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 <string.h> 31 #include <memory.h> 32 #include <stdlib.h> 33 #include "acpi/acpi.h" 34 35 int parse_xsdt(s_acpi * acpi) 36 { 37 /* Let's seach for XSDT table */ 38 uint8_t *q; 39 40 /* Let's start for the base address */ 41 q = acpi->xsdt.address; 42 43 /* If address is null return an error */ 44 if (q == 0 ) { 45 DEBUG_PRINT(("XSDT is null, exiting\n")); 46 return -XSDT_TABLE_FOUND; 47 } 48 49 DEBUG_PRINT(("Searching XSDT at %p",q)); 50 /* Searching for MADT with APIC signature */ 51 if (memcmp(q, XSDT, sizeof(XSDT) - 1) == 0) { 52 s_xsdt *x = &acpi->xsdt; 53 x->valid = true; 54 get_acpi_description_header(q, &x->header); 55 DEBUG_PRINT(("XSDT table found at %p : length=%d\n",x->address,x->header.length)); 56 DEBUG_PRINT(("Expected Tables = %d\n",(x->header.length-ACPI_HEADER_SIZE)/8)); 57 58 /* We now have a set of pointers to some tables */ 59 uint64_t *p = NULL; 60 for (p = ((uint64_t *)(x->address + ACPI_HEADER_SIZE)); 61 p < ((uint64_t *)(x->address + x->header.length)); p++) { 62 DEBUG_PRINT((" Looking for HEADER at %p = %x\n",p,*p)); 63 64 /* Let's grab the pointed table header */ 65 char address[16] = { 0 }; 66 sprintf(address, "%llx", *p); 67 uint64_t *pointed_address = (uint64_t *)strtoul(address, NULL, 16); 68 69 x->entry[x->entry_count] = pointed_address; 70 if (parse_header(pointed_address, acpi)) { 71 x->entry_count++; 72 } 73 } 74 return XSDT_TABLE_FOUND; 75 } 76 return -XSDT_TABLE_FOUND; 77 } 78
