83 lines
2.9 KiB
C
83 lines
2.9 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 <stdlib.h>
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#include <string.h>
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#include <memory.h>
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#include <dprintf.h>
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#include "acpi/acpi.h"
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int search_rsdp(s_acpi * acpi)
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{
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/* Let's seach for RSDT table */
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uint8_t *q;
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/* Let's start for the base address */
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for (q = (uint8_t *)RSDP_MIN_ADDRESS; q < (uint8_t *)RSDP_MAX_ADDRESS; q+=16 ) {
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/* Searching for RSDP with "RSD PTR" signature */
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if (memcmp(q, RSDP, sizeof(RSDP)-1) == 0) {
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s_rsdp *r = &acpi->rsdp;
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r->valid = true;
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r->address = q;
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cp_str_struct(r->signature);
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cp_struct(&r->checksum);
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cp_str_struct(r->oem_id);
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cp_struct(&r->revision);
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cp_struct(&r->rsdt_address);
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cp_struct(&r->length);
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cp_struct(&r->xsdt_address);
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cp_struct(&r->extended_checksum);
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q += 3; /* reserved field */
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acpi->rsdt.address = r->rsdt_address;
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acpi->xsdt.address = r->xsdt_address;
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DEBUG_PRINT(("RSDT should be at %p\n",r->rsdt_address));
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DEBUG_PRINT(("XSDT should be at %p\n",r->xsdt_address));
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return RSDP_TABLE_FOUND;
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}
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}
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return -RSDP_TABLE_FOUND;
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}
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void print_rsdp(s_acpi * acpi)
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{
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s_rsdp *r = &acpi->rsdp;
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if (!r->valid)
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return;
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printf("RSDP Table @ 0x%p\n", r->address);
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printf(" signature : %s\n", r->signature);
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printf(" checksum : %u\n", r->checksum);
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printf(" oem id : %s\n", r->oem_id);
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printf(" revision : %u\n", r->revision);
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printf(" RDST address : %p\n", r->rsdt_address);
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printf(" length : %u\n", r->length);
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printf(" XSDT address : %p\n", r->xsdt_address);
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printf(" extended checksum : %u\n", r->extended_checksum);
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}
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