payloads/libpayload/arch/x86/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 #include <multiboot_tables.h>
  33
  34 #define CPU_KHZ_DEFAULT 200
  35
  36 /**
  37  * This is a global structure that is used through the library - we set it
  38  * up initially with some dummy values - hopefully they will be overridden.
  39  */
  40 struct sysinfo_t lib_sysinfo = {
  41         .cpu_khz = CPU_KHZ_DEFAULT,
  42 #if CONFIG(LP_SERIAL_CONSOLE)
  43         .ser_ioport = CONFIG_LP_SERIAL_IOBASE,
  44 #else
  45         .ser_ioport = 0x3f8,
  46 #endif
  47 };
  48
  49 int lib_get_sysinfo(void)
  50 {
  51         int ret;
  52
  53 #if CONFIG(LP_MULTIBOOT)
  54         /* Get the information from the multiboot tables,
  55          * if they exist */
  56         get_multiboot_info(&lib_sysinfo);
  57 #endif
  58
  59         /* Get information from the coreboot tables,
  60          * if they exist */
  61
  62         ret = get_coreboot_info(&lib_sysinfo);
  63
  64         /* Get the CPU speed (for delays) if not set from the default value. */
  65         if (lib_sysinfo.cpu_khz == CPU_KHZ_DEFAULT)
  66                 lib_sysinfo.cpu_khz = get_cpu_speed();
  67
  68         if (!lib_sysinfo.n_memranges) {
  69                 /* If we can't get a good memory range, use the default. */
  70                 lib_sysinfo.n_memranges = 2;
  71
  72                 lib_sysinfo.memrange[0].base = 0;
  73                 lib_sysinfo.memrange[0].size = 640 * 1024;
  74                 lib_sysinfo.memrange[0].type = CB_MEM_RAM;
  75
  76                 lib_sysinfo.memrange[1].base = 1024 * 1024;
  77                 lib_sysinfo.memrange[1].size = 31 * 1024 * 1024;
  78                 lib_sysinfo.memrange[1].type = CB_MEM_RAM;
  79         }
  80
  81 #if CONFIG(LP_PCI)
  82         pci_init(&lib_sysinfo.pacc);
  83         pci_scan_bus(&lib_sysinfo.pacc);
  84 #endif
  85
  86         return ret;
  87 }