78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2009-2011 Erwan Velu - All Rights Reserved
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* -----------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <string.h>
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#include <memory.h>
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#include <stdlib.h>
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#include "acpi/acpi.h"
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int parse_xsdt(s_acpi * acpi)
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{
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/* Let's seach for XSDT table */
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uint8_t *q;
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/* Let's start for the base address */
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q = acpi->xsdt.address;
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/* If address is null return an error */
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if (q == 0 ) {
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DEBUG_PRINT(("XSDT is null, exiting\n"));
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return -XSDT_TABLE_FOUND;
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}
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DEBUG_PRINT(("Searching XSDT at %p",q));
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/* Searching for MADT with APIC signature */
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if (memcmp(q, XSDT, sizeof(XSDT) - 1) == 0) {
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s_xsdt *x = &acpi->xsdt;
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x->valid = true;
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get_acpi_description_header(q, &x->header);
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DEBUG_PRINT(("XSDT table found at %p : length=%d\n",x->address,x->header.length));
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DEBUG_PRINT(("Expected Tables = %d\n",(x->header.length-ACPI_HEADER_SIZE)/8));
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/* We now have a set of pointers to some tables */
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uint64_t *p = NULL;
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for (p = ((uint64_t *)(x->address + ACPI_HEADER_SIZE));
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p < ((uint64_t *)(x->address + x->header.length)); p++) {
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DEBUG_PRINT((" Looking for HEADER at %p = %x\n",p,*p));
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/* Let's grab the pointed table header */
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char address[16] = { 0 };
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sprintf(address, "%llx", *p);
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uint64_t *pointed_address = (uint64_t *)strtoul(address, NULL, 16);
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x->entry[x->entry_count] = pointed_address;
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if (parse_header(pointed_address, acpi)) {
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x->entry_count++;
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}
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}
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return XSDT_TABLE_FOUND;
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}
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return -XSDT_TABLE_FOUND;
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}
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