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/*
* coreboot ACPI Table support
* written by Stefan Reinauer <stepan@openbios.org>
* ACPI FADT, FACS, and DSDT table support added by
* Nick Barker <nick.barker9@btinternet.com>, and those portions
* (C) Copyright 2004 Nick Barker
* (C) Copyright 2005 Stefan Reinauer
* (C) Copyright 2009 Jon Harrison <bothlyn@blueyonder.co.uk>
*
* 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
*/
/*
* Most parts of this file copied from via\epia-m\acpi_tables.c,
* and via\epia-m700\acpi_tables.c
*/
#include <console/console.h>
#include <string.h>
#include <arch/acpi.h>
#include <arch/ioapic.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include "southbridge/via/vt8237r/vt8237r.h"
extern const unsigned char AmlCode[];
/*
* These 8 macros are copied from <arch/smp/mpspec.h>, I have to do this
* since the "CONFIG_GENERATE_MP_TABLE = 0", and also since
* mainboard/via/... have no mptable.c (so that I can not set
* "CONFIG_GENERATE_MP_TABLE = 1" as many other mainboards.
* So I have to copy these four to here. acpi_fill_madt() needs this.
*/
#define MP_IRQ_POLARITY_DEFAULT 0x0
#define MP_IRQ_POLARITY_HIGH 0x1
#define MP_IRQ_POLARITY_LOW 0x3
#define MP_IRQ_POLARITY_MASK 0x3
#define MP_IRQ_TRIGGER_DEFAULT 0x0
#define MP_IRQ_TRIGGER_EDGE 0x4
#define MP_IRQ_TRIGGER_LEVEL 0xc
#define MP_IRQ_TRIGGER_MASK 0xc
unsigned long acpi_fill_mcfg(unsigned long current)
{
/* Nothing to do */
return current;
}
unsigned long acpi_fill_slit(unsigned long current)
{
// Not implemented
return current;
}
unsigned long acpi_create_madt_lapic_nmis(unsigned long current, u16 flags,
u8 lint)
{
device_t cpu;
int cpu_index = 0;
for (cpu = all_devices; cpu; cpu = cpu->next) {
if ((cpu->path.type != DEVICE_PATH_APIC) ||
(cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER)) {
continue;
}
if (!cpu->enabled)
continue;
current += acpi_create_madt_lapic_nmi((acpi_madt_lapic_nmi_t *)
current, cpu_index, flags, lint);
cpu_index++;
}
return current;
}
unsigned long acpi_fill_madt(unsigned long current)
{
unsigned int gsi_base = 0x00;
/* Create all subtables for processors. */
current = acpi_create_madt_lapics(current);
/* Write SB IOAPIC. */
current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *) current,
VT8237R_APIC_ID, IO_APIC_ADDR, gsi_base);
/* IRQ0 -> APIC IRQ2. */
current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
current, 0, 0, 2, 0x0);
/* IRQ9 ACPI active low. */
current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
current, 0, 9, 9, MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_LOW);
/* Create all subtables for processors. */
current = acpi_create_madt_lapic_nmis(current,
MP_IRQ_TRIGGER_EDGE | MP_IRQ_POLARITY_HIGH, 1);
return current;
}
unsigned long acpi_fill_srat(unsigned long current)
{
/* No NUMA, no SRAT */
return current;
}
#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
#define ALIGN_CURRENT current = ((current + 0x0f) & -0x10)
unsigned long write_acpi_tables(unsigned long start)
{
unsigned long current;
acpi_rsdp_t *rsdp;
acpi_rsdt_t *rsdt;
acpi_madt_t *madt;
acpi_fadt_t *fadt;
acpi_facs_t *facs;
acpi_header_t *dsdt;
/* Align ACPI tables to 16byte */
start = ( start + 0x0f ) & -0x10;
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");
current = ALIGN(current, 64);
facs = (acpi_facs_t *) current;
current += sizeof(acpi_facs_t);
acpi_create_facs(facs);
printk(BIOS_DEBUG, "ACPI: * DSDT\n");
dsdt = (acpi_header_t *)current;
memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
current += dsdt->length;
memcpy(dsdt, &AmlCode, dsdt->length);
#if 0
dsdt->checksum = 0; // don't trust intel iasl compiler to get this right
dsdt->checksum = acpi_checksum(dsdt,dsdt->length);
#endif
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);
/* If we want IOAPIC Support Linux wants it in MADT. */
printk(BIOS_DEBUG, "ACPI: * MADT\n");
madt = (acpi_madt_t *) current;
acpi_create_madt(madt);
current += madt->header.length;
acpi_add_table(rsdp, madt);
printk(BIOS_INFO, "ACPI: done.\n");
return current;
}
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