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 } 83
