_get_immr: Failed to find immr base\r\n");
     52
     53	return (u32 *)ret;
     54}