com32/gpllib/acpi/rsdp.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2009-2011 Erwan Velu - All Rights Reserved
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * -----------------------------------------------------------------------
  27 */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <memory.h>
  33 #include <dprintf.h>
  34 #include "acpi/acpi.h"
  35
  36 int search_rsdp(s_acpi * acpi)
  37 {
  38     /* Let's seach for RSDT table */
  39     uint8_t *q;
  40
  41     /* Let's start for the base address */
  42     for (q = (uint8_t *)RSDP_MIN_ADDRESS; q < (uint8_t *)RSDP_MAX_ADDRESS; q+=16 ) {
  43         /* Searching for RSDP with "RSD PTR" signature */
  44         if (memcmp(q, RSDP, sizeof(RSDP)-1) == 0) {
  45             s_rsdp *r = &acpi->rsdp;
  46             r->valid = true;
  47             r->address = q;
  48             cp_str_struct(r->signature);
  49             cp_struct(&r->checksum);
  50             cp_str_struct(r->oem_id);
  51             cp_struct(&r->revision);
  52             cp_struct(&r->rsdt_address);
  53             cp_struct(&r->length);
  54             cp_struct(&r->xsdt_address);
  55             cp_struct(&r->extended_checksum);
  56             q += 3;             /* reserved field */
  57             acpi->rsdt.address = r->rsdt_address;
  58             acpi->xsdt.address = r->xsdt_address;
  59             DEBUG_PRINT(("RSDT should be at %p\n",r->rsdt_address));
  60             DEBUG_PRINT(("XSDT should be at %p\n",r->xsdt_address));
  61             return RSDP_TABLE_FOUND;
  62         }
  63     }
  64     return -RSDP_TABLE_FOUND;
  65 }
  66
  67 void print_rsdp(s_acpi * acpi)
  68 {
  69     s_rsdp *r = &acpi->rsdp;
  70
  71     if (!r->valid)
  72         return;
  73     printf("RSDP Table @ 0x%p\n", r->address);
  74     printf(" signature         : %s\n", r->signature);
  75     printf(" checksum          : %u\n", r->checksum);
  76     printf(" oem id            : %s\n", r->oem_id);
  77     printf(" revision          : %u\n", r->revision);
  78     printf(" RDST address      : %p\n", r->rsdt_address);
  79     printf(" length            : %u\n", r->length);
  80     printf(" XSDT address      : %p\n", r->xsdt_address);
  81     printf(" extended checksum : %u\n", r->extended_checksum);
  82 }