payloads/libpayload/arch/arm/sysinfo.c

   1 /*
   2  *
   3  * Copyright (C) 2008 Advanced Micro Devices, Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <libpayload-config.h>
  30 #include <libpayload.h>
  31 #include <coreboot_tables.h>
  32
  33 /**
  34  * This is a global structure that is used through the library - we set it
  35  * up initially with some dummy values - hopefully they will be overridden.
  36  */
  37 struct sysinfo_t lib_sysinfo = {
  38         .cpu_khz = 200,
  39 };
  40
  41 int lib_get_sysinfo(void)
  42 {
  43         int ret;
  44
  45         /* Get the CPU speed (for delays). */
  46         lib_sysinfo.cpu_khz = get_cpu_speed();
  47
  48         /* Get information from the coreboot tables,
  49          * if they exist */
  50
  51         ret = get_coreboot_info(&lib_sysinfo);
  52
  53         if (!lib_sysinfo.n_memranges) {
  54                 /* If we can't get a good memory range, use the default. */
  55                 lib_sysinfo.n_memranges = 2;
  56
  57                 lib_sysinfo.memrange[0].base = 0;
  58                 lib_sysinfo.memrange[0].size = 1024 * 1024;
  59                 lib_sysinfo.memrange[0].type = CB_MEM_RAM;
  60         }
  61
  62         return ret;
  63 }