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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Stefan Reinauer <stepan@openbios.org>
* Copyright (C) 2005 Nick Barker <nick.barker9@btinternet.com>
* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <string.h>
#include <arch/acpi.h>
#include <arch/acpigen.h>
#include <arch/smp/mpspec.h>
#include <device/device.h>
#include <device/pci_ids.h>
#include "i82371eb.h"
extern const unsigned char AmlCode[];
static int determine_total_number_of_cores(void)
{
device_t cpu;
int count = 0;
for(cpu = all_devices; cpu; cpu = cpu->next) {
if ((cpu->path.type != DEVICE_PATH_APIC) ||
(cpu->bus->dev->path.type != DEVICE_PATH_CPU_CLUSTER)) {
continue;
}
if (!cpu->enabled) {
continue;
}
count++;
}
return count;
}
void generate_cpu_entries(void)
{
int len;
int len_pr;
int cpu, pcontrol_blk=DEFAULT_PMBASE+PCNTRL, plen=6;
int numcpus = determine_total_number_of_cores();
printk(BIOS_DEBUG, "Found %d CPU(s).\n", numcpus);
/* without the outer scope, furhter ssdt addition will end up
* within the processor statement */
len = acpigen_write_scope("\\_PR");
for (cpu=0; cpu < numcpus; cpu++) {
len_pr = acpigen_write_processor(cpu, pcontrol_blk, plen);
acpigen_patch_len(len_pr - 1);
len += len_pr;
}
acpigen_patch_len(len - 1);
}
unsigned long __attribute__((weak)) acpi_fill_slit(unsigned long current)
{
// Not implemented
return current;
}
unsigned long __attribute__((weak)) acpi_fill_srat(unsigned long current)
{
// Not implemented
return current;
}
unsigned long __attribute__((weak)) acpi_fill_madt(unsigned long current)
{
/* mainboard has no ioapic */
return current;
}
unsigned long __attribute__((weak)) acpi_fill_mcfg(unsigned long current)
{
/* chipset doesn't have mmconfig */
return current;
}
unsigned long __attribute__((weak)) acpi_fill_ssdt_generator(unsigned long current,
const char *oem_table_id)
{
acpigen_write_mainboard_resources("\\_SB.PCI0.MBRS", "_CRS");
/* generate_cpu_entries() generates weird bytecode and has to come
* last or else the following entries will end up inside the
* processor scope */
generate_cpu_entries();
return (unsigned long) acpigen_get_current();
}
unsigned long __attribute__((weak)) write_acpi_tables(unsigned long start)
{
unsigned long current;
acpi_rsdp_t *rsdp;
acpi_rsdt_t *rsdt;
acpi_fadt_t *fadt;
acpi_facs_t *facs;
acpi_madt_t *madt;
acpi_header_t *ssdt;
acpi_header_t *dsdt;
/* Align ACPI tables to 16 byte. */
start = ALIGN(start, 16);
current = start;
printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx...\n", start);
/* We need at least an RSDP and an RSDT table. */
rsdp = (acpi_rsdp_t *) current;
current += sizeof(acpi_rsdp_t);
rsdt = (acpi_rsdt_t *) current;
current += sizeof(acpi_rsdt_t);
/* Clear all table memory. */
memset((void *) start, 0, current - start);
acpi_write_rsdp(rsdp, rsdt, NULL);
acpi_write_rsdt(rsdt);
/* We explicitly add these tables later on: */
printk(BIOS_DEBUG, "ACPI: * FACS\n");
/* we should align FACS to 64B as per ACPI specs */
current = ALIGN(current, 64);
facs = (acpi_facs_t *) current;
current += sizeof(acpi_facs_t);
acpi_create_facs(facs);
dsdt = (acpi_header_t *)current;
memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
current += dsdt->length;
memcpy(dsdt, &AmlCode, dsdt->length);
/* Don't trust iasl to get checksum right. */
dsdt->checksum = 0; /* needs to be set to 0 first (part of csum) */
dsdt->checksum = acpi_checksum((u8*)dsdt, dsdt->length);
printk(BIOS_DEBUG, "ACPI: * DSDT @ %p Length %x\n", dsdt,
dsdt->length);
printk(BIOS_DEBUG, "ACPI: * FADT\n");
fadt = (acpi_fadt_t *) current;
current += sizeof(acpi_fadt_t);
acpi_create_fadt(fadt, facs, dsdt);
acpi_add_table(rsdp, fadt);
printk(BIOS_DEBUG, "ACPI: * MADT\n");
madt = (acpi_madt_t *) current;
acpi_create_madt(madt);
if (madt->header.length > sizeof(acpi_madt_t)) {
current += madt->header.length;
acpi_add_table(rsdp, madt);
} else {
/* don't add empty madt */
current = (unsigned long)madt;
}
printk(BIOS_DEBUG, "ACPI: * SSDT\n");
ssdt = (acpi_header_t *)current;
acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
current += ssdt->length;
acpi_add_table(rsdp, ssdt);
printk(BIOS_INFO, "ACPI: done.\n");
return current;
}
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