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/* ----------------------------------------------------------------------- *
*
* Copyright 2009-2011 Erwan Velu - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* -----------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <dprintf.h>
#include "acpi/acpi.h"
int search_rsdp(s_acpi * acpi)
{
/* Let's seach for RSDT table */
uint8_t *q;
/* Let's start for the base address */
for (q = (uint8_t *)RSDP_MIN_ADDRESS; q < (uint8_t *)RSDP_MAX_ADDRESS; q+=16 ) {
/* Searching for RSDP with "RSD PTR" signature */
if (memcmp(q, RSDP, sizeof(RSDP)-1) == 0) {
s_rsdp *r = &acpi->rsdp;
r->valid = true;
r->address = q;
cp_str_struct(r->signature);
cp_struct(&r->checksum);
cp_str_struct(r->oem_id);
cp_struct(&r->revision);
cp_struct(&r->rsdt_address);
cp_struct(&r->length);
cp_struct(&r->xsdt_address);
cp_struct(&r->extended_checksum);
q += 3; /* reserved field */
acpi->rsdt.address = r->rsdt_address;
acpi->xsdt.address = r->xsdt_address;
DEBUG_PRINT(("RSDT should be at %p\n",r->rsdt_address));
DEBUG_PRINT(("XSDT should be at %p\n",r->xsdt_address));
return RSDP_TABLE_FOUND;
}
}
return -RSDP_TABLE_FOUND;
}
void print_rsdp(s_acpi * acpi)
{
s_rsdp *r = &acpi->rsdp;
if (!r->valid)
return;
printf("RSDP Table @ 0x%p\n", r->address);
printf(" signature : %s\n", r->signature);
printf(" checksum : %u\n", r->checksum);
printf(" oem id : %s\n", r->oem_id);
printf(" revision : %u\n", r->revision);
printf(" RDST address : %p\n", r->rsdt_address);
printf(" length : %u\n", r->length);
printf(" XSDT address : %p\n", r->xsdt_address);
printf(" extended checksum : %u\n", r->extended_checksum);
}
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