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/* ----------------------------------------------------------------------- *
*
* Copyright 2009 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 <string.h>
#include <memory.h>
#include <stdlib.h>
#include "acpi/acpi.h"
int parse_xsdt(s_acpi * acpi)
{
/* Let's seach for XSDT table */
uint8_t *q;
/* Let's start for the base address */
q = acpi->xsdt.address;
/* Searching for MADT with APIC signature */
if (memcmp(q, XSDT, sizeof(XSDT) - 1) == 0) {
DEBUG_PRINT(("XSDT table found\n"));
s_xsdt *x = &acpi->xsdt;
x->valid = true;
get_acpi_description_header(q, &x->header);
/* We now have a set of pointers to some tables */
uint8_t *p = NULL;
for (p = (x->address + ACPI_HEADER_SIZE);
p < (x->address + x->header.length); p++) {
s_acpi_description_header adh;
memset(&adh, 0, sizeof(adh));
x->entry[x->entry_count] = p;
/* Let's grab the pointed table header */
get_acpi_description_header(p, &adh);
/* Trying to determine the pointed table */
/* Looking for FADT */
if (memcmp(adh.signature, FACP, sizeof(FACP) - 1) == 0) {
DEBUG_PRINT(("FACP table found\n"));
s_fadt *f = &acpi->fadt;
s_facs *fa = &acpi->facs;
s_dsdt *d = &acpi->dsdt;
/* This structure is valid, let's fill it */
f->valid = true;
f->address = p;
memcpy(&f->header, &adh, sizeof(adh));
parse_fadt(f);
/* FACS wasn't already detected
* FADT points to it, let's try to detect it */
if (fa->valid == false) {
fa->address = f->x_firmware_ctrl;
parse_facs(fa);
if (fa->valid == false) {
/* Let's try again */
fa->address = f->firmware_ctrl;
parse_facs(fa);
}
}
/* DSDT wasn't already detected
* FADT points to it, let's try to detect it */
if (d->valid == false) {
s_acpi_description_header new_adh;
get_acpi_description_header(f->x_dsdt,
&new_adh);
if (memcmp(new_adh.signature, DSDT, sizeof(DSDT) - 1) == 0) {
DEBUG_PRINT(("DSDT table found\n"));
d->valid = true;
d->address = f->x_dsdt;
memcpy(&d->header, &new_adh, sizeof(new_adh));
parse_dsdt(d);
} else {
/* Let's try again */
get_acpi_description_header(f->dsdt_address,
&new_adh);
if (memcmp(new_adh.signature, DSDT, sizeof(DSDT) - 1) ==
0) {
d->valid = true;
d->address = f->dsdt_address;
memcpy(&d->header, &new_adh, sizeof(new_adh));
parse_dsdt(d);
}
}
}
} /* Looking for MADT */
else if (memcmp(adh.signature, APIC, sizeof(APIC) - 1) == 0) {
DEBUG_PRINT(("MADT table found\n"));
s_madt *m = &acpi->madt;
/* This structure is valid, let's fill it */
m->valid = true;
m->address = p;
memcpy(&m->header, &adh, sizeof(adh));
parse_madt(acpi);
} else if (memcmp(adh.signature, DSDT, sizeof(DSDT) - 1) == 0) {
DEBUG_PRINT(("DSDT table found\n"));
s_dsdt *d = &acpi->dsdt;
/* This structure is valid, let's fill it */
d->valid = true;
d->address = p;
memcpy(&d->header, &adh, sizeof(adh));
parse_dsdt(d);
/* PSDT have to be considered as SSDT. Intel ACPI Spec @ 5.2.11.3 */
} else if ((memcmp(adh.signature, SSDT, sizeof(SSDT) - 1) == 0)
|| (memcmp(adh.signature, PSDT, sizeof(PSDT) - 1) == 0)) {
DEBUG_PRINT(("SSDT table found with %s \n",adh.signature));
if ((acpi->ssdt_count >= MAX_SSDT - 1))
break;
/* We can have many SSDT, so let's allocate a new one */
if ((acpi->ssdt[acpi->ssdt_count] =
malloc(sizeof(s_ssdt))) == NULL)
break;
s_ssdt *s = acpi->ssdt[acpi->ssdt_count];
/* This structure is valid, let's fill it */
s->valid = true;
s->address = p;
memcpy(&s->header, &adh, sizeof(adh));
/* Searching how much definition blocks we must copy */
uint32_t definition_block_size = adh.length - ACPI_HEADER_SIZE;
if ((s->definition_block =
malloc(definition_block_size)) != NULL) {
memcpy(s->definition_block,
(s->address + ACPI_HEADER_SIZE),
definition_block_size);
}
/* Increment the number of ssdt we have */
acpi->ssdt_count++;
} else if (memcmp(adh.signature, SBST, sizeof(SBST) - 1) == 0) {
DEBUG_PRINT(("SBST table found\n"));
s_sbst *s = &acpi->sbst;
/* This structure is valid, let's fill it */
s->valid = true;
s->address = p;
memcpy(&s->header, &adh, sizeof(adh));
parse_sbst(s);
} else if (memcmp(adh.signature, ECDT, sizeof(ECDT) - 1) == 0) {
DEBUG_PRINT(("ECDT table found\n"));
s_ecdt *e = &acpi->ecdt;
/* This structure is valid, let's fill it */
e->valid = true;
e->address = p;
memcpy(&e->header, &adh, sizeof(adh));
parse_ecdt(e);
}
x->entry_count++;
}
return XSDT_TABLE_FOUND;
}
return -XSDT_TABLE_FOUND;
}
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